我想知道是否有一些特定的配置可以从 4K 传感器流式传输视频，好吗？我正在使用以下命令：
GST_DEBUG=3 gst-launch-1.0 -v v4l2src device=/dev/video0 ! "video/x-raw,format=YUY2,width=3840,height=2160,framerate=5/1" ! queue ! imxvideoconvert_g2d ! waylandsink > gst-debug-4k.txt 2>&1并为以下错误而苦苦挣扎：
Set
ting pipeline to PAUSED ...
0:00:00.494213500 [33m 974[00m 0xaaaaced3ad20 [33;01mWARN [00m [00m v4l2 v4l2_calls.c:530:gst_v4l2_subscribe_event:
[00m /dev/video0 cannot subscribe V4L2_EVENT_SOURCE_CHANGE event.
0:00:00.494305000 [33m 974[00m 0xaaaaced3ad20 [33;01mWARN [00m [00m v4l2 v4l2_calls.c:538:gst_v4l2_subscribe_event:[00m /dev/video0 cannot subscribe V4L2_EVENT_EOS event.
0:00:00.494339625 [33m 974[00m 0xaaaaced3ad20 [33;01mWARN [00m [00m v4l2 v4l2_calls.c:545:gst_v4l2_subscribe_event:[00m /dev/video0 cannot subscribe V4L2_EVENT_DECODE_ERROR event.
Pipeline is live and does not need PREROLL ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)3840, height=(int)2160, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)2:6:11:1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)3840, height=(int)2160, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)2:6:11:1
0:00:06.306039000 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:sink: caps = video/x-raw, format=(string)YUY2, width=(int)3840, height=(int)2160, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)2:6:11:1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps = video/x-raw, format=(string)YUY2, width=(int)3840, height=(int)2160, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)2:6:11:1
0:00:06.318713500 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)3840, height=(int)2160, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)2:6:11:1
/GstPipeline:pipeline0/imxvideoconvert_g2d:imxvideoconvert_g2d0.GstPad:src: caps = video/x-raw, width=(int)3840, height=(int)2160, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)2:6:11:1, format=(string)BGRx
0:00:06.318993750 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
0:00:06.319405125 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
/GstPipeline:pipeline0/GstWaylandSink:waylandsink0.GstPad:sink: caps = video/x-raw, width=(int)3840, height=(int)2160, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)2:6:11:1, format=(string)BGRx
0:00:06.320007375 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
0:00:06.320084375 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
0:00:06.320202000 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
0:00:06.320372500 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
0:00:06.320476125 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
0:00:06.320547125 [33m 974[00m 0xaaaacee1b120 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 6 for RGB format, using RGB
/GstPipeline:pipeline0/imxvideoconvert_g2d:imxvideoconvert_g2d0.GstPad:sink: caps = video/x-raw, format=(string)YUY2, width=(int)3840, height=(int)2160, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)2:6:11:1
0:00:07.020096875 [33m 974[00m 0xaaaacee1ab00 [31;01mERROR [00m [00m v4l2allocator gstv4l2allocator.c:740:gst_v4l2_allocator_start:[00m error requesting 3 buffers: Resource temporarily unavailable
0:00:07.020211125 [33m 974[00m 0xaaaacee1ab00 [31;01mERROR [00m [00m v4l2bufferpool gstv4l2bufferpool.c:926:gst_v4l2_buffer_pool_start:[00m we received 0 buffer from device '/dev/video0', we want at least 2
0:00:07.020254500 [33m 974[00m 0xaaaacee1ab00 [31;01mERROR [00m [00m bufferpool gstbufferpool.c:559:gst_buffer_pool_set_active:[00m start failed
0:00:07.020296625 [33m 974[00m 0xaaaacee1ab00 [33;01mWARN [00m [00m v4l2src gstv4l2src.c:659:gst_v4l2src_decide_allocation:[00m error: Failed to allocate required memory.
0:00:07.020327500 [33m 974[00m 0xaaaacee1ab00 [33;01mWARN [00m [00m v4l2src gstv4l2src.c:659:gst_v4l2src_decide_allocation:[00m error: Buffer pool activation failed
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Failed to allocate required memory.
Additional debug info:
../git/sys/v4l2/gstv4l2src.c(659): gst_v4l2src_decide_allocation (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
Buffer pool activation failed
0:00:07.020575750 [33m 974[00m 0xaaaacee1ab00 [33;01mWARN [00m [00m basesrc gstbasesrc.c:3347:gst_base_src_prepare_allocation:[00m Subclass failed to decide allocation
Execution ended after 0:00:06.524860500
Setting pipeline to NULL ...
