So here is a working convolution command. Surround input files, with more than 8 channels, have channels assigned in their headers by previously applied ffmpeg commands. So all of those formats are subsets of the IR file, and in order. The order of the pairs in the IR file is:įL|FR|FC|LFE|BL|BR|SL|SR|FLC|FRC|TFL|TFR|BC|TC|TBL|TBR I have 32 IRs (16 stereo pairs) in one file and can use it for: As long as the channel layouts are recognized by ffmpeg. This isn't the case for all filters - 'aecho' works just fine, for example.I am successfully using ffmpeg's headphone convolution audio filter (see ffmpeg filters documentation section 8.78) to make binaural versions of surround sound with up to 16 channels.

I can't figure out what would be causing this.

Once I add another filter into the graph (in this case, it's a 'volume' filter), there is a lot of noise introduced. If I only have 'abuffer' and 'abuffersink' filters, and grab the audio frame from the filtergraph, it sounds perfect. I seem to be having a bit of trouble using FFMPEG audio filters in C++ code.

Ffmpeg filters per channel