On 2/26/13, Brad O'Hearne <[email protected]> wrote: > On Feb 26, 2013, at 4:39 AM, Rene J.V. Bertin <[email protected]> wrote: > >> On Feb 26, 2013, at 02:54, Brad O'Hearne wrote: >>> >>> - Linear PCM, 24 bit little-endian signed integer, 2 channels, 44100 Hz >> >> You realise that your earlier message mentioned 32 bit float capture >> data? > > Rene - thank you for your attention to detail. You are correct -- the sample > format I mentioned above was a sleep-deprived copy/paste mistake. The proper > sample format was as I originally stated: > > - Linear PCM, 32 bit little-endian floating point, 2 channels, 44100 Hz > > Thanks again for the good catch! So back to the issue at hand -- I've done a > fair amount of reading on audio formats and structure, but I'm still not > completely clear on the layout of these buffers depending on #of bits, > channels, whether they are interleaved, and sample rate, alignment, and > endianness (though with the other info this may be clear). I'm sure there > are a few simple principles at work -- but if there's someone that has a > good grasp of how these layouts work, I'll give it the college try to > convert the sample format myself. > > Having said that, if anyone has any idea or suggestions for how to fix the > original issue (which I've traced as far as the swri_realloc_audio call > inside of swr_convert). > > Thanks everyone's help and discussion thus far -- it is greatly appreciated.
Planar is used if sample_fmt is set to planar one - in this case for every channel, channel samples are stored in separate buffer eg. p->data[X] where X is channel number. Interleaved use only p->data[0] and every channel sample comes one after another. Samples are always considered to be in native endiannes (you need to do swapping on your own) > > > Cheers, > > Brad > > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user > _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
