WebKit: Failing to play most HTML5 videos

WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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Hey,

since a general update a week ago or so, it seems that I'm unable to
play most HTML5 videos.  Youtube works.
imdb.com fails, and so do most other websites with a similar error.

Did something broke with gstreamer / gst-plugins?

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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Forgot to mention: I've tested with Epiphany, Vimb and Next browser, with
similar results.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[swedebugia]

On 2018-12-08 13:39, Pierre Neidhardt wrote:
> Forgot to mention: I've tested with Epiphany, Vimb and Next browser, with
> similar results.

I tested with Next and epiphany. All sites fail here. svtplay.se and
youtube.com tested.

-- 
Cheers 
Swedebugia

Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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I got Youtube to work with Vimb when gst-libav is installed.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Leo Famulari]

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On Sat, Dec 08, 2018 at 01:30:46PM +0100, Pierre Neidhardt wrote:
> Hey,
> 
> since a general update a week ago or so, it seems that I'm unable to
> play most HTML5 videos.  Youtube works.
> imdb.com fails, and so do most other websites with a similar error.
> 
> Did something broke with gstreamer / gst-plugins?

It works for me on Debian if I install (at least) gst-plugins-base and
gst-plugins-good. gst-plugins-base is already in the graph of epiphany,
but epiphany does not keep a store reference to it.

I think the browser should support these videos "out of the box".

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Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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Leo Famulari <leo@famulari.name> writes:
> It works for me on Debian if I install (at least) gst-plugins-base and...

Hmm, weird.  Possible explanations I can see:

- It's hardware related.  I have an Intel HD 620, driver i915.
- Something is not purely functional in the dependency graph.
- It's kernel related, I am on GuixSD.

It used to work perfectly a few weeks ago.  I'll have to try out the different
kernel/mesa/gstreamer combinations.  Pfeww, lots of work :(

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[swedebugia]

On 2018-12-09 13:21, Pierre Neidhardt wrote:
> Leo Famulari <leo@famulari.name> writes:
>> It works for me on Debian if I install (at least) gst-plugins-base and...
> 
> Hmm, weird.  Possible explanations I can see:
> 
> - It's hardware related.  I have an Intel HD 620, driver i915.
I really doubt that. I just changed from a o686 to a x86_64 machine with
different hardware and it is exactly the same issue.
When it plays it is lacky, glitchy. On parabola/antergos on the same
machine it plays smoothly (so not HW issue).

> - Something is not purely functional in the dependency graph.
> - It's kernel related, I am on GuixSD.
> 
> It used to work perfectly a few weeks ago.  I'll have to try out the different
> kernel/mesa/gstreamer combinations.  Pfeww, lots of work :(

Good luck hunting :)

-- 
Cheers 
Swedebugia

Re: WebKit: Failing to play most HTML5 videos

[Ricardo Wurmus]

Pierre Neidhardt <mail@ambrevar.xyz> writes:

> Leo Famulari <leo@famulari.name> writes:
>> It works for me on Debian if I install (at least) gst-plugins-base and...
>
> Hmm, weird.  Possible explanations I can see:
>
> - It's hardware related.  I have an Intel HD 620, driver i915.
> - Something is not purely functional in the dependency graph.
> - It's kernel related, I am on GuixSD.
>
> It used to work perfectly a few weeks ago.  I'll have to try out the different
> kernel/mesa/gstreamer combinations.  Pfeww, lots of work :(

I don’t think the kernel is at fault.  This is usually a problem with
gstreamer only.  Do not forget about environment variables.

I’d suggest looking for gstreamer debugging options and tracing the
discovery of plugins specifically.

I’m seeing the same behaviour in epiphany (and eolie), both webkit
browsers.  I have these gstreamer packages installed:

gst-plugins-good	1.14.3	out	/gnu/store/ar5i930rzx6gx0fllxlj7v0di8av98dn-gst-plugins-good-1.14.3
gst-plugins-ugly	1.14.3	out	/gnu/store/7w2bqvdnylh4y87m6r40k644pxd17g3x-gst-plugins-ugly-1.14.3
gst-plugins-bad	1.14.3	out	/gnu/store/x8m0kdj9x6smm6ybwd3rzkcpqw809pim-gst-plugins-bad-1.14.3
gst-plugins-base	1.14.3	out	/gnu/store/hyjjxxc2q5sfhkmm9iq3g34afm21b62v-gst-plugins-base-1.14.3

I used to also have gst-libav, which made a lot of things work better at
a time.

Relevant environment variables:

    GST_PLUGIN_SYSTEM_PATH=/home/rekado/.guix-profile/lib/gstreamer-1.0:/run/current-system/profile/lib/gstreamer-1.0
    GST_PLUGIN_PATH=/home/rekado/.guix-profile/lib/gstreamer-1.0

--
Ricardo

Re: WebKit: Failing to play most HTML5 videos

[Ricardo Wurmus]

Pierre Neidhardt <mail@ambrevar.xyz> writes:

> Hey,
>
> since a general update a week ago or so, it seems that I'm unable to
> play most HTML5 videos.  Youtube works.
> imdb.com fails, and so do most other websites with a similar error.
>
> Did something broke with gstreamer / gst-plugins?

