Date: Sat, 30 Apr 2022 15:23:40 -0400 From: Mason Loring Bliss <mason@blisses.org> To: multimedia@freebsd.org Subject: How to do audio with ffmpeg/v4l2/oss? Message-ID: <Ym2MvF2xnjngdbw0@blisses.org>
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Hi all! I do this on Debian to present a video with audio over Jitsi:
ffmpeg -re -ss 00:00:00 -i foo.mp4 \
-map 0:0 -f v4l2 -c:v rawvideo /dev/video100 \
-map 0:1 -f alsa hw:aloop100,1 &
I'd like to do the equivalent on FreeBSD, and on my first pass I got video
working, but not audio. I see the oss filter built into ffmpeg, but I'm not
sure how to point it to a device or what that device might then be. It's
been a while since I tried and this might not be the right video syntax,
but I'm mostly curious about what the right thing to do is for the audio:
ffmpeg -re -ss 00:00:00 -i foo.mp4 \
-map 0:0 -f v4l2 -c:v rawvideo /dev/video100 \
-map 0:1 -f oss [INSERT MAGIC HERE]
Note that I'm not tied to the idea of using ffmpeg for this - it's just
what works on GNU/Linux, and it seems to at least mostly work here.
I'd be grateful for advice.
--=20
Mason Loring Bliss mason@blisses.org Ewige Blumenkraft!
awake ? sleep : random() & 2 ? dream : sleep; -- Hamlet, Act III, Scene I
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