gstreamer.md

Notes

• Tested with Ubuntu 14.04.5

Hints

• Commercial
  • https://gstreamer.freedesktop.org/data/events/gstreamer-conference/2015/Luis%20de%20Bethencourt%20-%20How%20to%20Contribute%20to%20GStreamer.pdf
• fdsink, fdsrc
  • Is it possible to use it: http://developers-club.com/posts/204014/
  • Example of usage: https://www.raspberrypi.org/forums/viewtopic.php?t=49278&p=664616
• RTSP
  • https://gstreamer.freedesktop.org/data/events/gstreamer-conference/2013/GStreamer%20Conference%202013%20-%20Wim%20Taymans%20-%20Latest%20GStreamer%20RTSP%20Server%20features.pdf
  • https://gstreamer.freedesktop.org/modules/gst-rtsp-server.html
  • http://stackoverflow.com/questions/13744560/using-gstreamer-to-serve-rtsp-stream-working-example-sought
  • https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-rtspsrc.html
  • https://gstreamer.freedesktop.org/documentation/rtp.html
• Streaming: http://www.polytech2go.fr/topinternet/sp_inetmedia/Lect.03.Gstreamer.multimedia.and.internet.pdf
• Known misstakes
  • in ... ! videoconvert ! video/x-raw width=1920, height=1080, format=RGB ,bpp=24 ! ... there is now , between video/x-raw and the afterwards comma-seperated list
  • Commonly, the sink of a plugin tells the source of the other plugin what it expects. But if not you can tell the sink with so called caps (capabilities) the target format... ! videoconvert ! video/x-raw width=1920, height=1080, format=RGB ,bpp=24 ! .... These caps are just another element in the pipeline, but are no plugin.
  • The sink and source caps can be investigated, if you use the -v switch with the tools, ot with GST_DEBUG=2
• Building test applications: https://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/chapter-building-testapp.html

Known issues

• Using idintity plugin to tap images from a gstreamer pipeling into program: http://gstreamer-devel.966125.n4.nabble.com/Using-idintity-plugin-to-tap-images-from-a-gstreamer-pipeling-into-program-td4679750.html , http://gstreamer-devel.966125.n4.nabble.com/Using-identity-causes-memory-leak-Ported-application-from-gstreamer-0-10-to-gstreamer-1-0-td4679488.html
• Video-Acceleration (X Error of failed request: BadRequest' when using nvidia driver with video acceleration (VA)): http://askubuntu.com/questions/830183/x-error-of-failed-request-badrequest-when-using-nvidia-driver-with-video-acce/831111#831111

Debugging

• Set debug output for current executed application (http://docs.gstreamer.com/display/GstSDK/gst-launch):
• export GST_DEBUG=2 : Like -vin the console
• export GST_DEBUG=5 2>&1 | grep caps: Get the capabilities of the pipeline
• export GST_DEBUG=5 : Ultra verbose

testsource

gstreamer-0.10

• gst-launch-0.10 videotestsrc ! video/x-raw-rgb,bpp=24,width=1000,height=1000 ! autoconvert ! ximagesink
• gst-launch-0.10 videotestsrc ! autoconvert ! ximagesink
• gst-launch-0.10 videotestsrc ! ximagesink

gstreamer-1.0

• gst-launch-1.0 videotestsrc ! video/x-raw, format="I420" ,width=640,height=480,framerate=30/1 ! identity name=artoolkit sync=true ! autovideosink
• If autovideosink does not work (bacause of VA API stuff), one can use xvimagesink

