Arch Linux

porphyry5

Member

Registered: 2014-06-04

Posts: 88

[SOLVED] mplayer -vo fbdev

On arch 08.01
Trying to play movies at the console using

 mplayer -vo fbdev >& mp.log *.avi 

produced audio but no video, and in mp.log

 
Can't open /dev/fb0: Permission denied
Error opening/initializing the selected video_out (-vo) device.

I got the same result with fbdev2.  As my permissions for /dev/fb0 seemed to be OK,

/home/g # ls -l /dev/fb0
crw-rw---- 1 root video 29, 0 Aug 19 09:04 /dev/fb0

I tried explicitly adding my uid at the end of the 'video' group in /etc/group,

video:x:91:g

which failed thus

 
VO: [fbdev] 720x304 => 720x304 BGRA
Can't put VSCREENINFO: Invalid argument
FATAL: Cannot initialize video driver.

Playing it as root produced the same result.
Full mp.log was

MPlayer SVN-r37224 (C) 2000-2014 MPlayer Team
210 audio & 441 video codecs
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing Pirates (Roman Polanski).avi.
libavformat version 55.33.100 (internal)
AVI file format detected.
[aviheader] Video stream found, -vid 0
[aviheader] Audio stream found, -aid 1
[aviheader] Audio stream found, -aid 2
AVI: ODML: Building ODML index (3 superindexchunks).
VIDEO:  [XVID]  720x304  24bpp  23.976 fps  2109.8 kbps (257.5 kbyte/s)
Clip info:
 Software: VirtualDubModRus 1.5.10.2 (build 2540/release)
 Title: Ïèðàòû / Pirates (1986)
 Artist: SENATOR (BDRip 720)
 Copyright: HQ-ViDEO (www.hq-video.ru)
 Comments: 14.04.2009
Load subtitles in ./
Can't open /dev/fb0: Permission denied
Error opening/initializing the selected video_out (-vo) device.
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
libavcodec version 55.52.102 (internal)
AUDIO: 48000 Hz, 2 ch, floatle, 224.0 kbit/7.29% (ratio: 28000->384000)
Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3)
==========================================================================
[AO OSS] audio_setup: Can't open audio device /dev/dsp: No such file or directory
AO: [alsa] 48000Hz 2ch floatle (4 bytes per sample)
Video: no video
Starting playback...
A:   0.0 (00.0) of 90954.0 (25:15:54.0) ??,?% [J
A:   0.0 (00.0) of 90954.0 (25:15:54.0) ??,?% [J
A:   0.1 (00.0) of 90954.0 (25:15:54.0) ??,?% [J
A:   0.1 (00.0) of 90954.0 (25:15:54.0) ??,?% [J
A:   0.1 (00.0) of 90954.0 (25:15:54.0) ??,?% [J
A:   0.1 (00.1) of 90954.0 (25:15:54.0) ??,?% [J
A:   0.2 (00.1) of 90954.0 (25:15:54.0) ??,?% [J
A:   0.2 (00.1) of 90954.0 (25:15:54.0) ??,?% [J
A:   0.2 (00.2) of 90954.0 (25:15:54.0)  0.3% [J
A:   0.2 (00.2) of 90954.0 (25:15:54.0)  0.3% [J
A:   0.3 (00.2) of 90954.0 (25:15:54.0)  0.3% [J
A:   0.3 (00.2) of 90954.0 (25:15:54.0)  0.3% [J
A:   0.3 (00.2) of 90954.0 (25:15:54.0)  0.3%

Last edited by porphyry5 (2014-09-28 17:58:21)

teckk

Member

Registered: 2013-02-21

Posts: 519

Re: [SOLVED] mplayer -vo fbdev

You will have to size the video. Example:

mplayer -vo fbdev2 -vf scale=640:480 YourFile.mp4

porphyry5

Member

Registered: 2014-06-04

Posts: 88

Re: [SOLVED] mplayer -vo fbdev

You will have to size the video. Example:

mplayer -vo fbdev2 -vf scale=640:480 YourFile.mp4

Thank you for your help, but I have also tried the scale option, both as scale=1366:768 and scale=1366:-3, which produced the same result as without scaling.  As you can readily see, the essential problem is that mplayer is being refused access to /dev/fb0.  Here is mp.log when using

mplayer -vo fbdev -vf scale 640:480 *.avi >& mp.log
MPlayer SVN-r37224 (C) 2000-2014 MPlayer Team
210 audio & 441 video codecs
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing Rashomon.avi.
libavformat version 55.33.100 (internal)
AVI file format detected.
[aviheader] Video stream found, -vid 0
[aviheader] Audio stream found, -aid 1
VIDEO:  [DIVX]  576x432  24bpp  23.976 fps  1002.8 kbps (122.4 kbyte/s)
Clip info:
 Software: Nandub v1.0rc2
 Title: Rashomon
 Subject: Rashomon
 Artist: Directed by Akira Kurosawa
 Copyright: Offered by LabMonkey©
 Comments: 
Load subtitles in ./
Can't open /dev/fb0: Permission denied
Error opening/initializing the selected video_out (-vo) device.
==========================================================================
Opening audio decoder: [mpg123] MPEG 1.0/2.0/2.5 layers I, II, III
AUDIO: 44100 Hz, 2 ch, s16le, 32.0 kbit/2.27% (ratio: 4000->176400)
Selected audio codec: [mpg123] afm: mpg123 (MPEG 1.0/2.0/2.5 layers I, II, III)
==========================================================================
[AO OSS] audio_setup: Can't open audio device /dev/dsp: No such file or directory
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A:   0.1 (00.0) of 182358.1 (50:39:18.1) ??,?% [J
A:   0.1 (00.0) of 182358.1 (50:39:18.1) ??,?% [J
A:   0.1 (00.1) of 182358.1 (50:39:18.1) ??,?% [J
A:   0.1 (00.1) of 182358.1 (50:39:18.1) ??,?% [J
A:   0.1 (00.1) of 182358.1 (50:39:18.1) ??,?% [J
A:   0.2 (00.1) of 182358.1 (50:39:18.1) ??,?% [J
A:   0.2 (00.1) of 182358.1 (50:39:18.1) ??,?% [J
A:   0.2 (00.2) of 182358.1 (50:39:18.1) ??,?% [J

