lovehis
16th February 2007, 06:29
I'm write a RMFF demuxer for mobile phone from scratch. I got some question about realvideo(or RMFF).
1) How to extract RealVideo's codec DSI (Decoder Specific Info) form MDPR chunk?
I know in MDPR chunk, there is type_specific_data field. But in the type_specific_data, there are more data than just DSI... How do we know which data is DSI (or ASC: Audio Specific Config)?
2) Parsing DATA chunk.
I think in RMFF's DATA chunk, there are sub-paylads or multiple-payloads like an ASF's MDAT chunk. But I can't find any specification about it, just I can find some source codes (like ffmpeg...) which are coded like encrypted text...
Is there anyone who know "Where I can find spec. or some clues about it"?
Thanks in advance.
1) How to extract RealVideo's codec DSI (Decoder Specific Info) form MDPR chunk?
I know in MDPR chunk, there is type_specific_data field. But in the type_specific_data, there are more data than just DSI... How do we know which data is DSI (or ASC: Audio Specific Config)?
2) Parsing DATA chunk.
I think in RMFF's DATA chunk, there are sub-paylads or multiple-payloads like an ASF's MDAT chunk. But I can't find any specification about it, just I can find some source codes (like ffmpeg...) which are coded like encrypted text...
Is there anyone who know "Where I can find spec. or some clues about it"?
Thanks in advance.