[Live-devel] Live555 : Queries

[Brian D'Souza]

Thanks for the inputs.

I needed your suggestions on steps I would need to follow to feed these NAL
units into the H264RTPSink. For starters

a) I am only going to be concerned with 1 NAL unit. As u mentioned ; i could
discard working on aggregation packets and just feed a single NAL unit into
packet. Would this involve just making a H264 framer class and read a NAL
unit and package it into a frame which i give as input to the H264RTPSink.
Please correct my understanding.

b) What would be drawbacks of not using aggregation packets?

c) Is there anything else I would need to implement?


Thanks,
Brian


On 8/16/07, Ross Finlayson <finlayson at live555.com> wrote:
>
>
>    - skim through RFC 3984 RTP Payload Format for H.264 Video<http://www.rfc-archive.org/getrfc.php?rfc=3984>
>
>
>
> You really shouldn't have to do this, because the library already
> implements this RTP payload format (using the "H264VideoRTPSink" class).
> All you need to do is feed NAL units to it.  However...
>
>
>
>
>    - Aggregation packets (STAP) are packets designed to hold together
>    many small NALs, to increase network efficiency
>
>
>
> Yes, we currently don't create these 'aggregation packets' (a special kind
> of NAL unit) ourselves, so if you want to use these, you'll need to create
> them yourself.  However, it's usually uncommon to have sequences of small
> NAL units
>
>
>
>
>    - fragmentation packets (FU) are packets designed to break huge NALs
>    (like IDR/key frames) into network size packets
>
>
>
> No, you don't have to implement these yourself.  Our "H264VideoRTPSink"
> class automatically does this for you.
>
> --
>
>
> Ross Finlayson
> Live Networks, Inc.
> http://www.live555.com/
>
> _______________________________________________
> live-devel mailing list
> live-devel at lists.live555.com
> http://lists.live555.com/mailman/listinfo/live-devel
>
>
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