[mythtv-users] UK DVB-T Channels 4, 5; multiple video streams

[John Pilkington]

On 04/06/13 12:26, John Pilkington wrote:
> Last week the BBC mux from my local transmitter was moved to clear G4
> spectrum.  Since then my recordings from Channels 4 and 5 have
> apparently included multiple video streams.  This breaks my cutting
> script.  A simple edit ought to fix that, but has anything else changed
> too?
>
> $ ionice -c3 mythffmpeg -i  1005_20130603185800.mpg
> ffmpeg version 0.10.2.git Copyright (c) 2000-2012 the FFmpeg developers
>    built on Apr 27 2013 17:23:40 with gcc 4.7.2 20120921 (Red Hat 4.7.2-2)

<snip>

> Input #0, mpegts, from '1005_20130603185800.mpg':
>    Duration: 01:07:58.37, start: 51087.044133, bitrate: 2824 kb/s
>      Stream #0:0[0xb22]: Video: mpeg2video (Main), yuv420p, 704x576 [SAR
> 16:11 DAR 16:9], 15000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
>      Stream #0:1[0xb23](eng): Audio: mp2, 48000 Hz, stereo, s16, 192 kb/s
>      Stream #0:2[0xb25](eng): Audio: mp2, 48000 Hz, mono, s16, 64 kb/s
>      Stream #0:3[0xb24](eng): Subtitle: dvb_subtitle
>      Stream #0:4[0x806]: Video: mpeg2video, 90k tbr, 90k tbn, 90k tbc
>      Stream #0:5[0x8cb]: Video: mpeg2video, 90k tbr, 90k tbn, 90k tbc
>      Stream #0:6[0x8cc]: Video: mpeg2video, 90k tbr, 90k tbn, 90k tbc

mediainfo --version
MediaInfo Command line,
MediaInfoLib - v0.7.52

mediainfo sees only the expected first four streams, with nothing 
conspicuously wrong.  I guess mythffmpeg just picked a bad sampling 
region, but I don't remember seeing results like this before.