I want to record video from 1 source and audio from another. In order to avoid issues with synchronisation, I use jit.vcr. It works well, recording video and audio and putting it into one .mov file. BUT: there's something wrong when recording the audio:
1) There seems to be a slip of around 500 ms og the .mov,where there is no sound
2) I use line for creating an envelope in order to avoid clicks. For some reason the changes in volume are not recorded, - the sound starts with a click.
I have made a patch with a totally comparable situation between jit.vcr and sfrecord. The latter works fine. Envelope is ok, and the file works as usual. The former does the described rarities.