Problem with recording video and displaying at the same time

[Dimitrios Katsaros]

You are missing an exclamation point here: "tee name=t ! queue <!>
matroskamux" in your post. I will assume that that was a typo when you were
writing the e-mail.

Check the sink caps of omxh264dec and matroskamux. I don't have the omx
plugins available on my setup so I can't verify this, but it is possible
that the two elements expect different variants of h264. If this is the
case you should use 2 h264parses after the tee to provide the correct
format to both. Also, avoid using sync=0, this can cause reduced quality
for your video output. You should increase the latency on the pipeline or,
if youa re using gst-launch, you can try increasing the "ts-offset"
parameter in ximagesink

Dimitrios


On Wed, Feb 8, 2017 at 9:47 AM, Zyx <sebastian888 at outlook.com> wrote:

> Hi,
>
> I am receiving a video from udp port. I wanted to save it in a file and at
> the same time display it on the screen. When I do this separately it works
> just fine:
>
> gst-launch-1.0 -e -v udpsrc port=5000 ! application/x-rtp, payload=96 !
> rtpjitterbuffer ! rtph264depay ! h264parse ! omxh264dec ! ximagesink
> sync=false
>
> and for recording:
> gst-launch-1.0 -e -v udpsrc port=5000 ! application/x-rtp, payload=96 !
> rtpjitterbuffer ! rtph264depay ! h264parse ! matroskamux ! filesink
> sync=false location='/home/pi/recorded/test.mkv'
>
> But when I do this using one command like this:
> gst-launch-1.0 -e -v udpsrc port=5000 ! application/x-rtp, payload=96 !
> rtpjitterbuffer ! rtph264depay ! h264parse ! tee name=t ! queue matroskamux
> ! filesink sync=false location='/home/pi/recorded/test.mkv' t. ! queue !
> omxh264dec ! ximagesink sync=false
>
> I've got internal data flow error:
>
> Setting pipeline to PAUSED ...
> Pipeline is live and does not need PREROLL ...
> Setting pipeline to PLAYING ...
> New clock: GstSystemClock
> /GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps =
> "application/x-rtp\,\ payload\=\(int\)96\,\ media\=\(string\)video\,\
> clock-rate\=\(int\)90000\,\ encoding-name\=\(string\)H264"
> /GstPipeline:pipeline0/GstRtpJitterBuffer:rtpjitterbuffer0.GstPad:src:
> caps
> = "application/x-rtp\,\ payload\=\(int\)96\,\ media\=\(string\)video\,\
> clock-rate\=\(int\)90000\,\ encoding-name\=\(string\)H264"
> /GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:src: caps =
> "video/x-h264\,\ stream-format\=\(string\)byte-stream\,\
> alignment\=\(string\)nal"
> /GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:sink: caps =
> "application/x-rtp\,\ payload\=\(int\)96\,\ media\=\(string\)video\,\
> clock-rate\=\(int\)90000\,\ encoding-name\=\(string\)H264"
> /GstPipeline:pipeline0/GstRtpJitterBuffer:rtpjitterbuffer0.GstPad:sink:
> caps
> = "application/x-rtp\,\ payload\=\(int\)96\,\ media\=\(string\)video\,\
> clock-rate\=\(int\)90000\,\ encoding-name\=\(string\)H264"
> ERROR: from element /GstPipeline:pipeline0/GstUDPSrc:udpsrc0: Internal
> data
> flow error.
> Additional debug info:
> gstbasesrc.c(2933): gst_base_src_loop ():
> /GstPipeline:pipeline0/GstUDPSrc:udpsrc0:
> streaming task paused, reason not-negotiated (-4)
> EOS on shutdown enabled -- waiting for EOS after Error
> Waiting for EOS...
>
> Does anyone have an idea what is wrong?
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.
> n4.nabble.com/Problem-with-recording-video-and-
> displaying-at-the-same-time-tp4681757.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
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