Configure %ffmpeg(%video.copy, %audio.copy, format='flv') not working.

[sorintodys]

Hello,

I try to create an internet tv station application.
When I set up liquidsoap to skip encoding I receive an error.

Code working:

settings.init.allow_root.set(true)
audio.samplerate.set(48000)
audio.channels.set(2)
video.frame.width.set(640)
video.frame.height.set(360)
settings.frame.video.framerate.set(24)
settings.ffmpeg.log.verbosity.set('error')
settings.protocol.ffmpeg.path.set('/var/www/video/ffmpeg')
settings.log.file.path.set('/var/www/video/autodj.log')
mediaplaylist = mksafe(playlist(mode='normal',reload_mode='watch','/var/www/video/media/'))

encoder = %ffmpeg(%video(codec='libx264', b='1024k'), %audio(codec='aac', b='192k'), _format='flv')

output.url(url='rtmp://server:port/live/stream', encoder, mediaplaylist)

Code not working:

settings.init.allow_root.set(true)
audio.samplerate.set(48000)
audio.channels.set(2)
video.frame.width.set(640)
video.frame.height.set(360)
settings.frame.video.framerate.set(24)
settings.ffmpeg.log.verbosity.set('error')
settings.protocol.ffmpeg.path.set('/var/www/video/ffmpeg')
settings.log.file.path.set('/var/www/video/autodj.log')
mediaplaylist = mksafe(playlist(mode='normal',reload_mode='watch','/var/www/video/media/'))

encoder = %ffmpeg(%video.copy, %audio.copy, format='flv')

output.url(url='rtmp://server:port/live/stream', encoder, mediaplaylist)

Error on console is:

Error 5: this value has type
source(audio=?internal(?A),...) (inferred at /root/.opam/4.08.0/lib/liquidsoap/share/liquidsoap/git/d7c4dfb5/libs/switches.liq, line 16 char 2 - line 18 char 42)
but it should be a subtype of
source(audio=ffmpeg.audio.copy,...)

I try with version 2.0.0 and 2.1.0 with same result.
Thank you for help and advice.

Best Regards,
Sorin Todys

[smimram]

I think that this is because of the mksafe: in order to fallback to blank, we need to be able to decode the audio. Can you try removing this line and adding fallible=true as parameter of output.url?

[sorintodys]

Solution 3 still play just the fallback file but im sure all files have same encoding parameters.

Thank you very much for support me :)

[toots]

Hi! Thanks for your patience working through these bugs too. Are you using the windows version?

[toots]

Also, is there any chance you could send me at least one file from the playlist and the fallback file for solution 3 at [email protected]? Thanks!

[sorintodys]

Thank you very much for answer. All run on linux debian 10 server.

[sorintodys]

Sure, I will send asap the files and more details.

[toots]

Thanks for your email with the script, I was able to confirm the issue and fix it! Here's a script that works here with very little CPU usage:

audio.samplerate.set(48000)
audio.channels.set(2)
video.frame.width.set(640)
video.frame.height.set(360)
settings.frame.video.framerate.set(24)

settings.log.level.set(4)
settings.log.stdout.set(true)

mediaplaylist = playlist(mode='normal',reload_mode='watch','/tmp/video/pl')

security = single('/tmp/video/security.mp4')

mediaplaylist = fallback(track_sensitive=false, [security, mediaplaylist])

encoder = %ffmpeg(%video.copy, %audio.copy, format='flv')

output.url(url='rtmp://pstnet6.shoutcastnet.com:6100/live/stream', encoder, mediaplaylist)

Unless you really need it, I'd suggest to keep ffmpeg logs to the default and liquidsoap logs to level 4. This is usually the best for sending us details info re: an issue. Otherwise, there is too much logs and we cannot see anything 🙂

Let me know if the fix works for you! It should be available both in the main and v2.0.0 branch now.

[sorintodys]

Hi Romain,

Thank you much for answer, you are great!
I still try to make it working and im sure we will find a way.

Best Regards,
Sorin

[toots]

Sure thing. Don't hesitate to follow-up if you're having more issues.