[FFmpeg-trac] #10179(undetermined:new): wavarc: 8-bit 0CPY is not lossless

FFmpeg trac at avcodec.org
Tue Feb 7 23:05:43 EET 2023


#10179: wavarc: 8-bit 0CPY is not lossless
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 https://trac.ffmpeg.org/raw-attachment/ticket/10174/8_33_M_C0.WA


 there is one difference between wa32.exe's output (decompressed input wav
 file) and ffmpeg's output

 ffmpeg's output has additional 0 at the end:

 {{{
 ./ffmpeg -i 8_33_M_C0.WA -f u8 -y out.raw
 ffmpeg version N-109772-gc56f5be678 Copyright (c) 2000-2023 the FFmpeg
 developers
   built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
   configuration:
   libavutil      57. 44.100 / 57. 44.100
   libavcodec     59. 63.100 / 59. 63.100
   libavformat    59. 38.100 / 59. 38.100
   libavdevice    59.  8.101 / 59.  8.101
   libavfilter     8. 56.100 /  8. 56.100
   libswscale      6.  8.112 /  6.  8.112
   libswresample   4.  9.100 /  4.  9.100
 Input #0, wavarc, from '8_33_M_C0.WA':
   Duration: N/A, start: 0.000000, bitrate: N/A
   Stream #0:0: Audio: wavarc (0CPY / 0x59504330), 33333 Hz, mono, u8p
 Stream mapping:
   Stream #0:0 -> #0:0 (wavarc (native) -> pcm_u8 (native))
 Press [q] to stop, [?] for help
 Output #0, u8, to 'out.raw':
   Metadata:
     encoder         : Lavf59.38.100
   Stream #0:0: Audio: pcm_u8, 33333 Hz, mono, u8, 266 kb/s
     Metadata:
       encoder         : Lavc59.63.100 pcm_u8
 size=     326kB time=00:00:09.98 bitrate= 267.1kbits/s speed= 694x
 video:0kB audio:326kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.000000%
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10179>
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