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sepinf-inc
Investigate LBC->WAV conversion failures in our internal transcription cluster
Hi @hauck-jvsh, since this seems related to the transcription container environment, could you take a look at this?
Thanks! I just have this one: https://github.com/sepinf-inc/IPED/pull/1799#issuecomment-1666497454
Maybe @tc-wleite can share others.
Thank you, I didn't see it. I think for now it is enough, maybe if I'm able to fix for this file some other would be nice to test.
@hauck-jvsh, I will send you privately a few other LBC audios I collected here.
@hauck-jvsh, I will send you privately a few other LBC audios I collected here.
@hauck-jvsh, I just sent you 50 LBC audios through Teams.
I ran some tests here and strangly, the mplayer throws the following error
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders libavcodec version 58.134.100 (external) Cannot find codec 'libilbc' in libavcodec... ADecoder init failed :( ADecoder init failed :( Cannot find codec for audio format 0x63626C69. Audio: no sound Video: no video
However if I run the ffmpeg directly, ffmpeg -i sample.lbc teste.wav, it is able to convert the file.
Ps, I had to separately install ffmpeg, so maybe the mplayer is coming with an incomplete ffmepg lib.
Do you it is worth using ffmeg as fallback in the transcription cluster?
Do you it is worth using ffmeg as fallback in the transcription cluster?
Getting (and maybe compiling?) the latest version of MPlayer didn't help?
I didn't try to compile it, I just try to install the latest pack available for ubuntu 22.04. I can try to compile and see if it solves.
I didn't try to compile it, I just try to install the latest pack available for ubuntu 22.04. I can try to compile and see if it solves.
I see... Well, that was just a guess, I am not a Linux user. I will ask @aberenguel to test on his environment.
I've just tried in Ubuntu 22.04 and 23.04. Not supported on either.
Command mplayer -benchmark -vo null -vc null -srate 16000 -af format=s16le,channels=1 -ao pcm:fast:file=sample.wav sample.lbc
Ubuntu 22.04
MPlayer 1.4 (Debian), built with gcc-11 (C) 2000-2019 MPlayer Team
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing sample.lbc.
libavformat version 58.76.100 (external)
libavformat file format detected.
[ilbc @ 0x7fe660e6f8e0]Estimating duration from bitrate, this may be inaccurate
[lavf] stream 0: audio (ilbc), -aid 0
Load subtitles in ./
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
libavcodec version 58.134.100 (external)
Cannot find codec 'libilbc' in libavcodec...
ADecoder init failed :(
ADecoder init failed :(
Cannot find codec for audio format 0x63626C69.
Audio: no sound
Video: no video
BENCHMARKs: VC: 0.000s VO: 0.000s A: 0.000s Sys:-1766.428s = -1766.428s
Exiting... (End of file)
Ubuntu 23.04
MPlayer UNKNOWN-12 (C) 2000-2023 MPlayer Team
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing sample.lbc.
libavformat version 59.27.100 (external)
libavformat file format detected.
[ilbc @ 0x7f23d9e8ad00]Estimating duration from bitrate, this may be inaccurate
[lavf] stream 0: audio (ilbc), -aid 0
Load subtitles in ./
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
libavcodec version 59.37.100 (external)
Cannot find codec 'libilbc' in libavcodec...
ADecoder init failed :(
ADecoder init failed :(
Cannot find codec for audio format 0x63626C69.
Audio: no sound
Video: no video
BENCHMARKs: VC: 0.000s VO: 0.000s A: 0.000s Sys:-2082.586s = -2082.586s
Exiting... (End of file)
I ran some tests here and strangly, the mplayer throws the following error
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders libavcodec version 58.134.100 (external) Cannot find codec 'libilbc' in libavcodec... ADecoder init failed :( ADecoder init failed :( Cannot find codec for audio format 0x63626C69. Audio: no sound Video: no video
However if I run the ffmpeg directly,
ffmpeg -i sample.lbc teste.wav, it is able to convert the file. Ps, I had to separately install ffmpeg, so maybe the mplayer is coming with an incomplete ffmepg lib.
ffmpeg worked in both Ubuntu 22.03 (ffmpeg version 4.4.2-0ubuntu0.22.04.1) and 23.04 (ffmpeg version 5.1.2-3ubuntu1). Why not use ffmpeg instead of mplayer?
Why not use ffmpeg instead of mplayer?
Thanks for testing, @aberenguel! As MPlayer is already used by IPED, I think it would be better to avoid another dependency. However, if MPlayer is not opening LBC audios on Linux (it works on Windows, which is odd), I think it is fine to use FFmpeg. Probably using it as a fallback, as @hauck-jvsh suggested, seems a better option to minimize possible side effects (e.g. the opposite situation, audios supported by MPlayer but not FFmpeg).
I tried in many OS using docker (Alpine, Debian, Fedora) and it has not worked in none of them. I also tried using smplayer snap package. Interesting is that smplayer plays the file sample.lbc, but the mplayer not.
$ sudo snap install smplayer
$ snap run --shell smplayer
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
$ mplayer sample.lbc
MPlayer 1.5-9 (C) 2000-2022 MPlayer Team
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing sample.lbc.
libavformat version 59.17.102 (internal)
libavformat file format detected.
[ilbc @ 0x560bc2739640]Estimating duration from bitrate, this may be inaccurate
[lavf] stream 0: audio (ilbc), -aid 0
Load subtitles in ./
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
libavcodec version 59.21.100 (internal)
Cannot find codec 'libilbc' in libavcodec...
ADecoder init failed :(
ADecoder init failed :(
Cannot find codec for audio format 0x63626C69.
Audio: no sound
Video: no video
Exiting... (End of file)
As MPlayer is already used by IPED, I think it would be better to avoid another dependency.
I agree, this seems the best approach, if possible of course, since this seems an environment issue, not an IPED one...
Maybe this issue is related to how mplayer was built in official packages? Perhaps may exist a linking option so libavcodec would link to libilbc...
If building from source doesn't work and such linking option doesn't exist, I'm not against using ffmpeg as fallback as @hauck-jvsh suggested and if it is found in PATH.
@hauck-jvsh could you check if this is still happening after we upgraded our cluster infrastructure to use proxmox VMs? Was the SO changed?
I can check, but probably it still occur, we install the same Ubuntu in the VM's and we are using the same containers.