[mythtv-users] Seeking problems with RTJPEG->MPEG4 transcoded files
tcfelker at mtco.com
Fri Jul 8 00:42:24 EDT 2005
I just upgraded from MythTV 0.15 to 0.18.1, and the frontend is having
problems seeking. If you don't seek, everything plays fine, but when you
skip forward, it either just shows a black screen or skips forward way too
far (41 minutes seems common). If you then skip back into the gulf, it hangs
briefly and then resumes playback at where it first skipped to. If you skip
forward, it hangs. Thankfully, I can always press Escape to get back to the
I record in RTJPEG due to a slow computer, and then transcode to MPEG4.
Nothing else, I don't cut commercials by hand or do any editing before
transcoding. The problem doesn't effect files that haven't been transcoded.
Scouring over verbose output from mythfrontend, one difference is that the bad
output has some messages like the following. (I could post full outputs, but
2005-07-07 23:16:44.246 DoFastForward: Not enough info in positionMap, we need
frame 75867 but highest we have is 32880
2005-07-07 23:16:44.429 SyncPositionMap prerecorded, from DB: 1097 entries
2005-07-07 23:16:44.429 DoFastForward: Still Not enough info in positionMap,
we need frame 75867 but highest we have is 32880. Will seek frame-by-frame
It may just be correlation, but just now deleting one of the affected shows
seems to have caused other affected shows to work fine, for the time being.
Probably unrelated, but mythbackend does crash from time to time.
I've seen similar problems in the mailing list archives, but these referred to
older versions, so this may be a new problem or perhaps the old ones weren't
Anyway, that's about all the info I have for now. At the moment I'm fine just
not transcoding. Any help would be appreciated, though.
Tom Felker, <tcfelker at mtco.com>
<http://vlevel.sourceforge.net> - Stop fiddling with the volume knob.
Life is like an analogy.
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