我正在运行一个烧瓶应用程序，该应用程序已打开相机并使用gstreamer作为功能捕获屏幕快照并保存，有时相机功能正常，但有时会出现“缓冲池激活失败”错误。
我已经使用以下命令设置了显示和格式：
export DISPLAY=:0
media-ctl -v --set-format '"OV9650":0 [YUYV 320x240]'
要运行相机，我正在使用此命令-
gst-launch-1.0 v4l2src device=/dev/video1 ! videoconvert ! ximagesink
这是详细的错误-
[ 884.252722] __fimc_pipeline_open(): No sensor subdev
[ 884.256364] __fimc_pipeline_close(): No sensor subdev
[ 884.500330] v4l2src0:src: page allocation failure: order:6,
mode:0x6000c0(GFP_KERNEL), nodemask=(null)
[ 884.508217] CPU: 0 PID: 1225 Comm: v4l2src0:src Not tainted 4.19.0
#330
[ 884.514814] Hardware name: Samsung S5PC110/S5PV210-based board
[ 884.520607] [<8010e5f0>] (unwind_backtrace) from [<8010bc70>]
(show_stack+0x10/0x14)
[ 884.528298] [<8010bc70>] (show_stack) from [<801bf168>]
(warn_alloc+0xc4/0x15c)
[ 884.535602] [<801bf168>] (warn_alloc) from [<801bfba0>]
(__alloc_pages_nodemask+0x904/0xc88)
[ 884.544000] [<801bfba0>] (__alloc_pages_nodemask) from [<80114b7c>]
(__dma_alloc_buffer.constprop.10+0x30/0x88)
[ 884.554060] [<80114b7c>] (__dma_alloc_buffer.constprop.10) from
[<80114bf8>] (__alloc_remap_buffer+0x24/0xa0)
[ 884.563925] [<80114bf8>] (__alloc_remap_buffer) from [<80114ca0>]
(remap_allocator_alloc+0x2c/0x34)
[ 884.572945] [<80114ca0>] (remap_allocator_alloc) from [<80112ac4>]
(__dma_alloc+0x1d0/0x298)
[ 884.581336] [<80112ac4>] (__dma_alloc) from [<80112c08>]
(arm_dma_alloc+0x40/0x48)
[ 884.588884] [<80112c08>] (arm_dma_alloc) from [<8058beec>]
(vb2_dc_alloc+0xe0/0x1bc)
[ 884.596559] [<8058beec>] (vb2_dc_alloc) from [<80586778>]
(__vb2_queue_alloc+0x160/0x40c)
[ 884.604754] [<80586778>] (__vb2_queue_alloc) from [<80587d10>]
(vb2_core_reqbufs+0x170/0x3a8)
[ 884.613235] [<80587d10>] (vb2_core_reqbufs) from [<8058a400>]
(vb2_ioctl_reqbufs+0x5c/0x80)
[ 884.621546] [<8058a400>] (vb2_ioctl_reqbufs) from [<80591350>]
(fimc_cap_reqbufs+0x28/0x38)
[ 884.629881] [<80591350>] (fimc_cap_reqbufs) from [<80573b24>]
(__video_do_ioctl+0x390/0x4c8)
[ 884.638236] [<80573b24>] (__video_do_ioctl) from [<805770e8>]
(video_usercopy+0x254/0x548)
[ 884.646514] [<805770e8>] (video_usercopy) from [<8022a9b0>]
(do_vfs_ioctl+0xac/0x880)
[ 884.654317] [<8022a9b0>] (do_vfs_ioctl) from [<8022b1e8>]
(ksys_ioctl+0x64/0x74)
[ 884.661672] [<8022b1e8>] (ksys_ioctl) from [<80101000>]
(ret_fast_syscall+0x0/0x28)
[ 884.669280] Exception stack(0x86c2bfa8 to 0x86c2bff0)
[ 884.674279] bfa0: 76fa6ce8 00012c08 00000007
c0145608 759fec00 c0445611
[ 884.682461] bfc0: 76fa6ce8 00012c08 7480e3f8 00000036 76fa6ce8
00000007 c0145608 7683b000
[ 884.690594] bfe0: 759fe6e8 759fe6d8 76f6da49 76ce91c2
[ 884.695594] Mem-Info:
[ 884.697856] active_anon:29103 inactive_anon:647 isolated_anon:0
[ 884.697856] active_file:17776 inactive_file:7172 isolated_file:0
[ 884.697856] unevictable:8 dirty:3 writeback:0 unstable:0
[ 884.697856] slab_reclaimable:1044 slab_unreclaimable:2641
[ 884.697856] mapped:16893 shmem:735 pagetables:688 bounce:0
[ 884.697856] free:1530 free_pcp:0 free_cma:0
[ 884.730480] Node 0 active_anon:116412kB inactive_anon:2588kB
active_file:71104kB inactive_file:28688kB unevictable:32kB
isolated(anon):0kB isolated(file):0kB mapped:67572kB dirty:12kB
writeback:0kB shmem:2940kB writeback_tmp:0kB unstable:0kB
all_unreclaimable? no
[ 884.753698] Normal free:6120kB min:1988kB low:2484kB high:2980kB
active_anon:116412kB inactive_anon:2588kB active_file:71104kB
inactive_file:28688kB unevictable:32kB writepending:12kB
present:262144kB managed:248540kB mlocked:32kB kernel_stack:1336kB
pagetables:2752kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
[ 884.781769] lowmem_reserve[]: 0 0
[ 884.785019] Normal: 288*4kB (UME) 175*8kB (UME) 63*16kB (UME) 34*32kB
(UME) 13*64kB (UME) 5*128kB (M) 0*256kB 0*512kB 0*1024kB 0*2048kB
0*4096kB = 6120kB
[ 884.798748] 25683 total pagecache pages
[ 884.802523] 0 pages in swap cache
[ 884.805816] Swap cache stats: add 0, delete 0, find 0/0
[ 884.811048] Free swap = 0kB
[ 884.813874] Total swap = 0kB
[ 884.816735] 65536 pages RAM
[ 884.819548] 0 pages HighMem/MovableOnly
[ 884.823339] 3401 pages reserved
[ 884.826439] 0 pages cma reserved
[ 884.829693] exynos4-fimc fb200000.fimc: dma_alloc_coherent of size
258048 failed
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Failed
to allocate required memory.
Additional debug info:
gstv4l2src.c(531): gst_v4l2src_decide_allocation ():
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
Buffer pool activation failed