Problems with clockoverlay and MJPEG stream
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Problems with clockoverlay and MJPEG stream
![Noe Nieto [http://percepcionunitaria.org]]](/images/avatar100.png "Noe Nieto [http://percepcionunitaria.org]]"){kind=avatar} 
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Hi, I had posted this topic before but I am unsure if it reached the mailing list.
I have an app that displays MJPEG Streams from webcam cameras that looks like the following: gst-launch-0.10 gnomevfssrc location="http://ip/image?speed=25" ! decodebin ! ffmpegcolorspace ! videoscale ! ximagesink force-aspect-ratio="true" But when I add a clockoverlay element between the videoscale and ximagesink, the video gets frozen. Looks like it just displays the first frame. Can someone please, help me? What I am doing wrong. Noe Nieto. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Problems with clockoverlay and MJPEG stream
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Hi Noe ,
Your problem is because clockoverlay element works on YUV 4:2:0 data ( see caps by doing gst-inspect clockoverlay ) that means it expects YUV 4:2:0 data from previous element and sends YUV 4:2:0 data also to next element . But ximagesink works on RGB data thats why you can't connect these tow elements .
To solve this problem insert clockoverlay just after decodbin element .
On Thu, Oct 2, 2008 at 12:37 AM, Noe Nieto <[hidden email]> wrote:
-- Regards, Sudarshan Bisht ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Problems with clockoverlay and MJPEG stream
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Thanks Sudarshan
Now I've changed the pipeline to this: gst-launch-0.10 -v gnomevfssrc location=$CAMERA ! decodebin ! clockoverlay text="Camera 1" ! ffmpegcolorspace ! videoscale ! ximagesink force-aspect-ratio="true" But when I run the pipeline there is no video, it's only an still image with the clock time overlaid, but it is not moving. What is the problem? I have reviewed the output of gst-launch and I found a strange warning: Setting pipeline to PAUSED ... Pipeline is PREROLLING ... /pipeline0/decodebin0/typefind.src: caps = multipart/x-mixed-replace /pipeline0/decodebin0/multipartdemux0.sink: caps = multipart/x-mixed-replace /pipeline0/decodebin0/jpegdec0.sink: caps = image/jpeg /pipeline0/decodebin0/jpegdec0.src: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)480, framerate=(fraction)0/1 /pipeline0/clockoverlay0.src: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)480, framerate=(fraction)0/1 /pipeline0/clockoverlay0.video_sink: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)480, framerate=(fraction)0/1 /pipeline0/decodebin0.src0: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)480, framerate=(fraction)0/1 /pipeline0/decodebin0.src0.proxypad1: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)480, framerate=(fraction)0/1 (gst-launch-0.10:9349): GStreamer-CRITICAL **: gst_util_uint64_scale_int: assertion `denom > 0' failed /pipeline0/ffmpegcsp0.src: caps = video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)65280, green_mask=(int)16711680, blue_mask=(int)-16777216, width=(int)640, height=(int)480, framerate=(fraction)0/1, pixel-aspect-ratio=(fraction)1/1 /pipeline0/ffmpegcsp0.sink: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)480, framerate=(fraction)0/1 /pipeline0/videoscale0.src: caps = video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)65280, green_mask=(int)16711680, blue_mask=(int)-16777216, width=(int)640, height=(int)480, framerate=(fraction)0/1, pixel-aspect-ratio=(fraction)1/1 /pipeline0/videoscale0.sink: caps = video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)65280, green_mask=(int)16711680, blue_mask=(int)-16777216, width=(int)640, height=(int)480, framerate=(fraction)0/1, pixel-aspect-ratio=(fraction)1/1 /pipeline0/ximagesink0.sink: caps = video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)65280, green_mask=(int)16711680, blue_mask=(int)-16777216, width=(int)640, height=(int)480, framerate=(fraction)0/1, pixel-aspect-ratio=(fraction)1/1 Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstSystemClock Caught interrupt -- handling interrupt. Interrupt: Setting pipeline to PAUSED ... Execution ended after 8957877000 ns. Setting pipeline to PAUSED ... Setting pipeline to READY ... /pipeline0/ximagesink0.sink: caps = NULL /pipeline0/videoscale0.src: caps = NULL /pipeline0/videoscale0.sink: caps = NULL /pipeline0/ffmpegcsp0.src: caps = NULL /pipeline0/ffmpegcsp0.sink: caps = NULL /pipeline0/clockoverlay0.src: caps = NULL /pipeline0/clockoverlay0.video_sink: caps = NULL /pipeline0/decodebin0.src0: caps = NULL /pipeline0/decodebin0/jpegdec0.src: caps = NULL /pipeline0/decodebin0/jpegdec0.sink: caps = NULL /pipeline0/decodebin0/multipartdemux0.src_0: caps = NULL /pipeline0/decodebin0/multipartdemux0.sink: caps = NULL /pipeline0/decodebin0/typefind.src: caps = NULL Setting pipeline to NULL ... X connection to :0.0 broken (explicit kill or server shutdown). Is there a work around this, or a typical problem? Thank you. 2008/10/2 sudarshan bisht <[hidden email]>
------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Problems with clockoverlay and MJPEG stream
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Hi Noe ,
As you are using decodebin here as a decoder element so what is does is on the basis of input file it selects the decoder , here in your case it is selecting jpegdec(see red line in your log) , that means it will decode only one frame of data .
To fix this problem you can use ffdec_mjpeg element which is there in ffmpeg package.
On Sat, Oct 4, 2008 at 6:06 AM, Noe Nieto <[hidden email]> wrote:
-- Regards, Sudarshan Bisht ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Problems with clockoverlay and MJPEG stream
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Hi Sudarshan,
I did not had the time to hack on this for a while, but finally I changed the pipeline to this: gst-launch-0.10 -v gnomevfssrc location=$CAMERA ! mutipartdemux ! ffdec_mjpeg ! clockoverlay text="Camera 1" ! ffmpegcolorspace ! ximagesink The video still freezes. I still don't know why, even if the caps says that the video is at 25fps. If I try to close the window, gst-launch does not terminate the execution of the pipeline, I have to hit Ctrl-C to re-gain control over the console. Any idea? 2008/10/5 sudarshan bisht <[hidden email]>
------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Problems with clockoverlay and MJPEG stream
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This is strange,
If I use the test pipeline that comes in the documentation of the clockoverlay element. This works well, but mine's do not. gst-launch -v videotestsrc ! clockoverlay halign=right valign=bottom text="Edge City" shaded-background=true ! ffmpegcolorspace ! ximagesink gst-launch-0.10 -v gnomevfssrc location=$CAMERA ! mutipartdemux ! ffdec_mjpeg ! clockoverlay text="Camera 1" ! ffmpegcolorspace ! ximagesink Why does it work with videotestsrc and why it does it freezes with a MJPEG stream form network? 2008/10/23 Noe Nieto <[hidden email]> Hi Sudarshan, ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Problems with clockoverlay and MJPEG stream
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I tested this pipeline on Ubuntu Intrepid,
It comes with gstreamer 0.10.21 gst-launch-0.10 - gnomevfssrc do-timestamp=true location=$CAMERA ! mutipartdemux ! jpegdec ! timeoverlay ! ffmpegcolorspace ! ximagesink The time overlay works and video is not freezing. The modifier do-timestamp is the one that fixed the problem. Thanks to anyone who answered. 2008/10/24 Noe Nieto <[hidden email]> This is strange, ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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