There are cases, when 80% max isochronous bandwidth is too limiting.
For example I have two USB video capture cards which stream uncompressed
video, and to stream full NTSC + PAL videos we'd need
NTSC 640x480 YUV422 @30fps ~17.6 MB/s
PAL 720x576 YUV422 @25fps ~19.7 MB/s
isoc b
On 20:02 Wed 22 Jun , Kirill Smelkov wrote:
> There are cases, when 80% max isochronous bandwidth is too limiting.
>
> For example I have two USB video capture cards which stream uncompressed
> video, and to stream full NTSC + PAL videos we'd need
>
> NTSC 640x480 YUV422 @30fps ~17.6
On 10:30 Wed 22 Jun , matt mooney wrote:
> On 20:02 Wed 22 Jun , Kirill Smelkov wrote:
> > There are cases, when 80% max isochronous bandwidth is too limiting.
> >
> > For example I have two USB video capture cards which stream uncompressed
> > video, and to stream full NTSC + PAL videos w
On Wed, 22 Jun 2011, Kirill Smelkov wrote:
> There are cases, when 80% max isochronous bandwidth is too limiting.
>
> For example I have two USB video capture cards which stream uncompressed
> video, and to stream full NTSC + PAL videos we'd need
>
> NTSC 640x480 YUV422 @30fps ~17.6 MB/
On Wed, Jun 22, 2011 at 03:22:28PM -0400, Alan Stern wrote:
> On Wed, 22 Jun 2011, Kirill Smelkov wrote:
>
> > There are cases, when 80% max isochronous bandwidth is too limiting.
> >
> > For example I have two USB video capture cards which stream uncompressed
> > video, and to stream full NTSC +
On Wed, Jun 22, 2011 at 10:35:44AM -0700, matt mooney wrote:
> On 10:30 Wed 22 Jun , matt mooney wrote:
> > On 20:02 Wed 22 Jun , Kirill Smelkov wrote:
> > > There are cases, when 80% max isochronous bandwidth is too limiting.
> > >
> > > For example I have two USB video capture cards whic
On Thu, 23 Jun 2011, Kirill Smelkov wrote:
> > At 480 Mb/s, each microframe holds 7500 bytes (less if you count
> > bit-stuffing). 4% of that is 300 bytes, which is not enough for a
> > 512-byte bulk packet. I think you'd run into trouble trying to do any
> > serious bulk transfers on such a
On Thu, Jun 23, 2011 at 01:14:04PM -0400, Alan Stern wrote:
> On Thu, 23 Jun 2011, Kirill Smelkov wrote:
>
> > > At 480 Mb/s, each microframe holds 7500 bytes (less if you count
> > > bit-stuffing). 4% of that is 300 bytes, which is not enough for a
> > > 512-byte bulk packet. I think you'd ru