各位，
我遇到了一个奇怪的问题。我在我的 thinkpad t430 上运行 Debian Stretch。当我尝试使用集成网络摄像头捕获视频时，如果我
xawtv -c /dev/video0
而不是当我发出时，
mplayer tv://
我得到的错误是，
--> mplayer tv://
MPlayer 1.3.0 (Debian), built with gcc-6.2.1 (C) 2000-2016 MPlayer Team
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing tv://.
TV file format detected.
Selected driver: v4l2
name: Video 4 Linux 2 input
author: Martin Olschewski <[email protected]>
comment: first try, more to come ;-)
v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead.
Selected device: Integrated Camera
Capabilities: video capture streaming
supported norms:
inputs: 0 = Camera 1;
Current input: 0
Current format: YUYV
tv.c: norm_from_string(pal): Bogus norm parameter, setting default.
v4l2: ioctl enum norm failed: Inappropriate ioctl for device
Error: Cannot set norm!
Selected input hasn't got a tuner!
v4l2: ioctl set mute failed: Invalid argument
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_39
libva info: va_openDriver() returns 0
==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
Movie-Aspect is undefined - no prescaling applied.
VO: [vdpau] 640x480 => 640x480 Packed YUY2
Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)
==========================================================================
Audio: no sound
Starting playback...
v4l2: select timeout
libvdpau-va-gl: VideoSurface::PutBitsYCbCr_glsl(): not implemented source YCbCr format 'VDP_YCBCR_FORMAT_YUYV'
[vdpau] Error when calling vdp_video_surface_put_bits_y_cb_cr: VDP_STATUS_INVALID_Y_CB_CR_FORMAT
MPlayer interrupted by signal 11 in module: filter_video
- MPlayer crashed by bad usage of CPU/FPU/RAM.
Recompile MPlayer with --enable-debug and make a 'gdb' backtrace and
disassembly. Details in DOCS/HTML/en/bugreports_what.html#bugreports_crash.
[ This binary of MPlayer in Debian is currently compiled with
'--enable-debug'; the debugging symbols are in the package
'mplayer-dbgsym'.]
有人能解释为什么 mplayer 因上述错误而崩溃，而 xawtv 能够显示吗？
任何调试和解决问题的帮助将不胜感激。
我有视频 4 Linux 2 (v4l2)安装并运行默认内核附带 debianstretch 并通过更新到最新版本apt
我的v4l2-ctl --list-devices说：
Integrated Camera (usb-0000:00:1a.0-1.6):
/dev/video0
答案1
啊啊！
这个问题已经消失了
primusrun mplayer tv://
据我了解，mplayer 必须要求在我的笔记本电脑上安装 NVIDIA 卡以及集成英特尔显卡。我现在的问题是让它与 opencv 一起工作！
无论如何，感谢那些关注并努力解决/尝试帮助我的人。