Room correction with convolution per sample rate

[simoncn]

Unfortunately there is a problem with my proposal for adding support for a setting such as

convOut=-i /mnt/disk1/share/MinimServer/convolution/Cor1S#samplerate#.wav -lavfi afir=gtype=gn

The problem is that MinimStreamer currently verifies the convOut setting when the stream.options property is configured. It does this by making a test invocation of ffmpeg with the convOut string and dummy input and output streams. If the convOut string uses substitution values from the audio properties of the input file, this test invocation doesn't work because there is no input file to provide the substitution values.

At the time of making the test invocation, the range of actual sample rate values for potential input files isn't known, so attempting to guess a sample-rate substitution value or values for the test invocation could result in a false positive or false negative.

I will give this some further thought.