Higher CPU usage with hardware decoding.

[dE_logics]

Hello everyone!

First I'd a very bad time registering here. IT appears the admin has blocked all of the 4b ip4 addresses... which's actually ineffective.

Anyway, I've enabled hardware acceleration in the codec section but the cpu usage, while decoding h264 videos doubles on doing so, i.e. software decoding is more efficient.

I've libva installed with intel backend on core i3. vainfo is also ok with the hardware.

Code: Select all

$ vainfo libva: VA-API version 0.32.0 libva: va_getDriverName() returns 0 libva: Trying to open /usr/lib64/va/drivers/i965_drv_video.so libva: va_openDriver() returns 0 vainfo: VA-API version: 0.32 (libva 1.0.15) vainfo: Driver version: Intel i965 driver - 1.0.15 vainfo: Supported profile and entrypoints VAProfileMPEG2Simple : VAEntrypointVLD VAProfileMPEG2Main : VAEntrypointVLD VAProfileH264Baseline : VAEntrypointVLD VAProfileH264Baseline : VAEntrypointEncSlice VAProfileH264Main : VAEntrypointVLD VAProfileH264Main : VAEntrypointEncSlice VAProfileH264High : VAEntrypointVLD VAProfileH264High : VAEntrypointEncSlice VAProfileVC1Simple : VAEntrypointVLD VAProfileVC1Main : VAEntrypointVLD VAProfileVC1Advanced : VAEntrypointVLD

On running vlc -vvvv --

http://pastebin.com/gveEh8q1

Mplayer vaapi on the other hand, decodes it with 0 cpu usage.

I've mailed the same message to the VLC users mailing list, but the list appears to be dead.

Thanks for any response!

[Jean-Baptiste Kempf]

First I'd a very bad time registering here. IT appears the admin has blocked all of the 4b ip4 addresses... which's actually ineffective.

We use several IP blacklists.

Anyway, I've enabled hardware acceleration in the codec section but the cpu usage, while decoding h264 videos doubles on doing so, i.e. software decoding is more efficient.

Probably because of the callback is too slow, on your machine.

[dE_logics]

Sorry for the late response, couldn't log in (using phone's net connection instead)

First I'd a very bad time registering here. IT appears the admin has blocked all of the 4b ip4 addresses... which's actually ineffective.

We use several IP blacklists.

Don't you think blocking by IP is a bad idea? It a Windows user's account gets hacked, logs in and sends Spam, it's his/her problem, you should block the account and say it's his/her fault cause they're using Windows.

Anyway, I've enabled hardware acceleration in the codec section but the cpu usage, while decoding h264 videos doubles on doing so, i.e. software decoding is more efficient.

Probably because of the callback is too slow, on your machine.

Slow on core i3?

If the callback overhead is so high (higher than CPU decoding the video), we pretty much loose the point of hardware decoding. I'm sure there's some other problem.

[Jean-Baptiste Kempf]

Sorry for the late response, couldn't log in (using phone's net connection instead)

First I'd a very bad time registering here. IT appears the admin has blocked all of the 4b ip4 addresses... which's actually ineffective.

We use several IP blacklists.

Don't you think blocking by IP is a bad idea? It a Windows user's account gets hacked, logs in and sends Spam, it's his/her problem, you should block the account and say it's his/her fault cause they're using Windows.

No, it is an excellent idea: it works.

Anyway, I've enabled hardware acceleration in the codec section but the cpu usage, while decoding h264 videos doubles on doing so, i.e. software decoding is more efficient.

Probably because of the callback is too slow, on your machine.

Slow on core i3?

If the callback overhead is so high (higher than CPU decoding the video), we pretty much loose the point of hardware decoding. I'm sure there's some other problem.[/quote]
You could try the VLC fork with direct rendering.