[mythtv-users] Mythtranscode Lossless cut Changes

Justin Alcorn justin at jalcorn.net
Wed Nov 12 05:55:17 UTC 2014


I found --audiotrack but it doesn't seem to do anything - I tried
--audiotrack 0 and --audiotrack 1 both ended up with 2 audiotracks, and
they are swapped.

-- 
Justin B. Alcorn
PGP Fingerprint A36D D691 C5B0 BE15 5A2A AF49 AA1C 372C

On Tue, Nov 11, 2014 at 9:15 PM, Justin Alcorn <justin at jalcorn.net> wrote:

> Mythtv 0.28pre on Ubuntu 14.04.1
>
> I'm using a script to losslessly cut commercials out of my HRHomerun
> recordings.  The command used is quite simple:
>
> mythtranscode --honorcutlist -m -i ${INPUTFILE} -o ${WORKFILEBASE}.mpg
>
> Everything else in the script is mythutil cutlist or mythcommflag, or
> other things that don't change the file.  That's the only command that
> changes the file.
>
> When I record something off the local Fox affiliate, the default track,
> and the only one available for the MythTV Plex plugin, is the Audio Track
> for the visually impaired.  The first track has been swapped with the
> second.
>
> The original file looks like this to ffmpeg:
>
> mythtv at gossamer:~$ ffmpeg -i
> /var/lib/mythtv/recordings/3081_20141111010000.mpg.old  2>&1 | grep Stream
>     Stream #0:0[0x31]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
> yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 59.94 fps, 59.94 tbr, 90k tbn, 119.88
> tbc
>     Stream #0:1[0x34](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
> stereo, fltp, 448 kb/s
>     Stream #0:2[0x35](spa): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
> stereo, fltp, 192 kb/s
>
>
> mythtv at gossamer:~$ ffmpeg -i
> /var/lib/mythtv/recordings/3081_20141111010000.mpg  2>&1 | grep Stream
>     Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 1280x720 [SAR
> 1:1 DAR 16:9], 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
>     Stream #0:1[0x81]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
>     Stream #0:2[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
>
> That's a lot of changes, not just cutting out commercials.  I found some 6
> year old bug reports that said that the issue of mythtranscode swapping teh
> audio tracks was solved in 0.21, but either we've got a regression bug or
> something really weird is happening to me.
> --
> Justin B. Alcorn
> PGP Fingerprint A36D D691 C5B0 BE15 5A2A AF49 AA1C 372C
>
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