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Old 10-05-2004, 09:39 AM   #1
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Registered: Oct 2004
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mplayer: Can't open /dev/fb0: Permission denied

i instaled debian testing, compiled mplayer and tryed to watch some movie:
this is the result:

jojoii@krutihome:~$ mplayer mvn-re2ts01.bin
MPlayer 1.0pre5-3.3.4 (C) 2000-2004 MPlayer Team

CPU: Advanced Micro Devices Athlon MP/XP Thoroughbred 2009 MHz (Family: 6, Stepping: 1)
Detected cache-line size is 64 bytes
CPUflags: MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE

Reading config file /usr/local/etc/mplayer/mplayer.conf: No such file or directory
Reading config file /home/jojoii/.mplayer/config
Reading /home/jojoii/.mplayer/codecs.conf: Can't open '/home/jojoii/.mplayer/codecs.conf': No such file or directory
Reading /usr/local/etc/mplayer/codecs.conf: Can't open '/usr/local/etc/mplayer/codecs.conf': No such file or directory
Using built-in default codecs.conf.
font: can't open file: /home/jojoii/.mplayer/font/font.desc
font: can't open file: /usr/local/share/mplayer/font/font.desc
Failed to open /dev/rtc: Permission denied (it should be readable by the user.)
Using usleep() timing
Can't open input config file /home/jojoii/.mplayer/input.conf: No such file or directory
Can't open input config file /usr/local/etc/mplayer/input.conf: No such file or directory
Falling back on default (hardcoded) input config

Playing mvn-re2ts01.bin.
MPEG-PS file format detected.
VIDEO: MPEG2 480x576 (aspect 2) 25.000 fps 2521.2 kbps (315.2 kbyte/s)
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
MP3lib: init layer2&3 finished, tables done
AUDIO: 44100 Hz, 2 ch, 16 bit (0x10), ratio: 28000->176400 (224.0 kbit)
Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)
Can't open /dev/fb0: Permission denied
[fbdev2] Can't open /dev/fb0: Permission denied
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 480 x 576 (preferred csp: Mpeg PES)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
VDecoder init failed
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.3.1
Selected video codec: [mpeg12] vfm:libmpeg2 (MPEG 1 or 2 (libmpeg2))
Checking audio filter chain for 44100Hz/2ch/16bit -> 44100Hz/2ch/16bit...
AF_pre: af format: 2 bps, 2 ch, 44100 hz, little endian signed int
AF_pre: 44100Hz 2ch Signed 16-bit (Little-Endian)
audio_setup: Can't open audio device /dev/dsp: Permission denied
AO: [null] 44100Hz 2ch Signed 16-bit (Little-Endian) (2 bps)
Building audio filter chain for 44100Hz/2ch/16bit -> 44100Hz/2ch/16bit...
Starting playback...
VDec: vo config request - 480 x 576 (preferred csp: Planar YV12)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
SwScaler: using unscaled Planar YV12 -> BGR 24-bit special converter
VO: [png] 480x576 => 768x576 BGR 24-bit
PNG Warning: compression level set to 0, compression disabled!
PNG Info: Use the -z <n> switch to set compression level from 0 to 9.
PNG Info: (0 = no compression, 1 = fastest, lowest - 9 best, slowest compression)
A: 2.3 V: 1.6 A-V: 0.685 ct: 0.088 23/ 23 6% 161% 1.2% 17 0 0%

MPlayer interrupted by signal 2 in module: decode_video

the movie seem to be runnig, so i thing it`s not the codecs problem, but there is no video output.
i tryed to change /dev/fb0 permissions, but it doesn`t work.

can anybody help me?
Old 09-21-2008, 02:54 PM   #2
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Registered: Dec 2007
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Smile This may help

Well, this is rather a complicated issue. You can find a lot of info on; maybe you already have...
The mplayer documentation generally seems to favour the xv video output option; I don't blame them, it is rather stable. For it to work, xv must be installed *before* compiling mplayer. What I have done (though some of it may be superfluous) is:
- The X11 screen was set using sax2, for 1024x768, 16.7Million colours.
- I set up the frame buffer for 1024x768, 16.7Million colours. This is actually done by altering the boot manager settings (in my case, grub). I used boot option vga=0x318; other options (from the web page mentioned above) are:
# +-------------------------------------------------+
# | 640x480 800x600 1024x768 1280x1024
# ----+--------------------------------------------
# 256 | 0x301=769 0x303=771 0x305=773 0x307=775
# 32K | 0x310=784 0x313=787 0x316=790 0x319=793
# 64K | 0x311=785 0x314=788 0x317=791 0x31A=794
# 16M | 0x312=786 0x315=789 0x318=792 0x31B=795
# +-------------------------------------------------+
- I installed the following packages:
(this was done with Yast2 in Suse Linux 11.0).
- I then compiled / made MPlayer-1.0rc2.
This then worked fine! In principle, one needs to type
mplayer -vo xv [file],
but I have found that mplayer actually finds xv and automatically selects it, at least in my case.
Old 09-21-2008, 05:56 PM   #3
Registered: Jul 2007
Location: Santa Maria, Brazil
Distribution: Arch Linux
Posts: 66

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If you have framebuffer working, try adding yourself to the 'video' group (or whatever the group that /dev/fb0 is in).


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