Here’s what I tried:

--8<---------------cut here---------------start------------->8---
$ GST_DEBUG=2 eolie https://old.reddit.com/r/funny/comments/a53e07/finally_redone_correctly/
[INFO] 2018-12-11 09:11:25 You need to set MOZ_PLUGIN_PATH to use plugins
0:00:08.868869189  6188      0x126cf20 WARN                 qtdemux qtdemux_types.c:233:qtdemux_type_get: unknown QuickTime node type trep
0:00:08.868943452  6188      0x126cf20 WARN                 qtdemux qtdemux_types.c:233:qtdemux_type_get: unknown QuickTime node type pasp
0:00:09.618668035  6188 0x7fc9a814e5e0 WARN             curlhttpsrc gstcurlhttpsrc.c:1068:gst_curl_http_src_handle_response:<curlhttpsrc0> Curl failed the transfer (60): SSL peer certificate or SSH remote key was not OK
0:00:09.618810492  6188 0x7fc9a814e5e0 WARN                 basesrc gstbasesrc.c:3055:gst_base_src_loop:<curlhttpsrc0> error: Internal data stream error.
0:00:09.618871820  6188 0x7fc9a814e5e0 WARN                 basesrc gstbasesrc.c:3055:gst_base_src_loop:<curlhttpsrc0> error: streaming stopped, reason error (-5)
0:00:09.619011634  6188 0x7fc9a814e5e0 WARN           uridownloader gsturidownloader.c:242:gst_uri_downloader_bus_handler:<uridownloader0> Received error: Internal data stream error. from curlhttpsrc0, the download will be cancelled
0:00:09.619497097  6188      0x1205f70 WARN                hlsdemux gsthlsdemux.c:655:gst_hls_demux_process_manifest:<hlsdemux0> error: Could not fetch media playlist: Internal data stream error.: gstbasesrc.c(3055): gst_base_src_loop (): /GstCurlHttpSrc:curlhttpsrc0:
streaming stopped, reason error (-5)

0:00:09.619593010  6188      0x1205f70 WARN           adaptivedemux gstadaptivedemux.c:677:gst_adaptive_demux_sink_event:<hlsdemux0> error: Invalid manifest.
0:00:09.746622376  6188       0xf9c830 ERROR      webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1180:handleMessage: Error 1: GStreamer encountered a general stream error. (url=webkit+https://v.redd.it/htlleai2qk321/HLSPlaylist.m3u8)
--8<---------------cut here---------------end--------------->8---

This is a good hint: “Curl failed the transfer (60): SSL peer
certificate or SSH remote key was not OK”.  Gstreamer probably uses
libcurl, which does not honour any environment variables by default.  We
may have to patch this to allow users to override the location of the
cert bundle.

-- 
Ricardo

Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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Thanks for this, Ricardo.

On my end, I get another, very different issue with Next:

--8<---------------cut here---------------start------------->8---
 ** Message: 18:18:48.587: Method parameter(s): 0, Next - Finally redone correctly. : funny - https://old.reddit.com/r/funny/comments/a53e07/finally_redone_correctly/
0:00:02.051478122 .[332m14317.[00m 0x7f76e8004100 .[33;01mWARN   .[00m .[00;01;36m  GST_PLUGIN_LOADING gstplugin.c:792:_priv_gst_plugin_load_file_for_registry:.[00m module_open failed: /home/ambrevar/.guix-profile/lib/gstreamer-1.0/libgstcoreelements.so: undefined symbol: gst_type_find_helper_get_range_full

(WebKitWebProcess:14317): GStreamer-WARNING **: 18:18:49.129: Failed to load plugin '/home/ambrevar/.guix-profile/lib/gstreamer-1.0/libgstcoreelements.so': /home/ambrevar/.guix-profile/lib/gstreamer-1.0/libgstcoreelements.so: undefined symbol: gst_type_find_helper_get_range_full
0:00:02.051531648 .[332m14317.[00m 0x7f76e8004100 .[33;01mWARN   .[00m .[00;01;36m  GST_PLUGIN_LOADING gstplugin.c:1329:gst_plugin_load_by_name:.[00m load_plugin error: Opening module failed: /home/ambrevar/.guix-profile/lib/gstreamer-1.0/libgstcoreelements.so: undefined symbol: gst_type_find_helper_get_range_full
0:00:02.051536679 .[332m14317.[00m 0x7f76e8004100 .[33;01mWARN   .[00m .[00;01;36m  GST_PLUGIN_LOADING gstpluginfeature.c:133:gst_plugin_feature_load:.[00m Failed to load plugin containing feature 'funnel'.
0:00:02.051564072 .[332m14317.[00m 0x7f76e8004100 .[33;01mWARN   .[00m .[00;01;37;41m GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create:<funnel>.[00m loading plugin containing feature (null) returned NULL!

(WebKitWebProcess:14317): GStreamer-CRITICAL **: 18:18:49.129: gst_bin_add: assertion 'GST_IS_ELEMENT (element)' failed

(WebKitWebProcess:14317): GStreamer-CRITICAL **: 18:18:49.129: gst_element_get_static_pad: assertion 'GST_IS_ELEMENT (element)' failed

(WebKitWebProcess:14317): GStreamer-CRITICAL **: 18:18:49.129: gst_ghost_pad_new: assertion 'GST_IS_PAD (target)' failed

(WebKitWebProcess:14317): GStreamer-CRITICAL **: 18:18:49.129: gst_element_add_pad: assertion 'GST_IS_PAD (pad)' failed
--8<---------------cut here---------------end--------------->8---

Looks like the plugins don't match the core.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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With Epiphany:

--8<---------------cut here---------------start------------->8---
> env GST_DEBUG=2 epiphany https://old.reddit.com/r/funny/comments/a53e07/finally_redone_correctly/

(epiphany:6890): Gtk-WARNING **: 18:30:45.075: Could not find the icon 'ephy-bookmarks-symbolic-ltr'. The 'hicolor' theme
was not found either, perhaps you need to install it.
You can get a copy from:
	http://icon-theme.freedesktop.org/releases
 ** Message: 18:30:45.167: Remote error from secret service: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.secrets was not provided by any .service files