0:00:07.020640125 [33m 974[00m 0xaaaacee1ab00 [33;01mWARN [00m [00m basesrc gstbasesrc.c:3127:gst_base_src_loop:[00m error: Internal data stream error.
0:00:07.020678375 [33m 974[00m 0xaaaacee1ab00 [33;01mWARN [00m [00m basesrc gstbasesrc.c:3127:gst_base_src_loop:[00m error: streaming stopped, reason not-negotiated (-4)
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data stream error.
Additional debug info:
../git/libs/gst/base/gstbasesrc.c(3127): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming stopped, reason not-negotiated (-4)
Freeing pipeline ...
同时，它适用于我的 1440x1080 传感器（只需切换 dtb）：
GST_DEBUG=3 gst-launch-1.0 -v v4l2src device=/dev/video0 ! "video/x-raw,format=YUY2,width=1440,height=1080" ! queue ! imxvideoconvert_g2d ! waylandsink > gst-debug-1440x1080.txt 2>&1
Setting pipeline to PAUSED ...
0:00:00.498230625 [32m 991[00m 0xaaaae2a90690 [33;01mWARN [00m [00m v4l2 v4l2_calls.c:530:gst_v4l2_subscribe_event:[00m /dev/video0 cannot subscribe V4L2_EVENT_SOURCE_CHANGE event.
0:00:00.498305750 [32m 991[00m 0xaaaae2a90690 [33;01mWARN [00m [00m v4l2 v4l2_calls.c:538:gst_v4l2_subscribe_event:[00m /dev/video0 cannot subscribe V4L2_EVENT_EOS event.
0:00:00.498336375 [32m 991[00m 0xaaaae2a90690 [33;01mWARN [00m [00m v4l2 v4l2_calls.c:545:gst_v4l2_subscribe_event:[00m /dev/video0 cannot subscribe V4L2_EVENT_DECODE_ERROR event.
Pipeline is live and does not need PREROLL ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)1440, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)bt709
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)1440, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)bt709
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:sink: caps = video/x-raw, format=(string)YUY2, width=(int)1440, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)bt709
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)1440, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)bt709
/GstPipeline:pipeline0/GstQueue:queue0.GstPad:src: caps = video/x-raw, format=(string)YUY2, width=(int)1440, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)bt709
0:00:00.574127750 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
/GstPipeline:pipeline0/imxvideoconvert_g2d:imxvideoconvert_g2d0.GstPad:src: caps = video/x-raw, width=(int)1440, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, format=(string)BGRx
0:00:00.574332500 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
0:00:00.574563125 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
0:00:00.574951375 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
/GstPipeline:pipeline0/GstWaylandSink:waylandsink0.GstPad:sink: caps = video/x-raw, width=(int)1440, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, format=(string)BGRx
0:00:00.575204500 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
0:00:00.575268250 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
0:00:00.575555375 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
0:00:00.575705750 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
0:00:00.575749125 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
0:00:00.575817250 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m video-info video-info.c:526:gst_video_info_from_caps:[00m invalid matrix 3 for RGB format, using RGB
/GstPipeline:pipeline0/imxvideoconvert_g2d:imxvideoconvert_g2d0.GstPad:sink: caps = video/x-raw, format=(string)YUY2, width=(int)1440, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, colorimetry=(string)bt709
0:00:00.920576250 [32m 991[00m 0xaaaae2beb520 [33;01mWARN [00m [00m waylandsink wlwindow.c:441:gst_wl_window_new_internal:[00m init surface_state fail, fallback to scale=1 fullscreen (1920x1048)
handling interrupt.
Interrupt: Stopping pipeline ...
Execution ended after 0:00:13.554667000
Setting pipeline to NULL ...
Total showed frames (395), playing for (0:00:13.554668125), fps (29.141).
CMA分配：
root@imx8mpevk:~# dmesg | grep -i cma
[ 0.000000] Reserved memory: created CMA memory pool at 0x00000000c4000000, size 960 MiB
[ 0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
[ 0.000000] Memory: 4759752K/6258688K available (18304K kernel code, 1914K rwdata, 7524K rodata, 3648K init, 550K bss, 515896K reserved, 983040K cma-reserved)
我正在使用 BSP LF-5.10.72-2.2.0。附件是两种情况下gst-launch命令和相关dmesg的输出。
