Hi,
could somebody explain what the
gavl_audio_format_t::channel_locations[] is supposed to contain?
Can I safely set them all to GAVL_CHID_NONE? Or, is it supposed to
be numbered?
I guess what is confusing me is all the LEFT, CENTER, and REAR
definitions. I assume this comes from DVD 5.1 lingo, right?
I work with multi-channel audio at times, but never in a home
entertainment environment. For me, a channel is just a channel.
....
My problem is how to down mix from, say, an 8channel audio to a 4
channel player.
When using a stereo output, just setting this worked for the internal
gavl_audio_converter:
output_audio_format.channel_locations[0] = GAVL_CHID_NONE;
But, now, when I want to mix 8 to 4 channels I am getting:
Couldn't construct mix matrix, using (probably wrong) default
Segmentation fault
Here is the file I am testing:
http://romanhaefeli.net/8ch_does_play.wav
Strangely enough, this is an 8ch wav that DOES play on a 4channel
output using gavl:
http://romanhaefeli.net/8ch_does_not_play.wav
I assume this has something to do with interlacing?
Any idea why this is happening? Seems weird that it would segfault
on me..or am I doing something else stupid?
...Ok, the real question:
If my output is 5 channels, but my input is 8 channels, how do I tell
gavl to simply select the first five channels?
Or, is there a way to build a channel matrix in gavl so that I can
mix arbitrary channels?
-august.
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