 ** (WebKitWebProcess:6908): WARNING **: 18:30:45.167: Failed to search secrets in password schema: The name org.freedesktop.secrets was not provided by any .service files
0:00:02.423776399  6908       0xde0850 WARN                 qtdemux qtdemux_types.c:233:qtdemux_type_get: unknown QuickTime node type trep
0:00:02.423834800  6908       0xde0850 WARN                 qtdemux qtdemux_types.c:233:qtdemux_type_get: unknown QuickTime node type pasp
0:00:02.427741230  6908       0xde0850 WARN            uridecodebin gsturidecodebin.c:921:unknown_type_cb:<uridecodebin1> warning: No decoder available for type 'video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)3, profile=(string)main, codec_data=(buffer)014d401effe10017674d401eeca1e3f60220000003002000000781e2c5b2c001000468efb2c8, width=(int)240, height=(int)240, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true'.
0:00:02.427904432  6908       0xde0850 WARN               decodebin gstdecodebin2.c:4640:gst_decode_bin_expose:<decodebin1> error: no suitable plugins found:
Missing decoder: H.264 (Main Profile) (video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)3, profile=(string)main, codec_data=(buffer)014d401effe10017674d401eeca1e3f60220000003002000000781e2c5b2c001000468efb2c8, width=(int)240, height=(int)240, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true)

0:00:02.427978200  6908       0xde0850 WARN            uridecodebin gsturidecodebin.c:988:no_more_pads_full:<uridecodebin1> error: no suitable plugins found:
gstdecodebin2.c(4640): gst_decode_bin_expose (): /GstPlayBin:play_0x7f9bd43ca000/GstURIDecodeBin:uridecodebin1/GstDecodeBin:decodebin1:
no suitable plugins found:
Missing decoder: H.264 (Main Profile) (video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)3, profile=(string)main, codec_data=(buffer)014d401effe10017674d401eeca1e3f60220000003002000000781e2c5b2c001000468efb2c8, width=(int)240, height=(int)240, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true)

0:00:02.430424060  6908       0xde0850 WARN                 qtdemux qtdemux.c:6073:gst_qtdemux_loop:<qtdemux0> error: Internal data stream error.
0:00:02.430518418  6908       0xde0850 WARN                 qtdemux qtdemux.c:6073:gst_qtdemux_loop:<qtdemux0> error: streaming stopped, reason not-linked (-1)
0:00:02.444056430  6908       0xdc3320 WARN             curlhttpsrc gstcurlhttpsrc.c:1068:gst_curl_http_src_handle_response:<curlhttpsrc0> Curl failed the transfer (60): SSL peer certificate or SSH remote key was not OK
0:00:02.444091392  6908       0xdc3320 WARN                 basesrc gstbasesrc.c:3055:gst_base_src_loop:<curlhttpsrc0> error: Internal data stream error.
0:00:02.444098767  6908       0xdc3320 WARN                 basesrc gstbasesrc.c:3055:gst_base_src_loop:<curlhttpsrc0> error: streaming stopped, reason error (-5)
0:00:02.444128776  6908       0xdc3320 WARN           uridownloader gsturidownloader.c:242:gst_uri_downloader_bus_handler:<uridownloader0> Received error: Internal data stream error. from curlhttpsrc0, the download will be cancelled
0:00:02.444236237  6908      0x13928f0 WARN                hlsdemux gsthlsdemux.c:655:gst_hls_demux_process_manifest:<hlsdemux0> error: Could not fetch media playlist: Internal data stream error.: gstbasesrc.c(3055): gst_base_src_loop (): /GstCurlHttpSrc:curlhttpsrc0:
streaming stopped, reason error (-5)

0:00:02.444285924  6908      0x13928f0 WARN           adaptivedemux gstadaptivedemux.c:677:gst_adaptive_demux_sink_event:<hlsdemux0> error: Invalid manifest.
0:00:02.509856463  6908 0x7f9bc4004d60 ERROR      webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1180:handleMessage: Error 1: GStreamer encountered a general stream error. (url=webkit+https://v.redd.it/htlleai2qk321/HLSPlaylist.m3u8)
0:00:02.510754376  6908 0x7f9bc4004d60 ERROR      webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1180:handleMessage: Error 12: Your GStreamer installation is missing a plug-in. (url=webkit+https://v.redd.it/htlleai2qk321/DASH_600_K)
0:00:02.512161307  6908 0x7f9bc4004d60 WARN          downloadbuffer gstdownloadbuffer.c:961:gst_download_buffer_close_temp_location_file:<downloadbuffer0> Failed to remove temporary file /var/tmp/WebKit-Media-XDCKTZ: No such file or directory

(epiphany:6890): GLib-GIO-CRITICAL **: 18:30:52.172: g_dbus_connection_call_internal: assertion 'object_path != NULL && g_variant_is_object_path (object_path)' failed
--8<---------------cut here---------------end--------------->8---

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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My "next" test is built against WebKitGTK 2.22.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Ricardo Wurmus]

Pierre Neidhardt <mail@ambrevar.xyz> writes:

> With Epiphany: […]
> 0:00:02.444056430  6908       0xdc3320 WARN             curlhttpsrc gstcurlhttpsrc.c:1068:gst_curl_http_src_handle_response:<curlhttpsrc0> Curl failed the transfer (60): SSL peer certificate or SSH remote key was not OK

That’s the same error I got.  It may be worth checking if we can patch
gstcurlhttpsrc.c to ensure that the path of the certificate bundle is
set via environment variable.