Video Playback

Using H.264 testsamples from http://jell.yfish.us/: http://jell.yfish.us/media/jellyfish-3-mbps-hd-h264.mkv as video.mkv

gstreamer-0.10

• gst-launch-0.10 -v playbin uri=file:////path/video.mkv
• gst-launch filesrc location=video.mkv ! decodebin2 name=dec ! ffmpegcolorspace ! autovideosink
• don't know why this does not work: ./simpleTest "playbin uri=file:////opt/repositories/artoolkit5/bin/video.mkv ! video/x-raw-rgb,bpp=24 ! fakesink"
• Hints
  • http://stackoverflow.com/questions/1576750/how-to-display-avi-video-with-gstreamer
  • Using Ubuntu14.04, first the missing ffmpeg decode/encoder needs to be installed, because ffmpeg was replaced by libav (https://askubuntu.com/questions/575869/how-do-i-install-gstreamer0-10-ffmpeg-on-ubuntu-14-10/575888)
    • sudo add-apt-repository ppa:mc3man/gstffmpeg-keep
    • sudo apt-get update
    • sudo apt-get install gstreamer0.10-ffmpeg

gstreamer-1.0

• gst-launch-1.0 -v playbin uri=file:///path/to/somefile.mp4
• gst-launch-1.0 -v playbin uri=file:///path/video.mkv
• gst-launch-1.0 -v filesrc location=/path/video.mkv ! matroskademux ! avdec_h264 ! autovideosink
• gst-launch-1.0 -v filesrc location=/path/video.mkv ! matroskademux ! avdec_h264 ! videoconvert ! autovideosink
• Hints
  • GSTREAMER 1.0 Playback a file: https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-plugins/html/gst-plugins-base-plugins-playbin.html
  • matroska: https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-matroskademux.html
  • RAW H264: http://blog.petehouston.com/2015/12/28/play-raw-h264-files-using-gstreamer/
  • RAW YUV: http://stackoverflow.com/questions/27419113/playing-a-raw-video-using-gst-launch

Camera Playback

gstreamer-0.10

• gst-launch v4l2src ! xvimagesink
• gst-launch v4l2src ! video/x-raw-yuv,width=320,height=240,framerate=30/1 ! xvimagesink
• gst-launch v4l2src ! video/x-raw-yuv,format=\(fourcc\)YUY2,width=320,height=240 ! xvimagesink

gstreamer-1.0

• gst-launch-1.0 v4l2src device="/dev/video0" ! video/x-raw,width=640,height=480 ! autovideosink
• Convert for no reason: gst-launch-1.0 v4l2src device="/dev/video0" ! videoconvert ! video/x-raw,format=RGB,width=640,height=480,framerate=30/1 ! videoconvert ! video/x-raw,format=I420,width=640,height=480,framerate=30/1 ! autovideosink

Shared Memory Playback

gstreamer-1.0

From: https://mazdermind.wordpress.com/2014/08/29/getting-shmsinkshmsrc-to-work-with-videomixer/

• Server: gst-launch-1.0 shmsrc socket-path=/tmp/foo ! video/x-raw,width=1000,height=1000,framerate=48/1,format=I420 ! autovideosink
• Client (Can be started multiple time)
  • For display: gst-launch-1.0 shmsrc socket-path=/tmp/foo ! video/x-raw, format=BGR ,width=640,height=480,framerate=30/1 ! videoconvert ! autovideosink
  • For record: gst-launch-1.0 shmsrc socket-path=/tmp/foo ! video/x-raw,width=640,height=480,framerate=25/1,format=I420 ! avimux ! filesink location=output.avi
• With mat2gstreamer
  • Server: ./mat2gstreamer
  • Client (My webcam has 640x480@30fps): gst-launch-1.0 shmsrc socket-path=/tmp/foo ! video/x-raw, format=BGR ,width=640,height=480,framerate=30/1 ! videoconvert ! autovideosink

