recordmydesktop doesn't work with sound.

recordmydesktop doesn't work with sound.

[Dmitry Nikolaev]

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Hi. I wanted to make a screencast about GuixSD, but recordmydesktop
couldn't record sound. Launching it without parameters gives

Error while opening/configuring soundcard /dev/dsp

Manual page says I could specify sound device

--device SOUND_DEVICE
                  Sound  device(default  hw:0,0  or  /dev/dsp,  depending
on
              whether ALSA or OSS is used).

I've tried both, hw:0,0 and /dev/dsp, none worked.

Meanwhile, I've tried to record my microphone with audacity and succeded,
no configuration requred. By default audacity records from ALSA hw:0,0.

What should I do? Can I solve this issue with JACK, or it wouldn't help
either? Shouldn't recordmydesktop package be recompiled with ALSA support?
I thought it already has it. recordmydesktop is compilled with

(build-system gnu-build-system)

with no options, everything is default.

http://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/video.scm#n1509

recordmydesktop-0.3.8.1/configure --help has a list of otional features

Optional Features:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as
--enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
  --disable-dependency-tracking  speeds up one-time build
  --enable-dependency-tracking   do not reject slow dependency extractors
  --enable-oss=yes    compile with OSS(don't check for ALSA)
  --enable-jack=yes    compile with Jack support

As I can see ALSA is a default option. Why doesn't recordmydesktop in
GuixSD doesn't work with my microphone like audacity does?

Dmitry Nikolaev

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Re: recordmydesktop doesn't work with sound.

[Thompson, David]

Hi Dmitry,

On Thu, Jul 21, 2016 at 3:58 PM, Dmitry Nikolaev <cameltheman@gmail.com> wrote:
> Hi. I wanted to make a screencast about GuixSD, but recordmydesktop couldn't
> record sound.

I don't know the answer to your question, unfortunately, but I wanted
to recommend another tool as a workaround for now: Open Broadcaster
Software.  Install with 'guix package -i obs'.  I like it quite a bit.

- Dave

Re: recordmydesktop doesn't work with sound.

[Catonano]

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2016-07-21 22:21 GMT+02:00 Thompson, David <dthompson2@worcester.edu>:

> Hi Dmitry,
>
> On Thu, Jul 21, 2016 at 3:58 PM, Dmitry Nikolaev <cameltheman@gmail.com>
> wrote:
> > Hi. I wanted to make a screencast about GuixSD, but recordmydesktop
> couldn't
> > record sound.
>
> I don't know the answer to your question, unfortunately, but I wanted
> to recommend another tool as a workaround for now: Open Broadcaster
> Software.  Install with 'guix package -i obs'.  I like it quite a bit.
>
> - Dave
>
>
I second David's suggestion. Even if it worked correctly, RecordMyDesktop
is really unpleasant to use.

When you record something, it needs to "process" your content for a very
long time and such process runs on a single core only

If that goes awry for any reason, you'll have to record again from scratch

Further, last time I used it, it brutally cut the audio of my footage for
no apparent reason.

I'd recommend a tiny Gnome Shell extension called "EasyScreenCast" but I
don't know how that would fare with GuixSD.

If this Open Broadcaster is already available, I'd give it a shot

I'm looking forward to watch your screencast !

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Re: recordmydesktop doesn't work with sound.

[Ludovic Courtès]

Hi,

Dmitry Nikolaev <cameltheman@gmail.com> skribis:

> As I can see ALSA is a default option. Why doesn't recordmydesktop in
> GuixSD doesn't work with my microphone like audacity does?

Maybe we need to add ‘alsa-lib’ as a dependency of ‘recordmydesktop’?

Indeed, the build log currently shows:

--8<---------------cut here---------------start------------->8---
checking alsa/asoundlib.h usability... no
checking alsa/asoundlib.h presence... no
checking for alsa/asoundlib.h... no
--8<---------------cut here---------------end--------------->8---

Feel free to send a patch on guix-devel!  :-)

HTH,
Ludo’.

Re: recordmydesktop doesn't work with sound.

[Efraim Flashner]

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On Thu, Jul 21, 2016 at 10:50:10PM +0200, Catonano wrote:
> 2016-07-21 22:21 GMT+02:00 Thompson, David <dthompson2@worcester.edu>:
> 
> > Hi Dmitry,
> >
> > On Thu, Jul 21, 2016 at 3:58 PM, Dmitry Nikolaev <cameltheman@gmail.com>
> > wrote:
> > > Hi. I wanted to make a screencast about GuixSD, but recordmydesktop
> > couldn't
> > > record sound.
> >
> > I don't know the answer to your question, unfortunately, but I wanted
> > to recommend another tool as a workaround for now: Open Broadcaster
> > Software.  Install with 'guix package -i obs'.  I like it quite a bit.
> >
> > - Dave
> >
> >
> I second David's suggestion. Even if it worked correctly, RecordMyDesktop
> is really unpleasant to use.
> 
> When you record something, it needs to "process" your content for a very
> long time and such process runs on a single core only
> 
> If that goes awry for any reason, you'll have to record again from scratch
> 
> Further, last time I used it, it brutally cut the audio of my footage for
> no apparent reason.
> 
> I'd recommend a tiny Gnome Shell extension called "EasyScreenCast" but I
> don't know how that would fare with GuixSD.
> 
> If this Open Broadcaster is already available, I'd give it a shot

$ guix package -A obs
obs 0.15.1  out gnu/packages/video.scm:1397:2

> 
> I'm looking forward to watch your screencast !