A hack to check that this is indeed the cause might be to place the cert
bundle in the expected default location that libcurl uses when the
client does not specify a location.

--
Ricardo

Re: WebKit: Failing to play most HTML5 videos

[Ricardo Wurmus]

Ricardo Wurmus <rekado@elephly.net> writes:

> Pierre Neidhardt <mail@ambrevar.xyz> writes:
>
>> With Epiphany: […]
>> 0:00:02.444056430  6908       0xdc3320 WARN             curlhttpsrc gstcurlhttpsrc.c:1068:gst_curl_http_src_handle_response:<curlhttpsrc0> Curl failed the transfer (60): SSL peer certificate or SSH remote key was not OK
>
> That’s the same error I got.  It may be worth checking if we can patch
> gstcurlhttpsrc.c to ensure that the path of the certificate bundle is
> set via environment variable.
>
> A hack to check that this is indeed the cause might be to place the cert
> bundle in the expected default location that libcurl uses when the
> client does not specify a location.

Here’s a little patch to confirm that indeed this problem is caused by
gstcurlhttpsrc.c (of gst-plugins-bad) not configuring libcurl to look
for certificates in the right place:

--8<---------------cut here---------------start------------->8---
diff --git a/gnu/packages/gstreamer.scm b/gnu/packages/gstreamer.scm
index f43a0fc2f..7a39e6653 100644
--- a/gnu/packages/gstreamer.scm
+++ b/gnu/packages/gstreamer.scm
@@ -286,7 +286,15 @@ developers consider to have good quality code and correct functionality.")
        #:configure-flags
        (list (string-append "--with-html-dir="
                             (assoc-ref %outputs "doc")
-                            "/share/gtk-doc/html"))))
+                            "/share/gtk-doc/html"))
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'foo
+           (lambda _
+             (substitute* "ext/curl/gstcurlhttpsrc.c"
+               (("source->custom_ca_file = NULL;")
+                "source->custom_ca_file = \"/etc/ssl/certs/ca-certificates.crt\";"))
+             #t)))))
     (propagated-inputs
      `(("gst-plugins-base" ,gst-plugins-base)))
     (native-inputs
--8<---------------cut here---------------end--------------->8---

With this patch and gst-plugins-bad installed I do see the video when
using this command:

    GST_DEBUG=2 eolie https://old.reddit.com/r/funny/comments/a53e07/finally_redone_correctly/

Can you confirm this?

--
Ricardo

Re: WebKit: Failing to play most HTML5 videos

[Ricardo Wurmus]

Ricardo Wurmus <rekado@elephly.net> writes:

> Ricardo Wurmus <rekado@elephly.net> writes:
>
>> Pierre Neidhardt <mail@ambrevar.xyz> writes:
>>
>>> With Epiphany: […]
>>> 0:00:02.444056430  6908       0xdc3320 WARN             curlhttpsrc gstcurlhttpsrc.c:1068:gst_curl_http_src_handle_response:<curlhttpsrc0> Curl failed the transfer (60): SSL peer certificate or SSH remote key was not OK
>>
>> That’s the same error I got.  It may be worth checking if we can patch
>> gstcurlhttpsrc.c to ensure that the path of the certificate bundle is
>> set via environment variable.
>>
>> A hack to check that this is indeed the cause might be to place the cert
>> bundle in the expected default location that libcurl uses when the
>> client does not specify a location.
>
> Here’s a little patch to confirm that indeed this problem is caused by
> gstcurlhttpsrc.c (of gst-plugins-bad) not configuring libcurl to look
> for certificates in the right place: […]

I should note that gstcurlhttpsrc.c has a mechanism to set the location
of the ca-certificates.crt file:

--8<---------------cut here---------------start------------->8---
  g_object_class_install_property (gobject_class, PROP_SSL_CA_FILE,
      g_param_spec_string ("ssl-ca-file", "SSL CA File",
          "Location of an SSL CA file to use for checking SSL certificates",
          GSTCURL_HANDLE_DEFAULT_CURLOPT_CAINFO,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
--8<---------------cut here---------------end--------------->8---

I just don’t know how we could possibly provide a value for this
property as we don’t call the plugin on the command line.  It would be
nicer, of course, if we could use this mechanism instead of using a
patch similar to what I showed in my previous email.

--
Ricardo

Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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OK, I had time to try your patch.  It does fix the certificate issue indeed, but
it turns out that it might not be the problem.  See:

--8<---------------cut here---------------start------------->8---
> *env GST_DEBUG=2 vimb https://old.reddit.com/r/funny/comments/a53e07/finally_redone_correctly/
GLib-GIO-Message: 11:19:33.864: Using the 'memory' GSettings backend.  Your settings will not be saved or shared with other applications.
0:00:00.643276212 21838      0x145ae80 WARN            uridecodebin gsturidecodebin.c:921:unknown_type_cb:<uridecodebin0> warning: No decoder available for type 'video/x-h264, stream-format=(string)byte-stream, alignment=(string)nal, parsed=(boolean)true'.
0:00:00.643406496 21838      0x145ae80 WARN               decodebin gstdecodebin2.c:4640:gst_decode_bin_expose:<decodebin0> error: no suitable plugins found:
Missing decoder: H.264 (video/x-h264, stream-format=(string)byte-stream, alignment=(string)nal, parsed=(boolean)true)

0:00:00.643445113 21838      0x145ae80 WARN            uridecodebin gsturidecodebin.c:988:no_more_pads_full:<uridecodebin0> error: no suitable plugins found:
gstdecodebin2.c(4640): gst_decode_bin_expose (): /GstPlayBin:play/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0:
no suitable plugins found:
Missing decoder: H.264 (video/x-h264, stream-format=(string)byte-stream, alignment=(string)nal, parsed=(boolean)true)

