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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
I have a 10 minute video and a 50 minute audio mp3. 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.
Correcting for audio/video sync issues with the ffmpeg ...
https://wjwoodrow.wordpress.com/2013/02/04/correcting-for-audiovideo-sync-issues-with-the-ffmpeg-programs-itsoffset-switch/
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 …
ffmpeg - How can I mux video and audio from separate ...
https://video.stackexchange.com/questions/22303/how-can-i-mux-video-and-audio-from-separate-sources-thatre-at-different-frame-r
Try scaling to audio length = video length - offset and mux with the offset. This assumes that the drift is linear. ... You mean to input into atempo the value of the video source's length minus the 0.85s offset, but to also include the offset in the code? so ffmpeg -y -i videosource.mkv -itsoffset 0.85 -i audiosource.aac -map 0:0 -map 1:0 -af ...
Add audio (with an offset) to video with FFMPEG
https://ask4knowledgebase.com/questions/7426179/add-audio--with-an-offset--to-video-with-ffmpeg
Exactly as in your linked page: ffmpeg -i input_1 -itsoffset 00:00:03 -i input_2. Note that you place the -itsoffset switch before the input you want to delay, in this case input_2 will be delayed. So in your case that the video starts later, you would add -itsoffset 00:08:20 before the video input. ib11. 2019/06/01.
FFmpeg Mux Video and Audio from Two Videos - 2020
https://www.bogotobogo.com/FFMpeg/ffmpeg_mux_video_audio_from_two_videos.php
Suppose we want to mux one video file which has video (valid) and audio (not needed) with another audio file which has desirable audio. We can just follow the logic of the previous section, and the command for concatenation looks like this: $ ffmpeg -i SF.mp4 -i Two_BeSureToWearFlowersInYourHair.mp3 -c copy -map 0:0 -map 1:0 -shortest ...
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
Insert Audio Delay With ffmpeg - VideoHelp Forum
https://forum.videohelp.com/threads/346293-Insert-Audio-Delay-With-ffmpeg
ffmpeg -y -i "H:\Output\video.avi" -itsoffset 00:00:05.0 -i "H:\Output\audio.mp3" -vcodec copy -acodec copy -map 0:0 -map 1:0 -r 25 -f avi "H:\Output\test.avi" -> both extend the playtime by 5 seconds, both video and audio end before => haven't found a way to start the video 5 seconds before the audio
(FFmpeg) How to Mix Additional Audio into a Video? - John ...
http://johnriselvato.com/ffmpeg-how-to-mix-additional-audio-into-a-video/
April 15, 2020. By: jdriselvato. Tags: FFmpeg. Adding an additional audio source on top of the audio already in a video can be accomplished with the amix filter. This might be useful for adding background music to a commentary video. The command is as follows: $ ffmpeg -i input.mp4 -i input.mp3 -filter_complex "amix" -map 0:v -map 0:a -map 1:a ...
FFmpeg Formats Documentation
https://ffmpeg.org/ffmpeg-formats.html
You can select the output format of each frame with ffmpeg by specifying the audio and video codec and format. For example to compute the CRC of the input audio converted to PCM unsigned 8-bit and the input video converted to MPEG-2 video, use the command: ffmpeg -i INPUT -c:a pcm_u8 -c:v mpeg2video -f crc -.
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