[mythtv] h.264 multithreading
reidjr at btconnect.com
Sun Dec 2 11:47:30 UTC 2007
Tom Lichti wrote:
> John wrote:
>> I think a "make distclean" should sort this out. The consolidated
>> patch Riz posted works as advertised against trunk.
>> For the record, the difference between the consolidated patch Riz
>> has kindly put together and the one I originally posted
>> is that it was turned on and off by a database switch. If you always
>> want to skip the loopfilter (deblocking off) then this consolidated
>> patch is far easier.
Came across a problem playing some DVDs, menu was OK, but "play the
Movie" lead to a segfault in mythfrontend. After much fumbling around I
found it doesn't appear in a clean SVN checkout. Traced it back to the
Multi threading patch 0001-enable-multithreaded-video-stream-decoding.patch
I don't have the skills to work out why this is causing the segfault,
but a small change to only enable multi threading on H264 fixed the
immediate problem. I am working on the basis that if you are messing
around with H264 Multi threading you do not need to worry about multi
threading to play SD DVDs ;-).
Doh !!! was just about to post my hack, then when I produced the diff of
Riz's consolidated patch, I see that it already does a test for H264
before applying multi threading.
I'll post anyway, so Janne picks the issue up for future multithread
updates to trunk.
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