0:00:00.655680097 21838 0x7fc568069e30 WARN                   queue gstqueue.c:1566:gst_queue_loop:<queue2> error: Internal data stream error.
0:00:00.655701969 21838 0x7fc568069e30 WARN                   queue gstqueue.c:1566:gst_queue_loop:<queue2> error: streaming stopped, reason not-linked (-1)
0:00:00.655740424 21838 0x7fc568069e30 WARN           adaptivedemux gstadaptivedemux.c:876:gst_adaptive_demux_handle_message:<hlsdemux0:src_0> Source posted error: 3626:1 Internal data stream error. (gstqueue.c(1566): gst_queue_loop (): /GstPlayBin:play/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstHLSDemux:hlsdemux0/GstBin:srcbin-src_0/GstQueue:queue2:
streaming stopped, reason not-linked (-1))
0:00:00.655854401 21838 0x7fc568069720 WARN           adaptivedemux gstadaptivedemux.c:3818:gst_adaptive_demux_stream_download_loop:<hlsdemux0> error: Internal data stream error.
0:00:00.655867008 21838 0x7fc568069720 WARN           adaptivedemux gstadaptivedemux.c:3818:gst_adaptive_demux_stream_download_loop:<hlsdemux0> error: streaming stopped, reason not-linked (-1)
0:00:00.661742678 21838 0x7fc568069e80 WARN                 qtdemux qtdemux_types.c:233:qtdemux_type_get: unknown QuickTime node type trep
0:00:00.661760483 21838 0x7fc568069e80 WARN                 qtdemux qtdemux_types.c:233:qtdemux_type_get: unknown QuickTime node type pasp
0:00:00.921014742 21838 0x7fc568069e80 WARN            uridecodebin gsturidecodebin.c:921:unknown_type_cb:<uridecodebin1> warning: No decoder available for type 'video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)3, profile=(string)main, codec_data=(buffer)014d401effe10017674d401eeca1e3f60220000003002000000781e2c5b2c001000468efb2c8, width=(int)240, height=(int)240, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true'.
0:00:00.922072199 21838 0x7fc568069e80 WARN               decodebin gstdecodebin2.c:4640:gst_decode_bin_expose:<decodebin1> error: no suitable plugins found:
Missing decoder: H.264 (Main Profile) (video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)3, profile=(string)main, codec_data=(buffer)014d401effe10017674d401eeca1e3f60220000003002000000781e2c5b2c001000468efb2c8, width=(int)240, height=(int)240, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true)

0:00:00.922217740 21838 0x7fc568069e80 WARN            uridecodebin gsturidecodebin.c:988:no_more_pads_full:<uridecodebin1> error: no suitable plugins found:
gstdecodebin2.c(4640): gst_decode_bin_expose (): /GstPlayBin:play/GstURIDecodeBin:uridecodebin1/GstDecodeBin:decodebin1:
no suitable plugins found:
Missing decoder: H.264 (Main Profile) (video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)3, profile=(string)main, codec_data=(buffer)014d401effe10017674d401eeca1e3f60220000003002000000781e2c5b2c001000468efb2c8, width=(int)240, height=(int)240, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true)

0:00:00.925297299 21838 0x7fc568069e80 WARN                 qtdemux qtdemux.c:6073:gst_qtdemux_loop:<qtdemux0> error: Internal data stream error.
0:00:00.925372803 21838 0x7fc568069e80 WARN                 qtdemux qtdemux.c:6073:gst_qtdemux_loop:<qtdemux0> error: streaming stopped, reason not-linked (-1)
0:00:01.227826788 21838      0x11508a0 ERROR      webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:956:handleMessage: Error 12: Your GStreamer installation is missing a plug-in. (url=webkit+https://v.redd.it/htlleai2qk321/HLSPlaylist.m3u8)
0:00:01.227848902 21838      0x11508a0 WARN       webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1860:loadingFailed: Loading failed, error: 4
0:00:01.228134028 21838      0x11508a0 ERROR      webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:956:handleMessage: Error 12: Your GStreamer installation is missing a plug-in. (url=webkit+https://v.redd.it/htlleai2qk321/DASH_600_K)
0:00:01.228145779 21838      0x11508a0 WARN       webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1860:loadingFailed: Loading failed, error: 4
0:00:01.228846796 21838      0x11508a0 WARN          downloadbuffer gstdownloadbuffer.c:961:gst_download_buffer_close_temp_location_file:<downloadbuffer0> Failed to remove temporary file /var/tmp/WebKit-Media-UK76TZ: No such file or directory
--8<---------------cut here---------------end--------------->8---

So I think we are simply not building Gstreamer(-plugins-*) against some
important codecs, namely x264.

Does anyone know more about this?

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Ricardo Wurmus]

Pierre Neidhardt <mail@ambrevar.xyz> writes:

> OK, I had time to try your patch.  It does fix the certificate issue indeed, but
> it turns out that it might not be the problem. […]

What plugins do you have?
gst-libav does support x264 IIRC.

-- 
Ricardo

Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

[-- Attachment #1: Type: text/plain, Size: 1233 bytes --]

I have all of it.

libx264 is linked in gst-plugins-ugly.