UDP Playback

gstreamer-0.10

• UDP Theora
  • First start the client: gst-launch-0.10 -v udpsrc port=5000 ! application/x-gdp ! gdpdepay ! video/x-theora ! theoradec ! video/x-raw-yuv,format=\(fourcc\)I420,width=352,height=288 ! ffmpegcolorspace ! capsfilter caps=video/x-raw-rgb,bpp=32,endianness=4321,red_mask=65280,green_mask=16711680,blue_mask=-16777216 ! autoconvert ! ximagesink
  • Then start the server: gst-launch-0.10 -v videotestsrc ! video/x-raw-yuv,format=\(fourcc\)I420,width=352,height=288 ! theoraenc ! video/x-theora ! gdppay ! application/x-gdp ! udpsink host=127.0.0.1 port=5000
• RTP/UDP with testsource
  • Server: gst-launch -v videotestsrc ! video/x-raw-rgb, framerate=25/1, width=640, height=480 ! rtpvrawpay ! udpsink host=localhost port=5000
  • Client: gst-launch-0.10 -v udpsrc port=5000 caps=" application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)RGB, depth=(string)8, width=(string)640, height=(string)480, colorimetry=(string)SMPTE240M, payload=(int)96, ssrc=(uint)3496538899, clock-base=(uint)2820015588, seqnum-base=(uint)5902" ! rtpvrawdepay ! autoconvert ! ximagesink
• UDP with testsource
  • Server: gst-launch -v videotestsrc ! video/x-raw-rgb, framerate=25/1, width=100, height=100 ! udpsink host=localhost port=5000
  • Client: gst-launch-0.10 -v udpsrc port=5000 caps=" application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)BGR, depth=(string)8, width=(string)640, height=(string)480, framerate=30/1" ! rtpvrawdepay ! autoconvert ! ximagesink
  • Hint
    • in the UDP case (without RTP fragmentation) the packages can be only as big as one TCP frame

gstreamer-1.0

• RTP/UDP with testsource
  • Client: gst-launch-1.0 -v udpsrc port=5000 caps=" application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)RGB, depth=(string)8, width=(string)640, height=(string)480, colorimetry=(string)SMPTE240M, payload=(int)96, ssrc=(uint)3496538899, clock-base=(uint)2820015588, seqnum-base=(uint)5902" ! rtpvrawdepay ! videoconvert ! ximagesink
  • Server: gst-launch-1.0 -v videotestsrc ! video/x-raw, format=RGB, framerate=25/1, width=640, height=480 ! rtpvrawpay ! udpsink host=localhost port=5000
• RTP/UDP with mat2gstreamer
  • Client: gst-launch-1.0 -v udpsrc port=5000 caps=" application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)BGR, depth=(string)8, width=(string)640, height=(string)480, colorimetry=(string)SMPTE240M, payload=(int)96, ssrc=(uint)3496538899, clock-base=(uint)2820015588, seqnum-base=(uint)5902" ! rtpvrawdepay ! videoconvert ! ximagesink
  • Server: ./mat2gstreamer

TCP Playback

gstreamer-1.0

• RTP/TCP
  • Server: gst-launch-1.0 -v videotestsrc ! video/x-raw, format=RGB, framerate=30/1, width=1000, height=1000 ! gdppay ! tcpserversink port=3000
  • Client: gst-launch-1.0 -v tcpclientsrc port=3000 ! gdpdepay ! videoconvert ! ximagesink

ARtoolkit

NOTE: The identity plugin just pipes the source to the sink as it is. But it has the feature, the any program (here it is ARToolkit) which calls this gstreamer pipeline, can grab the data via the given name

testsource

gstreamer-0.10

• ./simpleTest "videotestsrc ! video/x-raw-rgb,bpp=24,width=1000,height=1000 ! identity name=artoolkit sync=true ! fakesink"

gstreamer-1.0

• ./simpleTest "videotestsrc ! video/x-raw, format=RGB,width=640,height=480,framerate=30/1 ! identity name=artoolkit sync=true ! fakesink"

Video

gstreamer-0.10

• h.264/MKV: ./simpleTest "filesrc location=video.mkv ! decodebin2 ! ffmpegcolorspace ! video/x-raw-rgb,bpp=24 ! identity name=artoolkit sync=true ! fakesink"
• IYUV/AVI (Uncompressed I420):

gstreamer-1.0

• Does not work properly: ./simpleTest 'filesrc location=video.mkv ! matroskademux ! avdec_h264 ! identity name=artoolkit sync=true ! capabilities video/x-raw,width=1920,height=1080,format=RGB,bpp=24 ! fakesink'

