Gstreamer 到v4l2loopback设备的流媒体链接不可靠

目标
我必须打开Blackmagic decklink捕获并将其传输到v4l2loopback设备，以便在electron中使用WebRTC公开打开它。我有一个管道设置，在我早期的开发工作中工作可靠。有些事情发生了变化，我无法再可靠地打开管道。我对

gst

调试有点缺乏经验，因此非常感谢您的帮助

详细信息 我一直在使用的管道如下所示：

gst-launch-1.0 version 1.14.5,  
GStreamer 1.14.5,  
blackmagic, 11.2a8,  

以下是来自该管道的标准输出/标准输出：

gst-launch-1.0 -v decklinkvideosrc mode=15 connection=hdmi video-format=1 ! \
video/x-raw,format=UYVY,width=1920 ! \
videoconvert ! \
v4l2sink device=/dev/video7

我插入了视频为7的v4l2loopback模块，视频设备确实出现在

/dev

中

更多信息

我知道源代码是有效的，因为我可以按如下方式打开“预览”：

Pipeline is live and does not need PREROLL ...
/GstPipeline:pipeline0/GstDecklinkVideoSrc:decklinkvideosrc0: hw-serial-number =
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstDecklinkVideoSrc:decklinkvideosrc0.GstPad:src: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)bt709, chroma-site=(string)mpeg2
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)bt709, chroma-site=(string)mpeg2
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)2:4:7:1
/GstPipeline:pipeline0/GstV4l2Sink:v4l2sink0.GstPad:sink: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)2:4:7:1
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)bt709, chroma-site=(string)mpeg2
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)bt709, chroma-site=(string)mpeg2
ERROR: from element /GstPipeline:pipeline0/GstDecklinkVideoSrc:decklinkvideosrc0: Internal data stream error.
Additional debug info:
gstbasesrc.c(3055): gst_base_src_loop (): /GstPipeline:pipeline0/GstDecklinkVideoSrc:decklinkvideosrc0:
streaming stopped, reason error (-5)
Execution ended after 0:00:00.097652127
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...

标准件/标准件：

gst-launch-1.0 -v decklinkvideosrc mode=15 connection=hdmi video-format=1 ! \
video/x-raw,format=UYVY,width=1920 ! \
videoconvert ! \
ximagesink

---

此外

使用其他源测试流产生了大致相同的行为：

Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
/GstPipeline:pipeline0/GstDecklinkVideoSrc:decklinkvideosrc0: hw-serial-number = 
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstDecklinkVideoSrc:decklinkvideosrc0.GstPad:src: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)bt709, chroma-site=(string)mpeg2
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)bt709, chroma-site=(string)mpeg2
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)BGRx
/GstPipeline:pipeline0/GstXImageSink:ximagesink0.GstPad:sink: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)BGRx
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)bt709, chroma-site=(string)mpeg2
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = video/x-raw, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, framerate=(fraction)60000/1001, format=(string)UYVY, colorimetry=(string)bt709, chroma-site=(string)mpeg2

$ gst-launch-1.0 -v videotestsrc pattern=snow ! video/x-raw,width=1280,height=720 ! v4l2sink device=/dev/video7

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)1280, height=(int)720, framerate=(fraction)30/1, multiview-mode=(string)mono, interlace-mode=(string)progressive, colorimetry=(string)2:4:7:1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)1280, height=(int)720, framerate=(fraction)30/1, multiview-mode=(string)mono, interlace-mode=(string)progressive, colorimetry=(string)2:4:7:1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstV4l2Sink:v4l2sink0.GstPad:sink: caps = video/x-raw, format=(string)YUY2, width=(int)1280, height=(int)720, framerate=(fraction)30/1, multiview-mode=(string)mono, interlace-mode=(string)progressive, colorimetry=(string)2:4:7:1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = video/x-raw, format=(string)YUY2, width=(int)1280, height=(int)720, framerate=(fraction)30/1, multiview-mode=(string)mono, interlace-mode=(string)progressive, colorimetry=(string)2:4:7:1, pixel-aspect-ratio=(fraction)1/1
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
ERROR: from element /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0: Internal data stream error.
Additional debug info:
gstbasesrc.c(3055): gst_base_src_loop (): /GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0:
streaming stopped, reason error (-5)
Execution ended after 0:00:00.033580044
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...