[mythtv-users] Transcode UK Terrestrial HD content.‏

[Another Sillyname]

..............trimmed
>
>> > Have you tried to play the saved HD files using either mplayer, ffmpeg
>> > or VLC
>> > What do you get?
>
> Yes the recordings play with mplayer, ffmpeg and vlc.
>
> From ffplay
> Input #0, mpegts, from '1050_20120601160000.mpg':
>   Duration: 00:04:58.10, start: 32082.077733, bit rate: 7985 kb/s
>   Program 1
>     Stream #0:0[0x19c9]: Video: h264 (High) ([27][0][0][0] / 0x001B),
> yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 40.61 fps, 50 tbr, 90k tbn, 50 tbc
>     Stream #0:1[0x19ca](eng): Audio: aac_latm ([17][0][0][0] / 0x0011),
> 48000 Hz, stereo, s16
>     Stream #0:2[0x19ce](eng): Audio: aac_latm ([17][0][0][0] / 0x0011),
> 48000 Hz, stereo, s16 (visual impaired)
>     Stream #0:3[0x19cd](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
>     Stream #0:4[0x19fa]: Unknown: none ([5][0][0][0] / 0x0005)
>     Stream #0:5[0x19d2]: Unknown: none ([11][0][0][0] / 0x000B)
>     Stream #0:6[0x6f]: Unknown: none ([11][0][0][0] / 0x000B)
>
> If it helps I can provide outputs from everything else and perhaps mediainfo
> ?
>

I wasn't aware that DVB-T2 was transmitting audio in an AAC format,
DVB-S still transmits as either AC3 or MP3. As I'm still running .23
fixes could someone confirm that the later versions of transcode
handle AAC?

I, like some others, ended up writing my own scripts to transcode
BBC/ITV HD as I wanted to transcode into 720P while still retaining
AC3 if it was presented (although ITV seem to have not found the AC3
button yet).  The reason to retain AC3 was I use an external amp with
AC3 that is connected via an optical SPDIF cable, I think some newer
amps now support AAC surround(?) but it seemed silly to upgrade when
everything else was working fine.

If this homebrew script is of any use for your own testing let me know
and I'll happily let you have a copy.

The ITV transcodes are admittedly a bit 'cludgy' as the script looks
for the nearest keyframe to where you marked for the cut and makes the
cut there, this is due to my lack of experience with handling H264
streams as I couldn't see a way to make the file cut on an exact frame
so instead my script chops the target file up into 'retained' segments
and then process's them before recombining them into a mkv container.