Mpeg4 encoder framerate

Hi!

I'm using the HDVICP" accelerated mpeg4 encoder to compress high resolution (up to 1080p) video on the dm8168 media processor.  Is it possible somehow to set the framerate of the encoder?  I tried three different API without success.

By using the output port definition:

                PortDef.format.video.xFramerate = 10 << 16;  //10fps in Q16 format

With openmax API:

                OMX_IndexConfigVideoFramerate lFramerate;

                ...

                OMX_SetParameter(OMX_CONFIG_FRAMERATETYPE, &lFramerate);  //Will lead to unsupported index error

By using mpeg4 codec dynamic params:

                XDAS_Int32 lFramerate = (pParams->aOutFrameRate * 1000) >> 16;

                lDynParams.videoDynamicParams.mpeg4EncDynamicParams.videnc2DynamicParams.targetFrameRate = lFramerate;

                lDynParams.videoDynamicParams.mpeg4EncDynamicParams.videnc2DynamicParams.refFrameRate = lFramerate;

                OMX_SetParameter (lHandle, OMX_TI_IndexParamVideoDynamicParams, &lDynParams);  //API call works but fps remains 30 fps.

All these three methods either fail or leave the framerate at 30 whatever the value I try to set.  Also, Feeding the encoder with a lower fps stream will always lead to a 30 fps mpeg4 stream.

Is it possible somehow to set the encoder framerate?

Thanks

Bruno Marchand