[FFmpeg-trac] #5283(avcodec:new): Add bitstream filter to remove Closed Captions from h264
FFmpeg
trac at avcodec.org
Thu Mar 3 11:40:39 CET 2016
#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
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5283>
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