Gstreamer dshowvideosrc

[Nirbheek Chauhan]

Hi,

Is this a USB camera? If so, you might want to use mfvideosrc instead
of the deprecated dshowvideosrc. That element currently only exists to
pull from dshow-only devices.

Cheers,
Nirbheek

On Tue, Dec 20, 2022 at 5:34 AM Maurizio via gstreamer-devel
<gstreamer-devel at lists.freedesktop.org> wrote:
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> Hi all,
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> can someone help me on this?
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> I want to capture a windows directshow device into an h264 matroska file.
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> But this pipeline produce an empty file: (stall)
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> gst-launch-1.0.exe -v dshowvideosrc device-name="Full HD 1080P PC Camera" ! queue ! videoconvert ! nvh264enc preset=3 bitrate=1024 ! h264parse ! matroskamux ! filesink location="e:\test.mkv
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> if I replace dshowvideosrc with videotestsrc everything is ok.
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> At this point we can think dshowvideosrc is broken….but if I put an autovideosink I see my webcam without any problem
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> gst-launch-1.0.exe -v dshowvideosrc device-name="Full HD 1080P PC Camera" ! queue ! videoconvert ! autovideosink
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> so, dshowvideosrc works with an autovideosink but it do not work when encoding nvh264 or x264enc …
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> this is the log …. It simply stalls
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> Use Windows high-resolution clock, precision: 1 ms
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> Setting pipeline to PAUSED ...
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> Pipeline is live and does not need PREROLL ...
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> Got context from element 'nvh264enc0': gst.cuda.context=context, gst.cuda.context=(GstCudaContext)"\(GstCudaContext\)\ cudacontext1", cuda-device-id=(uint)0;
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> Got context from element 'nvh264enc0': gst.gl.GLDisplay=context, gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplay\)\ gldisplay0";
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> Pipeline is PREROLLED ...
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> Setting pipeline to PLAYING ...
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> /GstPipeline:pipeline0/GstDshowVideoSrc:dshowvideosrc0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, interlace-mode=(string)progressive
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> /GstPipeline:pipeline0/GstQueue:queue0.GstPad:sink: caps = video/x-raw, format=(string)YUY2, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, interlace-mode=(string)progressive
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> /GstPipeline:pipeline0/GstQueue:queue0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, interlace-mode=(string)progressive
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> /GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, format=(string)NV12, interlace-mode=(string)progressive
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> New clock: GstSystemClock
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> /GstPipeline:pipeline0/GstNvH264Enc:nvh264enc0.GstPad:sink: caps = video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, format=(string)NV12, interlace-mode=(string)progressive
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> /GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps = video/x-raw, format=(string)YUY2, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, interlace-mode=(string)progressive
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> /GstPipeline:pipeline0/GstNvH264Enc:nvh264enc0.GstPad:src: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)main, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)5/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2
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> /GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:sink: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)main, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)5/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2
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> Redistribute latency...
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> /GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:src: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)main, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)5/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2, coded-picture-structure=(string)frame, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, codec_data=(buffer)014d4028ffe10019674d402895a01e0089f97016a020202800001f40000138842001000468ee3c80
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> /GstPipeline:pipeline0/GstMatroskaMux:matroskamux0.GstMatroskamuxPad:video_0: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)main, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)5/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2, coded-picture-structure=(string)frame, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, codec_data=(buffer)014d4028ffe10019674d402895a01e0089f97016a020202800001f40000138842001000468ee3c80
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> /GstPipeline:pipeline0/GstMatroskaMux:matroskamux0.GstPad:src: caps = video/x-matroska
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> /GstPipeline:pipeline0/GstFileSink:filesink0.GstPad:sink: caps = video/x-matroska
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> Redistribute latency...
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> /GstPipeline:pipeline0/GstMatroskaMux:matroskamux0.GstPad:src: caps = video/x-matroska, streamheader=(buffer)< 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 >
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> /GstPipeline:pipeline0/GstFileSink:filesink0.GstPad:sink: caps = video/x-matroska, streamheader=(buffer)< 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 >
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> 1000:00:0 / 99:99:99.