On 5/25/17, Carl Eugen Hoyos <ceffm...@gmail.com> wrote: > 2017-05-25 16:45 GMT+02:00 Paul B Mahol <one...@gmail.com>: > >> +@section surround >> +Apply audio surround upmix filter. >> + >> +This filter allows to produce multichannel output from >> stereo audio stream. > > Does this work on Pro Logic-encoded files (ticket #4085) > or does this filter use a different algorithm?
It works with sample from that ticket. It uses own algorithm. > Does a filter have advantages over an implementation in > libswresample? libswresample doesnt do this. > > Iirc, our Pro Logic downmixer has an issue with "phase shift" > (ticket 3455 / 4175): Does this filter give expected output > for FFmpeg-encoded files or original Pro Logic files (or is > there no difference on upmixing)? FFmpeg downmixing, while certainly not correct, is giving reasonable output when used with this filter. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
