From: Leo Famulari <leo@famulari.name>
To: 42607@debbugs.gnu.org
Subject: bug#42607: guix.gnu.org/videos don't play on iOS
Date: Wed, 29 Jul 2020 19:26:57 -0400 [thread overview]
Message-ID: <20200729232657.GA15458@jasmine.lan> (raw)
In-Reply-To: <87eeotaphb.fsf@nckx>
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On Thu, Jul 30, 2020 at 01:08:48AM +0200, Tobias Geerinckx-Rice via Bug reports for GNU Guix wrote:
> nginx can easily sniff iOS/Macintosh user agents and serve them an inferior
> format to match, such as h264 with MP3 audio, which can both be encoded
> using free software in Guix.
Here is where the videos are created:
https://git.savannah.gnu.org/cgit/guix/videos.git/tree/Makefile
------
$(NUMBER).clino.$(VIDEO).webm: \
$(VIDEO)/$(LOCALE_LANG)/durations.txt \
$(VIDEO)/$(LOCALE_LANG)/audios/all.mp3
ffmpeg -y -f concat -vsync cfr \
-i $(VIDEO)/$(LOCALE_LANG)/durations.txt \
-i $(VIDEO)/$(LOCALE_LANG)/audios/all.mp3 \
-c:a libopus -b:a 192k \
-c:v libvpx-vp9 -crf 31 -b:v 0 -pix_fmt yuv420p \
-af apad -shortest \
-vf fps=25 -threads 4 $(VIDEO)/$(LOCALE_LANG)/videos/$@;
make clean_noCli
------
So, we'd need to add a target that did "-c:a copy -c:v libx264" and add
some logic to create two videos instead of one. I didn't look into it
closely yet to see if that will be simple or not.
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next prev parent reply other threads:[~2020-07-29 23:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-29 23:08 bug#42607: guix.gnu.org/videos don't play on iOS Tobias Geerinckx-Rice via Bug reports for GNU Guix
2020-07-29 23:26 ` Leo Famulari [this message]
2021-02-01 20:54 ` Leo Famulari
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