[Spice-devel] Is the data after USB camera redirection compressed?

[lx]

Frediano Ziglio <freddy77 at gmail.com> 于2021年1月29日周五 下午6:39写道：

> Il giorno gio 28 gen 2021 alle ore 01:45 lx <lxlenovostar at gmail.com> ha
> scritto:
> >
> >
> > Uri Lublin <uril at redhat.com> 于2021年1月27日周三 下午11:47写道：
> >>
> >> On 1/27/21 4:22 AM, lx wrote:
> >> > Hi all:
> >> >         If I redirect USB camera to virtual machine, I think we send
> >> > original URB to virtual machine by USB channel.
> >> > Is this understanding correct? If we want to improve the user
> experience,
> >> > we need to compress URB data?
> >>
> >> Hi,
> >>
> >> If you build with lz4 enabled (both client and server),
> >> then it should use lz4 to compress the data.
> >>
> >> There is no functionality to create
> >> a video stream out of raw data.
> >>
> >> Can the USB camera be configured to send a compress stream?
> >>
> >> Uri.
> >>
> >
> >   Hi:
> >    USB camera can support MJPG and YUV.   I think H264 is better than
> MJPG. So Can we
> > let spice support H264 ? Is this feasible?
> >
>
> This is independent from SPICE, if the camera send compressed data
> already SPICE will just
> forward compressed data in whatever format is in USB.
> If the camera supports MJPEG and YUV choose MJPEG, YUV is not
> compressed (just a different color
> space than RGB, often taking less bits but still not compressed).
>
> Frediano
>

If the camera chooses YUV, can we encode it to H264 in SPICE? Is this
feasible?

Thank you.
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