[FFmpeg-trac] #1158(undetermined:new): allow use of flac's --keep-foreign-metadata when encoding or decoding flac format

[FFmpeg]

#1158: allow use of flac's --keep-foreign-metadata when encoding or decoding flac
format
-------------------------------------+-------------------------------------
             Reporter:  dericed      |                     Type:
               Status:  new          |  enhancement
            Component:               |                 Priority:  normal
  undetermined                       |                  Version:  git-
             Keywords:  flac,        |  master
  metadata                           |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 This sample file contains metadata in a bext chunk and iXML chunk.

 http://www.gallery.co.uk/ixml/examples/usesEntireiXMLSpec.WAV

 With the flac utility there is an option called --keep-foreign-metadata
 that allows these chunks to be copied to the flac output. When I use
 ffmpeg to transcode the wav to a flac file there is no means to keep the
 bext chunk or ixml chunk of source file.


 {{{
 ffmpeg -i usesEntireiXMLSpec.WAV usesEntireiXMLSpec.flac
 ffmpeg version N-35765-gf9143d2 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Mar 31 2012 12:44:33 with llvm_gcc 4.2.1 (Based on Apple Inc.
 build 5658) (LLVM build 2335.15.00)
   configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --enable-shared
 --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables
 --enable-libfreetype --cc=/usr/bin/llvm-gcc --enable-libx264 --enable-
 libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis
 --enable-libvpx --enable-libxvid --enable-libopencore-amrnb --enable-
 libopencore-amrwb --enable-libass --disable-ffplay
   libavutil      51. 44.100 / 51. 44.100
   libavcodec     54. 12.100 / 54. 12.100
   libavformat    54.  3.100 / 54.  3.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 66.101 /  2. 66.101
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 10.100 /  0. 10.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, wav, from 'usesEntireiXMLSpec.WAV':
   Metadata:
     comment         : gSCENE=66a
                     : gTAKE=002
                     : gTAPE=007
                     : gNOTE=Circle
                     : gUBITS=00000000
                     :
     encoded_by      : Gallery Metacorder
     date            : 2005:08:04
     creation_time   : 16:55:54
     time_reference  : 4090608000
     coding_history  :
   Duration: 00:00:02.18, bitrate: 781 kb/s
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 1
 channels, s16, 768 kb/s
 Output #0, flac, to 'usesEntireiXMLSpec.flac':
   Metadata:
     comment         : gSCENE=66a
                     : gTAKE=002
                     : gTAPE=007
                     : gNOTE=Circle
                     : gUBITS=00000000
                     :
     encoded_by      : Gallery Metacorder
     date            : 2005:08:04
     creation_time   : 16:55:54
     time_reference  : 4090608000
     coding_history  :
     encoder         : Lavf54.3.100
     Stream #0:0: Audio: flac, 48000 Hz, 1 channels, s16, 128 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_s16le -> flac)
 Press [q] to stop, [?] for help
 size=      42kB time=00:00:02.20 bitrate= 155.8kbits/s
 video:0kB audio:34kB global headers:0kB muxing overhead 24.469009%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1158>
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