-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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Re: recordmydesktop doesn't work with sound.

[Leo Famulari]

On Fri, Jul 22, 2016 at 02:50:45PM +0200, Ludovic Courtès wrote:
> Dmitry Nikolaev <cameltheman@gmail.com> skribis:
> 
> > As I can see ALSA is a default option. Why doesn't recordmydesktop in
> > GuixSD doesn't work with my microphone like audacity does?
> 
> Maybe we need to add ‘alsa-lib’ as a dependency of ‘recordmydesktop’?
> 
> Indeed, the build log currently shows:
> 
> --8<---------------cut here---------------start------------->8---
> checking alsa/asoundlib.h usability... no
> checking alsa/asoundlib.h presence... no
> checking for alsa/asoundlib.h... no
> --8<---------------cut here---------------end--------------->8---
> 
> Feel free to send a patch on guix-devel!  :-)

Dmitry, let me know if you want to try writing this patch or not. If
not, I'm happy to do it :)

Re: recordmydesktop doesn't work with sound.

[Dmitry Nikolaev]

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On 21 July 2016 at 23:21, Thompson, David <dthompson2@worcester.edu> wrote:

> I don't know the answer to your question, unfortunately, but I wanted
> to recommend another tool as a workaround for now: Open Broadcaster
> Software.  Install with 'guix package -i obs'.  I like it quite a bit.
>

obs didn't worked for me:

error: X Error: GLXBadFBConfig
error: Failed to create OpenGL context.
error: Failed to create context!
error: device_create (GL) failed
error: Failed to initialize video:  Unspecified error


Looks like I need better drivers for my Radeon card.

Dmitry

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Re: recordmydesktop doesn't work with sound.

[Dmitry Nikolaev]

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On 21 July 2016 at 23:50, Catonano <catonano@gmail.com> wrote:

> I second David's suggestion. Even if it worked correctly, RecordMyDesktop
> is really unpleasant to use.
>

It gives crippled video on my hardware. I've tried --full-shot and --fps
options, none helped.


> When you record something, it needs to "process" your content for a very
> long time and such process runs on a single core only
>

My laptop is singlecored, not an issue for me.


> I'd recommend a tiny Gnome Shell extension called "EasyScreenCast" but I
> don't know how that would fare with GuixSD.
>

Doesn't it requires Gnome3? Does GuixSD has it in repository? I would try
it.

Dmitry

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Re: recordmydesktop doesn't work with sound.

[Dmitry Nikolaev]

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On 24 July 2016 at 18:34, Leo Famulari <leo@famulari.name> wrote:

> Dmitry, let me know if you want to try writing this patch or not. If
> not, I'm happy to do it :)
>

Patch is trivial. I would be a good example for my post about writing
patches. Please, let my write a patch and send it.

Dmitry

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Re: recordmydesktop doesn't work with sound.

[Leo Famulari]

On Mon, Jul 25, 2016 at 04:05:22PM +0300, Dmitry Nikolaev wrote:
> On 24 July 2016 at 18:34, Leo Famulari <leo@famulari.name> wrote:
> 
> > Dmitry, let me know if you want to try writing this patch or not. If
> > not, I'm happy to do it :)
> >
> 
> Patch is trivial. I would be a good example for my post about writing
> patches. Please, let my write a patch and send it.

Okay, sounds good :)

Re: recordmydesktop doesn't work with sound.

[Dmitry Nikolaev]

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On 21 July 2016 at 22:58, Dmitry Nikolaev <cameltheman@gmail.com> wrote:

> Hi. I wanted to make a screencast about GuixSD, but recordmydesktop
> couldn't record sound.
>

I've found that ffmpeg is a great solution for screencast recording.

https://trac.ffmpeg.org/wiki/Capture/Desktop

ffmpeg -video_size 1024x768 -framerate 25 -f x11grab -i :0.0+100,200
-f pulse -ac 2 -i default -y output.mkv


Dmitry

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Re: recordmydesktop doesn't work with sound.

[Catonano]

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2016-07-27 22:11 GMT+02:00 Dmitry Nikolaev <cameltheman@gmail.com>:

>
> On 21 July 2016 at 22:58, Dmitry Nikolaev <cameltheman@gmail.com> wrote:
>
>> Hi. I wanted to make a screencast about GuixSD, but recordmydesktop
>> couldn't record sound.
>>
>
> I've found that ffmpeg is a great solution for screencast recording.
>
> https://trac.ffmpeg.org/wiki/Capture/Desktop
>
> ffmpeg -video_size 1024x768 -framerate 25 -f x11grab -i :0.0+100,200 -f pulse -ac 2 -i default -y output.mkv
>
>
>
It is, but it has no GUI. If you're ok with a command line only solution,
go for it !

Don't forget to let us know when your footage is ready !

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