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

[lx]

Uri Lublin <uril at redhat.com> 于2021年1月31日周日 下午9:48写道：

> On 1/30/21 1:25 PM, lx wrote:
> > 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?
>
> Currently, SPICE does not do look at USB data.
>

Hi:

What do you mean spice just forward USB protocol data?

Thank you
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