From Forum Nokia Wiki

ID	KIS001471	Creation date	October 29, 2009
Platform	S60 3rd Edition, FP2	Devices	Nokia N96
Category	Multimedia	Subcategory	Video

Keywords (APIs, classes, methods, functions):

Overview

To record a video on the Nokia N96, additional settings are needed as the N96 hardware is different from other S60 devices.

Description

The N96 uses hardware codecs which require additional settings compared to other S60 devices. When the DevVideo Record example is run on the Nokia N96, the application fails with the KErrNotReady (-18) error while calling CMMFDevVideoRecord::WritePictureL(), or with KErrNotSupported (-5) if the camera has been set as the video source with CMMFDevVideoRecord::SetSourceCameraL().

How to reproduce

The DevVideo Record example can be used to reproduce the problem on the Nokia N96.

Solution

To ensure that MDF DevVideo encoders work on the Nokia N96, call the CMMFDevVideoRecord::SetRateControlOptions() function in MMMFDevVideoRecordObserver::MdvroInitializeComplete before calling CMMFDevVideoRecord::Start().

void CDevvideoExAppUi::MdvroInitializeComplete( TInt aError )
  {
  if ( aError != KErrNone )
    {
    // TODO: Handle errors
    return;
    }
 
  // Set rate control options
  TRateControlOptions rateCtrl;
  rateCtrl.iControl = EBrControlNone;
  rateCtrl.iPictureQuality = 0;
  rateCtrl.iBitrate = iBitRate;
  rateCtrl.iPictureRate = iFrameRate;
  rateCtrl.iQualityTemporalTradeoff = 0;
  rateCtrl.iLatencyQualityTradeoff = 0;
  iDvr->SetRateControlOptions( 0, rateCtrl );
 
  // Start encoding
  iDvr->Start();
 
  // Write first input picture
  iPicNum = 0;
  WritePic();
  }