On 8/3/15, Romeyke, Andreas <andreas.rome...@slub-dresden.de> wrote: > Dear FFMPEG-developer, > > in case of digital preservation I want to convert/normalize videos to files > with Matroska-Container, FFV1 video- and wave-PCM audiocodec. > > I am using this commandline: > > ffmpeg -i inputvideo.webm -c:v ffv1 -level 3 -g 1 -coder 1 -context 1 > -slices 16 -slicecrc 1 -report -c:a pcm_s32le -y outputvideo.mkv > > This line works fine, but with "-c:a pcm_u24le" I got the error message: > "[matroska @ 0x1a0adc0] No wav codec tag found for codec pcm_u32le" > > Could you explain me, what was going wrong? >
Matroska does not support such audio codec. > And secondly, could you explain the difference between the various > PCM-encodings? My assumpation was, that > * the unsigned variant are "linear PCM", because there are only positive > quantization levels > * the signed variant are "linear differential PCM" > * and the float variants are A/u - weighted PCM? > > Or I am totally wrong with this interpretation? Please, could you link me > to an explanation? > There is no point to use unsigned PCM use signed codec you will not loose anything. > Thanks in advance > > Mit freundlichen Gru:ssen > With best regards, > > Andreas Romeyke > -- > project member "long-term preservation" > > Saxon State- and University Library Dresden (SLUB) > Department 2 (IT), Division 2.3 (network and data security) > Zellescher Weg 18 | 01069 Dresden > phone: +49 351 4677 216 > E-Mail: andreas.rome...@slub-dresden.de > http://www.slub-dresden.de/ | @slubdresden > > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
