[gstreamer-bugs] [Bug 580880] New: gstrtpjpegpay is not functioning properly; rtp jpeg payload is corrupted

[GStreamer (bugzilla.gnome.org) <bug...@bu...>]

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  GStreamer | gst-plugins-good | Ver: git
           Summary: gstrtpjpegpay is not functioning properly; rtp jpeg
                    payload is corrupted
           Product: GStreamer
           Version: git
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gst...@li...
        ReportedBy: mar...@gm...
         QAContact: gst...@li...
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Please describe the problem:
when using a MJPEG camera (http source), Axis 243SA mjpeg; I re-multicast it
with:

$ gst-launch souphttpsrc location="http://10.3.0.71/axis-cgi//mjpg/video.cgi"
typefind=true ! multipartdemux ! udpsink host=226.226.226.220 port=2277

This step is basically removing the http unicast and multicasting for easy
usage.

Inspecting the stream with 

$ gst-launch udpsrc multicast-group=226.226.226.220 port=2277 ! jpegdec !
autovideosink

shows a clean stream of video.

The next step is to send the stream (UDP) and package it in RTP:

$ gst-launch udpsrc multicast-group=226.226.226.220 port=2277 ! jpegdec !
jpegenc ! rtpjpegpay ! udpsink host=226.226.226.120 port=2277

the jpegdec followed by the jpegenc is mainly due to a missing jpegparse as
discussed on IRC.

Reading the re-encoded JPEG stream with

$ gst-launch udpsrc multicast-group=226.226.226.120 port=2277
caps="application/x-rtp,clock-rate=(int)90000" ! rtpjpegdepay ! jpegdec !
autovideosink

is fine again.

However, when re-sending the JPEG stream without re-encoding:
jpegbinrtp is a bin that uses a jpeg dec/enc trick to get the resolution needed
for rtpjpegpay

$ gst-launch udpsrc multicast-group=226.226.226.220 port=2277 ! rtpjpegpay
silent=false ! udpsink host=226.226.226.120 port=2277Setting pipeline to PAUSED
...
Setup Streaming.
No decoding.
Setup streaming.
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
Found caps "image/jpeg".
Unhandled stream type, ghosting pad.
Ghosting pad is not linked: <recv_video_00>.
Ghosting pad is a src: <recv_video_00>.
Ghosting pad is not linked: <recvp_video_00>.
Ghosting pad is a src: <recvp_video_00>.
New barcorecvp pad, name: <recvp_video_00>.
Setup streaming.
No decoding/save.
Setup streaming.
Found caps "image/jpeg".
JPEG Elementary Stream.
TS wrapping is not yet implemented for this type of stream.
The width/height caps are missing, reencoding.
Found caps "image/jpeg, width=(int)704, height=(int)576,
framerate=(fraction)0/1".
JPEG Elementary Stream.
TS wrapping is not yet implemented for this type of stream.
The width/height caps are present, ghosting.
Pad was detected with enc/dec loop.
Stream blocked.
Ghosting pad is not linked: <send_src_00>.
Ghosting pad is a src: <send_src_00>.
Ghosting pad is not linked: <sendp_src_00>.
Ghosting pad is a src: <sendp_src_00>.
New barcosendp pad, name: <sendp_src_00>.
<sendp_src_00> is a src pad, ghosting.
Ghosting pad is not linked: <mgs_src_00>.
Ghosting pad is a src: <mgs_src_00>.
Stream unblocked.
WARNING: from element /GstPipeline:pipeline0/GstUDPSink:udpsink0: Internal data
flow problem.
Additional debug info:
gstbasesink.c(2867): gst_base_sink_chain_unlocked ():
/GstPipeline:pipeline0/GstUDPSink:udpsink0:
Received buffer without a new-segment. Assuming timestamps start from 0.

And re-subscribing to the stream; as described before, the image is completely
scrambled.

Steps to reproduce:
cf. supra


Actual results:
corrupted image

Expected results:
good image

Does this happen every time?
yes

Other information:
should have taken the normal bugzilla form.


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