Archived:Additional settings needed to run DevVideoRecord on N96 (Known Issue)

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Archived: This article is archived because it is not considered relevant for third-party developers creating commercial solutions today. If you think this article is still relevant, let us know by adding the template {{ReviewForRemovalFromArchive|user=~~~~|write your reason here}}.

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

Article Metadata

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Tested with

Devices(s): Nokia N96

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Compatibility

Platform(s): S60 3rd Edition FP2

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Article

Created: User:Kbwiki (29 Oct 2009)

Last edited: hamishwillee (15 Jun 2012)

Description

The N96 uses hardware codecs which require additional settings compared to other S60 devices. When the Archived:MDFDevVideo Record Symbian API 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 Archived:MDFDevVideo Record Symbian API 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();
  }