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v4l2compress_h264 : VIDIOC_REQBUFS: Device or resource busy #18

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dony71 opened this issue Dec 29, 2018 · 3 comments
Closed

v4l2compress_h264 : VIDIOC_REQBUFS: Device or resource busy #18

dony71 opened this issue Dec 29, 2018 · 3 comments

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@dony71
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dony71 commented Dec 29, 2018

Run "v4l2compress_h264 /dev/video0 /dev/video10 -vvv"
got error below

2018-12-28 16:50:34,577 [INFO ] - v4l2wrapper/inc/logger.h:44
level:DEBUG
2018-12-28 16:50:34,578 [NOTICE] - src/V4l2Device.cpp:117
driver:ov534 capabilities:85200001 mandatory:4000001
2018-12-28 16:50:34,578 [NOTICE] - src/V4l2Device.cpp:120
/dev/video0 support capture
2018-12-28 16:50:34,578 [NOTICE] - src/V4l2Device.cpp:122
/dev/video0 support read/write
2018-12-28 16:50:34,578 [NOTICE] - src/V4l2Device.cpp:123
/dev/video0 support streaming
2018-12-28 16:50:34,578 [NOTICE] - src/V4l2Device.cpp:147
/dev/video0:YUYV size:640x480
2018-12-28 16:50:34,618 [NOTICE] - src/V4l2Device.cpp:229
fps:1/25
2018-12-28 16:50:34,618 [NOTICE] - src/V4l2Device.cpp:230
nbBuffer:2
VIDIOC_REQBUFS: Device or resource busy
2018-12-28 16:50:34,619 [NOTICE] - src/V4l2Device.cpp:117
driver:v4l2 loopback capabilities:85208003 mandatory:4000002
2018-12-28 16:50:34,619 [NOTICE] - src/V4l2Device.cpp:119
/dev/video10 support output
2018-12-28 16:50:34,619 [NOTICE] - src/V4l2Device.cpp:120
/dev/video10 support capture
2018-12-28 16:50:34,619 [NOTICE] - src/V4l2Device.cpp:122
/dev/video10 support read/write
2018-12-28 16:50:34,619 [NOTICE] - src/V4l2Device.cpp:123
/dev/video10 support streaming
2018-12-28 16:50:34,619 [NOTICE] - src/V4l2Device.cpp:147
/dev/video10:H264 size:640x480
2018-12-28 16:50:34,619 [NOTICE] - src/V4l2MmapDevice.cpp:71
Device /dev/video10 nb buffer:8
2018-12-28 16:50:34,619 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:0 size:0
mmap: Invalid argument
2018-12-28 16:50:34,619 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:1 size:0
mmap: Invalid argument
2018-12-28 16:50:34,620 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:2 size:0
mmap: Invalid argument

v4l2-ctl --all -d /dev/video10
Driver Info (not using libv4l2):
Driver name : v4l2 loopback
Card type : Dummy video device (0x0000)
Bus info : platform:v4l2loopback-000
Driver version: 4.14.78
Capabilities : 0x85208003
Video Capture
Video Output
Video Memory-to-Memory
Read/Write
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x85208003
Video Capture
Video Output
Video Memory-to-Memory
Read/Write
Streaming
Extended Pix Format
Device Capabilities
Priority: 0
Video input : 0 (loopback: ok)
Video output: 0 (loopback in)
Format Video Output:
Width/Height : 640/480
Pixel Format : 'H264'
Field : None
Bytes per Line : 0
Size Image : 1228800
Colorspace : sRGB
Transfer Function : Default
YCbCr/HSV Encoding: Default
Quantization : Default
Flags :
Streaming Parameters Video Capture:
Frames per second: 30.000 (30/1)
Read buffers : 8
Streaming Parameters Video Output:
Frames per second: 30.000 (30/1)
Write buffers : 8
User Controls
keep_format (bool) : default=0 value=0
sustain_framerate (bool) : default=0 value=0
timeout (int) : min=0 max=100000 step=1 default=0 value=0
timeout_image_io (bool) : default=0 value=0

