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i've do that but still "ERROR PLAYING " IS in output message

Some possible reasons for playback failure:

- Running both Arena and OptiShow at the same time. This is not supported.

- DirectShow filter conflict. It's often the case DirectShow filters installed by other applications get used in graph building, and these interfere with corrcct playback, especially MJPEG decoders, which are not standardized. It's important your graph is using the NaturalPoint MJPEG decoder filter. You can use the DirectShow GraphEdit application that comes with the MS Windows SDK, or step thru the OptiShow source code (provided with our DirectShow SDK) to determine this.

- Unsupported renderers. On early versions of Windows XP, the default VideoRenderer was used, which is not supported. We require XP SP2, and recommend Windows 7.

Some additional questions:

Does Optishow work correctly when run by itself with only one camera attached?

Can you send us the DirectShow graph file (grf) that is built?

Have you changed the source code or rebuilt the OptiShow application?

Are you able to view the OptiTrack camera in GraphEdit, or some other DirectShow application?

thanks,

Morgan

SO,
SAME WITH ONLY ONE CAM,
what means "DirectShow graph file (grf)" because it builts no file? or where is it?
i've no other direct show application
thanks
yann

should i download a directshow app?and wich one?

i've maded good capture with optitrack cam in a capture app(called Kapture) it works good???

GraphEdit is a Microsoft provided Windows application for building DirectShow filter graphs using DirectShow compliant filters.

It is part of the Micrsoft Windwos SDK:

http://www.microsoft.com/downloads/en/d ... 3DC8C33A20

grf files are GraphEdit filter graph files, which can be saved from Graphedit. These can be used to diagnose filter graph issues.

hope this helps,

Morgan