[FFmpeg-trac] #2223(undetermined:new): ffmpeg converts dvb_teletext to dvb_subtitle when -c copy is used
FFmpeg
trac at avcodec.org
Fri Feb 1 20:32:22 CET 2013
#2223: ffmpeg converts dvb_teletext to dvb_subtitle when -c copy is used
-------------------------------------+-------------------------------------
Reporter: burek | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: | undetermined
unspecified | Keywords:
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
-------------------------------------+-------------------------------------
Summary of the bug:
When ffmpeg is instructed to do "-c copy" on input stream, it unexpectedly
converts one of the input streams of type dvb_teletext into dvb_subtitle.
More info can be found here:
http://ffmpeg.gusari.org/viewtopic.php?f=16&t=811&p=1527
How to reproduce:
The original scenario, where the possible bug was discovered, used a
command line like this:
{{{
ffmpeg -i udp://234.5.245.105:20000 -map 0 -codec copy -f mpegts stream.ts
ffmpeg version 1.1.1 Copyright (c) 2000-2013 the FFmpeg developers
built on Jan 21 2013 14:57:54 with gcc 4.6.1 (Ubuntu/Linaro
4.6.1-9ubuntu3)
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora
--enable-libvorbis --enable-libx264 --enable-nonfree --enable-postproc
--enable-version3 --enable-x11grab --enable-filter=movie --enable-static
--enable-shared --enable-libfreetype --enable-libaacplus
libavutil 52. 13.100 / 52. 13.100
libavcodec 54. 86.100 / 54. 86.100
libavformat 54. 59.106 / 54. 59.106
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 32.100 / 3. 32.100
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[mpegts @ 0x1b5c820] Unable to seek back to the start
[mpeg2video @ 0x1ba2220] 0x0 is invalid
Last message repeated 15 times
[mpegts @ 0x1b5c820] max_analyze_duration 5000000 reached at 5016000
[mpegts @ 0x1b5c820] Estimating duration from bitrate, this may be
inaccurate
Input #0, mpegts, from 'udp://234.5.245.105:20000':
Duration: N/A, start: 93705.929667, bitrate: 224 kb/s
Program 140
Metadata:
service_name : ANTENA 3
service_provider: EtherTV
Stream #0:0[0x137](spa): Subtitle: dvb_subtitle ([6][0][0][0] /
0x0006)
Stream #0:1[0x130](und): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
stereo, s16p, 96 kb/s
Stream #0:2[0x12f](spa): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
stereo, s16p, 128 kb/s
Stream #0:3[0x12e](spa): [b]Subtitle: dvb_teletext[/b] ([6][0][0][0] /
0x0006)
Stream #0:4[0x12d]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
yuv420p, 704x576 [SAR 16:11 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
Output #0, mpegts, to 'stream.ts':
Metadata:
encoder : Lavf54.59.106
Stream #0:0(spa): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Stream #0:1(und): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
stereo, 96 kb/s
Stream #0:2(spa): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
stereo, 128 kb/s
Stream #0:3(spa): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
Stream #0:4: Video: mpeg2video ([2][0][0][0] / 0x0002), yuv420p,
704x576 [SAR 16:11 DAR 16:9], q=2-31, 25 fps, 90k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Stream #0:2 -> #0:2 (copy)
Stream #0:3 -> #0:3 (copy)
Stream #0:4 -> #0:4 (copy)
Press [q] to stop, [?] for help
frame= 914 fps= 29 q=-1.0 Lsize= 17315kB time=00:00:37.79
bitrate=3753.4kbits/s
video:13770kB audio:1013kB subtitle:1173 global headers:0kB muxing
overhead 8.519125%
Received signal 2: terminating.
}}}
but when checked with ffprobe, the result was:
{{{
ffprobe -i stream.ts
ffprobe version 1.1.1 Copyright (c) 2007-2013 the FFmpeg developers
built on Jan 21 2013 14:57:54 with gcc 4.6.1 (Ubuntu/Linaro
4.6.1-9ubuntu3)
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora
--enable-libvorbis --enable-libx264 --enable-nonfree --enable-postproc
--enable-version3 --enable-x11grab --enable-filter=movie --enable-static
--enable-shared --enable-libfreetype --enable-libaacplus
libavutil 52. 13.100 / 52. 13.100
libavcodec 54. 86.100 / 54. 86.100
libavformat 54. 59.106 / 54. 59.106
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 32.100 / 3. 32.100
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[mpegts @ 0xac2ca0] max_analyze_duration 5000000 reached at 5016000
[NULL @ 0xac6e60] start time is not set in estimate_timings_from_pts
[NULL @ 0xac8be0] start time is not set in estimate_timings_from_pts
Input #0, mpegts, from 'stream.ts':
Duration: 00:00:37.47, start: 1.760378, bitrate: 3785 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100](spa): Subtitle: dvb_subtitle ([6][0][0][0] /
0x0006)
Stream #0:1[0x101](und): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
stereo, s16p, 96 kb/s
Stream #0:2[0x102](spa): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
stereo, s16p, 128 kb/s
Stream #0:3[0x103](spa): [b]Subtitle: dvb_subtitle[/b] ([6][0][0][0] /
0x0006)
Stream #0:4[0x104]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
yuv420p, 704x576 [SAR 16:11 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2223>
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