[FFmpeg-devel] Ticket 5012

[Carl Eugen Hoyos]

Am So., 19. Juli 2020 um 20:18 Uhr schrieb Gautam Ramakrishnan
<gautamramk at gmail.com>:
>
> On Sun, Jul 19, 2020 at 11:33 PM Thomas Volkert <silvo at gmx.net> wrote:
> >
> > Hi,
> >
> > On 19.07.2020 18:10, Gautam Ramakrishnan wrote:
> > > On Thu, Jul 16, 2020 at 11:45 PM Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
> > >> Am Do., 16. Juli 2020 um 19:42 Uhr schrieb Gautam Ramakrishnan
> > >> <gautamramk at gmail.com>:
> > >>
> > >>> How could I get access to some stream/file for testing this feature if
> > >>> I implement this?
> > >> GStreamer should allow you to test your implementation.
> > >>
> > >> Carl Eugen
> > > So to clarify things, basically the enc version would take a compressed
> > > codestream, and split it into RTP packets given in the RFC? Is there anything
> > > more than that? Is there any documentation page I can refer to? I was not able
> > > to find anything specific.
> >
> >
> > Do you mean the RFC itself?
> > -> https://tools.ietf.org/html/rfc5371
> >
> Yes
> >
> > Alternatively to GStreamer you can use Live555 to test your
> > implementation. I would start with the receiver and then continue with
> > the sender part.
> > Live555 source code for handling this payload:
> >
> > ->
> > https://github.com/ThomasVolkert/live555/blob/master/liveMedia/JPEG2000VideoRTPSink.cpp
> >
> > ->
> > https://github.com/ThomasVolkert/live555/blob/master/liveMedia/JPEG2000VideoRTPSource.cpp
> >
> >
> Thanks a lot for these, will be very helpful
>
> Additionally, what I understand is that the packetisation is of 3 types,
> main header, tile part header and codestream packets.
> However, if I understand it correctly, the rtp encoder provides an encoded
> j2k codestream. To get the codestream packets from this, the codestream will
> have to be decoded. Any suggestions on how to solve this? It does not make sense
> to decode a codestream for this purpose. Can the tile part packets be
> dumped from the encoder itself?

Did you already look into the rtp muxer / demuxer for jpeg or other formats?
I wonder if that would answer your questions.

Carl Eugen