[FFmpeg-trac] #3524(avcodec:new): FFmpeg MD5 output different with same data

FFmpeg trac at avcodec.org
Thu Apr 3 10:52:53 CEST 2014

#3524: FFmpeg MD5 output different with same data
             Reporter:  ahthovaikied  |                    Owner:
                 Type:  defect        |                   Status:  new
             Priority:  normal        |                Component:  avcodec
              Version:  git-master    |               Resolution:
             Keywords:  aac           |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |

Comment (by cehoyos):

 Replying to [comment:4 jamal]:
 > Replying to [comment:3 cehoyos]:
 > > Do you have a sample for which {{{--disable-avx}}} produces different
 output on an Ivy Bridge?
 > Any float audio stream will output different md5 values depending on
 arch and instructions used. That's why the relevant FATE tests use
 tiny_psrn, as it's not bit exact.

 What I meant was: I tested several different aac samples with and without
 {{{--disable-avx}}} and was unable to find a difference in the output of
 {{{ffmpeg -i input.aac -f crc -}}}.
 Do you have a sample that produces different output with and without avx?

Ticket URL: <https://trac.ffmpeg.org/ticket/3524#comment:5>
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