<div dir="ltr"><div><div><div><div><div><div>Hi guys, </div>I'm trying to capture video from software/virtual camera in Wndows7 (64 bit if it makes sense) using ksvideosrc but faced an issue. I have got GStreamer 1.6.0 and ManyCam (<a href="https://manycam.com/">https://manycam.com/</a>) as "virtual" camera. My test pipeline and result output is like below: gst-launch-1.0.exe -v ksvideosrc device-index=1 ! videoconvert ! autovideosink Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... ERROR: from element /GstPipeline:pipeline0/GstKsVideoSrc:ksvideosrc0: Internal data flow error. Additional debug info: gstbasesrc.c(2943): gst_base_src_loop (): /GstPipeline:pipeline0/GstKsVideoSrc:ksvideosrc0: streaming task paused, reason not-negotiated (-4) ERROR: pipeline doesn't want to preroll. Setting pipeline to PAUSED ... Setting pipeline to READY ... Setting pipeline to NULL ... Freeing pipeline ... With debug logs for ksvideosrc I see that the gst_ks_video_src_set_caps() function returns 0 indicating that caps setting failed for some reason (if I read code right). gst-launch-1.0.exe -q ksvideosrc device-index=1 ! videoconvert ! autovideosink 0:00:00.170741390 2160 00000000029C6600 DEBUG ksvideosrc gstksvideosrc.c:436:gst_ks_video_src_open_device:<ksvideosrc0> device 0: name='USB Camera' path='\\?\usb#vid_0c45&pid_62f1&mi_00#6&21e90d16&0&0000#{6994ad05-93ef-11d0-a3c c-00a0c9223196}\global' 0:00:00.177066690 2160 00000000029C6600 DEBUG ksvideosrc gstksvideosrc.c:436:gst_ks_video_src_open_device:<ksvideosrc0> device 1: name='ManyCam Virtual Webcam' path='\\?\root#image#0000#{6994ad05-93ef-11d0-a3cc-00a0c9223196}\gl obal' 0:00:00.181950133 2160 00000000029C6600 WARN ksvideosrc gstksvideosrc.c:464:gst_ks_video_src_open_device:<ksvideosrc0> failed to create/open KsClock 0:00:00.185082158 2160 00000000029C6600 DEBUG ksvideosrc gstksvideodevice.c:344:gst_ks_video_device_dump_supported_property_sets: filter supports 4 property sets 0:00:00.188850852 2160 00000000029C6600 DEBUG ksvideosrc gstksvideodevice.c:348:gst_ks_video_device_dump_supported_property_sets: [0] KSPROPSETID_VIDCAP_VIDEOPROCAMP 0:00:00.192849978 2160 00000000029C6600 DEBUG ksvideosrc gstksvideodevice.c:348:gst_ks_video_device_dump_supported_property_sets: [1] KSPROPSETID_VIDCAP_VIDEOCONTROL 0:00:00.197922799 2160 00000000029C6600 DEBUG ksvideosrc gstksvideodevice.c:348:gst_ks_video_device_dump_supported_property_sets: [2] KSPROPSETID_VIDCAP_VIDEODECODER 0:00:00.202691688 2160 00000000029C6600 DEBUG ksvideosrc gstksvideodevice.c:348:gst_ks_video_device_dump_supported_property_sets: [3] KSPROPSETID_VIDCAP_VIDEOCOMPRESSION 0:00:00.207334435 2160 00000000029C6600 DEBUG ksvideosrc ksvideohelpers.c:418:ks_video_probe_filter_for_caps: pin_count = 1 0:00:00.210116176 2160 00000000029C6600 DEBUG ksvideosrc ksvideohelpers.c:437:ks_video_probe_filter_for_caps: pin[0]: pin_comm=3, pin_flow=2 0:00:00.213616032 2160 00000000029C6600 DEBUG ksvideosrc gstksvideodevice.c:415:gst_ks_video_device_open: pin[0]: found media type: video/x-raw, format=(string)RGBx, width=(int)[ 160, 1920 ], height=(int)[ 120, 1440 ], framerat e=(fraction)[ 0/1, 60/1 ], pixel-aspect-ratio=(fraction)1/1 0:00:00.228354760 2160 00000000029C6600 DEBUG ksvideosrc gstksvideodevice.c:415:gst_ks_video_device_open: pin[0]: found media type: video/x-raw, format=(string)RGBx, width=(int)[ 160, 320 ], height=(int)[ 120, 240 ], framerate= (fraction)[ 0/1, 60/1 ], pixel-aspect-ratio=(fraction)1/1 0:00:00.248404687 2160 00000000029CE240 DEBUG ksvideosrc gstksvideosrc.c:803:gst_ks_video_src_unlock_stop:<ksvideosrc0> gst_ks_video_src_unlock_stop 0:00:00.248566254 2160 00000000029C6640 DEBUG ksvideosrc gstksvideosrc.c:726:gst_ks_video_src_set_caps: Result is 0 ERROR: from element /GstPipeline:pipeline0/GstKsVideoSrc:ksvideosrc0: Internal data flow error. Additional debug info: gstbasesrc.c(2943): gst_base_src_loop (): /GstPipeline:pipeline0/GstKsVideoSrc:ksvideosrc0: streaming task paused, reason