Camera

gstreamer-0.10

• ./simpleTest -device=GStreamer "v4l2src ! ffmpegcolorspace ! video/x-raw-rgb,bpp=24 ! identity name=artoolkit sync=true ! fakesink"

gstreamer-1.0

• Does not work: ./simpleTest -device=GStreamer "v4l2src device="/dev/video0" ! videoconvert ! video/x-raw,format=RGB,width=640,height=480,framerate=30/1 ! identity name=artoolkit sync=true ! fakesink"

UDP

gstreamer-0.10

• testsource
  • Server: gst-launch -v videotestsrc ! video/x-raw-rgb, framerate=25/1, width=100, height=100 ! udpsink host=localhost port=5000
  • Client: ./simpleTest -device=GStreamer 'udpsrc port=5000 caps="video/x-raw-rgb, framerate=(fraction)25/1, width=(int)100, height=(int)100, bpp=(int)32, endianness=(int)4321, depth=(int)24, red_mask=(int)16711680, green_mask=(int)65280, blue_mask=(int)255" ! ffmpegcolorspace ! video/x-raw-rgb,bpp=24 ! identity name=artoolkit sync=true ! fakesink'
• Camera
  • Server: ./mat2gstreamer
  • Client: ./simpleTest -device=GStreamer 'udpsrc port=5000 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)BGR, depth=(string)8, width=(string)640, height=(string)480, framerate=30/1" ! rtpvrawdepay ! ffmpegcolorspace ! video/x-raw-rgb,bpp=24 ! identity name=artoolkit sync=true ! fakesink'

Non-WORKING SETUP WITH UDP STREAM from OpenCV Webcam:

• ./simpleTest -device=GStreamer 'udpsrc port=5000 caps="video/x-raw-rgb, framerate=(fraction)30/1, width=(int)640, height=(int)480, bpp=(int)24, endianness=(int)4321, depth=(int)24, red_mask=(int)16711680, green_mask=(int)65280, blue_mask=(int)255" ! ffmpegcolorspace ! video/x-raw-rgb,bpp=24 ! identity name=artoolkit sync=true ! fakesink'

gstreamer-1.0

• testsource
  • Server: gst-launch-1.0 -v videotestsrc ! video/x-raw, format=BGR, framerate=25/1, width=100, height=100 ! rtpvrawpay ! udpsink host=localhost port=5000
  • Client: ./simpleTest -device=GStreamer 'udpsrc port=5000 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)BGR, depth=(string)8, width=(string)100, height=(string)100, colorimetry=(string)SMPTE240M, payload=(int)96, ssrc=(uint)1744359127, timestamp-offset=(uint)1879147832, seqnum-offset=(uint)3344" ! rtpvrawdepay ! videoconvert video/x-raw, format=RGB ,bpp=24 ! identity name=artoolkit sync=true ! fakesink'

Shared Memory

gstreamer-1.0

• Webcam
  • Server: ./mat2gstreamer
  • Client (Should work, but has segmentation fault when reaching function arVideoCapStart()): ./localizationTwb2 --vconf 'shmsrc socket-path=/tmp/foo ! video/x-raw,width=640,height=480,framerate=30/1,format=RGB ! identity name=artoolkit sync=true ! fakesink' --matrixCodeType AR_MATRIX_CODE_3x3 --patternDetectionMode AR_MATRIX_CODE_DETECTION --cpara calibration/cameraTimoNotebook_para.dat
  • Client (Works, but only with critical errors: [GStreamer-CRITICAL **: gst_mini_object_unref: assertion 'mini_object->refcount > 0' faile]): /localizationTwb2 --vconf 'shmsrc socket-path=/tmp/foo ! video/x-raw,width=640,height=480,framerate=30/1,format=RGB ! videoconvert ! video/x-raw,format=I420 ! videoconvert ! video/x-raw,format=BGR ! identity name=artoolkit sync=true ! fakesink' --matrixCodeType AR_MATRIX_CODE_3x3 --patternDetectionMode AR_MATRIX_CODE_DETECTION --cpara calibration/cameraTimoNotebook_para.dat

