New answers tagged sync
I found a nice solution perfectly answering my question : http://www.dashware.net . I'll try it later but it seems the right solution !
Short Answer Split your Video track into separate Events; Adjust the Events individually by dragging them along the timeline and stretching/expanding them; Overlap the adjacent Events so that there were no gaps; Long Answer I find one of the most valuable features of Sony Vegas its ability to split the original tracks into Events and adjust them ...
For some reason I think this is avoided when using ffmpeg's concat PROTOCOL (ffmpeg -i "concat:...") rather than its concat DEMUXER (ffmpeg -f concat -i mylist.txt). Oddly, it's also slightly more convenient since using the demuxer requires me to create the text file with the file names in it while with the protocol I can just specify them on the command ...
I would strongly suggest that you don't work with mp4/H264 files for sync-sensitive work. Transcode the files and work with those.
Download the 32-bit static build ffmpeg from here and try either of the two methods: 1) regenerate the timestamps ffmpeg -i input.mp4 -c copy -fflags genpts new-input.mp4 2) Extract audio, import that separately, align starts in timeline and then check ffmpeg -i input.mp4 -vn -c:a copy input-audio.mp4
Keep in mind that the h.264 codec (seems your cam uses it), although versatile, should only be used for re-viewing purposes. It's not a steady-as-a-rock pro-level codec, one used to record sync sound. It can work, and does (like millions of people, I've used it many times with DSLRs), but in the end be ready for sync issues. More over, your camera is really ...
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