I think you misunderstood. The device isn't a new type, it's simply a USB frame
grabber of type CLSID_VideoInputDeviceCategory. What it *does* have is multiple
input channels (4 separate video inputs: Composite, Component, S-Video and SDI).
>From looking at the source code, it looks like you had anticipated this:
Sub Add(dev As DirectShowMonikerMBS, type as String)
// Microsoft calls it Displayname, but it looks more like some UniqueID
dim DisplayName as string = dev.DisplayName
// check subobjects
dim e as DirectShowEnumMonikerMBS = dev.EnumMonikers(true)
if e<>Nil then // there could be components of a composite moniker.
List.AddFolder DisplayName
else
List.AddRow DisplayName
end if
</snip>
...where "e" would return with some list of input channels that could then be
enumerated through using ".NextObject" (although you never actually wrote that
code).
>From what I see, dev.EnumMonikers(true) *always* returns Nil, so there is no
>way for me to list (or access) the individual inputs on this device.
>Essentially the frame grabber code defaults to the first input (composite
>video) with no obvious way to get at the others...
Am I missing something?
-bill k
On Sep 6, 2012, at 1:39 PM, Christian Schmitz <[email protected]>
wrote:
>
> Am 06.09.2012 um 19:53 schrieb William Koperwhats <[email protected]>:
>
>> Christian,
>>
>> In your DirectShow List Devices example code you built in functionality (in
>> the "Add" method) for composite input devices. I've tested this on a
>> Honestech 28285 based USB frame grabber with 4 different inputs (Composite,
>> S-Video, Component and SDI) and "e" (line 5) always returns Nil. I'm
>> wondering if this is a bug or am I missing something?
>
>
> I simply added all types there. No idea what Microsoft actually uses today.
>
> Greetings
> Christian
>
> --
> Check out the Omega Bundle:
>
> http://www.omegabundle.com/
>
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