v4l2-ctl --all -d /dev/video0
Driver Info (not using libv4l2):
Driver name : ov534
Card type : USB Camera-B4.09.24.1
Bus info : usb-1c1c000.usb-1
Driver version: 4.14.78
Capabilities : 0x85200001
Video Capture
Read/Write
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x05200001
Video Capture
Read/Write
Streaming
Extended Pix Format
Priority: 2
Video input : 0 (ov534: ok)
Format Video Capture:
Width/Height : 640/480
Pixel Format : 'YUYV'
Field : None
Bytes per Line : 1280
Size Image : 614400
Colorspace : sRGB
Transfer Function : Default
YCbCr/HSV Encoding: Default
Quantization : Default
Flags :
Streaming Parameters Video Capture:
Capabilities : timeperframe
Frames per second: 25.000 (25/1)
Read buffers : 2
User Controls
brightness (int) : min=0 max=255 step=1 default=0 value=0 flags=slider
contrast (int) : min=0 max=255 step=1 default=32 value=32 flags=slider
saturation (int) : min=0 max=255 step=1 default=64 value=64 flags=slider
hue (int) : min=-90 max=90 step=1 default=0 value=0 flags=slider
white_balance_automatic (bool) : default=1 value=1
exposure (int) : min=0 max=255 step=1 default=120 value=253 flags=inactive, volatile
gain_automatic (bool) : default=1 value=1 flags=update
gain (int) : min=0 max=63 step=1 default=20 value=255 flags=inactive, volatile
horizontal_flip (bool) : default=0 value=0
vertical_flip (bool) : default=0 value=0
power_line_frequency (menu) : min=0 max=1 default=0 value=0
sharpness (int) : min=0 max=63 step=1 default=0 value=0 flags=slider
Camera Controls
auto_exposure (menu) : min=0 max=1 default=0 value=0 flags=update
@mpromonet
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mpromonet commented Dec 29, 2018 •
edited
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Hi,
The device video0 seems busy, maybe another process is using it ?
Did you try with -r using the read interface ?
Best regards
Michel

@dony71
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dony71 commented Dec 31, 2018

