[mythtv-commits] Ticket #12004: Short seeks intolerably slow with HDPVR and vdpau
MythTV
noreply at mythtv.org
Sun Jul 13 17:27:07 UTC 2014
#12004: Short seeks intolerably slow with HDPVR and vdpau
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Reporter: mythtv@… | Owner: stichnot
Type: Bug Report - General | Status: closed
Priority: minor | Milestone: unknown
Component: MythTV - Video Decoding | Version: 0.27-fixes
Severity: medium | Resolution: fixed
Keywords: | Ticket locked: 0
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Changes (by Jim Stichnoth <jstichnoth@…>):
* status: accepted => closed
* resolution: => fixed
Comment:
In [changeset:"33acfaf30747592b9fca0913b2c2f8832418d618/mythtv"]:
{{{
#!CommitTicketReference repository="mythtv"
revision="33acfaf30747592b9fca0913b2c2f8832418d618"
Make seeks faster for slow decoders / large keyframe distances.
Exact seeking for HD-PVR recordings can be notoriously slow because
the keyframe distance is 128 frames and decoding (even GPU hardware
decoding) is often little faster than real-time.
In most cases, it's a much better user experience to make a less
accurate but much faster seek to the preceding keyframe.
There are two changes:
1. Impose a maximum wall-clock time on the forward frame-by-frame
seeking. After this maximum time elapses, abort any further frame
seeking.
2. In addition, try to predict whether fully accurate seeking will
complete within a reasonable time, and if after a few frames it seems
hopeless, just don't bother seeking any further.
This approach allows fast decoders and video formats amenable to fast
decoding to continue to have exact seeking.
Fixes #12004.
}}}
--
Ticket URL: <https://code.mythtv.org/trac/ticket/12004#comment:7>
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