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Add audio (with an offset) to video with FFMPEG - Stack ...
https://stackoverflow.com/questions/7426179/add-audio-with-an-offset-to-video-with-ffmpeg
The video starts at 500 seconds into the audio. Using FFMPEG, how can I add the the audio to the video but specify a 500 seconds audio offset (So that they sync up)? EDIT: Down the bottom of this page it suggests how to specify an offset. $ ffmpeg -i video_source -itsoffet delay -i audio_source -map 0:x -map 1:y .....
Add audio (with an offset) to video with FFMPEG
https://ask4knowledgebase.com/questions/7426179/add-audio--with-an-offset--to-video-with-ffmpeg
The video starts at 500 seconds into the audio. Using FFMPEG, how can I add the the audio to the video but specify a 500 seconds audio offset (So that they sync up)? EDIT: Down the bottom of this page it suggests how to specify an offset. $ ffmpeg -i video_source -itsoffet delay -i audio_source -map 0:x -map 1:y .....
In ffmpeg, how to delay only the audio of a .mp4 video ...
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
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 “itsoffset” in the above example is placed before file 1. When the mapping happens, it says “Take the audio of file 0 and the video of file 1, leave the audio of file 0 alone and apply the offset to the video of file 1 and merge them …
how to add audio to exist video using FFMPEG at specific ...
https://video.stackexchange.com/questions/23177/how-to-add-audio-to-exist-video-using-ffmpeg-at-specific-time
I have video file (.avi) that 10 minutes long. I also have audio file (.wav) that is one minute long. I need to add the audio to the video, but the audio needs to start at one minute in to the video. How can I do this with ffmpeg? I've already tried this command ( with a 30 second offset instead of one minute):
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