Both "concat protocol" (for h264 TS files) and "Concat demuxer" (for h264 PS files) produce artifacts that are unpleasant to watch: In other words, we have to start the video with a delay.To concat two mp4 or ts files (I've both formats) ffmpeg offers someĬalls that I've tried. Fixing audio behind the videoįor this fix, we have to start playing audio earlier. ![]() The good news is, you can be as granular as milliseconds even. With a couple of attempts, you should get a good result. If you don’t know the exact delay, unfortunately, there’s no easy way rather than trial and error. ![]() Here the assumption is the audio is ahead of the video for three seconds. What happens is the second input which we take its audio starts with three seconds delay.
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