mythtv at cvs
Nov 7, 2009, 8:03 AM
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Ticket #7515: SRT subtitle timings wildly variable
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#7515: SRT subtitle timings wildly variable
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Reporter: tim@… | Owner: janne
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Video Playback | Version: unknown
Severity: medium | Mlocked: 0
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Trunk, revision 22760.
When playing a video file with accompanying SRT subtitles, the subtitle
timings are wildly variable. This is not apparent when comparing the
subtitle timecodes with the time displayed in myth when pausing, because
what is causing this problem is that the time displayed in myth is wrong,
having been calculated from an apparent fps which seems to be wandering
all over the place (because of A/V sync corrections). Note the video in
all these cases plays perfectly; no stutter, not too fast, not too slow,
so whatever the A/V sync is doing, it's obviously working :-)
The attached patch fixes the problem for me, and puts the subtitles right
back on the nail of where they're supposed to be.
It's quite possible there are unintended side effects since as far as I
can work out currentFrame->timecode is a long long whose size is therefore
not guaranteed, and it might wrap, but most of the time it's going to be
pretty big and not too many people watch movies many days long :-)
--
Ticket URL: <http://svn.mythtv.org/trac/ticket/7515>
MythTV <http://www.mythtv.org/>
MythTV
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