TWB

gstreamer-1.0

• RTP/UDP: Show the TWB camera attached to the local PC
  • Server: ./localizationTwb with pipeline: appsrc ! rtpvrawpay mtu=65000 ! udpsink host=localhost port=5000 max-bitrate=10000000 sync=true
  • Client: gst-launch-1.0 -v udpsrc port=5000 caps=" application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)RGB, depth=(string)8, width=(string)1000, height=(string)1000, colorimetry=(string)SMPTE240M, payload=(int)96, ssrc=(uint)3496538899, clock-base=(uint)2820015588, seqnum-base=(uint)5902" ! rtpvrawdepay ! videoconvert ! ximagesink
• RTP/TCP
  • Server: ./localizationTwb with pipeline: appsrc! gdppay ! tcpserversink port=3000
  • Client : ./localizationTwb2 --vconf 'tcpclientsrc port=3000 ! gdpdepay ! videoconvert video/x-raw, format=RGB ,bpp=24 ! identity name=artoolkit sync=true ! fakesink' --matrixCodeType AR_MATRIX_CODE_3x3 --patternDetectionMode AR_MATRIX_CODE_DETECTION --cpara calibration/camera3twb_para.dat

RTSP

In contradiction to RTP, a RTSP server negotiates the connection between a RTP-server and a client on demand. Thus, the target address of the RTP stream does not to be known in advance. The gst-rtsp-server is not a gstreamer plugin, but a library which can be used to implement your own RTSP application. The following test case was applied on a Ubuntu 12.04.5 machine:

• Preliminars
  • Install gstreamer-1.0 with base/good/ugly/bad plugins
  • Install autoconf automake autopoint libtool
• Build gst-rtsp-server
  • git clone git://anongit.freedesktop.org/gstreamer/gst-rtsp-server && cd gst-rtsp-server
  • We use gstreamer 1.2: git checkout remotes/origin/1.2
  • Build: ./autogen.sh --noconfigure && GST_PLUGINS_GOOD_DIR=$(pkg-config --variable=pluginsdir gstreamer-plugins-bad-1.0) ./configure ./configure && make (For some reason, GST_PLUGINS_GOOD_DIR is not set by pkg-config, so we set it explicitly)
• Test run
  • Run test application: cd examples && ./test-launch "( videotestsrc ! x264enc ! rtph264pay name=pay0 pt=96 )"
  • One can now access the stream (e.g. using VLC) remotely by the address: rtsp://HOST_IP:8554/test

TWB

• Run RTSP application to stream TWB camera (unfunctional try): ./test-launch "( shmsrc socket-path=/tmp/cam1 is-live=true do-timestamp=true ! video/x-raw, format=BGR ,width=1000,height=1000,framerate=48/1, bpp=24 ! videoconvert format="I420" ! x264enc ! rtph264pay name=pay0 pt=96 )"