not-negotiated (-4) 0:00:00.308858400 2160 00000000029CE240 DEBUG ksvideosrc gstksvideosrc.c:791:gst_ks_video_src_unlock:<ksvideosrc0> gst_ks_video_src_unlock 0:00:00.325522363 2160 00000000029CE240 DEBUG ksvideosrc gstksvideosrc.c:791:gst_ks_video_src_unlock:<ksvideosrc0> gst_ks_video_src_unlock 0:00:00.330988839 2160 00000000029CE240 DEBUG ksvideosrc gstksvideosrc.c:803:gst_ks_video_src_unlock_stop:<ksvideosrc0> gst_ks_video_src_unlock_stop </div>I have tried to set caps explicitly but with no success. d:\gstreamer-1.6.1-64\1.0\x86_64\bin>gst-launch-1.0.exe -v ksvideosrc device-index=1 ! video/x-raw, format=RGBx, width=320, heigh=240, framerate=30/1, pixel-aspect-ratio=1/1 ! videoconvert ! autovideosink Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... ERROR: from element /GstPipeline:pipeline0/GstKsVideoSrc:ksvideosrc0: Internal data flow error. Additional debug info: gstbasesrc.c(2943): gst_base_src_loop (): /GstPipeline:pipeline0/GstKsVideoSrc:ksvideosrc0: streaming task paused, reason not-negotiated (-4) ERROR: pipeline doesn't want to preroll. Setting pipeline to PAUSED ... Setting pipeline to READY ... Setting pipeline to NULL ... Freeing pipeline ... </div>At the same time I can capture video from real USB camera with no issues. gst-launch-1.0.exe -v ksvideosrc device-index=0 ! video/x-raw, format=YUY2, width=320, heigh=240, framerate=30/1, pixel-aspect-ratio=1/1 ! videoconvert ! autovideosink Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstSystemClock /GstPipeline:pipeline0/GstKsVideoSrc:ksvideosrc0.GstPad:src: caps = "video/x-raw\,\ format\=\(string\)YUY2\,\ width\=\(int\)320\,\ height\=\(int\)240\,\ framerate\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ heigh\=\(int\)240" /GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = "video/x-raw\,\ format\=\(string\)YUY2\,\ width\=\(int\)320\,\ height\=\(int\)240\,\ framerate\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ heigh\=\(int\)240" /GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = "video/x-raw\,\ format\=\(string\)YUY2\,\ width\=\(int\)320\,\ height\=\(int\)240\,\ framerate\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ heigh\=\(int\)240" /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink.GstProxyPad:proxypad0: caps = "video/x-raw\,\ format\=\(string\)YUY2\,\ width\=\(int\)320\,\ height\=\(int\)240\,\ framerate\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ heigh\=\(int\)240" /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstD3DVideoSink:autovideosink0-actual-sink-d3dvideo.GstPad:sink: caps = "video/x-raw\,\ format\=\(string\)YUY2\,\ width\=\(int\)320\,\ height\=\(int\)240\,\ framerate\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ heigh\=\(int\)240" /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink: caps = "video/x-raw\,\ format\=\(string\)YUY2\,\ width\=\(int\)320\,\ height\=\(int\)240\,\ framerate\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ heigh\=\(int\)240" /GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps = "video/x-raw\,\ format\=\(string\)YUY2\,\ width\=\(int\)320\,\ height\=\(int\)240\,\ framerate\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ heigh\=\(int\)240" /GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = "video/x-raw\,\ format\=\(string\)YUY2\,\ width\=\(int\)320\,\ height\=\(int\)240\,\ framerate\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ heigh\=\(int\)240" ERROR: from element /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstD3DVideoSink:autovideosink0-actual-sink-d3dvideo: Output window was closed Additional debug info: d3dhelpers.c(1851): d3d_render_buffer (): /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstD3DVideoSink:autovideosink0-actual-sink-d3dvideo Execution ended after 0:00:07.170325221 Setting pipeline to PAUSED ... Setting pipeline to READY ... Setting pipeline to NULL ... Freeing pipeline ... </div>Can you guys help me with this, please? </div>Thanks, </div>Oleg </div>