[Spice-devel] Video stream low performance on raspberry pi while using h264

[Snir Sheriber]

Hi,

On 2/22/19 4:14 PM, 陈炤 wrote:
> Hi,
>
> I am testing video stream on raspberry pi. My spice-gtk version is 
> 0.34 and spice server is 0.14, video encode type is h264. On raspberry 
> pi I use omxh264dec as hardware accelerated decoder.


Can you shed more light on the server side configuration & encoding, 
according to previous discussion I am not sure
if you are using spice-streaming-agent or just spice-server?


>
> When I play video on VM, the video looks fine if the video is set to 
> default size, but if the video is set to fullscreen, the video looks 
> awful, the frame rate is less than 10. I try to change gstreamer sink 
> from 'appsink' to 'glimagesink', the video looks ok but a new window 
> is popped up to play video, which is bad.
>
> CPU usage of spicy and xorg are not high(about 50%).
>
> I suspect that appsink would copy data from GPU to CPU, so when the 
> data size is big, this operation will affect performance greatly. Is 
> there anyone who can give me any suggestion?


This is indeed what happens, in some cases moving to v0.36 can bypass 
some of this cpu usage.


Snir.

>
> Best Regards,
> Don
>
>
>
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