Play Images TBD

FOLDER=/media/filestorage/pjuenemann/floor/BMP/;idx=0;for FILE in ${FOLDER}*bmp; do ln -s ${FILE} $(printf '%010d.bmp\n' $idx);idx=$((idx+1)); done
FOLDER=/media/filestorage/pjuenemann/floor/PNG/;idx=0;for FILE in ${FOLDER}*png; do ln -s ${FILE} $(printf '%010d.png\n' $idx);idx=$((idx+1)); done
gst-launch multifilesrc location=%010d.bmp \ caps="image/bmp,framerate=30/1,pixel-aspect-ratio=1/1" ! ffmpegcolorspace ! video/x-raw-yuv,format=(fourcc)I420 ! imagesink
gst-launch multifilesrc location=%010d.bmp caps="image/bmp,framerate=30/1,pixel-aspect-ratio=1/1" ! ffmpegcolorspace ! video/x-raw-yuv,format=(fourcc)I420 ! imagesink
gst-launch multifilesrc location=%010d.bmp caps="image/bmp,framerate=30/1,pixel-aspect-ratio=1/1" ! ffmpegcolorspace ! video/x-raw-yuv,format=I420 ! imagesink
gst-launch-1.0 multifilesrc location=%010d.bmp caps="image/bmp,framerate=30/1,pixel-aspect-ratio=1/1" ! ffmpegcolorspace ! video/x-raw-yuv,format=I420 ! imagesink
gst-launch-1.0 multifilesrc location=%010d.bmp caps="image/bmp,framerate=30/1,pixel-aspect-ratio=1/1" ! video/x-raw-yuv,format=I420 ! imagesink
gst-launch-1.0 multifilesrc location=%010d.bmp caps="image/bmp,framerate=30/1,pixel-aspect-ratio=1/1" ! video/x-raw-yuv,format=I420 ! videosink
gst-launch-1.0 multifilesrc location=%010d.bmp caps="image/bmp,framerate=30/1,pixel-aspect-ratio=1/1" ! video/x-raw-yuv,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%010d.bmp ! caps="image/bmp,framerate=30/1,pixel-aspect-ratio=1/1" ! video/x-raw-yuv,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%010d.bmp ! image/bmp,framerate=30/1,pixel-aspect-ratio=1/1 ! video/x-raw-yuv,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%010d.bmp ! image/bmp,framerate=30/1,pixel-aspect-ratio=1/1 ! autoconvert ! video/x-raw-yuv,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%010d.bmp ! image/bmp,framerate=30/1,pixel-aspect-ratio=1/1 ! autoconvert ! video/x-raw,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%010d.bmp ! image/bmp,framerate=30/1,pixel-aspect-ratio=1/1 ! videoconvert ! video/x-raw,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%10d.bmp ! image/bmp,framerate=30/1,pixel-aspect-ratio=1/1 ! autoconvert ! video/x-raw,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%010d.bmp ! image/bmp,framerate=30/1,pixel-aspect-ratio=1/1 ! autoconvert ! video/x-raw,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%010d.bmp index=0 caps="image/bmp,framerate=\(fraction\)30/1,pixel-aspect-ratio=1/1" ! autoconvert ! video/x-raw,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%010d.bmp index=0 caps="image/bmp,framerate=\(fraction\)30/1,pixel-aspect-ratio=1/1" ! videoconvert ! video/x-raw,format=I420 ! autovideosink
gst-launch-1.0 multifilesrc location=%010d.bmp index=0 caps="image/bmp,framerate=\(fraction\)30/1,pixel-aspect-ratio=1/1" ! autoconvert ! video/x-raw,format=I420 ! videorate ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.bmp" index=0 ! autovideosink
gst-launch-1.0 multifilesrc location="%09d.bmp" index=0 ! autovideosink
gst-launch-1.0 multifilesrc location="img.%04d.png" index=0 caps="image/png,framerate=\(fraction\)12/1" !     pngdec ! videoconvert ! videorate ! theoraenc ! oggmux ! \
gst-launch-1.0 multifilesrc location="img.%010d.png" index=0 caps="image/png,framerate=\(fraction\)12/1" ! pngdec ! videoconvert ! videorate ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" index=0 caps="image/png,framerate=\(fraction\)12/1" ! pngdec ! videoconvert ! videorate ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" index=0 caps="image/png,framerate=\(fraction\)12/1" ! pngdec ! videoconvert ! videorate ! autosink
gst-launch-1.0 multifilesrc location="%010d.png" index=0 caps="image/png,framerate=\(fraction\)12/1" ! pngdec ! videoconvert  ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" index=0 caps="image/png,framerate=\(fraction\)12/1" ! pngdec ! videoconvert  ! ximagesink
gst-launch-1.0 multifilesrc location="%010d.png" index=0 caps="image/png,framerate=\(fraction\)12/1" ! pngdec ! videoconvert ! videorate  ! ximagesink
gst-launch-1.0 multifilesrc location="%010d.png" index=0 caps="image/png,framerate=\(fraction\)12/1" ! pngdec ! videoconvert ! videorate  ! ximagesink
gst-launch-1.0 multifilesrc location="%010d.png" index=1 caps="image/png,framerate=\(fraction\)12/1" ! pngdec ! videoconvert ! videorate  ! ximagesink
