On Tue, 15 Jul 2014 19:06:54 -0500, Nicholas Young <[email protected]> wrote: > When encoding Opus audio, libav 10.2 seems to ignore the -ar option: > > ------- > > avconv version 10.2, Copyright (c) 2000-2014 the Libav developers > built on Jul 15 2014 18:32:28 with Apple LLVM version 5.1 > (clang-503.0.40) (based on LLVM 3.4svn) > [aiff @ 0x7f97c0801200] max_analyze_duration reached > Guessed Channel Layout for Input Stream #0.0 : stereo > Input #0, aiff, from 'Method.aiff': > Duration: 00:06:00.74, start: 0.000000, bitrate: 1411 kb/s > Stream #0.0: Audio: pcm_s16be, 44100 Hz, stereo, s16, 1411 kb/s > [libopus @ 0x7f97c0911400] Specified sample_rate is not supported > Output #0, ogg, to 'm6444100.opus': > Stream #0.0: Audio: libopus, 44100 Hz, stereo, s16, 64 kb/s > Stream mapping: > Stream #0:0 -> #0:0 (pcm_s16be -> libopus) > Error while opening encoder for output stream #0:0 - maybe incorrect > parameters such as bit_rate, rate, width or height > > ------- > > When you remove the -ar option, it seems to work fine, but the output is > sampled at 48khz regardless of inputted file's sample rate: > > ------- > > avconv version 10.2, Copyright (c) 2000-2014 the Libav developers > built on Jul 15 2014 18:32:28 with Apple LLVM version 5.1 > (clang-503.0.40) (based on LLVM 3.4svn) > [aiff @ 0x7fe302800000] max_analyze_duration reached > Guessed Channel Layout for Input Stream #0.0 : stereo > Input #0, aiff, from 'Method.aiff': > Duration: 00:06:00.74, start: 0.000000, bitrate: 1411 kb/s > Stream #0.0: Audio: pcm_s16be, 44100 Hz, stereo, s16, 1411 kb/s > File 'm6444100.opus' already exists. Overwrite ? [y/N] y > Output #0, ogg, to 'm6444100.opus': > Metadata: > encoder : Lavf55.12.0 > Stream #0.0: Audio: libopus, 48000 Hz, stereo, s16, 64 kb/s > Stream mapping: > Stream #0:0 -> #0:0 (pcm_s16be -> libopus) > Press ctrl-c to stop encoding > size= 3115kB time=360.75 bitrate= 70.7kbits/s > video:0kB audio:0kB global headers:0kB muxing overhead 16790674.000000% >
That is to be expected -- Opus does not support other sampling rates. -- Anton Khirnov _______________________________________________ libav-tools mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-tools
