http://gothub.r4focoma7gu2zdwwcjjad47ysxt634lg73sxmdbkdozanwqslho5ohyd.onion/kimono-koans/dano
The answer is, of course, we do, (because ffmpeg is incredible!) we just never use it. dano aims to make what ffmpeg provides easier to use. For lossless files , this means we can confirm that a lossless file decodes to the exact bitstream we encoded, but, for all files , this means our checksums are stable against metadata changes, file name changes, and/or moving a bitstream, or many bitstreams, from one media container into another.