我正在尝试制作创意直播！在Raspberry Pi 3 B +上运行的运动摄像头。 fswebcam和motion均给出错误“无法找到兼容的调色板格式”。另一方面，ffmpeg可以轻松地从网络摄像头捕获视频。
$ lsusb
Bus 001 Device 004: ID 041e:4041 Creative Technology, Ltd Webcam Live! Motion`
$ v4l2-ctl --all
Driver Info (not using libv4l2):
Driver name : sq930x
Card type : Creative WebCam Live! Motion
Bus info : usb-3f980000.usb-1.2
Driver version: 4.14.34
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 (sq930x: ok)
Format Video Capture:
Width/Height : 640/480
Pixel Format : 'RGGB'
Field : None
Bytes per Line : 640
Size Image : 307200
Colorspace : sRGB
Transfer Function : Default
YCbCr/HSV Encoding: Default
Quantization : Default
Flags :
Streaming Parameters Video Capture:
Frames per second: invalid (0/0)
Read buffers : 2
User Controls
exposure (int) : min=1 max=4095 step=1 default=854 value=854
gain (int) : min=1 max=255 step=1 default=141 value=141
motion打开设备失败的日志：$ cat /var/log/motion/motion.log
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] motion_startup: Using log type (ALL) log level (NTC)
[0:motion] [NTC] [ENC] [Jun 24 16:16:42] ffmpeg_init: ffmpeg libavcodec version 57.48.101 libavformat version 57.41.100
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Motion running in setup mode.
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Camera 0 is from /etc/motion/motion.conf
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Camera 0 is device: /dev/video0 input -1
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Stream port 8081
[0:motion] [NTC] [ALL] [Jun 24 16:16:42] main: Waiting for threads to finish, pid: 12067
[0:web_control] [NTC] [STR] [Jun 24 16:16:42] http_bindsock: listening on 127.0.0.1 port 8080
[1:ml1] [NTC] [ALL] [Jun 24 16:16:42] motion_init: Camera 0 started: motion detection Enabled
[0:web_control] [NTC] [STR] [Jun 24 16:16:42] httpd_run: Started motion-httpd server on port 8080 (auth Disabled)
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] vid_v4lx_start: Using videodevice /dev/video0 and input -1
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability:
------------------------
cap.driver: "sq930x"
cap.card: "Creative WebCam Live! Motion"
cap.bus_info: "usb-3f980000.usb-1.2"
cap.capabilities=0x85200001
------------------------
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - VIDEO_CAPTURE
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - READWRITE
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_get_capability: - STREAMING
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_select_input: name = "sq930x", type 0x00000002, status 00000000
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_select_input: - CAMERA
[1:ml1] [WRN] [VID] [Jun 24 16:16:42] v4l2_select_input: Device doesn't support VIDIOC_G_STD
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Config palette index 17 (YU12) doesn't work.
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Supported palettes:
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: (0) RGGB (8-bit Bayer RGRG/GBGB)
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: 0 - 8-bit Bayer RGRG/GBGB (compressed : 0) (0x42474752)
[1:ml1] [ERR] [VID] [Jun 24 16:16:42] v4l2_set_pix_format: Unable to find a compatible palette format.
[1:ml1] [NTC] [VID] [Jun 24 16:16:42] vid_v4lx_start: Using V4L1
[1:ml1] [NTC] [ALL] [Jun 24 16:16:42] image_ring_resize: Resizing pre_capture buffer to 1 items
[1:ml1] [ERR] [ALL] [Jun 24 16:16:52] motion_init: Error capturing first image
[1:ml1] [NTC] [STR] [Jun 24 16:16:52] http_bindsock: listening on 127.0.0.1 port 8081
[1:ml1] [NTC] [ALL] [Jun 24 16:16:52] motion_init: Started motion-stream server on port 8081 (auth Disabled)
[1:ml1] [ERR] [ALL] [Jun 24 16:16:52] motion_loop: Video device fatal error - Closing video device
[1:ml1] [NTC] [VID] [Jun 24 16:16:52] vid_close: Closing video device /dev/video0
ffmpeg录制成功：$ ffmpeg -i /dev/video0 test.mp4
ffmpeg version 3.2.10-1~deb9u1+rpt1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1) 20170516
configuration: --prefix=/usr --extra-version='1~deb9u1+rpt1' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
[video4linux2,v4l2 @ 0x16035c0] Time per frame unknown
Input #0, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 2523.746120, bitrate: N/A
Stream #0:0: Video: rawvideo ([186]RG[8] / 0x84752BA), bayer_rggb8, 640x480, 25.42 tbr, 1000k tbn, 1000k tbc