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adding delay to an audio stream of a live feed in ffmpeg ...
https://stackoverflow.com/questions/61284692/adding-delay-to-an-audio-stream-of-a-live-feed-in-ffmpeg
My audio and video are out of sync. The audio is ahead about a second. I suspect the video is slower on account of encoding latency. My solution is to retard the audio using the ffmpeg adelay filter. I originally added a -af "adelay=1000|1000" to my command to delay the audio by 1000ms but I found that this audio filter did nothing.
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
Using the capabilities of map option.You first need to find the index of the desired audio stream in the input file using any of these commands: ffprobe.exe "input_file.mp4" or ffmpeg.exe -i "input_file.mp4" Let's suppose that the index of the audio stream to be delayed is 2 (i.e. the third stream) and that the delayed input is the second one (as in my example).
FFmpeg delay and mix audio streams while keeping …
https://stackoverflow.com/questions/64202188/ffmpeg-delay-and-mix-audio-streams-while-keeping-overall-volume-constant
In this example the first stream is delayed by 123 samples, the second by 2 718, the third by 6 283 185, and the by fourth 11 235 813. This works, except at the beginning of the output it's very quiet. When fed nstreams, amixmakes each stream 1/nth its original volume, which is a good thing in principle.
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 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:
Low-Latency Live Streaming for your Desktop using ffmpeg ...
https://dennismungai.wordpress.com/2018/02/06/low-latency-live-streaming-for-your-desktop-using-ffmpeg-and-netcat/
Preamble: In this post I will explore how to stream a video and audio capture from one computer to another using ffmpeg and netcat, with a latency below 100ms, which is good enough for presentations and general purpose remote display tasks on a local network.. The problem: Streaming low-latency live content is quite hard, because most software-based video …
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