[FFmpeg-trac] #662(FFmpeg:new): aac distrorted after transcoding (regression)

FFmpeg trac at avcodec.org
Thu Nov 17 04:55:41 CET 2011

#662: aac distrorted after transcoding (regression)
               Reporter:  mpan       |                  Owner:  michael
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:  FFmpeg
                Version:  git-       |               Keywords:  aac
  master                             |  regression
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
 When transcoding AAC to another format, output is distorted. I have
 noticed this situation only for one file (sample provided below), no other
 AACs I have tested seem to be affected. Also it seems that bug doesn't
 depend on output format.

 Everything was fine in 0.7.6. The problems started after update (from
 ArchLinux repo) to version N-34586-g33feba3. I have also tested this with
 the latest version from git and the problem persists.

 Files are available here: [http://mpan.pl/pub/ffmpeg-report/]
 Original sample:
 * test.aac
 Sample after conversion to pcm:
 * test-good.wav - version produced by 0.7.6
 * test-bad.wav - version produced by N-34586-g33feba3
 * test-latest.wav - version produced by N-34918-g4f7ad4c (latest)
 Corresponding logs:
 * test-good.log, test-bad.log, test-latest.log
 Smaller (1MB) versions of sample (just in case someone doesn't want to
 download the 8M ones):
 * short-*

 Linux 3.1.1-1-ARCH x86_64 Pentium(R) Dual-Core CPU E5300 @ 2.60GHz

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/662>
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