Fwd: Question from a chinese programmer

[Kop Yiddish <yiddishkop@xxxxxxxxx>]

---------- 转发的邮件 ----------
发件人："Kop Yiddish" <yiddishkop@xxxxxxxxx>
日期：2016年8月25日 21:20
主题：Question from a chinese programmer
收件人： <pgrunt@xxxxxxxxxx>
抄送：

hi, sir, 

How are you?

I'm a programmer from china ,i have some questions about your patchwork in SPICE project. May I make bold to disturb you for some minitues ?

I recently encounter a problme, we use SPICE for remote access , but when playing high-quality video ,  it droped frames seriously with high Memory usage and CPU suage.

I suppose SIPCE will control the rate of video stream by the bandwidth, but it appears that SPICE protocal doesn't work.

I read the souce code related, I find some clues about it.

enum {

    SPICE_DISPLAY_CAP_SIZED_STREAM,

    SPICE_DISPLAY_CAP_MONITORS_CONFIG,

    SPICE_DISPLAY_CAP_COMPOSITE,

    SPICE_DISPLAY_CAP_A8_SURFACE,

    SPICE_DISPLAY_CAP_STREAM_REPORT,

};

dcc->use_mjpeg_encoder_rate_control =

        red_channel_client_test_remote_cap(&dcc->common.base, SPICE_DISPLAY_CAP_STREAM_REPORT);

 

I have some question below:

1. I find encoder will check the SPICE_DISPLAY_CAP_STREAM_REPORT, and decide whether functioned the "rate control of the the transfermation", is my understanding right?  
   
2. I find your pathwork to SPICE about SPICE_DISPLAY_CAP_LZ4_COMPRESSION, did the original project has some bugs in controling the rate of the transformation from SPICE-server to client, i mean it can not control the quality of video by the bandwidth
3. Can you explain the word -- "channel capability",which i encountered many times, but i can't specify the TRUE meaning of it.

THANK YOU VERY MUCH , please forgive my poor english, and best wishes with you and your family.

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