#2223: ffmpeg converts dvb_teletext to dvb_subtitle when -c copy is used
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Reporter: burek | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Comment (by Cigaes):
AFAICS, this is reproducible with the sample you uploaded for ticket 2086
[http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket2086/].
{{{
Input #0, mpegts, from '/tmp/teletextsubtitles.ts.part':
Duration: 00:00:15.36, start: 0.091256, bitrate: 15069 kb/s
Program 137
Stream #0:0[0x30]: Video: h264 (Main) ([27][0][0][0] / 0x001B),
yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
Stream #0:1[0x40](ita): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
5.1(side), fltp, 384 kb/s
Stream #0:2[0x41](und): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
5.1(side), fltp, 384 kb/s
Stream #0:3[0x6a](ita): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
Output #0, mpegts, to '/tmp/out.ts':
Metadata:
encoder : Lavf54.61.104
Stream #0:0(ita): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
Stream mapping:
Stream #0:3 -> #0:0 (copy)
}}}
{{{
Input #0, mpegts, from '/tmp/out.ts':
Duration: N/A, bitrate: N/A
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100](ita): Subtitle: dvb_subtitle ([6][0][0][0] /
0x0006)
}}}
I suspect this is a muxer problem: ffmpeg does not recode the subtitle
packets, it only incorrectly writes the nature of the stream.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2223#comment:2>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker
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