Room correction with convolution per sample rate

[simoncn]

Thanks very much for doing this very detailed testing.

The processor in the Melco N1 isn't very powerful and I am not surprised that it struggles to keep up with convolution processing on 352 kHz files.

The 48 kHz problem is caused by a bug (segmentation fault) in ffmpeg. It doesn't happen with a Windows build of ffmpeg, only with the armhf build used by the Melco. I tried the latest git version (20081220) and the bug is still there.

It isn't very easy to report bugs like this because FFmpeg is distributed as source code. All binaries available for download are produced by other parties. I will try building this from source myself to see if I get the same problem. It will be a week or so before I can do this.

I can't see any way to get FFmpeg to transcode from DSF to PCM before applying the filter. The only solution I have found on the forums is to create two instances of ffmpeg connected via a pipe and this would require major changes to how MinimStreamer does transcoding.

I am not sure why attempting this with a DSF file produces the "ended unexpectedly" error that you are seeing. I will do some investigation and post back here. Again, it will be a week or so before I can do this.