[FFmpeg-trac] #3919(undetermined:new): FFprobe reports incorrect bit depth for some WavPack files

[FFmpeg]

#3919: FFprobe reports incorrect bit depth for some WavPack files
-------------------------------------+-------------------------------------
             Reporter:               |                     Type:  defect
  ahthovaikied                       |                 Priority:  normal
               Status:  new          |                  Version:  git-
            Component:               |  master
  undetermined                       |               Blocked By:
             Keywords:  wavpack bit  |  Reproduced by developer:  0
  depth                              |
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Generate a 24bit wave file (or use any existing one):
 {{{
 $ sox -n -b 24 a.wav synth 30 sine 1k
 }}}

 Encode it with wavpack, default lossless compression:
 {{{
 $ wavpack -q a.wav -o a.wv
 }}}

 Check it's still 24bits:
 {{{
 $ wvunpack -q -ss a.wv

 file name:         a.wv
 file size:         2700306 bytes
 source:            24-bit ints at 48000 Hz
 channels:          1 (mono)
 duration:          0:00:30.00
 modalities:        lossless
 compression:       37.49%
 ave bitrate:       720 kbps
 encoder version:   4
 file wrapper:      80 byte RIFF header

 $ soxi a.wv

 Input File     : 'a.wv'
 Channels       : 1
 Sample Rate    : 48000
 Precision      : 24-bit
 Duration       : 00:00:30.00 = 1440000 samples ~ 2250 CDDA sectors
 File Size      : 2.70M
 Bit Rate       : 720k
 Sample Encoding: 24-bit WavPack
 }}}

 FFprobe report:
 {{{
 ffprobe -show_streams a.wv
 ffprobe version N-66050-g098af26 Copyright (c) 2007-2014 the FFmpeg
 developers
   built on Sep  2 2014 22:46:46 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
   configuration:
   libavutil      54.  7.100 / 54.  7.100
   libavcodec     56.  1.100 / 56.  1.100
   libavformat    56.  3.100 / 56.  3.100
   libavdevice    56.  0.100 / 56.  0.100
   libavfilter     5.  0.103 /  5.  0.103
   libswscale      3.  0.100 /  3.  0.100
   libswresample   1.  1.100 /  1.  1.100
 Input #0, wv, from 'a.wv':
   Duration: 00:00:30.00, start: 0.000000, bitrate: 720 kb/s
     Stream #0:0: Audio: wavpack, 48000 Hz, mono, '''s32p'''
 [STREAM]
 index=0
 codec_name=wavpack
 codec_long_name=WavPack
 profile=unknown
 codec_type=audio
 codec_time_base=1/48000
 codec_tag_string=[0][0][0][0]
 codec_tag=0x0000
 sample_fmt=s32p
 sample_rate=48000
 channels=1
 channel_layout=mono
 bits_per_sample=0
 id=N/A
 r_frame_rate=0/0
 avg_frame_rate=0/0
 time_base=1/48000
 start_pts=0
 start_time=0.000000
 duration_ts=1440000
 duration=30.000000
 bit_rate=N/A
 max_bit_rate=N/A
 nb_frames=N/A
 nb_read_frames=N/A
 nb_read_packets=N/A
 DISPOSITION:default=0
 DISPOSITION:dub=0
 DISPOSITION:original=0
 DISPOSITION:comment=0
 DISPOSITION:lyrics=0
 DISPOSITION:karaoke=0
 DISPOSITION:forced=0
 DISPOSITION:hearing_impaired=0
 DISPOSITION:visual_impaired=0
 DISPOSITION:clean_effects=0
 DISPOSITION:attached_pic=0
 [/STREAM]
 }}}

 Problematic part is {{{bits_per_sample=0}}} and {{{sample_fmt=s32p}}}.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3919>
FFmpeg <https://ffmpeg.org>
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