how to change H264 elementary stream frame rate

Hongfeng Wang

Platform: DM8148, RDK2.8

camera input is 30fps, encoded at 30fps, but when the recorded h264 is played back, the player always thinks it's 60fps.

I tried changing all the 60fps to 30fps in usecase and ipnc_main.c, but it's still the same.

Where should I change this?

Thanks!

over 12 years ago

0 Badri Narayanan over 12 years ago

TI__Guru 59700 points

Are you doing playback with a PC player or are you playing back the stream using mcfw ? If you are playing back with PC player are you feeding only h264 elementary stream or is it in AVI or some other container format.

0 Hongfeng Wang over 12 years ago in reply to Badri Narayanan

Genius 3925 points

Thanks for your reply.

I was playing back the video on PC. the video clip is elementary stream.

0 Badri Narayanan over 12 years ago in reply to Hongfeng Wang

TI__Guru 59700 points

AS you are aware elementary stream does not have any timestamps. The PC player probably looks for SEI/VUI info in the h264 stream to identify frame rate and if it doesnt find any it may default to playing 1080P at 60 fps.To introduce SEI/VUI msg into the elementary stream you will have to modify encLink_h264.c .SEI and VUI are optional and are not inserted by default.

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how to change H264 elementary stream frame rate