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audio-sync bugs when transcoding (#5962) · Issues ...
https://code.videolan.org/videolan/vlc/-/issues/5962
audio-sync option generates various bug when transcoding : When used like this (the input stream is from a Freebox) :
transcode: video and audio out of sync - The VideoLAN …
https://www.forum.videolan.org/viewtopic.php?t=44243
transcoding. I've also tried with and without the 'audio-sync' option. I see no difference with our without this option. I've also tried various video and audio bitrates. I am using VLC media player version 0.8.6d. The system that I am doing the transcoding on is a P4 3.2GHz system. There has got to be a simple solution to this because I assume ...
Make audio-desync work on sout also (#2461) · Issues ...
https://code.videolan.org/videolan/vlc/-/issues/2461
vlc --audio-desync=10000 polii.wmv :sout=#transcode{vcodec=WMV2,vb=800,scale=1,acodec=wma,ab=128,channels=2}:duplicate{dst=std{access=http,mux=asf,dst=:8080}} Sync can be adjusted via Extended settings GUI and that also works on streaming (it adjusts audio-delay value). According to sourcecode the audio-desync adjusts same value
Audio Drift (AV sync issues) with Transcoding h264/aac ...
https://trac.videolan.org/vlc/ticket/17219
I've tried using --sout-transcode-audio-sync in the transcode options, but it is not recognized, probably because of the duplicates. I will attempt a stack trace tomorrow. To upload designs, you'll need to enable LFS and have an admin enable hashed storage.
audio-sync with #duplicate to separate raw output files ...
https://forum.videolan.org/viewtopic.php?t=115544
audio-sync When this option is enabled, VLC will drop/duplicate video frames to synchronize the video track on the audio track. which appears to be related to the 'transcode' output module, and; --sout-transcode-audio-sync, --no-sout-transcode-audio-sync Synchronise on audio track (default disabled)
Documentation:Streaming HowTo/Command Line …
https://wiki.videolan.org/Documentation:Streaming_HowTo/Command_Line_Examples/
Transcoding. Transcode a stream to Ogg Vorbis with 2 channels at 128kbps and 44100Hz …
VLC HowTo/Use a capture card - VideoLAN Wiki
https://wiki.videolan.org/VLC_HowTo/Use_a_capture_card/
The minimal command to transcode from a capture card to a portable MPEG file (this example includes trancoding which may be lessly, be careful) is thus: vlc v4l:// :v4l-norm=1: '--sout=#transcode{vcodec=mp1v,vb=2030,audio-sync,acodec=mpga,ab=192,channels=2}:std{access=file,mux=mpeg1,url="out_file.mpg"}'
VSG:Audio:Out of Sync - VideoLAN Wiki
https://wiki.videolan.org/VSG:Audio:Out_of_Sync/
If you are transcoding a file, use the audio-sync option. You can manually set the audio offset while playing (so you can put the audio back in sync). The default keys to increase/decrease the offset are Ctrl+K and Ctrl+L in Windows, and f and g in Mac (adjust step is 50ms).
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