Nano f1c100s 使用网盘中linux固件：Nano_tf_800480.dd，进入系统后执行mplayer /test/fuchouzhe.mp4,屏幕无反应，现象如下：
# mplayer /test/fuchouzhe.mp4
MPlayer 1.3.0-4.8.3 (C) 2000-2016 MPlayer Team
Playing /test/fuchouzhe.mp4.
libavformat version 57.25.100 (internal)
libavformat file format detected.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f2af8]Protocol name not provided, cannot determine if input is local or a network protocol, buffers and access patterns cannot be configured optimally without knowing the protocol
[lavf] stream 0: video (mpeg4), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang und
VIDEO: [MP4V] 800x480 24bpp 18.000 fps 383.7 kbps (46.8 kbyte/s)
Could not find a UTF-8 locale,
character keys beyond Latin-1 will not be handled.
vo: couldn't open the X11 display ()!
VO XOverlay need a subdriver
[VO_SDL] SDL initialization failed: Unable to open mouse.
notice: Can't open /dev/tty: No such device or address
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 57.24.102 (internal)
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
Clip info:
major_brand: isom
minor_version: 1
compatible_brands: isom
creation_time: 2018-06-04 07:27:46
encoder: FormatFactory : www.pcfreetime.com
Load subtitles in /test/
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 22050 Hz, 2 ch, floatle, 64.8 kbit/4.59% (ratio: 8098->176400)
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
AO: [oss] 22050Hz 2ch s16le (2 bytes per sample)
Starting playback...
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]bicubic scaler, from yuv420p to bgra using C
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
[swscaler @ 0xa36cc0]using unscaled yuv420p -> bgra special converter
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from
MPlayer interrupted by signal 2 in module: decode video
Movie-Aspect is 1.67:1 - prescaling to correct movie aspect.
[swscaler @ 0xa36cc0]No accelerated colorspace conversion found from yuv420p to bgra.
VO: [fbdev] 800x480 => 800x480 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.看起来是屏幕的问题，执行echo 123 >/dev/fb0屏幕无反应，只有Log信息和光标显示在LCD上，求助大侠解决思路！
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