How can identify the KeyFrame from a MPEG4 Encoded data ?
how can we identify the Keyframe from MPEG4 Encoded data ?...
within MPEG4 Encoded data, they will have the configuration information u know... Every vop_start_code(00 00 01 B6) indicates a new frame.
For the First Frame Set the KeyFrame flag. Count this vop_start_code to identify the key frame.
if the vop_start_code is 30, then FrameCount % number_of_vop_start_codes == 0 then it is a keyframe.
within MPEG4 Encoded data, they will have the configuration information u know... Every vop_start_code(00 00 01 B6) indicates a new frame.
For the First Frame Set the KeyFrame flag. Count this vop_start_code to identify the key frame.
if the vop_start_code is 30, then FrameCount % number_of_vop_start_codes == 0 then it is a keyframe.
Labels: Directshow, MPEG4
posted by Sundar at 5:08 AM
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