<div dir="auto"><div> <div class="gmail_extra"> <div class="gmail_quote">Le 9 mars 2017 1:50 PM, "Vivia Nikolaidou" <<a href="mailto:n.vivia@gmail.com">n.vivia@gmail.com</a>> a écrit : <blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, You can try without the jpegparse element, it's likely changing the timestamps. </blockquote></div></div></div><div dir="auto"> </div><div dir="auto">That's a good idea, you should try.</div><div dir="auto"> </div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Also, why do you have that videorate element there? If there's no capsfilter around it and there are no arguments to it, it's probably not doing much. </blockquote></div></div></div><div dir="auto"> </div><div dir="auto">Videorate is useful since cameras will produce lower rate then expected in low light. Having later dynamic rate is just a pain for post processing.</div><div dir="auto"> </div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Best regards, Vivia <div class="elided-text"> On 9 March 2017 at 18:48, Damien Picard <<a href="mailto:picard.damien@gmail.com">picard.damien@gmail.com</a>> wrote: > Hi, > > I'm currenlty discovering GStreamer and I am looking for a way to capture > and encode my UVC webcam to H264 stream in a MP4 container. > > I am able to achieve it using this command : > > gst-launch-1.0 -e v4l2src device=/dev/video0 ! > 'image/jpeg,width=1920,height=1080' ! jpegparse ! jpegdec ! videoconvert ! > videorate ! x264enc ! mp4mux ! filesink location=videotestsrc.mp4 > > It does the job but the resulting videotestsrc.mp4 does not seem to have the > right framerate because the video is "accelerated". > I think it could be caused by two things : > - The framerate in the resulting video is actually not the good one, but > I'm not able to diagnose and fix it ; do you have some tricks to achieve > this ? > - The capture step does not capture the whole 30 frames per seconds (for a > reason that I don't understand) and, in the resulting video, only the > captured frames are displayed, at 30 fps ; involving that the video seems to > be accelerated. > > Some tests I do : > - decrease the frame size : leads to the same result > gst-launch-1.0 -e v4l2src device=/dev/video0 ! > 'image/jpeg,width=640,height=480' ! jpegparse ! jpegdec ! videoconvert ! > videorate ! x264enc ! mp4mux ! filesink location=videotestsrc.mp4 > - record with mjpeg-streamer : works fine, the avi is played at 30 fps, not > accelerated (the AVI is definitively too large in MJPEG) > ./mjpg_streamer -i 'input_uvc.so -r 1920x1080' -o 'output_file.so -f > /home/dams -m video.avi' > > > The debug output, in 1920x1080 : > > Définition du pipeline à PAUSED... > Le pipeline est actif et n’a pas besoin de phase PREROLL… > Passage du pipeline à la phase PLAYING… > New clock: GstSystemClock > /GstPipeline:pipeline0/GstV4l2Src:v4l2src0.GstPad:src: caps = "image/jpeg\,\ > width\=\(int\)1920\,\ height\=\(int\)1080\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ colorimetry\=\(string\)2:4:7:1\,\ > framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = > "image/jpeg\,\ width\=\(int\)1920\,\ height\=\(int\)1080\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ colorimetry\=\(string\)2:4:7:1\,\ > framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstJpegParse:jpegparse0.GstPad:sink: caps = > "image/jpeg\,\ width\=\(int\)1920\,\ height\=\(int\)1080\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ colorimetry\=\(string\)2:4:7:1\,\ > framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = > "image/jpeg\,\ width\=\(int\)1920\,\ height\=\(int\)1080\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ colorimetry\=\(string\)2:4:7:1\,\ > framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstJpegParse:jpegparse0.GstPad:src: caps = > "image/jpeg\,\ parsed\=\(boolean\)true\,\ format\=\(string\)UYVY\,\ > width\=\(int\)1920\,\ height\=\(int\)1080\,\ framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:sink: caps = > "image/jpeg\,\ parsed\=\(boolean\)true\,\ format\=\(string\)UYVY\,\ > width\=\(int\)1920\,\ height\=\(int\)1080\,\ framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:src: caps = > "video/x-raw\,\ format\=\(string\)I420\,\ width\=\(int\)1920\,\ > height\=\(int\)1080\,\ interlace-mode\=\(string\)progressive\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)mpeg2\,\ > colorimetry\=\(string\)1:4:0:0\,\ framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = > "video/x-raw\,\ format\=\(string\)I420\,\ width\=\(int\)1920\,\ > height\=\(int\)1080\,\ interlace-mode\=\(string\)progressive\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)mpeg2\,\ > colorimetry\=\(string\)1:4:0:0\,\ framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstVideoRate:videorate0.GstPad:src: caps = > "video/x-raw\,\ format\=\(string\)I420\,\ width\=\(int\)1920\,\ > height\=\(int\)1080\,\ interlace-mode\=\(string\)progressive\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)mpeg2\,\ > colorimetry\=\(string\)1:4:0:0\,\ framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:sink: caps = > "video/x-raw\,\ format\=\(string\)I420\,\ width\=\(int\)1920\,\ > height\=\(int\)1080\,\ interlace-mode\=\(string\)progressive\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)mpeg2\,\ > colorimetry\=\(string\)1:4:0:0\,\ framerate\=\(fraction\)30/1" > Redistribution de latence… > /GstPipeline:pipeline0/GstVideoRate:videorate0.GstPad:sink: caps = > "video/x-raw\,\ format\=\(string\)I420\,\ width\=\(int\)1920\,\ > height\=\(int\)1080\,\ interlace-mode\=\(string\)progressive\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)mpeg2\,\ > colorimetry\=\(string\)1:4:0:0\,\ framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps = > "video/x-raw\,\ format\=\(string\)I420\,\ width\=\(int\)1920\,\ > height\=\(int\)1080\,\ interlace-mode\=\(string\)progressive\,\ > pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)mpeg2\,\ > colorimetry\=\(string\)1:4:0:0\,\ framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:src: caps = > "video/x-h264\,\ > codec_data\=\(buffer\)01640028ffe1001b67640028acd940780227e5c044000003000400000300f23c60c65801000568ebecb22c\,\ > stream-format\=\(string\)avc\,\ alignment\=\(string\)au\,\ > level\=\(string\)4\,\ profile\=\(string\)high\,\ width\=\(int\)1920\,\ > height\=\(int\)1080\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ > framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstMP4Mux:mp4mux0.GstPad:video_0: caps = > "video/x-h264\,\ > codec_data\=\(buffer\)01640028ffe1001b67640028acd940780227e5c044000003000400000300f23c60c65801000568ebecb22c\,\ > stream-format\=\(string\)avc\,\ alignment\=\(string\)au\,\ > level\=\(string\)4\,\ profile\=\(string\)high\,\ width\=\(int\)1920\,\ > height\=\(int\)1080\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ > framerate\=\(fraction\)30/1" > /GstPipeline:pipeline0/GstMP4Mux:mp4mux0.GstPad:src: caps = > "video/quicktime\,\ variant\=\(string\)iso" > /GstPipeline:pipeline0/GstFileSink:filesink0.GstPad:sink: caps = > "video/quicktime\,\ variant\=\(string\)iso" > ^Chandling interrupt. > Interruption : arrêt du pipeline… > EOS à la fermeture est activé -- EOS forcé sur le pipeline > Attente d’EOS. > /GstPipeline:pipeline0/GstMP4Mux:mp4mux0.GstPad:src: caps = > "video/quicktime\,\ variant\=\(string\)iso\,\ streamheader\=\(buffer\)\<\ > 00000cdc...\ \>" > /GstPipeline:pipeline0/GstFileSink:filesink0.GstPad:sink: caps = > "video/quicktime\,\ variant\=\(string\)iso\,\ streamheader\=\(buffer\)\<\ > 00000cdc...\ \>" > EOS reçu de l’élément « pipeline0 ». > EOS reçu - arrêt du pipeline… > Execution ended after 0:00:19.789246908 > Définition du pipeline à PAUSED... > Définition du pipeline à READY (prêt)… > Définition du pipeline à NULL… > Libération du pipeline… > > Informations about the webcam : > > v4l2-ctl --all > Driver Info (not using libv4l2): > Driver name : uvcvideo > Card type : USB 2.0 Camera > Bus info : usb-0000:00:1d.0-1.2 > Driver version: 4.4.44 > Capabilities : 0x84200001 > Video Capture > Streaming > Extended Pix Format > Device Capabilities > Device Caps : 0x04200001 > Video Capture > Streaming > Extended Pix Format > Priority: 2 > Video input : 0 (Camera 1: ok) > Format Video Capture: > Width/Height : 1920/1080 > Pixel Format : 'MJPG' > Field : None > Bytes per Line : 0 > Size Image : 4147789 > Colorspace : sRGB > Transfer Function : Default > YCbCr Encoding : Default > Quantization : Default > Flags : > Crop Capability Video Capture: > Bounds : Left 0, Top 0, Width 1920, Height 1080 > Default : Left 0, Top 0, Width 1920, Height 1080 > Pixel Aspect: 1/1 > Selection: crop_default, Left 0, Top 0, Width 1920, Height 1080 > Selection: crop_bounds, Left 0, Top 0, Width 1920, Height 1080 > Streaming Parameters Video Capture: > Capabilities : timeperframe > Frames per second: 30.000 (30/1) > Read buffers : 0 > brightness (int) : min=-64 max=64 step=1 default=0 > value=-64 > contrast (int) : min=0 max=64 step=1 default=32 > value=64 > saturation (int) : min=0 max=128 step=1 default=60 > value=128 > hue (int) : min=-40 max=40 step=1 default=0 > value=-40 > white_balance_temperature_auto (bool) : default=1 value=1 > gamma (int) : min=72 max=500 step=1 default=100 > value=100 > gain (int) : min=0 max=100 step=1 default=0 > value=100 > power_line_frequency (menu) : min=0 max=2 default=1 value=1 > white_balance_temperature (int) : min=2800 max=6500 step=1 > default=4600 value=4600 flags=inactive > sharpness (int) : min=0 max=6 step=1 default=2 > value=2 > backlight_compensation (int) : min=0 max=2 step=1 default=1 > value=1 > exposure_auto (menu) : min=0 max=3 default=3 value=3 > exposure_absolute (int) : min=1 max=5000 step=1 default=157 > value=157 flags=inactive > exposure_auto_priority (bool) : default=0 value=1 > > I would appreciate any idea. > Thank you. > > -- > Damien Picard > Expert GWT > Mob : 06 11 51 47 78 > </div>> _______________________________________________ > gstreamer-devel mailing list > <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> > <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > _______________________________________________ gstreamer-devel mailing list <a 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