Encode application - maximum GOP achievable

Hello,

Based on H264 encoder datasheet the GOP size is user defined and max GOP size or IDRFrameInterval is limited to 0x7FFFFFFF.

Refer to H264 Encoder User Guide for more details.

ti-ezsdk_dm814x-evm_5_05_02_00/component-sources/omx_05_02_00_48/src/ti/omx/docs

H264_Encoder_HDVICP2_UserGuide.pdf

Best Regards,

Margarita

Hello Margarita,

I go through this user guide. But I didn't get max no of  P frame value i can set in encode example.

As I described is above post we are getting following error, when we set p frame values higher then 127. Why this error is occurring.

Error Prints:
========================================================================================================================
root@dm814x-evm:~/dm814x-evm/usr/share/ti/ti-omx#
root@dm814x-evm:~/dm814x-evm/usr/share/ti/ti-omx# ./encode_a8host_debug.xv5T -o out_1080p_sp_185frames.h264 -i out_1080p_sp_185frames.yuv -f 60 -b 60000000 -w 1920 -h 1080 -c h264 -a 1 -p 128 -m 0 -M 0 -r 0
b-frame: 1
p-frame: 128
no of reference frames: 0
output file: out_1080p_sp_185frames.h264
input file: out_1080p_sp_185frames.yuv
bit_rate: 60000000
frame_rate: 60
codec: h264
width: 1920
height: 1080
no of b-frame: 1
no of p-frame: 128
Block size used for Motion Estimation for P-Frames = 0
Block size used for Motion Estimation for B-Frames = 0
no of reference frame: 0
 Encode example
===============================
 OMX_Init completed
 UIAClient is ready to send a UIA configuration command
UIAClient received UIA_CONFIGURE_ACK
UIAClient is done sending requests
UIAClient is ready to send a UIA configuration command
UIAClient received UIA_CONFIGURE_ACK
UIAClient is done sending requests
 opening file
 encoder component is created
success OMX_IndexParamVideoAvc getparams
success OMX_IndexParamVideoAvc setparams
success OMX_TI_IndexParamVideoMEBlockSize getparams
success OMX_TI_IndexParamVideoMEBlockSize setparams
 encoder input port allocate buffer done
  encoder outport buffers allocated
 got event*** unrecoverable error: OMX_ErrorBadParameter (0x80001005)
Press a key to proceed

Hi Vaibhav,

Check the data-type of the variable you have used for setting no of P frames.

From you statement, It looks to me as if its "char" which at max can hold value - 127. If yes, try to change it to some higher data-type like "int" or "unsigned int".

-- Krunal

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Hi Krunal,

Thanks for solution. I fixed this issue with same solution.