mplayer2 vdpau stuttering video after pause/unpause

jcflack · n00b Joined: 22 Feb 2014 Posts: 4

Hi,

I'm running into an issue that has also been reported on an archlinux forum.

If I pause and then unpause a video in mplayer2, using vdpau, the audio resumes perfectly, mplayer2 does not show any error or any sign of anything wrong, but the video stutters badly. It will show a fraction of a second of motion, freeze for several seconds, another blip of motion, another long freeze, and so on, and eventually it catches up and renders smoothly again. I'm not 100% sure, but where it eventually catches up often seems to coincide with a change of camera angle, as if the decoding gets out of sync and can only try to catch up at a keyframe. (But it doesn't catch up at the very next keyframe, anyway, it seems to take several. In a lot of my tests it seems to be four. Maybe it's always four.)

I don't see a bug filed on mplayer2's tracker, or in gentoo's bugzilla. Between mplayer2, vdpau, mesa, and radeon drivers, there seem to be a lot of places the trouble could be, so I guess I'm looking for ideas on the best/most likely place the issue should be reported.

Anyone else seeing this?

Thanks,
-Chap

Logicien · Posted: Sat Feb 22, 2014 4:40 pm Post subject:

Hi,
just after reading your post, I emerge Mplayer2. Than I played an Avi file in a graphical virtual terminal with

jcflack · n00b Joined: 22 Feb 2014 Posts: 4

Hi,

Thanks for the tips. I do have gallium eselected for mesa and xorg-x11 for opengl, as you have. I haven't yet compared every last mplayer2 USE flag to yours ... it would be nice to have more idea which ones might plausibly be related to the issue, which I don't have yet.

I do notice that the video I was playing was encoded in H.264, and yours in msmpeg4, and you also had a postprocessing filter of some sort and a compositing window manager that vdpau remarked on. I'm not sure how those differences would affect how the player interacts with the hardware.

However, just now I have looked around and found a Quicktime (SVQ3) and an mpeg2 video to try, and for me they also stutter when unpaused.

I think you've got a rather newer radeon than mine - what firmware does it load? (Juniper, for mine.)

Thanks,
-Chap

jcflack · n00b Joined: 22 Feb 2014 Posts: 4

Hmm, also same stuttering on another box with a newer radeon chipset.

First box I described:
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Juniper PRO [Radeon HD 5750]

Second box:
01:00.0 VFA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series]

It loads CAICOS firmware.

-Chap

Logicien · Posted: Sat Feb 22, 2014 10:29 pm Post subject:

My firmware is ARUBA. Is KMS (Kernel Mode Setting) in use? This is what this command return to me

jcflack · n00b Joined: 22 Feb 2014 Posts: 4

dmesg | grep -i setting
[ 43.321539] [drm] radeon kernel modesetting enabled.
[ 43.321764] [drm] initializing kernel modesetting (JUNIPER 0x1002:0x68BE 0x1787:0x2287).

grep -i kms /var/log/Xorg.0.log
[ 69.176] (II) [KMS] Kernel modesetting enabled.
[ 69.185] (II) RADEON(0): KMS Color Tiling: enabled
[ 69.186] (II) RADEON(0): KMS Color Tiling 2D: enabled
[ 69.186] (II) RADEON(0): KMS Pageflipping: enabled

glxinfo | less
hmm, I guess I'll have to emerge mesa-progs for that.

cat /proc/cmdline
BOOT_IMAGE=(hd0,gpt2)/boot@/bzImage-3.10.25-gentoo root=zfs:xxx/root radeon.audio=1

-Chap