Uri Lublin <uril@xxxxxxxxxx> 于2021年2月2日周二 下午10:32写道：
On 2/2/21 2:50 PM, lx wrote:
>
>
> Uri Lublin <uril@xxxxxxxxxx <mailto:uril@xxxxxxxxxx>> 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@xxxxxxxxx <mailto:freddy77@xxxxxxxxx>>
> 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@xxxxxxxxx <mailto:lxlenovostar@xxxxxxxxx>> ha
> >> scritto:
> >>>
> >>>
> >>> Uri Lublin <uril@xxxxxxxxxx <mailto:uril@xxxxxxxxxx>> 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?
SPICE does look at USB headers, configurations, etc.
I meant that SPICE does not look at data that is
being transferred. So for example, it does
not know if the data coming from the camera is YUV,
RGB, MJPEG or other.
To answer your question above more clearly:
Currently it's not possible to H264-encode the
YUV data coming from the camera.
It is feasible to add code that does it.
If possible, it's best if the camera sends an encoded video stream.
Uri.
Hi all:
I know ICA/RDP is better than spice, when they redirect the USB camera devices. This is beacuse
ICA/RDP encode video stream, so the effect is so good? Or how can we optimize spice to achieve their results?
Thank you
btw: I know ICA/RDP support few devices.
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