gst-launch-1.0 multifilesrc location="%010d.png" index=1 caps="image/png,framerate=\(fraction\)30/1" ! pngdec ! videoconvert ! videorate  ! ximagesink
gst-launch-1.0 multifilesrc location="%010d.png" index=1 caps="image/png,framerate=\(fraction\)30/1" ! pngdec ! videoconvert ! videorate ! theoraenc ! oggmux ! filesink location="images.ogg"
gst-launch-1.0 multifilesrc location="%010d.png" index=1 caps="image/png,framerate=\(fraction\)30/1" ! pngdec ! videoconvert ! videorate ! theoraenc ! oggmux ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" index=1 caps="image/png,framerate=\(fraction\)30/1" ! pngdec ! videoconvert ! videorate ! theoraenc ! oggmux ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" index=1 caps="image/png,framerate=\(fraction\)30/1" ! pngdec ! videoconvert ! videorate ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" index=1 caps="image/png,framerate=\(fraction\)30/1" ! pngdec ! videoconvert ! videorate ! avdec_png ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" index=1 caps="image/png,framerate=\(fraction\)30/1" !  avdec_png ! autovideosink
gst-launch multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw-rgb,framerate=30/1 ! ffmpegcolorspace ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw-rgb,framerate=30/1 ! videoconvert ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw-rgb,framerate=30/1 !  xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw-rgb,framerate=30/1 !  ffmpegcolorspace ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw-rgb,framerate=30/1 !  videoconvert  ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw,format=rgb,framerate=30/1 !  videoconvert  ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw,format=RGB,framerate=30/1 !  videoconvert  ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw,format=RGB,framerate=30/1 !  videoconvert  ! 
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw,format=RGB,framerate=30/1 !  videoconvert  ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw,format=I420,framerate=30/1 !  videoconvert  ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format=I420 ,framerate=30/1 !  videoconvert  ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format=RGB ,framerate=30/1 !  videoconvert  ! xvimagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format=BGR ,framerate=30/1 !  videoconvert  ! xvimagesink
gst-launch-0.10 videotestsrc ! ximagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format=RGB ,framerate=30/1 !  videoconvert  ! ximagesink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format=RGB ,framerate=30/1 !  videoconvert  ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format=I420 ,framerate=30/1 !  videoconvert  ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format="I420" ,framerate=30/1 !  videoconvert  ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format="BGR" ,framerate=30/1 !  videoconvert  ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format="RGB" ,framerate=30/1 !  videoconvert  ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! avdec_png ! videorate ! video/x-raw ,format="RGB" ,framerate=30/1 !  videoconvert  ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! avdec_png ! videorate ! video/x-raw ,format="YUV" ,framerate=30/1 !  videoconvert  ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! avdec_png ! videorate ! video/x-raw ,format="RGB" ,framerate=30/1 !  videoconvert  ! autovideosink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! avdec_png ! videorate ! video/x-raw ,format="RGB" ,framerate=30/1 !  videoconvert  ! fpsdisplaysink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! avdec_png ! videorate ! video/x-raw ,format="RGB" ,framerate=30/1 !  fpsdisplaysink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! pngdec ! videorate ! video/x-raw ,format="RGB" ,framerate=30/1 !  fpsdisplaysink
gst-launch-1.0 multifilesrc location="%010d.png" ! image/png,framerate=30/1 ! avdec_png ! videorate ! video/x-raw ,format="RGB" ,framerate=30/1 !  videoconvert  ! autovideosink
gst-launch-1.0 videotestsrc ! video/x-raw, format="I420" ,width=640,height=480,framerate=30/1 ! identity name=artoolkit sync=true ! autovideosink
gst-launch-1.0 videotestsrc ! video/x-raw, format="I420" ,width=640,height=480,framerate=30/1  ! autovideosink