On Wed, Nov 05, 2014 at 14:01:37 -0500, Luke Davis wrote: > Steve Harris has one or two LADSPA effects for working with Dolby Surround, > which may be what you're talking about here if I understand the most recent > post correctly (I have not been following the thread) > > http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html#tth_sEc2.102
That's actually the exact opposite: "It allows you to encode four channels of sound into a stereo compatible stream that will be decoded by a Dolby1 Surround/Pro-Logic decoder into Left, Right, Center and Surround signals." ffmpeg already (apparently) supports this, see "-matrix_encoding", https://www.ffmpeg.org/ffmpeg-resampler.html The original poster needs the opposite, a decoder: 2 channels back to 5.1 (or 4.0). I have been at a total loss when googling. The only free software I have found is AC3Filter, http://www.ac3filter.net/ . I actually missed this important sound, but see it now: It's open source, and claims to be GPL2 (plus/minus the licenses of other included code). I'm still skimming through its code though, looking for the code which accomplishes the up-mix. Moritz _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