I found some more information here:

https://gstreamer.freedesktop.org/documentation/tutorials/basic/gstreamer-tools.html
https://stackoverflow.com/questions/17096139/your-gstreamer-installation-is-missing-a-plug-in-gsturidecodebin

Then I tried this:

--8<---------------cut here---------------start------------->8---
> gst-launch-1.0 -v uridecodebin uri=https://old.reddit.com/r/funny/comments/a53e07/finally_redone_correctly/
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0: source = "\(GstCurlHttpSrc\)\ source"
ERROR: from element /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstCurlHttpSrc:source: Internal data stream error.
Additional debug info:
gstbasesrc.c(3055): gst_base_src_loop (): /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstCurlHttpSrc:source:
streaming stopped, reason error (-5)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...
--8<---------------cut here---------------end--------------->8---

Which is precisely what your patch is trying to fix.  Hmm...

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Ricardo Wurmus]

Pierre Neidhardt <mail@ambrevar.xyz> writes:

> I have all of it.
>
> libx264 is linked in gst-plugins-ugly.
>
> I found some more information here:
>
> https://gstreamer.freedesktop.org/documentation/tutorials/basic/gstreamer-tools.html
> https://stackoverflow.com/questions/17096139/your-gstreamer-installation-is-missing-a-plug-in-gsturidecodebin
>
> Then I tried this:
>
> --8<---------------cut here---------------start------------->8---
>> gst-launch-1.0 -v uridecodebin uri=https://old.reddit.com/r/funny/comments/a53e07/finally_redone_correctly/

To be sure that this is not caused by a stale cache, please run this
first:

    rm -rf $HOME/.cache/gstreamer-1.0

This is a class of bugs that we haven’t yet addressed in Guix.  This is
the same for IBus input methods; these caches can go stale and point to
old store items that may have been GC’d already.

Please also append “--gst-debug-level=4” to get some more information.

-- 
Ricardo

Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

[-- Attachment #1: Type: text/plain, Size: 151 bytes --]

You are right, this was it!  Thank you so much!

So, what about your patch now?  Shall we merge it?

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Ricardo Wurmus]

Pierre Neidhardt <mail@ambrevar.xyz> writes:

> You are right, this was it!  Thank you so much!
>
> So, what about your patch now?  Shall we merge it?

The patch is a bit crude.  We shouldn’t hard-code the location of the
cert bundle.  Instead we should run getenv to get the location from one
of the common environment variables and only fall back to
“/etc/ssl/certs/ca-certificates.crt” if it isn’t set.

Would you like to change the patch to accomplish this?  Please present
it here before pushing it.

Another thing: I found that my browser tab freezes when a video rewinds
to loop.  I have gst-libav installed (in addition to all the
“gst-plugins-*” packages), so that may be responsible here.

--
Ricardo

Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

[-- Attachment #1: Type: text/plain, Size: 769 bytes --]


> Instead we should run getenv to get the location from one
> of the common environment variables and only fall back to
> “/etc/ssl/certs/ca-certificates.crt” if it isn’t set.

You mean add getenv in C, right?

Wouldn't there be a way with environment variables though?  From an executable
wrapper, or maybe in ./etc/profile.

> Would you like to change the patch to accomplish this?  Please present
> it here before pushing it.

Sure.

> Another thing: I found that my browser tab freezes when a video rewinds
> to loop.  I have gst-libav installed (in addition to all the
> “gst-plugins-*” packages), so that may be responsible here.

I have the same issue.
Which browser are you using?

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Ricardo Wurmus]

Pierre Neidhardt <mail@ambrevar.xyz> writes:

>> Instead we should run getenv to get the location from one
>> of the common environment variables and only fall back to
>> “/etc/ssl/certs/ca-certificates.crt” if it isn’t set.
>
> You mean add getenv in C, right?

Yes.

> Wouldn't there be a way with environment variables though?  From an executable
> wrapper, or maybe in ./etc/profile.

I haven’t looked if that’s possible.  Users of libcurl are supposed to
set the location of the cert bundle or else have to use the default for
*libcurl* provided at configure time.

This plugin does have a knob to override the location, but I don’t know
how to turn it.  It looks like it’s used as a command line argument, but
nobody uses this plugin on the command line.

If you can find a way that doesn’t involve patching in a getenv call I’d
be happier, but if we can’t figure out another way and the alternative
is to have a broken plugin I’d rather go down the getenv route.

What do you think?

>> Another thing: I found that my browser tab freezes when a video rewinds
>> to loop.  I have gst-libav installed (in addition to all the
>> “gst-plugins-*” packages), so that may be responsible here.
>
> I have the same issue.
> Which browser are you using?

I used epiphany for the test.

--
Ricardo

Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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Acknowledged.  I'll investigate then.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

[-- Attachment #1: Type: text/plain, Size: 2072 bytes --]

I've investigated some bits. 

gst-plugins-bad uses the CURLOPT_CAPATH and CURLOPT_CAINFO environment variables
to find the certificate.
Ricardo, do you know some other knobs?

Looking at existing Guix packages, I found those:

- Curl:

--8<---------------cut here---------------start------------->8---
    ;; Note: This search path is respected by the `curl` command-line tool only.
    ;; Ideally we would bake this into libcurl itself so other users can benefit,
    ;; but it's not supported upstream due to thread safety concerns.
    (list (search-path-specification
           (variable "CURL_CA_BUNDLE")
           (file-type 'regular)
           (separator #f)                         ;single entry
           (files '("etc/ssl/certs/ca-certificates.crt"))))
--8<---------------cut here---------------end--------------->8---

- Feh:

--8<---------------cut here---------------start------------->8---
    (native-search-paths
     ;; Feh allows overriding the libcurl builtin CA path (unset in Guix)
     ;; with the same variable as the `curl` command line HTTP tool.
     (package-native-search-paths curl))
--8<---------------cut here---------------end--------------->8---

- Octave-cli

--8<---------------cut here---------------start------------->8---
    ;; Octave code uses this variable to detect directories holding multiple CA
    ;; certificates to verify peers with.  This is required for the networking
    ;; functions that require encryption to work properly.
    (native-search-paths
     (list (search-path-specification
            (variable "CURLOPT_CAPATH")
            (files '("etc/ssl/certs")))))
--8<---------------cut here---------------end--------------->8---

So my best bet would be to add the aforementioned variables to curl, and then do
a:

    (native-search-paths
     (package-native-search-paths curl))
     
from gst-plugins-bad or, if it does not work, from the individual web browsers.

