Video editing - sync 2 videos, side-by-side

esuhl

Well, I've spent hours playing around with (the legendary) ffmpeg, trying to convert the MOV files from my camera to something that DaVinci Resolve will recognise, with limited success.

In Linux, I ONLY seem to be able to get video to work if I use the MJPEG codec in a MOV container, which causes a huge drop in quality (or huge file sizes compared to the input file). Audio works fine, using either pcm_s16le or aac codecs.

ffmpeg -i input.mov -c:v mjpeg -r 29.97 -q 10 -c:a pcm_s16le output.mov

The options are:
-i <input file>
-c:v <video codec>
-r <frame rate>
-q <quality>
-c:a <audio codec>

The Windows version of DaVinci seems to have better codec compatibility, so I tried that instead. Video works well using the H264 codec in MOV or MP4 containers. Perfect! Unfortunately, there is no audio output at all, even though the VU meters are lighting up and I can see the waveform.

ffmpeg -i input.mov -c:v h264 -r 29.97 -c:a aac output.mp4

I've checked the audio output device settings (amongst other things), and tried playing various other audio files, but although the waveforms are visible, and the VU meters light up, there's no sound at all.

Anyway, I thought I'd update the thread in case the ffmpeg examples are useful to anyone.