Where to intercept NAL packets?

[indio]

Hi all,
I developed an H264 - RTSP video server which sends encryped NAL packets and send other custom payload using Unspecfied NAL unit type.
Client side i was trying to use libVLC in order to connect to to the server, decrypt NALs, get custom NAL packet and play the Video.

Where is the best place to process incoming ordered NAL packets?

• Writing a plugin? I found this with seems good https://github.com/ealloradai/OpenH264-VLC-Plugin
  Writing a complete decoder? I could patch the openh264 decoder (https://github.com/cisco/openh264) but i don't have to deal with h264 format... i only have to read it and let it pass.
  Can i use some sort of callback? like here http://stackoverflow.com/questions/2309 ... encv-mat-c

Any help would be really apreciated
Indio

[Rémi Denis-Courmont]

At this point, you would have to write your own RTSP plugin altogether and replace the existing one(s). Due to lack of time/resources, there exists no proper abstraction for RTP depayloading in VLC.

[indio]

Thanks for the reply,
I didn't expect to code a complete Demuxer!
Is there no way sto stay in a later state in the chain to decrypt the NALs payload? Or It would be easier if i drop the requirement to have the ordered packets?

[indio]

Hi again,
Is it correct that the h264 decoder stay on top of RTP-RTSP? If so in the h264 decode i could get what i need to deal with NALs packet.

As an example, in the OpenH264 project the ParsNalHeader function here https://github.com/cisco/openh264/blob/ ... parser.cpp
suggest me could be correct. Am i missing something?
I