Don't forget the programs 'copysfx' and 'chxformat' in the CDP
MultiChannel Toolkit enable users to tinker with channel masks,
including setting to zero (if that helps), or of course to write a plain
old multichannel WAVE file.
Richard Dobson
http://people.bath.ac.uk/masrwd/mctools.html
On 10/05/2016 20:30, Michael Chapman wrote:
Here's the problem .... when writing a video file, FFMPEG appears to use
the channel_mask from the audio file even if a different channel_mask is
specified on the command line. So even when I specified
"-channel_layout
4.0", the resulting MOV file still had the channel layout set to "quad",
which was then rejected by YouTube.
1)
You can (quite easily) use a hex editor (standard on most Linuxes) to edit
the *.wav.
Or even script this.
Seem to remember doing this about ten years, yawn, ago ... (Could do some
digging!)
2)
TheSoX people were really nice.
A "sox -force_channel_mask 4.0" could be requested
though
a request "sox -force_channel_mask abcd" that would allow any mask would
be more 'democratic'.
Michael
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