dm365 jpeg encoder: captureWidth seting

Dear all,

  my software is dvsdk4.02, dmai_2_20_00_15.

  my input yuv is 1280x720 but I just want to encoder the left half part, so I setting :

  dynParams.inputWidth = 640;       /left half
   dynParams.inputHeight = 720;
   dynParams.captureWidth = 1280;  //line length

  Ienc1_create(hEngine, args->codecName, &params, &dynParams);

  Ienc1_create will fail and the encStatus.extendedError is 0x0000c00a, which means "Error in capture width parameter".

  How can I do this? Is this means I must use edma to copy it before encoder?

Best Regards,

 姜 维