depaying MPEG2-TTS payload

[Abhinav Agrawal]

Thanks for your response.

> I don't think we have a depayloader for that format.
I also thought so.

>"any pointers for making rtpmp2tdepay work for this, maybe I should apply
a patch to remove those 4 additional bytes - will that be a right direction
? "

Would you or anyone in the community like to comment on that ?



> Hey, I'm not really familiar with it, but what you describe sounds like
> <https://en.wikipedia.org/wiki/.m2ts>, I don't think we have a depayloader
> for that format.
>
> On 9/7/20 4:35 AM, Abhinav Agrawal wrote:
> > Hi,?
> >
> > I need to depay MPEG2-TTS payload (timestamped TS) from an incoming RTP
> stream. I was trying rtpmp2tdepay element but it seems it does not consider
> the timestamp part of the packet and complains something like following -?
> >
> > >0:00:00.250589186 84 0x7fdb280044a0 WARN default
> gstrtpmp2tdepay.c:175:gst_rtp_mp2t_depay_process: We don't have an integral
> number of buffers (leftover: 24)
> > (Please note, the rtp packets having 6 TTS buffers, having 4 bytes of
> timestamp additionally for each TS packet, so 24 additional bytes makes
> sense to me).
> >
> > Following is the pipeline, I used -
> > gst-launch-1.0 -e filesrc location=file1.pcap ! pcapparse name=pcap !
> "application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)MP2T,payload=(int)103"
> ! rtpbin name=rtpbin ! rtpmp2tdepay ! tsparse ! tsdemux !
> video/x-h264,framerate=15/1,width=1280,height=720 ! h264parse !
> "video/x-h264" ! mp4mux ! filesink async=False location=out.mp4
> > I have a pcap file as source for now, unfortunately due to
> confidentiality agreement with customers, can't share the pcap file with
> the community.
> > Is there any in-built support in gstreamer to depay such a packet ? Or
> any pointers for making rtpmp2tdepay work for this, maybe I should apply a
> patch to remove those 4 additional bytes - will that be a right direction ?
> > For those not familiar with MPEG2-TTS, I could not find much on the
> internet , but just some japanese documents + wiki indicate that TTS is
> nothing but 4 bytes timestamp + TS. Some references (Sorry they are in
> Japanese - please translate with google :)) :
> > https://ja.wikipedia.org/wiki/MPEG-2%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0
> >
> > Any quick help would be highly appreciated.?
> >
> > Regards,
> > Abhinav
>
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