[[Sota/開発作業履歴]]
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#contents
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*2015/04/07 [#q31629e8]
**V4L2[#w35e55e3]
- とりあえずデバイスからカメラモードを取得。
VIDIOC_QUERYMENUで何故かInvalid argument.
- サンプルを実行するとselect timeoutとなる。解決法を探し中。
- ひょっとしたら、カメラのフレームレートが速すぎて間に合っていない？？
このカメラ、サイズに対してフレームレートが1種類しかないから、遅く出来ない。。
Using camera #0
Camera : /dev/video0
Driver name : uvcvideo
Driver Version : 3.10.17
Device name : HD USB Camera
Bus information : usb-dwc3-host.2-1.2
Capabilities : 84000001h
V4L2_CAP_VIDEO_CAPTURE (Video Capture) : OK
V4L2_CAP_VIDEO_OUTPUT (Video Output) : Not supported.
V4L2_CAP_VIDEO_OVERLAY (Video Overlay) : Not supported.
V4L2_CAP_VBI_CAPTURE (Raw VBI Capture) : Not supported.
V4L2_CAP_VBI_OUTPUT (Raw VBI Output) : Not supported.
V4L2_CAP_SLICED_VBI_CAPTURE (Sliced VBI Capture) : Not supported.
V4L2_CAP_SLICED_VBI_OUTPUT (Sliced VBI Output) : Not supported.
V4L2_CAP_RDS_CAPTURE (Undefined.[to be defined]) : Not supported.
V4L2_CAP_VIDEO_OUTPUT_OVERLAY (Video Output Overlay (OSD)) : Not supported.
V4L2_CAP_TUNER (Tuner) : Not supported.
V4L2_CAP_AUDIO (Audio inputs or outputs) : Not supported.
V4L2_CAP_RADIO (Radio receiver) : Not supported.
V4L2_CAP_READWRITE (Read/write() I/O method) : Not supported.
V4L2_CAP_ASYNCIO (Asynchronous I/O method) : Not supported.
V4L2_CAP_STREAMING (Streaming I/O method) : OK
Image format #0 : MJPG (MJPEG)
0: (640 x 480) 1/30
1: (320 x 240) 1/30
2: (800 x 600) 1/30
3: (1024 x 768) 1/30
4: (1280 x 720) 1/30
5: (1280 x 1024) 1/30
6: (1600 x 1200) 1/15
7: (1920 x 1080) 1/15
8: (2048 x 1536) 1/15
9: (2592 x 1944) 1/15
10: (640 x 480) 1/30
Image format #1 : YUYV (YUV 4:2:2 (YUYV))
0: (640 x 480) 1/30
1: (320 x 240) 1/30
2: (800 x 600) 1/30
3: (1024 x 768) 1/15
4: (1280 x 720) 2/15
5: (1280 x 1024) 2/15
6: (1600 x 1200) 1/3
7: (1920 x 1080) 1/3
8: (2048 x 1536) 1/3
9: (2592 x 1944) 1/3
10: (640 x 480) 1/30
