This is a single stream with video and audio, no stupid ass SDP file required. What do? I've had the same problem before introducing ProRes, just concatenating the MTS files into MP4 copying the video stream and adding the new audio.Ffplay udp stream. ffmpeg -i full.mov -i full-tascam.flac -map 0:0 -map 1 -vcodec copy -ar 48000 full-tascam.mov At this point the audio that was just in sync with the original audio from the video files now goes out of sync when the video stutters. Export the new external audio matched to the start and the length of the original audio.
At this point both audio tracks line up, the external track is still in sync with the camera audio at the end. Imported into audacity, lined up the external audio with a clap and trimmed to length. ffmpeg -f concat -i mylist.txt -c copy full.mov At this point I have a file with video stutters every ~32 minutes, but the audio stays in sync with the video.
The editor handles ProRes better than the compressed files so I convert. Converted all the H264 MTS files to ProRes MOV files.So I'm wondering where things are going wrong in this process: The problem I have is that the audio recorder doesn't break files at the same times so I'll usually end up with 3 video files and 1 audio file. Since its microphone is crap, I also record audio separately and have to sync them back up before editing. I have a video camera which records AVCHD to MTS files, it splits files at 3.89GB. I've gotten it working sometimes but it doesn't seem to be consistent.
I've gone through several different variants of this process and it always causes me problems.
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