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Using mencoder to join mpeg video result in a/v out of sync.
https://forum.videohelp.com/threads/341803-Using-mencoder-to-join-mpeg-video-result-in-a-v-out-of-sync#:~:text=-%20mencoder%20can%20join%20a%20lot%20of%20mpeg,-idx%20-mc%200%20FILE1.MPG%20FILE2.MPG%20FILE3.MPG%20-o%20FINAL.MPG
[MPlayer-users] Audio sync problem with mencoder
https://groups.google.com/g/mplayer_users/c/2kb7bEHOMkQ
mencoder dvd://1 -quiet \-oac copy \-ovc lavc \-lavcopts vcodec=mpeg4:vhq:vbitrate=2048:autoaspect=1 \-mc 0 -noskip \-o <outfile> ("-mc 0 -noskip" is a recent addition after I Google'd for mencoder audio sync problems. It does not seem to have helped.) Oh yeah, I'm doing one-pass ripping -- I've never bothered to figure
Using mencoder to clip avi files results in audio sync ...
https://forum.videohelp.com/threads/358835-Using-mencoder-to-clip-avi-files-results-in-audio-sync-issue
Code: mencoder -ni -ss 30 -endpos 30 Movie.avi -oac copy -ovc copy -o output.avi. And the video that it generates has an issue with the video and the audio being out of sync. The output of the mencoder includes this warning: Code: Too many video packets in the buffer: (280 in 33600000 bytes). Code:
ffmpeg and mencoder slice mp4 video audio out of sync
https://www.linuxquestions.org/questions/linux-software-2/ffmpeg-and-mencoder-slice-mp4-video-audio-out-of-sync-780700/
I am trying to use ffmpeg and mencoder to slice a portion of my video out but the audio is always 2 seconds out of sync. ffmpeg -i bird.avs.MP4 -acodec copy -vcodec copy -ss 00:08:40 -t 00:01:00 test.mp4 mencoder -ss 00:08:40 -endpos 00:01:00 -oac copy -ovc copy bird.avs.MP4 -o test.mp4 mencoder -ss 00:08:40 -endpos 00:01:00 -oac copy -ovc copy -noskip …
CDNWiki - Mencoder Commands
https://wiki.cyberleo.net/wiki/MencoderCommands
Extract subtitles (why?) mencoder -dvd-device /dev/sr0 dvd://1 -vo copy -ao copy -o /dev/null -vobsubout video-english -vobsuboutid eng. Start Here Ogg-Vorbis audio is not compatible with AVI containers. You must mux it separately. Extract audio. mplayer dvd://1 -alang en -ao pcm:fast:waveheader:audio.wav -vc null -vo null. Encode audio
7.8. Using MEncoder to create VCD/SVCD/DVD-compliant …
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-vcd-dvd.html
If the source already has AC-3 audio, use -oac copy instead of re-encoding it. mencoder -oac copy -ovc lavc -of mpeg -mpegopts format=dvd:tsaf \ -vf scale=720:576,harddup -ofps 25 \ -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:\ keyint=15:vstrict=0:aspect=16/9 -o movie.mpg movie.avi
7.7. Using MEncoder to create QuickTime-compatible files
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-quicktime-7.html
Without this option, MEncoder will simply put a marker in the video stream that a frame was duplicated, and rely on the client software to show the same frame twice. Unfortunately, this "soft duplication" does not survive remuxing, so the audio would slowly lose sync with the video. The final filter chain looks like this:
mencoder(1): movie encoder - Linux man page
https://linux.die.net/man/1/mencoder
audio delay in seconds (positive or negative float value) Negative values delay the audio, and positive values delay the video. Note that this is the exact opposite of the -audio-delay MEncoder option. NOTE: When used with MEncoder, this is not guaranteed to work correctly with -ovc copy; use -audio-delay instead. -ignore-start
7.1. Making a high quality MPEG-4 ("DivX") rip of a DVD movie
https://mplayerhq.hu/DOCS/HTML/en/menc-feat-dvd-mpeg4.html
MEncoder 's audio/video synchronization algorithms were designed with the intention of recovering files with broken sync. However, in some cases they can cause unnecessary skipping and duplication of frames, and possibly slight A/V desync, when used with proper input (of course, A/V sync issues apply only if you process or copy the audio track while transcoding the video, …
[MPlayer-users] -oac copy results in out of sync audio ...
https://groups.google.com/g/mplayer_users/c/k4QrEe1U9bs
the video but copy the audio the audio ends up totally out of sync. Is there an option i need to keep the audio in sync when transcoding the video. mencoder in.mkv -af volume=6:0 -mc 0 -oac copy -ovc x264 -x264encopts preset=slow:tune=film:crf=15:frameref=15:fast_pskip=0:threads=auto:bitrate=2000-nosub -vf …
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