I'll test this and report.

Thoughts?

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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Weird, I've re-installed the original gst-plugins-bad and I've deleted
~/.cache/gstreamer-1* but it keeps playing normally.  I can't reproduce the
issue.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[swedebugia]

On 2019-01-14 15:22, Pierre Neidhardt wrote:
> Weird, I've re-installed the original gst-plugins-bad and I've deleted
> ~/.cache/gstreamer-1* but it keeps playing normally.  I can't reproduce the
> issue.

On vanilla 0.16 64bit I can play these videoes in icecat:
https://vimeo.com/ondemand/ibelieveicanfly/81591839
https://www.dr.dk/tv/se/peitersen-og-feldthaus/peitersen-og-feldthause/peitersen-og-feldthaus-2-5-2#!/02:13

Svtplay.se does not work in the browser for some reason, but with mpv
videos play fine:
https://www.svtplay.se/video/20630456/mannen-under-trappan/mannen-under-trappan-sasong-1-avsnitt-1
 (+) Video --vid=1 (*) (h264 1280x720)
 (+) Audio --aid=1 (*) 'DASH audio' (aac 2ch 48000Hz) (external)
     Subs  --sid=1 --slang=sv 'vtt' (webvtt) (external)
AO: [pulse] 48000Hz stereo 2ch float
VO: [gpu] 1280x720 yuv420p

I have no gst-* package installed:

sdb@antelope ~$ gp -l |grep -v Gene
 
emacs-paredit	24	out	/gnu/store/1zha5anxg029qfl7r569aap5lfyrb66a-emacs-paredit-24
 
emacs-no-x	26.1	out	/gnu/store/9v7m3c83rm1rgi99ph5xdkpnnd0c62x4-emacs-no-x-26.1
 
setxkbmap	1.3.1	out	/gnu/store/3px1119mhx9q7xzmi5jlg5wylhkx84cr-setxkbmap-1.3.1
  git	2.19.2	out	/gnu/store/iffgahfxnk13narndlaqf9xm0yhyhyyv-git-2.19.2

 +
lynx	2.8.9rel.1	out	/gnu/store/nziwhxiknf28ap5z0wgmyrm0ds84a0pf-lynx-2.8.9rel.1
 +
screen	4.6.2	out	/gnu/store/xrb73jf6ffv5gm4dc6fili7vr6nahhfz-screen-4.6.2

 +
libgcrypt	1.8.3	out	/gnu/store/87fdwmippyfs01870x5hq7v2lcyfczpi-libgcrypt-1.8.3

 + mc	4.8.20	out	/gnu/store/glxbmvcj3kza3cdabfrdmd4wr4zvm4xa-mc-4.8.20

 + file	5.33	out	/gnu/store/wb03gzlrxs8ihrmn9cdxv9r16iyl7x6m-file-5.33

 + ccache	3.5	out	/gnu/store/367qmfdrsi2hi9ibvbqik1zpcrnpq2kh-ccache-3.5

 +
gnupg	2.2.11	out	/gnu/store/x1nd7dazhbc3s0lrpf6ap3ilqy0q4p2x-gnupg-2.2.11

 +
android-udev-rules	20180112	out	/gnu/store/flc82b0g7193kfgcc1ddd5fpfdk0dkd2-android-udev-rules-20180112

 +
alsa-utils	1.1.6	out	/gnu/store/hwshd31clxqlaia041cysp0pfgfw9k3j-alsa-utils-1.1.6

 +
emacs-debbugs	0.16	out	/gnu/store/arnli7acr106p4p490z1wg9f5fb0hsfd-emacs-debbugs-0.16

 +
emacs-magit	2.13.0	out	/gnu/store/lbxc9l8b1b843w84lqswal27dvry92qp-emacs-magit-2.13.0

 + lzip	1.20	out	/gnu/store/2kwysbg8f175gmqmsd5kjggmy6hvxi5k-lzip-1.20

 +
zlib	1.2.11	out	/gnu/store/nq4lsyipmfb0q7g26ra45rwwqrh3x8zw-zlib-1.2.11
 +
ncurses	6.1	out	/gnu/store/4h03mp5nggsblscs6j0n7s6sbpfy6kxh-ncurses-6.1
 +
ninja	1.8.2	out	/gnu/store/cjg91bd3szl9zj8ymyllig92jah7jln5-ninja-1.8.2

 + make	4.2.1	out	/gnu/store/p62f90him5qvm4f1zaqyrhdwkqxqj2c4-make-4.2.1

 +
cmake	3.12.2	out	/gnu/store/1amd2s1n83kzkl590p6l0j56qbppz50d-cmake-3.12.2

 + gcc	8.2.0	out	/gnu/store/px8nkcmr1bp76mhfm2lbzz2h3n9wfbz5-gcc-8.2.0

 +
docbook-xsl	1.79.1	out	/gnu/store/agq4fnja1mlywp6iqhfvlfvi5m9377wa-docbook-xsl-1.79.1
 +
docbook-xml	4.5	out	/gnu/store/n837qp708wbvqf8yv9f4rdf1qqnlxs3b-docbook-xml-4.5

