[FFmpeg-trac] #5283(avcodec:new): Add bitstream filter to remove Closed Captions from h264

[FFmpeg]

#5283: Add bitstream filter to remove Closed Captions from h264
---------------------------------------+---------------------------------
               Reporter:  cehoyos      |                  Owner:
                   Type:  enhancement  |                 Status:  new
               Priority:  wish         |              Component:  avcodec
                Version:  git-master   |               Keywords:  h264 cc
             Blocked By:               |               Blocking:
Reproduced by developer:  0            |  Analyzed by developer:  0
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 http://thread.gmane.org/gmane.comp.video.ffmpeg.user/61438/focus=61440
 The sample from ticket #2885 contains Closed Captions, FFmpeg does not
 allow to remove them without reencoding.
 {{{
 $ ffmpeg -i transformers.ts -vcodec copy out.h264
 ffmpeg version N-78869-gdd2ea5c Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 19.100 / 55. 19.100
   libavcodec     57. 27.101 / 57. 27.101
   libavformat    57. 27.102 / 57. 27.102
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 38.100 /  6. 38.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 Input #0, mpegts, from 'transformers.ts':
   Duration: 00:01:59.29, start: 0.578456, bitrate: 9015 kb/s
   Program 1
     Stream #0:0[0x1e1]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuvj420p(pc), 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 29.97 fps,
 29.97 tbr, 90k tbn, 59.94 tbc
     Stream #0:1[0x1e2]: Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz,
 5.1(side), fltp, 384 kb/s
 Output #0, h264, to 'out.h264':
   Metadata:
     encoder         : Lavf57.27.102
     Stream #0:0: Video: h264 ([27][0][0][0] / 0x001B), yuvj420p, 1920x1080
 [SAR 1:1 DAR 16:9], q=2-31, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 frame= 3575 fps=0.0 q=-1.0 Lsize=  118242kB time=00:01:59.25
 bitrate=8122.6kbits/s speed= 580x
 video:118291kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}
 {{{
 $ ffmpeg -i out.h264
 ffmpeg version N-78869-gdd2ea5c Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 19.100 / 55. 19.100
   libavcodec     57. 27.101 / 57. 27.101
   libavformat    57. 27.102 / 57. 27.102
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 38.100 /  6. 38.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 [h264 @ 0x3a8c280] Stream #0: not enough frames to estimate rate; consider
 increasing probesize
 Input #0, h264, from 'out.h264':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: h264 (High), yuvj420p(pc), 1920x1080 [SAR 1:1 DAR
 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 1200k tbn, 59.94 tbc
 At least one output file must be specified
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5283>
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