GPU acceleration, VLC vs CoreAVC

[bartgrefte]

Hi,

just now I tried so see how my computer is doing when it comes to 1080p material. For testing I used "Bird_42_MBit_ABR_( -1.5 MBit).mkv", that should be good enough for testing. I tried playing it with VLC Mediaplayer as well as Media Player Classic HC in combination with CoreAVC. Tried both with and without GPU acceleration, using the most recent versions.

The hardware: AMD A4-3400 (2,7GHz dualcore Llano APU), Gigabyte GA-A55M-S2HP motherboard, 8GB RAM and the HP W2408H as the monitor.
Windows 7 x64 as OS.

The impression I got: Looks like the CPU is too slow for that particular video-file, but with GPU acceleration enabled it plays fine in VLC (no dropped frames according to the statistics) but it is dropping some in Media Player Classic HC with CoreAVC.

Now I'm curious, CoreAVC uses DXVA2 as far as I know, not sure about VLC if it uses DXVA or DXVA2. Any idea what might explain that it runs perfect with GPU acceleration enabled in VLC but not run smoothly in Media Player Classic? Maybe it's just a setting or something or maybe the GPU acceleration in VLC works different, but I'd like to now.

With regards,

Bart Grefte

[VLC_help]

VLC only uses DXVA2.

And did you use latest CoreAVC?

[bartgrefte]

Okay.

CoreAVC 3.0.1, so yes, the latest.

[Jean-Baptiste Kempf]

And bench with bigger files.

[bartgrefte]

Do you happen to now any big(ger) files which have such a high bitrate?

Why would a bigger file make difference?

[Jean-Baptiste Kempf]

Higher bitrates, like 40Mbps would help test better.

[bartgrefte]

I was testing with a file that has a 42Mb bitrate, but I thought you said bigger, not a higher bitrate.

[Jean-Baptiste Kempf]

Sorry, my mistake

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