Need help for undersanding 3GP file format

[darshak]

Hi,

I was going through the 3gp file format specification (3GPP TS 26.244 V7.3.0). I am having some questions related to this specification. Any help for answer to these questions would be very useful.

- How the switching functionality can be used. The specification doesn't say how the switching between the track happens.
- How Aggregated RTP Payload can be used.
- Encryption Scheme used. The specification doesn't say anything about the Encryption Scheme used.
- How ID3v2 Meta can be used.
- How SMIL and DIMS can be used.
- I am not able to find 3gp files from the Internet that supports General, Basic, Streaming-Server and Progressive Download Profile for latest 3gp file format specification (7.3.0).

Thanks in Advance...

[Drachir]

Hi,

I was going through the 3gp file format specification (3GPP TS 26.244 V7.3.0). I am having some questions related to this specification. Any help for answer to these questions would be very useful.
I don't think, that there is already support for this version, by current cell phones.


- How the switching functionality can be used. The specification doesn't say how the switching between the track happens.
MP4Box from http://gpac.sf.net ,seems to have some TrackSelection (tsel box) support. Maybe you can get some help at GPAC or http://www.resonate-mp4.com/ .


- How SMIL and DIMS can be used.
I don't know, how well this is supported by current cell phones. For the time being the rich media client and rich media server from http://www.streamezzo.com with LASeR (ISO/IEC 14496-20) support, could be an alternative.