Gstreamer v4l2src: Failed to allocate required memory

Andrea andrea.rossetto at videomed.biz
Wed Mar 27 08:36:22 UTC 2019 

I've installed v4l2-utils and run v4l2-compliance.

v4l2-compliance SHA   : not available

Driver Info:
        Driver name   : video
        Card type     : PL video
        Bus info      : platform:Pl-0.0.0
        Driver version: 4.14.0
        Capabilities  : 0x81200001
                Video Capture
                Read/Write
                Extended Pix Format
                Device Capabilities
        Device Caps   : 0x01200001
                Video Capture
                Read/Write
                Extended Pix Format

Compliance test for device /dev/video0 (not using libv4l2):

Required ioctls:
        test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
        test second video open: OK
        test VIDIOC_QUERYCAP: OK
        test VIDIOC_G/S_PRIORITY: OK
        test for unlimited opens: OK

Debug ioctls:
        test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
        test VIDIOC_LOG_STATUS: OK (Not Supported)

Input ioctls:
        test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
        test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
        test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
        test VIDIOC_ENUMAUDIO: OK (Not Supported)
        test VIDIOC_G/S/ENUMINPUT: OK
        test VIDIOC_G/S_AUDIO: OK (Not Supported)
        Inputs: 1 Audio Inputs: 0 Tuners: 0

Output ioctls:
        test VIDIOC_G/S_MODULATOR: OK (Not Supported)
        test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
        test VIDIOC_ENUMAUDOUT: OK (Not Supported)
        test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
        test VIDIOC_G/S_AUDOUT: OK (Not Supported)
        Outputs: 0 Audio Outputs: 0 Modulators: 0

Input/Output configuration ioctls:
        test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
        test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
        test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
        test VIDIOC_G/S_EDID: OK (Not Supported)

Test input 0:

        Control ioctls:
                test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK (Not Supported)
                test VIDIOC_QUERYCTRL: OK (Not Supported)
                test VIDIOC_G/S_CTRL: OK (Not Supported)
                test VIDIOC_G/S/TRY_EXT_CTRLS: OK (Not Supported)
                test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK (Not Supported)
                test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
                Standard Controls: 0 Private Controls: 0

        Format ioctls:
                test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
                warn:
../../../v4l-utils-1.12.3/utils/v4l2-compliance/v4l2-test-formats.cpp(1121):
V4L2_MODE_HIGHQUALITY is poorly defined
                warn:
../../../v4l-utils-1.12.3/utils/v4l2-compliance/v4l2-test-formats.cpp(1121):
V4L2_MODE_HIGHQUALITY is poorly defined
                test VIDIOC_G/S_PARM: OK
                test VIDIOC_G_FBUF: OK (Not Supported)
                test VIDIOC_G_FMT: OK
                warn:
../../../v4l-utils-1.12.3/utils/v4l2-compliance/v4l2-test-formats.cpp(717):
TRY_FMT cannot handle an invalid pixelformat.
                warn:
../../../v4l-utils-1.12.3/utils/v4l2-compliance/v4l2-test-formats.cpp(718):
This may or may not be a problem. For more information see:
                warn:
../../../v4l-utils-1.12.3/utils/v4l2-compliance/v4l2-test-formats.cpp(719):
http://www.mail-archive.com/linux-media@vger.kernel.org/msg56550.html
                test VIDIOC_TRY_FMT: OK
                warn:
../../../v4l-utils-1.12.3/utils/v4l2-compliance/v4l2-test-formats.cpp(977):
S_FMT cannot handle an invalid pixelformat.
                warn:
../../../v4l-utils-1.12.3/utils/v4l2-compliance/v4l2-test-formats.cpp(978):
This may or may not be a problem. For more information see:
                warn:
../../../v4l-utils-1.12.3/utils/v4l2-compliance/v4l2-test-formats.cpp(979):
http://www.mail-archive.com/linux-media@vger.kernel.org/msg56550.html
                test VIDIOC_S_FMT: OK
                test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
                test Cropping: OK (Not Supported)
                test Composing: OK (Not Supported)
                test Scaling: OK (Not Supported)

        Codec ioctls:
                test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
                test VIDIOC_G_ENC_INDEX: OK (Not Supported)
                test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)

        Buffer ioctls:
                test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK (Not Supported)
                test VIDIOC_EXPBUF: OK (Not Supported)

Test input 0:


Total: 43, Succeeded: 43, Failed: 0, Warnings: 8

After solving some fail, lanching again the pipeline the error did not
change:

DEBUG                   v4l2
gstv4l2object.c:4061:gst_v4l2_object_decide_allocation:<v4l2src0>
allocation: size:26542080 min:2 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:4186:gst_v4l2_object_decide_allocation:<v4l2src0> activate
Video Meta
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\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\
interlace-mode\=\(string\)progressive\,\ colorimetry\=\(string\)sRGB",
size=(uint)26542080, min-buffers=(uint)4, max-buffers=(uint)0,
allocator=(GstAllocator)"NULL", params=(GstAllocationParams)NULL,
options=(string)< GstBufferPoolOptionVideoMeta >;
DEBUG         v4l2bufferpool
gstv4l2bufferpool.c:509:gst_v4l2_buffer_pool_set_config:<v4l2src0:pool:src>
config GstBufferPoolConfig, caps=(GstCaps)"video/x-raw\,\
format\=\(string\)RGB\,\ width\=\(int\)4096\,\ height\=\(int\)2160\,\
framerate\=\(fraction\)30/1\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\
interlace-mode\=\(string\)progressive\,\ colorimetry\=\(string\)sRGB",
size=(uint)26542080, min-buffers=(uint)4, max-buffers=(uint)0,
allocator=(GstAllocator)"NULL", params=(GstAllocationParams)NULL,
options=(string)< GstBufferPoolOptionVideoMeta >;
DEBUG         v4l2bufferpool
gstv4l2bufferpool.c:707:gst_v4l2_buffer_pool_start:<v4l2src0:pool:src>
activating pool
DEBUG         v4l2bufferpool
gstv4l2bufferpool.c:1414:gst_v4l2_buffer_pool_release_buffer:<v4l2src0:pool:src>
release buffer 0x7f7c0110e0
DEBUG         v4l2bufferpool
gstv4l2bufferpool.c:1414:gst_v4l2_buffer_pool_release_buffer:<v4l2src0:pool:src>
release buffer 0x7f7c0111f0
DEBUG         v4l2bufferpool
gstv4l2bufferpool.c:1414:gst_v4l2_buffer_pool_release_buffer:<v4l2src0:pool:src>
release buffer 0x7f7c011300
DEBUG         v4l2bufferpool
gstv4l2bufferpool.c:1414:gst_v4l2_buffer_pool_release_buffer:<v4l2src0:pool:src>
release buffer 0x7f7c011410
ERROR         v4l2bufferpool
gstv4l2bufferpool.c:888:gst_v4l2_buffer_pool_start:<v4l2src0:pool:src>
failed to queue buffers into the capture queue
WARN                 v4l2src
gstv4l2src.c:555:gst_v4l2src_decide_allocation:<v4l2src0> error: Failed to
allocate required memory.
WARN                 v4l2src
gstv4l2src.c:555:gst_v4l2src_decide_allocation:<v4l2src0> 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(555): gst_v4l2src_decide_allocation ():
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
Buffer pool activation failed




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