[FFmpeg-trac] #3902(avformat:new): FFmpeg MD5 output different with same data #3

[FFmpeg]

#3902: FFmpeg MD5 output different with same data #3
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             Reporter:               |                    Owner:
  ahthovaikied                       |                   Status:  new
                 Type:  defect       |                Component:  avformat
             Priority:  normal       |               Resolution:
              Version:  git-master   |               Blocked By:
             Keywords:  md5 mpeg2    |  Reproduced by developer:  0
  ac3 mkv                            |
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by ahthovaikied):

 Replying to [comment:27 Cigaes]:
 > Good. Now you must try and spot differences in the
 {{{extradata_hash=MD5:...}}} values. If not, you will need to do the same
 with {{{-show_packets}}}. If you do not find differences, that means that
 the output part is producing different output, not the input part.
 Without {{{--disable-vaapi --disable-vdpau}}}:
 {{{
 $ ffprobe -show_packets -show_data_hash md5 cut.mkv 2>&1 | grep -F
 'data_hash=MD5:' > /tmp/data_hashes1.txt
 }}}

 With {{{--disable-vaapi --disable-vdpau}}}:
 {{{
 $ ffprobe -show_packets -show_data_hash md5 cut.mkv 2>&1 | grep -F
 'data_hash=MD5:' > /tmp/data_hashes2.txt
 }}}

 No difference:
 {{{
 $ diff /tmp/data_hashes{1,2}.txt
 $
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/3902#comment:28>
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