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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
If you need to delay audio by 3.84 seconds, use a command like this: ffmpeg.exe -i "movie.mp4" -itsoffset 3.84 -i "movie.mp4" -map 0:v -map 1:a -c copy "movie-audio-delayed.mp4". Make sure, that your ffmpeg build is not too old, newer than 2012 will suffice.
delay-audio-with-ffmpeg.sh · GitHub
https://gist.github.com/adrienjoly/e5b2db9c9a61f454ed08f56c32999f17
delay-audio-with-ffmpeg.sh. Raw. delay-audio-with-ffmpeg.sh. # use this command to add 5-seconds delay to the audio track of a video. #. ffmpeg -i input.mp4 -itsoffset 5 -i input.mp4 -map 0:v -map 1:a -vcodec copy -acodec copy delayed.mp4. Raw.
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 adding unwanted audio delay? : ffmpeg
https://www.reddit.com/r/ffmpeg/comments/rs2ddh/ffmpeg_adding_unwanted_audio_delay/
I combined h264 video with ac3 audio in FFmpeg (Lavf58.76.100) using the following command: ffmpeg -i input.mp4 -i input.ac3 -map 0:v -map 1:a -c copy output.mp4. When I opened both my initial audio (input.ac3) and my final video (output.mp4) in Adobe Premiere and looked at the audio waveforms, I realized the the video had a 32ms audio delay compared to the original audio.
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 Fix Audio Sync – Uly.me
https://uly.me/ffmpeg-fix-audio-sync/
If you have a video with audio sync issues, you can easily fix it using ffmpeg. It takes 2 inputs: the filename and delay: 0.100 is 100 ms or 0.1 seconds. Output file has -fixed appended to it. It’s fast. Only takes 2-3 seconds to process a 1.5 hour recording. Here’s the script.
(FFmpeg) How to Add an Echo to an Audio Track? - John ...
http://johnriselvato.com/ffmpeg-how-to-add-an-echo-to-an-audio-track/
$ ffmpeg -i input.mp3 -af "aecho=in_gain=0.5:out_gain=0.5:delays=500:decays=0.2" output.mp3 . In this filter the delay and decay arguments are plural because multiple delays and decays may be stacked using the | syntax for extra echo control, as seen below:
ffmpeg delay sound Code Example - codegrepper.com
https://www.codegrepper.com/code-examples/whatever/ffmpeg+delay+sound
ffmpeg audio delay filter; ffmpeg no delay stream; ffmpeg reduce delay; audio sync ffmpeg; ffmpeg delay audio by 90 seconds; ffmpeg mp4 set a delay between audo and video; ffmpeg merge audio and video audio delay 1s; ffmpeg delay stream; add audio with some delay in ffmpeg; min delay ffmpeg; ffmpeg amerge delay; ffmpeg fix audio delay; ffmpeg …
FFMPEG: How to add audio to video - JSON2Video
https://json2video.com/how-to/ffmpeg/ffmpeg-add-audio-to-video.html
If you want to add an audio stream at a specific time in the video, you can use the adelay filter as well: ffmpeg \ -i video1.mp4 -i audio1.mp3 \ -filter_complex " \ [1:a] adelay=10000|10000 [voice]; \ [0:a] [voice] amix=inputs=2:duration=longest [audio_out] \ " \ -map 0:v -map " [audio_out]" \ -y output.mp4.
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