[FFmpeg-trac] #5038(avcodec:new): Warnings shown for correctly decoded TrueHD sample

FFmpeg trac at avcodec.org
Thu Nov 26 00:21:10 CET 2015


#5038: Warnings shown for correctly decoded TrueHD sample
--------------------------------------+---------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  minor       |              Component:  avcodec
                Version:  git-master  |               Keywords:  thd
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+---------------------------------
 http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/203994
 A user provided a TrueHD sample that correctly decodes to 0xFF but shows
 warnings.
 {{{
 $ ffmpeg -i warnings_cut.thd out.wav
 ffmpeg version N-76844-g3885ef0 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55.  9.100 / 55.  9.100
   libavcodec     57. 16.100 / 57. 16.100
   libavformat    57. 19.100 / 57. 19.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 15.100 /  6. 15.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 Input #0, truehd, from 'warnings_cut.thd':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Audio: truehd, 48000 Hz, 7.1, s32 (24 bit)
 Output #0, wav, to 'out.wav':
   Metadata:
     ISFT            : Lavf57.19.100
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 7.1,
 s16 (24 bit), 6144 kb/s
     Metadata:
       encoder         : Lavc57.16.100 pcm_s16le
 Stream mapping:
   Stream #0:0 -> #0:0 (truehd (native) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 05.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 08.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 0b.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 08.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 0f.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 08.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 0f.

 ...

 ...

 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 0c.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 09.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 0e.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 0f.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 04.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 03.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 0a.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 01.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 02.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 0a.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 09.
 [truehd @ 0x37a0440] Lossless check failed - expected 00, calculated 05.
 size=   37956kB time=00:00:50.60 bitrate=6144.0kbits/s
 video:0kB audio:37956kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.000262%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5038>
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