Dynamic parameter change of MPEG4 for DM365

Seog-Hong Park

Dear all

I have confronted somewhat mysterious problem.

Using MPEG4 encoder of DM365, dynamic parameter inputHeight and inputWidth change make a problem at function call VIDENC1_control() with XDM_SETPARAMS.

I.e., the function call VIDENC1_control returns VIDENC1_EFAIL. Of course, before changing the parameter, captured height and width are changed.

But, at the same condition, dynamic parameter targetBitRate, intraFrameInterval, etc does not make any problem at function call IDENC1_control() with XDM_SETPARAMS.

I want to know whether the result is correct or wrong. If the result is wrong, what is the possible problem.

Regards

SH Park.

over 15 years ago

0 Tej Pandey over 15 years ago

Intellectual 340 points

Hi,

Can you please provide following information?

1. What is the value of Max width/height, original input width/height and new input width/height?

1. Are you using codec in Base parameter mode or extended mode? If in extended parameter mode, then what is the value of subWindow width/height?

Regards,

Tej

0 Seog-Hong Park over 15 years ago in reply to Tej Pandey

Prodigy 70 points

1. The values of Max width/height are 704 / 480,

the original values of input width/height are 704/480,

and the new values of input width/height are 352/240.

2. I'm using extended mode and the values of subWindowWidth/subWindowHeight are 704/480.

Thanks in advance.

SH Park

0 Tej Pandey over 15 years ago in reply to Seog-Hong Park

Intellectual 340 points

Hi,

I understand the problem now.

Codec is created with subWindow width/height of 704/480, and later input width/height is changed to 352/240, hence codec is failing.

The concept of subWindow width/height is that user want to encode smaller resolution (specified by subwindow H/W) compared to actual input (captured) frame (specified by input H/W). So subwindow H/W should always be <= input H/W.

Incase you want to encode input frame at the same resolution, set subWindow H/W as '0' while creating the algorithm. This should solve the issue.

Regards,

Tej

0 Seog-Hong Park over 15 years ago in reply to Tej Pandey

Prodigy 70 points

When the SubWindow Width/Height is changed to '0', the algorithm creation is failed.

Also, when I tested using the following condition, it also make a failure when calling VIDENC1_control with XDM_SET_PARAMS.

original width/height : 720/408

subWindow width/height : 352/240

new width/height : 352/240

Thanks in advance

0 Tej Pandey over 15 years ago in reply to Seog-Hong Park

Intellectual 340 points

Hi,

Then only solution to avoid this problem is, create MPEG4 ecoder in Base parameter mode.

Control call to set dynamic parameter can be in either base mode or extended mode.

Regards,

Tej

0 Tej Pandey over 15 years ago in reply to Tej Pandey

Intellectual 340 points

Hi,

Did the above suggestion resolved the issue?

Regards,

Tej

0 Seog-Hong Park over 15 years ago in reply to Tej Pandey

Prodigy 70 points

Hi,

No. The same result.

Regards

SH Park

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Dynamic parameter change of MPEG4 for DM365