reading and writing slice data about h264bitstream HOT 3 OPEN

Serhan,

The code in h264_slice_data.c needs work before it would be usable.
The following missing functions need to be implemented:

• bs_read_ce - for CAVLC
• NextMbAddress
• MbPartPredMode
• NumMbPart
• NumSubMbPart
• SubMbPredMode
• TotalCoeff
• TrailingOnes

They are just stubs right now. Most are relatively easy.

There would also need to be a data structure to store macroblocks - the macroblock_t struct describes what is in one macroblock, but there would have to be an array of them for a whole slice (with some way to index it - scan order, and convert scan order to row/column, plus utility functions to find neighbors of a given mb).

That's all I can think of at the moment. The code that is there now does cover a whole lot of what the standard does, it just needs the stubs to be filled in, and a bunch of testing.

from h264bitstream.

Alex,

Thanks for the list of functions and detailed explanation. I will definitely try to implement them sometime. Although (open-source) parsers do exist for HEVC, I couldn't find any parser other than yours for H.264. It is definitely interesting.

from h264bitstream.

Has anyone done any work on this? I'm trying to write some code that will parse (but not decode) an h264 stream, so that I can extract the motion vectors quickly for analysis.

from h264bitstream.