[mythtv-users] Mythtv 0.20 DVB-T (UK) subtitles lost during lossless transcode

John Pilkington J.Pilk at tesco.net
Wed Sep 27 12:37:46 UTC 2006


I reported this 'feature' on the ATrpms list.   I'm told it's unlikely 
to be a packaging issue.  It would be nice to have it disappear.

Subtitles are accessible on recordings from DVB-T, but are lost after a 
'lossless' transcode (done to make a permanent recording using a cutlist).

I'm running the latest version of Mythtv for FC5 downloaded today (27 
Sept 2006) from the ATrpms repo. The main package is 
mythtv-0.20-139.fc5.at.i386.rpm.

All other packages in the system are fully updated from the same source. 
  Kernel package is kernel-2.6.17-1.2187_FC5.i686.rpm.

I'm in the UK.  The DVB device is identified by the kernel as
dvb-usb: WideView WT-220U PenType Receiver (Typhoon/Freecom),
purchased as a Freecom DVB-T

Here's what appears to be the relevant portion of the output from 
mythbackend during a transcode.  The crucial line seems (to me) to be

> Skipping unsupported codec 3 on stream 2 

> stream: start_time: 56282.292 duration: 1827.152 bitrate=2643 kb/s
> 2006-09-27 10:28:35.889 AFD: Opened codec 0x841d2d0, id(MPEG2VIDEO) type(Video)
> 2006-09-27 10:28:35.911 AFD: Opened codec 0x841d780, id(MP3) type(Audio)
> 2006-09-27 10:28:35.911 AFD: Opened codec 0x841dcf0, id(DVB_SUBTITLE) type(Subtitle)
> 2006-09-27 10:28:35.912 AFD: Opened codec 0x841e2a0, id(MP3) type(Audio)
> 2006-09-27 10:28:35.948 Honoring the cutlist while transcoding
> 2006-09-27 10:28:35.950 Cutlist        : 0-2838,16036-21712,43112-45666
> 2006-09-27 10:28:35.950 Original Length: 45666 frames
> 2006-09-27 10:28:35.950 New Length     : 34598 frames
> 2006-09-27 10:28:35.991 New DB connection, total: 3
> 2006-09-27 10:28:35.992 Connected to database 'mythconverg' at host: localhost
> 2006-09-27 10:28:36.105 Switching to MPEG-2 transcoder.
> 2006-09-27 10:28:36.194 Opening /mnt/bigstore/FC5/2566_20060927093000.mpg
> 2006-09-27 10:28:36.195 Parser not found for Codec Id: 94212 !
> 2006-09-27 10:28:36.197 Parser not found for Codec Id: 94212 !
> 2006-09-27 10:28:36.223 Input #0, mpegts, from '/mnt/bigstore/FC5/2566_20060927093000.mpg':
> 2006-09-27 10:28:36.224   Duration: N/A, bitrate: N/A
> 2006-09-27 10:28:36.224   Stream #0.0[0x191]: Video: mpeg2video, yuv420p, 720x576, 15000 kb/s, 25.00 fps(r)
> 2006-09-27 10:28:36.224   Stream #0.1[0x192](eng): Audio: mp2, 48000 Hz, stereo, 192 kb/s
> 2006-09-27 10:28:36.224   Stream #0.2[0x193](eng): Subtitle: dvbsub
> 2006-09-27 10:28:36.225   Stream #0.3[0x194](eng): Audio: mp3
> 2006-09-27 10:28:36.225   Stream #0.4[0x195]: Data: 0x0000
> 2006-09-27 10:28:36.225   Stream #0.5[0x196]: Data: 0x0000
> 2006-09-27 10:28:36.225   Stream #0.6[0xbb8]: Data: 0x0000
> 2006-09-27 10:28:36.242 Skipping unsupported codec 3 on stream 2 *************************
> 2006-09-27 10:28:36.243 Skipping invalid audio stream: 3
> 2006-09-27 10:28:36.243 Skipping unsupported codec 2 on stream 4
> 2006-09-27 10:28:36.243 Skipping unsupported codec 2 on stream 5
> 2006-09-27 10:28:36.243 Skipping unsupported codec 2 on stream 6
> 2006-09-27 10:28:36.243 Warning: partial frame found!
> 2006-09-27 10:28:36.244 Warning: partial frame found! 

<snip>

> 2006-09-27 10:29:18.057 Opening /mnt/bigstore/FC5/2566_20060927093000.mpg.tmp
> 2006-09-27 10:29:18.117 Input #0, mpeg, from '/mnt/bigstore/FC5/2566_20060927093000.mpg.tmp':
> 2006-09-27 10:29:18.118   Duration: N/A, bitrate: N/A
> 2006-09-27 10:29:18.118   Stream #0.0[0x1e0]: Video: mpeg2video, yuv420p, 720x576, 15000 kb/s, 25.00 fps(r)
> 2006-09-27 10:29:18.118   Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, stereo, 192kb/s
> 2006-09-27 10:29:27.934 Transcode Completed 


Thanks for any help,

John Pilkington



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