Last edited by porphyry5 (2014-08-23 16:06:15)

emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: [SOLVED] mplayer -vo fbdev

And "sg video -c "mplayer test.avi "' works?

porphyry5

Member

Registered: 2014-06-04

Posts: 88

Re: [SOLVED] mplayer -vo fbdev

And "sg video -c "mplayer test.avi "' works?

No, it did this

sg video -c "mplayer Rashomon.avi"
Password:
sg: failed to crypt password with previous salt: Invalid argument
~/Films/Rashomon $ sg video -c "mplayer Rashomon.avi"
Password:
sg: failed to crypt password with previous salt: Invalid argument
~/Films/Rashomon $ 

The only password on this machine is for 'root'.  The two attempts are with no password and with root's password.

teckk

Member

Registered: 2013-02-21

Posts: 519

Re: [SOLVED] mplayer -vo fbdev

For me this works

mplayer -vo fbdev2 -vf scale=640:480 1.mp4

What you posted with your syntax does not.

mplayer -vo fbdev -vf scale 640:480 YourFile.avi

If I use your syntax I get.

mplayer -vo fbdev -vf scale 640:480 1.mp4 >& mp.log
........
[AO OSS] audio_setup: Can't open audio device /dev/dsp: No such file or directory
AO: [alsa] 48000Hz 2ch floatle (4 bytes per sample)
Starting playback...
Movie-Aspect is undefined - no prescaling applied.
[swscaler @ 0x7f17ca4e4ec0]using unscaled yuv420p -> bgra special converter
VO: [fbdev] 638x360 => 638x360 BGRA 
Can't put VSCREENINFO: Invalid argument

In fact I can't get -vo fbdev to function at all.

Can't open /dev/fb0: Permission denied

Device nodes are not accessible to user. If I specify the node as user it fails

mplayer -vo fbdev2 /dev/fb0 -vf scale=640:480 1.mp4 >& mp.log

However if I specify node as root it plays ok.

su
Password: 
# mplayer -vo fbdev2 /dev/fb0 -vf scale=640:480 1.mp4 >& mp.log

I have

 ls -l /dev/fb0
crw-rw---- 1 root video 29, 0 Aug 19 08:23 /dev/fb0

I can also play a video with

sg users -c "mplayer -vo fbdev2 -vf scale 640:480 1.mp4"

Don't know what you have wrong, trying to give you some info to go on.

Xabre

Member

From: Serbia

Registered: 2009-03-19

Posts: 750

Re: [SOLVED] mplayer -vo fbdev

Adding user to video group will fix that.

porphyry5

Member

Registered: 2014-06-04

Posts: 88

Re: [SOLVED] mplayer -vo fbdev

su
Password: 
# mplayer -vo fbdev2 /dev/fb0 -vf scale=640:480 1.mp4 >& mp.log

Don't know what you have wrong, trying to give you some info to go on.

I get consistently the same response from both fbdev and fbdev2, as previously reported.
Running it as root as you have above produces

/home/g/Films/Repentance1984 # mplayer -vo fbdev2 /dev/fb0 -vf scale=640:480 *.avi
...
Playing /dev/fb0.
File not found: '/dev/fb0'
Failed to open /dev/fb0. 

and thereafter it proceeds as usual.

Persisting with the theory that their is something wrong with the permissions,
in /etc/udev/rules.d/10-local.rules I added

KERNEL=="fb[0-9]*", NAME="fb/%n", SYMLINK+="%k", GROUP="video"

And now I get exactly the same response under all conditions, root or user, fbdev or fbdev2,
specifying /dev/fb0 or not I get

Can't open /dev/fb0: No such file or directory
Error opening/initializing the selected video_out (-vo) device. 

And, by the way, as far as I can read dmesg, fb0 does exist

[    2.677271] Console: switching to colour frame buffer device 170x48
[    2.682930] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device

But according to ls

/home/g/Films/Repentance1984 # ls -l /dev/fb0
ls: cannot access /dev/fb0: No such file or directory 

I assume this results from adding that udev rule, as prior to that I had /dev/fb0.  I'll remove the udev rule and check.
No such luck, /dev/fb0 was not restored, and I seem to be digging myself deeper into this hole.  At this point I think a fresh install of arch is the easiest route to take and will do so.  Thank you all for your help.

Last edited by porphyry5 (2014-08-26 20:39:49)

porphyry5

Member

Registered: 2014-06-04

Posts: 88

Re: [SOLVED] mplayer -vo fbdev

OK I have the issue cleared up.  As teckk advised one must be logged in as root and use fbdev2, e.g

 mplayer -vo fbdev2 -vf scale=1366:768 film.avi 

But there are further complications:
1) On my system at least arch, 09/04, it will only work on tty1.  Why this should be, I have no idea.
2) Every 10 minutes or so the screen would go blank, requiring a keystroke to restore the picture.  This can be avoided by running the command

 # setterm --blank 0 

before running the movie.  Interestingly, this setterm command also will only run on tty1, on others it is rejected.  According to the manual the --blank option only applies on virtual terminals. 

Again, many thanks to all who responded to this thread.