網路攝像頭 - xawtv & mplayer

伙計們，

我遇到了一個奇怪的問題。我在 thinkpad t430 上執行 Debian stretch。當我嘗試使用我的集成網路攝像頭捕捉影片時，我可以觀看流媒體影片，如果我

xawtv -c /dev/video0

而不是當我發佈時，

mplayer tv://

我得到的錯誤是，

--> 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 <olschewski@zpr.uni-koeln.de>
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'.]

誰能解釋一下為什麼 mplayer 因上述錯誤而崩潰，而 xawtv 能夠顯示？

任何調試和解決問題的幫助將不勝感激。

我已經安裝並執行了**影片 4 linux 2 (v4l2)**預設核心帶有 debian 拉伸並通過更新到最新apt

我的v4l2-ctl --list-devices說：

Integrated Camera (usb-0000:00:1a.0-1.6):
/dev/video0

啊！

這個問題已經消失了

primusrun mplayer tv://

據我了解，mplayer 必須需要在我的筆記型電腦上安裝 NVIDIA 卡，以及集成的英特爾顯卡。我現在的問題是讓它與 opencv 一起工作！

無論如何，感謝那些關注並努力解決/嘗試幫助我的人。

引用自：https://unix.stackexchange.com/questions/411617