[gstreamer-bugs] [Bug 575759] New: framerate doubled in h264

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-ffmpeg | Ver: git
           Summary: framerate doubled in h264
           Product: GStreamer
           Version: git
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-ffmpeg
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: le.businessman at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: 2.21/2.22
   GNOME milestone: Unspecified


Please describe the problem:
When streaming h264 over rtp, the framerate on the output is doubled. For
example, if your video source has 30fps, it will come out at 60fps.

Steps to reproduce:
gst-launch -v v4l2src ! x264enc ! rtph264pay ! rtph264depay ! ffdec_h264 !
xvimagesink

Actual results:
Setting pipeline to PAUSED ...
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0.GstPad:src: caps = video/x-raw-yuv,
format=(fourcc)I420, width=(int)768, height=(int)480,
framerate=(fraction)30000/1001
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:src: caps = video/x-h264,
width=(int)768, height=(int)480, framerate=(fraction)30000/1001,
codec_data=(buffer)014d4033ffe10016674d403392540601ed808800001f480007530478c19501000468ee3c80
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:sink: caps = video/x-raw-yuv,
format=(fourcc)I420, width=(int)768, height=(int)480,
framerate=(fraction)30000/1001
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:src: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264, profile-level-id=(string)4d4033,
sprop-parameter-sets=(string)\"Z01AM5JUBgHtgIgAAB9IAAdTBHjBlQ\\=\\=\\,aO48gA\\=\\=\",
payload=(int)96, ssrc=(guint)30712840, clock-base=(guint)30267285,
seqnum-base=(guint)33183
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:sink: caps =
video/x-h264, width=(int)768, height=(int)480, framerate=(fraction)30000/1001,
codec_data=(buffer)014d4033ffe10016674d403392540601ed808800001f480007530478c19501000468ee3c80
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:src: caps =
video/x-h264
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:sink: caps =
application/x-rtp, media=(string)video, clock-rate=(int)90000,
encoding-name=(string)H264, profile-level-id=(string)4d4033,
sprop-parameter-sets=(string)\"Z01AM5JUBgHtgIgAAB9IAAdTBHjBlQ\\=\\=\\,aO48gA\\=\\=\",
payload=(int)96, ssrc=(guint)30712840, clock-base=(guint)30267285,
seqnum-base=(guint)33183
/GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:sink: caps = video/x-h264
/GstPipeline:pipeline0/ffdec_h264:ffdec_h2640.GstPad:src: caps =
video/x-raw-yuv, width=(int)768, height=(int)480,
framerate=(fraction)60000/1001, format=(fourcc)I420,
pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstXvImageSink:xvimagesink0.GstPad:sink: caps =
video/x-raw-yuv, width=(int)768, height=(int)480,
framerate=(fraction)60000/1001, format=(fourcc)I420,
pixel-aspect-ratio=(fraction)1/1


Expected results:
The framerate would be doubled.

Does this happen every time?
Yes.

Other information:


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