[MPlayer-users] What does it mean "Could not find matching colorspace"??

[boku]

Hi, all,
   I used the following command to play H264 format sequence:
./mplayer -vo fbdev  -nosound -fps 24 car_1280x720.264
The reason I asked is the video output is so slow. But I checked the
decode time.
It seems not being caused by vdec. I wonder if it's the output/scaling
process makes it slow. Thanks~

And the output is as follows:
----
MPlayer 1.0rc2-4.1.1 (C) 2000-2007 MPlayer Team
CPU: ARM

Playing vwang/demo_clips/car_1280x720.264.
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
Audio: no sound
FPS forced to be 24.000  (ftime: 0.042).
Starting playback...
VDec: vo config request - 1280 x 720 (preferred colorspace: Packed UYVY)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
VDec: using Packed UYVY as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
VO Config (1280x720->1280x720,flags=0,'MPlayer',0x59565955)
SwScaler: reducing / aligning filtersize 1 -> 1
SwScaler: reducing / aligning filtersize 1 -> 1
SwScaler: reducing / aligning filtersize 1 -> 1
SwScaler: reducing / aligning filtersize 1 -> 1
[swscaler @ 0x868be4]SwScaler: BICUBIC scaler, from uyvy422 to dithered bgr565 u
[swscaler @ 0x868be4]SwScaler: using C scaler for horizontal scaling
[swscaler @ 0x868be4]SwScaler: using n-tap C scaler for vertical scaling (BGR)
[swscaler @ 0x868be4]SwScaler: using C YV12->BGR16 Converter
[swscaler @ 0x868be4]SwScaler: 1280x720 -> 1280x720
VO: [fbdev] 1280x720 => 1280x720 BGR 16-bit
*** [scale] Exporting mp_image_t, 1280x720x16bpp YUV packed, 1843200 bytes
(imgfmt: 59565955, planes: (nil),(nil),(nil) strides: 0,0,0, chroma: 0x0, shift:
CHKSUM>> baa468cf-b824b91a-0b4c84d2-26ee1feb-7dabdecc-260deeb4-f973056a-3d463d34
*** [vo] Allocating mp_image_t, 1280x720x16bpp BGR packed, 1843200 bytes
(imgfmt: 42475210, planes: 0x42c88040,(nil),(nil) strides: 2560,0,0, chroma: 0x0