View Issue Details
ID | Project | Category | View Status | Date Submitted | Last Update |
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0000163 | madVR | bug | public | 2014-02-27 15:18 | 2014-03-03 19:14 |
Reporter | lolly | Assigned To | madshi | ||
Priority | normal | Severity | minor | Reproducibility | sometimes |
Status | closed | Resolution | no change required | ||
Platform | x86 | OS | Windows XP Pro | OS Version | 5.1.2600 (SP3) |
Summary | 0000163: changing some rendering settings during playback may trigger banding and other problems | ||||
Description | Starting to play colors.ytp and then changing rendering settings (debanding, smooth motion, output levels, scaling algorithm, anti ringing, probably more) occasionally causes banding for me. This may also cause blackness or flickering playback (probably depending on the state of the smooth motion setting), which is occasionally fixable by toggling fullscreen playback. The attached picture shows what colors.ytp looks like before (top) and after (bottom) triggering the banding issue (nb: both caps taken with debanding set to "off"; tweaked in an image editor to make the issue more obvious). Seems to be consistently reproducible only if I have more than one video open. Probably related to running out of video memory. | ||||
Tags | No tags attached. | ||||
madVR Version | 0.87.4 final Dither 3 | ||||
Media Player (with version info) | MPC-HC (Nightly) 1.7.3.45 | ||||
Splitter (with version info) | madTestPatternSource 1.3.0.0 | ||||
Decoder (with version info) | madTestPatternSource 1.3.0.0 | ||||
Decoding | Software | ||||
Deinterlacing | none (progressive) | ||||
DXVA2 Scaling Active | no | ||||
Aero / Desktop Composition | Off | ||||
Problem occurs with mode | all modes | ||||
GPU Manufacturer | NVidia | ||||
GPU Model | GTS 8800 320 MB (G80) | ||||
GPU Driver Version | 332.21 | ||||
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Yes, it could very well be related to running out of GPU RAM. I'm not sure if there's much I can do about it. I guess I could handle it more gracefully if Direct3D reports problems, but other than that I don't know what to change. Have you tried lowering the GPU queue size and maybe the number of pre-presented frames in the fullscreen exclusive mode section, and the number of backbuffers in the windowed mode section? |
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Lowering these settings to their respective minima allows me to play more videos simultaneously before I can consistently reproduce the issue (for example five instances of colors.ytp at otherwise identical settings), so yeah, low GPU RAM issue it is. The issue does not spread across player instances, but on the other hand I did not manage to make it go away by closing the other instances and playing with rendering settings for the affected instance. |
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Hmmmm... Ok. So is there anything I can do about this? Right now I don't know what... |
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I'd say there's no pressing NEED to do anything about this, as low on memory / out of memory cannot be considered normal conditions a renderer should work under, but I figured maybe it is interesting for you to see where and how this happens (and maybe why madVR never recovers from this issue, unless playback is restarted completely). |
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Ok, I'll close this one for now. At some point I'll probably revisit the way I'm handling Direct3D error states, which may improve the behaviour. But not soon. |
Date Modified | Username | Field | Change |
---|---|---|---|
2014-02-27 15:18 | lolly | New Issue | |
2014-02-27 15:18 | lolly | File Added: colors issue+contrast.png | |
2014-03-02 12:16 | madshi | Note Added: 0000399 | |
2014-03-02 12:16 | madshi | Assigned To | => madshi |
2014-03-02 12:16 | madshi | Status | new => feedback |
2014-03-02 19:45 | lolly | Note Added: 0000402 | |
2014-03-02 19:45 | lolly | Status | feedback => assigned |
2014-03-03 15:08 | madshi | Note Added: 0000405 | |
2014-03-03 15:08 | madshi | Status | assigned => feedback |
2014-03-03 19:09 | lolly | Note Added: 0000408 | |
2014-03-03 19:09 | lolly | Status | feedback => assigned |
2014-03-03 19:13 | madshi | Note Added: 0000409 | |
2014-03-03 19:14 | madshi | Status | assigned => closed |
2014-03-03 19:14 | madshi | Resolution | open => no change required |