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conversion - In ffmpeg, how to delay only the audio of a ...
https://superuser.com/questions/982342/in-ffmpeg-how-to-delay-only-the-audio-of-a-mp4-video-without-converting-the-au#:~:text=If%20you%20need%20to%20delay%20audio%20by%203.84,not%20too%20old%2C%20newer%20than%202012%20will%20suffice.
conversion - In ffmpeg, how to delay only the audio of a ...
https://superuser.com/questions/982342/in-ffmpeg-how-to-delay-only-the-audio-of-a-mp4-video-without-converting-the-au
I extracted audio with Audacity, then cut some silence (equal to delay) from end of video, and added to beginning of audio. After doing any other adjustments to audio eg. normalization, I exported audio, and replaced audio in original via ffmpeg: ffmpeg-i "in.mp4" -i "synced.m4a" -vcodec copy -acodec copy -map 0:0 -map 1:0 out.mp4
How to add offset or delay to audio file with ffmpeg?
https://stackoverflow.com/questions/52446539/how-to-add-offset-or-delay-to-audio-file-with-ffmpeg
For formats without timestamps, you'll need to add silence, as @Brad mentioned. ffmpeg -i 3.mp3 -af adelay=100000|100000 delayed.mp3. The adelay takes delay in milliseconds per channel, separated by |. Share. Improve this answer. Follow this answer to receive notifications. answered Sep 21 '18 at 15:17.
delay-audio-with-ffmpeg.sh · GitHub
https://gist.github.com/adrienjoly/e5b2db9c9a61f454ed08f56c32999f17
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Insert Audio Delay With ffmpeg - VideoHelp Forum
https://forum.videohelp.com/threads/346293-Insert-Audio-Delay-With-ffmpeg
The command I am attempting is: ffmpeg -i test.avi -itsoffset 0.216 -i test.avi -map 0.0 -map 1.1 -ab 128k -vcodec libx264 -r 25.00 -b 1268k -s 512x368 new.mp4. The command runs and produces a file but it still has the audio delay. I can get around it by transcoding the audio and video separately and inserting the delay with mp4box but I would ...
Correcting for audio/video sync issues with the ffmpeg ...
https://tdngan.wordpress.com/2015/10/13/correcting-for-audiovideo-sync-issues-with-the-ffmpeg-programs-itsoffset-switch-2/
The following commandlines all result the same thing, “delay the audio by 2 seconds”. This means that in the output file, you will see the video start and then 2 seconds later the audio will start. The differences are the location of “itsoffset” and what stream is mapped:
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