Enumerating DirectShow MediaTypes on HTC Hermes/TyTN lists only 160x120@7.5Hz !

Hi all,

I just got a TyTN and was instantly very impressed with the camera's
quality. So i tried my DirectShow camera library which I know to run
fine on the HTC Wizard/Universal/Tornado devices, but I immediatelly
realized the following problem:

When i enumerate the camera modes on the TyTN, the only mode i get is
160x120, 7.5Hz, YUV12. While my lib can play that back without
problems, I'd rather acess those modes with higher resolution and
framerate.

Looking at the built-in camera tool and comparing the video quality
againt other devices I'd guess the preview runs at 320x240 at 7.5 Hz
(video quality of the preview is really great). I already checked that
this is the higher quality camera on the back side and not the low
quality camera on the front side.

Is HTC trying to block us from using the more advanced camera modes
via DirectShow or am i missing something here?

thanks for any hints,
Daniel

cputoaster
Fri Sep 08 08:35:43 CDT 2006

Yep, I got the same experience, but I don't even get the 7.5Hz, but
something like 0.3Hz (might be related to the fact that I am building a
capturegraph that outputs to the screen -> some rgb conversion happens
somewhere).

As you say, all other phones can at least give 176x144 on rgb565 with a
decent framerate.

Looks like the dshow available modes are inversely proportional to the
propriatory features of the device. Any comments from HTC or Microsoft
on that one?

Andres


Daniel wrote:
> Hi all,
>
> I just got a TyTN and was instantly very impressed with the camera's
> quality. So i tried my DirectShow camera library which I know to run
> fine on the HTC Wizard/Universal/Tornado devices, but I immediatelly
> realized the following problem:
>
> When i enumerate the camera modes on the TyTN, the only mode i get is
> 160x120, 7.5Hz, YUV12. While my lib can play that back without
> problems, I'd rather acess those modes with higher resolution and
> framerate.
>
> Looking at the built-in camera tool and comparing the video quality
> againt other devices I'd guess the preview runs at 320x240 at 7.5 Hz
> (video quality of the preview is really great). I already checked that
> this is the higher quality camera on the back side and not the low
> quality camera on the front side.
>
> Is HTC trying to block us from using the more advanced camera modes
> via DirectShow or am i missing something here?
>
> thanks for any hints,
> Daniel

Daniel
Wed Sep 13 09:29:57 CDT 2006

On Fri, 08 Sep 2006 15:35:43 +0200, cputoaster
<cputoaster@nospam.nospam> wrote:

>Looks like the dshow available modes are inversely proportional to the
>propriatory features of the device. Any comments from HTC or Microsoft
>on that one?

no reply so far from either HTC or MS.
i asked twice here but both times no reaction...

Daniel