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Я пишу драйвер v4l2, но у меня возникают некоторые проблемы при использовании конвейера gstreamer. Я реализовал эти операции ioctl:

• vidioc_querycap
• vidioc_s_fmt_vid_cap
• vidioc_try_fmt_vid_cap
• vidioc_enum_frameintervals
• vidioc_enum_framesizes
• vidioc_enum_input
• vidioc_enum_fmt_vid_cap

Когда я запускаю конвейер gstreamer (gst-launch-1.0 v4l2src ! видео / x-raw, формат = RGB, ширина = 4096, высота = 2160, частота кадров = 60/1 ! fakesink) Я получаю эту ошибку:

 ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Failed to allocate required memory.
Additional debug info:
../../../git/sys/v4l2/gstv4l2src.c(555): gst_v4l2src_decide_allocation (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
Buffer pool activation failed
  

Это часть выходных данных отладки из gstreamer:

 DEBUG                   v4l2 gstv4l2object.c:2858:gst_v4l2_object_setup_pool:<v4l2src0> initializing the capture system
INFO                    v4l2 gstv4l2object.c:2882:gst_v4l2_object_setup_pool:<v4l2src0> accessing buffers via mode 1
LOG                     v4l2 gstv4l2object.c:2891:gst_v4l2_object_setup_pool:<v4l2src0> initiating buffer pool
DEBUG                   v4l2 gstv4l2object.c:4035:gst_v4l2_object_decide_allocation:<v4l2src0> decide allocation
DEBUG                   v4l2 gstv4l2object.c:4061:gst_v4l2_object_decide_allocation:<v4l2src0> allocation: size:0 min:0 max:0 pool:(NULL)
DEBUG                   v4l2 gstv4l2object.c:4088:gst_v4l2_object_decide_allocation:<v4l2src0> read/write mode: no downstream pool, using our own
DEBUG                   v4l2 gstv4l2object.c:4195:gst_v4l2_object_decide_allocation:<v4l2src0> setting own pool config to GstBufferPoolConfig, caps=(GstCaps)"video/x-raw, format=(string)RGB, width=(int)4096, height=(int)2160, framerate=(fraction)60/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive", size=(uint)26542080, min-buffers=(uint)4, max-buffers=(uint)0, allocator=(GstAllocator)"NULL", params=(GstAllocationParams)NULL;
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Failed to allocate required memory.
Additional debug info:
../../../git/sys/v4l2/gstv4l2src.c(555): gst_v4l2src_decide_allocation (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
Buffer pool activation failed
Execution ended after 0:00:00.410428919
Setting pipeline to PAUSED ...
LOG                     v4l2 gstv4l2object.c:3913:gst_v4l2_object_unlock:<v4l2src0> start flushing
Setting pipeline to READY ...
LOG                     v4l2 gstv4l2object.c:3913:gst_v4l2_object_unlock:<v4l2src0> start flushing
LOG                     v4l2 gstv4l2object.c:3926:gst_v4l2_object_unlock_stop:<v4l2src0> stop flushing
DEBUG                   v4l2 gstv4l2object.c:3937:gst_v4l2_object_stop:<v4l2src0> stopping
DEBUG                   v4l2 gstv4l2object.c:3945:gst_v4l2_object_stop:<v4l2src0> deactivating pool
Setting pipeline to NULL ...
DEBUG                   v4l2 v4l2_calls.c:719:gst_v4l2_close:<v4l2src0> Trying to close /dev/video0
DEBUG                   v4l2 v4l2_calls.c:464:gst_v4l2_empty_lists:<v4l2src0> deleting enumerations
Freeing pipeline ...
  

Я не могу найти причину ошибки, возможно, я забыл операцию ioctl?

Спасибо