That always results in desynced A/V whenever I try it.
Usually lots of errors like the following from ffmpeg, then the audio is about a second behind the video
[mp4 @ 0x98668b4620] Non-monotonous DTS in output stream 0:1; previous: 132227, current: 131204; changing to 132228. This may result in incorrect timestamps in the output file.
Usually lots of errors like the following from ffmpeg, then the audio is about a second behind the video
[mp4 @ 0x98668b4620] Non-monotonous DTS in output stream 0:1; previous: 132227, current: 131204; changing to 132228. This may result in incorrect timestamps in the output file.