 +
libxml2	2.9.8	out	/gnu/store/l2f5m536i38z1403fyxjnrbrfk6d9xqb-libxml2-2.9.8

 +
libxslt	1.1.32	out	/gnu/store/d873smkv345rsb5bj3db0qj225lsl9gs-libxslt-1.1.32

 +
evince	3.28.2	out	/gnu/store/nrkzk9hb243r10828snw5fzr8wh7b8j1-evince-3.28.2
 + zip	3.0	out	/gnu/store/f8fvjnqz091053099wghflw4gbrphqcr-zip-3.0

 +
wget	1.19.5	out	/gnu/store/jic99a7c275g4lv8bc8mxigzw6c9b0h4-wget-1.19.5

 +
icecat	60.3.0-gnu1	out	/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1

 +
graphviz	2.40.1	out	/gnu/store/155d09rr27fj9wjcajn4d2rmvwsn3hwx-graphviz-2.40.1

 +
font-gnu-freefont-ttf	20120503	out	/gnu/store/w5jl7bvk86srfawxyfsg2n4b11zwwnfy-font-gnu-freefont-ttf-20120503

 +
workrave	1.10.21	out	/gnu/store/bli5m4m8hvkkhrphv13qkgyln7zghzvs-workrave-1.10.21

 +
youtube-dl	2018.11.07	out	/gnu/store/20wr2z2qnm36mwcdmmzpsvr9f4899gc9-youtube-dl-2018.11.07
 +
xfce4-clipman-plugin	1.2.6	out	/gnu/store/ja8sv7jmpvdn6bs264p3xxbzlkqxi2il-xfce4-clipman-plugin-1.2.6
 +
xfce4-taskmanager	1.1.0	out	/gnu/store/7s67w5pd7v5g3wyrvrc8ikqinlvbaa6w-xfce4-taskmanager-1.1.0

 +
nload	0.7.4	out	/gnu/store/4596mpsg2w7zmv8zz0ln1qn8pq80bkk7-nload-0.7.4

 +
strace	4.25	out	/gnu/store/jwsi74vkwb3y32w7hbnxsbssi0fp73l8-strace-4.25

 + emacs	26.1	out	/gnu/store/gppr8msvzgxr87psbj3w6hc07lnnzpvx-emacs-26.1

 +
emacs-atom-one-dark-theme	0.4.0-0.1f1185b	out	/gnu/store/mlxnvrkgmiaf5jr1afp1dswwnn0jq4w1-emacs-atom-one-dark-theme-0.4.0-0.1f1185b

 +
node-test	0.6.0	out	/gnu/store/y32myp8pdraqk6iay4advvwlfdqlh4g0-node-test-0.6.0

 +
node-minimist	1.2.0	out	/gnu/store/dcl9qs1p2ckqjqhczj44gaasfmsljqgl-node-minimist-1.2.0

 +
guile-readline	2.2.4	out	/gnu/store/2fsg1jl3hwxnak9h39f6vzx87hp48dsm-guile-readline-2.2.4

 +
node-semver	5.6.0	out	/gnu/store/kqp94lm2gnrrck8mmgk2s20lpnxngj15-node-semver-5.6.0

 + mpv	0.29.1	out	/gnu/store/98mfmg8ig0pzg06n252km4nil7rzpzls-mpv-0.29.1

 +
pavucontrol	3.0	out	/gnu/store/w64idpi253b6p7jhcmsxyghglvlgil4j-pavucontrol-3.0

 +
emacs-guix	0.5	out	/gnu/store/0db00065vhmy5qkpkgrnvxhxrc0mbp6z-emacs-guix-0.5

 +
openssh	7.9p1	out	/gnu/store/f9xad574zlhpgr97kl4xzvg1vlnr7yps-openssh-7.9p1

 +
emacs-bbdb	3.1.2	out	/gnu/store/9s774yrqi1c7dfsh2hba022vfqbb1swg-emacs-bbdb-3.1.2
 +
emacs-emojify	0.4	out	/gnu/store/kwfibj4s5wcr0m0m57fwvhjqpzlyjwrg-emacs-emojify-0.4

Should we close this bug?

-- 
Cheers 
Swedebugia

Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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Swedebugia, you might be misunderstood: neighter Icecat not mpv are
WebKit-based, which is at the root of this issue.

If you'd like to test, you should try with, say, eolie, epiphany, vimb or next.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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I can reproduce on a fresh Guix install.
It bugs me that I don't seem to be able to reproduce the issue reliably (I tried
removing the Gstreamer cache).

Anyone else?  

Well, I guess I'll work on a patch then :)

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: WebKit: Failing to play most HTML5 videos

[Pierre Neidhardt]

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I just tried the following in gst-plugins-bad:

--8<---------------cut here---------------start------------->8---

     (build-system gnu-build-system)
+    (native-search-paths
+     ;; Note: This search path is respected by the `curl` command-line tool only.
+     ;; Ideally we would bake this into libcurl itself so other users can benefit,
+     ;; but it's not supported upstream due to thread safety concerns.
+     (list (search-path-specification
+            (variable "CURLOPT_CAPATH")
+            (files '("etc/ssl/certs")))
+           (search-path-specification
+            (variable "CURLOPT_CAINFO")
+            (files '("etc/ssl/certs/ca-certificates.crt")))))
     (arguments
      '(#:tests? #f ; XXX: 13 of 53 tests fail
--8<---------------cut here---------------end--------------->8---

Didn't work :/

Gotta try harder...

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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