v4l2compress_h264 -r /dev/video0 /dev/video10 -vvv
2018-12-31 10:30:07,717 [INFO ] - v4l2wrapper/inc/logger.h:44
level:DEBUG
2018-12-31 10:30:07,717 [NOTICE] - src/V4l2Device.cpp:117
driver:ov534 capabilities:85200001 mandatory:1000001
2018-12-31 10:30:07,717 [NOTICE] - src/V4l2Device.cpp:120
/dev/video0 support capture
2018-12-31 10:30:07,717 [NOTICE] - src/V4l2Device.cpp:122
/dev/video0 support read/write
2018-12-31 10:30:07,718 [NOTICE] - src/V4l2Device.cpp:123
/dev/video0 support streaming
2018-12-31 10:30:07,718 [NOTICE] - src/V4l2Device.cpp:147
/dev/video0:YUYV size:640x480
2018-12-31 10:30:07,760 [NOTICE] - src/V4l2Device.cpp:229
fps:1/25
2018-12-31 10:30:07,760 [NOTICE] - src/V4l2Device.cpp:230
nbBuffer:2
2018-12-31 10:30:07,760 [NOTICE] - src/V4l2Device.cpp:117
driver:v4l2 loopback capabilities:85208003 mandatory:4000002
2018-12-31 10:30:07,760 [NOTICE] - src/V4l2Device.cpp:119
/dev/video10 support output
2018-12-31 10:30:07,760 [NOTICE] - src/V4l2Device.cpp:120
/dev/video10 support capture
2018-12-31 10:30:07,760 [NOTICE] - src/V4l2Device.cpp:122
/dev/video10 support read/write
2018-12-31 10:30:07,760 [NOTICE] - src/V4l2Device.cpp:123
/dev/video10 support streaming
2018-12-31 10:30:07,760 [NOTICE] - src/V4l2Device.cpp:147
/dev/video10:H264 size:640x480
2018-12-31 10:30:07,760 [NOTICE] - src/V4l2MmapDevice.cpp:71
Device /dev/video10 nb buffer:8
2018-12-31 10:30:07,761 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:0 size:0
mmap: Invalid argument
2018-12-31 10:30:07,761 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:1 size:0
mmap: Invalid argument
2018-12-31 10:30:07,761 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:2 size:0
mmap: Invalid argument
2018-12-31 10:30:07,761 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:3 size:0
mmap: Invalid argument
2018-12-31 10:30:07,761 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:4 size:0
mmap: Invalid argument
2018-12-31 10:30:07,761 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:5 size:0
mmap: Invalid argument
2018-12-31 10:30:07,761 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:6 size:0
mmap: Invalid argument
2018-12-31 10:30:07,761 [INFO ] - src/V4l2MmapDevice.cpp:90
Device /dev/video10 buffer idx:7 size:0
mmap: Invalid argument
VIDIOC_STREAMON: Invalid argument
2018-12-31 10:30:07,762 [NOTICE] - src/v4l2compress_h264.cpp:136
Start Capturing from /dev/video0
2018-12-31 10:30:07,762 [WARN ] - src/v4l2compress_h264.cpp:163
rc_method:1
2018-12-31 10:30:07,762 [WARN ] - src/v4l2compress_h264.cpp:164
i_qp_constant:23
2018-12-31 10:30:07,762 [WARN ] - src/v4l2compress_h264.cpp:165
f_rf_constant:23
x264 [info]: using cpu capabilities: ARMv6 NEON
x264 [info]: profile Constrained Baseline, level 3.0
2018-12-31 10:30:07,827 [NOTICE] - src/v4l2compress_h264.cpp:185
Start Compressing /dev/video0 to /dev/video10
x264 [debug]: frame= 0 QP=20.00 NAL=3 Slice:I Poc:0 I:1200 P:0 SKIP:0 size=10642 bytes
2018-12-31 10:30:07,864 [WARN ] - src/V4l2MmapDevice.cpp:226
Device /dev/video10 buffer truncated available:0 needed:0
2018-12-31 10:30:07,864 [INFO ] - src/v4l2compress_h264.cpp:239
Copied nbnal:4 size:0
2018-12-31 10:30:07,865 [DEBUG ] - src/v4l2compress_h264.cpp:251
dts:0 captureTime:0 convertTime:12 endodeTime:24 writeTime:0
x264 [debug]: frame= 1 QP=13.00 NAL=2 Slice:P Poc:2 I:0 P:40 SKIP:1160 size=2264 bytes
2018-12-31 10:30:07,896 [WARN ] - src/V4l2MmapDevice.cpp:226
Device /dev/video10 buffer truncated available:0 needed:0
2018-12-31 10:30:07,896 [INFO ] - src/v4l2compress_h264.cpp:243
Copied size:0
2018-12-31 10:30:07,896 [DEBUG ] - src/v4l2compress_h264.cpp:251
dts:0 captureTime:0 convertTime:10 endodeTime:20 writeTime:0
x264 [debug]: frame= 2 QP=13.00 NAL=2 Slice:P Poc:4 I:0 P:15 SKIP:1185 size=109 bytes
2018-12-31 10:30:07,923 [WARN ] - src/V4l2MmapDevice.cpp:226
Device /dev/video10 buffer truncated available:0 needed:0
2018-12-31 10:30:07,923 [INFO ] - src/v4l2compress_h264.cpp:243
Copied size:0

@mpromonet
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Hi,
The output buffer size is 0, something is going wrong.
Did you try to use the write interface instead of mmap, adding '-w'.
Best regards
Michel

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@mpromonet @dony71