Public bug reported:
Binary package hint: mythtv
When playing videos using MythVideo on my local hard drive, the
situation frequently occurs that mythtv will set the video scan to
"Interlaced" and lock it there, causing frame stuttering and flickering.
This is in a progressive stream.
I've managed to narrow down what's happening, and it seems whenever the
stream switches from 24000/1001 to 30000/1001 frames, myth thinks the
stream is interlaced. Problem is, when the frame rate goes back, myth
never sets the video scan back to progressive, so I end up with
deinterlacing applied to a progressive stream.
I made a quick patch to the source code that for me fixes the problem:
--- libs/libmythtv/NuppelVideoPlayer.cpp-orig 2010-04-17 12:38:32.799073334
-0700
+++ libs/libmythtv/NuppelVideoPlayer.cpp 2010-04-17 12:38:43.867081365
-0700
@@ -989,7 +989,6 @@
{
VERBOSE(VB_PLAYBACK, LOC + "Locking scan to Interlaced.");
SetScanType(kScan_Interlaced);
- return;
}
}
m_scan_tracker++;
However, this change was implemented in revision 22121 of mythtv in
response to this mailing list post:
http://mythtv.org/pipermail/mythtv-dev/2009-October/066439.html
So, I don't imagine this is a good fix. Better would be to fix mythtv's
handling of frame rate changes.
For reference, this is on the latest beta release of Mythbuntu 10.04.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: libmyth-0.23-0 0.23.0+fixes24158-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Sat Apr 17 12:32:34 2010
InstallationMedia: Mythbuntu 10.04 "Lucid Lynx" - Beta i386 (20100318)
Installed_mythplugins-dbg: 0.0
Installed_mythtv-dbg: 0.0
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: mythtv
** Affects: mythbuntu
Importance: Undecided
Status: New
** Affects: mythtv (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 lucid
--
MythTV incorrectly detects interlaced stream on progressive content
https://bugs.launchpad.net/bugs/565557
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