Hi Honey_Patouceul, thanks for the quick response and the explanations.
The YUYV command works awesome at 10 frames per second. Thanks :-) … I was hoping to get 30, so I’m trying your MJPG suggestions.
However, the first MJPG suggestion displays the window with the camera feed inside, but the camera feed looks like a still image. I did see, like, maybe 3 image updates in the window but that is it. The stdout indicates the computer is too slow.
gst-launch-1.0 -v v4l2src device=/dev/video0 ! image/jpeg,format=MJPG,width=1280,height=720,framerate=30/1 ! jpegparse ! nvv4l2decoder mjpeg=1 ! nvvidconv ! queue ! xvimagesink
Setting pipeline to PAUSED ...
Opening in BLOCKING MODE
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0.GstPad:src: caps = image/jpeg, format=(string)MJPG, width=(int)1280, height=(int)720, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = image/jpeg, format=(string)MJPG, width=(int)1280, height=(int)720, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstJpegParse:jpegparse0.GstPad:sink: caps = image/jpeg, format=(string)MJPG, width=(int)1280, height=(int)720, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = image/jpeg, format=(string)MJPG, width=(int)1280, height=(int)720, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstJpegParse:jpegparse0.GstPad:src: caps = image/jpeg, parsed=(boolean)true, format=(string)UYVY, width=(int)1280, height=(int)720, framerate=(fraction)30/1
NvMMLiteOpen : Block : BlockType = 277
NVMEDIA: Reading vendor.tegra.display-size : status: 6
NvMMLiteBlockCreate : Block : BlockType = 277
/GstPipeline:pipeline0/nvv4l2decoder:nvv4l2decoder0.GstPad:sink: caps = image/jpeg, parsed=(boolean)true, format=(string)UYVY, width=(int)1280, height=(int)720, framerate=(fraction)30/1
/GstPipeline:pipeline0/nvv4l2decoder:nvv4l2decoder0.GstPad:src: caps = video/x-raw(memory:NVMM), format=(string)I420, width=(int)1280, height=(int)720, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)30/1, nvbuf-memory-type=(string)nvbuf-mem-surface-array, gpu-id=(int)0
/GstPipeline:pipeline0/Gstnvvconv:nvvconv0.GstPad:src: caps = video/x-raw, width=(int)1280, height=(int)720, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1, nvbuf-memory-type=(string)nvbuf-mem-surface-array, gpu-id=(int)0, format=(string)YUY2
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:sink: caps = video/x-raw, width=(int)1280, height=(int)720, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1, nvbuf-memory-type=(string)nvbuf-mem-surface-array, gpu-id=(int)0, format=(string)YUY2
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:src: caps = video/x-raw, width=(int)1280, height=(int)720, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1, nvbuf-memory-type=(string)nvbuf-mem-surface-array, gpu-id=(int)0, format=(string)YUY2
/GstPipeline:pipeline0/GstXvImageSink:xvimagesink0.GstPad:sink: caps = video/x-raw, width=(int)1280, height=(int)720, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1, nvbuf-memory-type=(string)nvbuf-mem-surface-array, gpu-id=(int)0, format=(string)YUY2
/GstPipeline:pipeline0/Gstnvvconv:nvvconv0.GstPad:sink: caps = video/x-raw(memory:NVMM), format=(string)I420, width=(int)1280, height=(int)720, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)30/1, nvbuf-memory-type=(string)nvbuf-mem-surface-array, gpu-id=(int)0
WARNING: from element /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0: A lot of buffers are being dropped.
Additional debug info:
gstbasesink.c(3003): gst_base_sink_is_too_late (): /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0:
There may be a timestamping problem, or this computer is too slow.
WARNING: from element /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0: A lot of buffers are being dropped.
Additional debug info:
gstbasesink.c(3003): gst_base_sink_is_too_late (): /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0:
There may be a timestamping problem, or this computer is too slow.
The second MJPG suggestion still has the “not negotiated” result:
svs@ubuntu:~/jetson-inference$ gst-launch-1.0 -v v4l2src device=/dev/video0 ! image/jpeg,format=MJPG,width=1280,height=720,framerate=30/1 ! jpegparse ! nvjpegdec ! nvvidconv ! queue ! xvimagesink
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0.GstPad:src: caps = image/jpeg, format=(string)MJPG, width=(int)1280, height=(int)720, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = image/jpeg, format=(string)MJPG, width=(int)1280, height=(int)720, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstJpegParse:jpegparse0.GstPad:sink: caps = image/jpeg, format=(string)MJPG, width=(int)1280, height=(int)720, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = image/jpeg, format=(string)MJPG, width=(int)1280, height=(int)720, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstJpegParse:jpegparse0.GstPad:src: caps = image/jpeg, parsed=(boolean)true, format=(string)UYVY, width=(int)1280, height=(int)720, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstNvJpegDec:nvjpegdec0.GstPad:sink: caps = image/jpeg, parsed=(boolean)true, format=(string)UYVY, width=(int)1280, height=(int)720, framerate=(fraction)30/1
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data stream error.
Additional debug info:
gstbasesrc.c(3072): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming stopped, reason not-negotiated (-4)
Execution ended after 0:00:00.699569015
Setting pipeline to NULL ...
Freeing pipeline ...
As for the nvgstcapture utility, another developer asked a similar question to mine and NVIDIA referred them to an FAQ page that in turn sends us to the following NVIDIA document instructing us to use nvgstcapture even for basic USB camera testing:
So, thanks again… looks like we are 60% there! Any follow-up suggestions on what to try next for the MJPG mechanism @ 30 fps?