Opened 14 years ago
Closed 14 years ago
#7968 closed defect (invalid)
vdpau: excessive cpu usage playing mpeg2 files
| Reported by: | anonymous | Owned by: | markk |
|---|---|---|---|
| Priority: | minor | Milestone: | 0.23 |
| Component: | MythTV - Video Playback | Version: | head |
| Severity: | medium | Keywords: | |
| Cc: | Ticket locked: | no |
Description
I'm using trunk r23312 and did not see this issue with a checkout about two weeks ago before the recent vdpau changes.
Playing h264 content, my cpu usage is 1-2% as expected. When playing mpeg2 (hdhr and fw stb recordings), my cpu usage is about 22%. Using the ffmpeg decoder, cpu jumps to 55%. Logs show vdpau is being used and there is a definite difference between vdpau and ffmpeg decoders.
I'm attaching logs with '-v most'. The mpeg 2 log is tv.log and the h264 is video.log. My nvidia drivers are 195.30 and my card is a 9400 GT (G96) with 1GB.
Attachments (1)
Change History (6)
comment:1 Changed 14 years ago by
| Owner: | changed from Janne Grunau to markk |
|---|---|
| Status: | new → accepted |
comment:2 Changed 14 years ago by
| Milestone: | unknown → 0.23 |
|---|---|
| Status: | accepted → infoneeded |
comment:3 Changed 14 years ago by
I'm fairly certain mpeg2 cpu was in the 1-4% range previously. I'll try to find some time this weekend to revert to the older revision and report back.
comment:4 Changed 14 years ago by
Go ahead and close this. Reverting showed similar performance.
Perhaps this is what you mentioned in a different ticket about the 195.30 drivers.
comment:5 Changed 14 years ago by
| Resolution: | → invalid |
|---|---|
| Status: | infoneeded → closed |
Closed at submitters request. Thanks for confirming.
The G96 core only supports partial acceleration of mpeg2 and hence cpu utilisation is not expected to be as low as for h264. Can you actually see a significant performance regression? ie. compared to trunk before the new VDPAU code.