From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
Subject: [Bug 82255] New: [VP2] Chroma planes are vertically
stretched during VDPAU playback
Date: Wed, 06 Aug 2014 16:24:37 +0000
Message-ID:
Priority
medium
Bug ID
82255
Assignee
nouveau@lists.freedesktop.org
Summary
[VP2] Chroma planes are vertically stretched during VDPAU pla=
yback
Severity
normal
Classification
Unclassified
OS
All
Reporter
emil.l.velikov@gmail.com
Hardware
Other
Status
NEW
Version
unspecified
Component
Drivers/DRI/nouveau
Product
Mesa
Created attachment 104158 [details]
VDPAU_TRACE=3D1 vlc
Using VLC and flashplayer causes h264 video streams to be incorrectly rende=
red.
Both chroma planes are stretched and wrapped over vertically (x2) while the
luma plane seems correct.
Note: the issue does not appear with every h264 encoded clip and never happ=
ens
with mplayer (a bug in mplayer perhaps ?).
The following clip [1] is known to exhibit the issue, attaching VDPAU_TRACE=
=3D1
log of VLC playback.
How to enable/force VLC (v2.1.5) + VDPAU:
- Fire up VLC
- Navigate to Tools>Preferences>Input/Codecs
- Set "Hardware-accelerated decoding to VDPAU.
- Save and play a video.
If VDPAU is seemingly unused by VLC (high CPU usage), check the VLC log:
- Navigate to Tools>Messages
- Change the Verbosity level to "2(debug)". Elapsed events/messa=
ges with
higher level are not stored, as such you will need to restart playback.
Last minute update:
Interesting... seem like for every h264 clip that I can find, VLC exhibits =
this
problem. I have a sneaky suspicion that VLC is using xcb_xv for presentatio=
n,
which could have something to do with all this.
-Emil
[1] "Fantastic Four: Rise of the Silver Surfer =E2=80=93 720p Trailer&=
quot; from
http://www.h264info.com/clip=
s.html
http://downloads.dvdloc8.com/trailer=
s/divxdigest/fantastic_four_rise_of_the_silver_surfer-trailer.zip