| View previous topic :: View next topic |
| Author |
Message |
Efo
Guru
Joined: 23 Jun 2005
Posts: 498
|
 Posted: Tue Jan 15, 2013 5:59 am Post subject: webcam video is noisy [SOLVED] |
 |
|
Hi all,
I have a laptop with a "BisonCam, NB Pro", which used to work fine with:
mplayer tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0:fps=30:outfmt=mjpg -vo gl2
I am not sure during which update this happened, but now when I run the command above the picture is extremely noisy. I double checked my kernel with http://en.gentoo-wiki.com/wiki/Webcam#Webcam_driver and it seems correct. I am not sure whether it is the driver or something else that needs to be checked/unchecked in the kernel.
mplayer plays regular videos just fine.
Any help is appreciated.
Efo
Last edited by Efo on Sun Jan 20, 2013 6:32 pm; edited 1 time in total |
|
| Back to top |
|
 |
syn0ptik
Apprentice
Joined: 09 Jan 2013
Posts: 267
|
| Posted: Tue Jan 15, 2013 10:50 pm Post subject: |
|
|
lets try
|
|
| Back to top |
|
|
Efo
Guru
Joined: 23 Jun 2005
Posts: 498
|
| Posted: Wed Jan 16, 2013 4:31 am Post subject: |
|
|
Hi syn0ptik,
thanks for helping. -vo x11 didnt work; still a lot of noise.
With the following line
| Code: |
mplayer tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0:fps=30:outfmt=yv12 -vo x11
|
I get
| Code: |
MPlayer 1.1-4.5.4 (C) 2000-2012 MPlayer Team
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: BisonCam, NB Pro
Capabilities: video capture streaming
supported norms:
inputs: 0 = Camera 1;
Current input: 0
Current format: MJPEG
v4l2: ioctl set format failed: Invalid argument
tv.c: norm_from_string(pal): Bogus norm parameter, setting default.
v4l2: ioctl enum norm failed: Invalid argument
Error: Cannot set norm!
Selected input hasn't got a tuner!
v4l2: ioctl set mute failed: Invalid argument
v4l2: select timeout
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 53.61.100 (external)
Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG)
==========================================================================
Audio: no sound
Starting playback...
v4l2: select timeout
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
[swscaler @ 0x7f8338bfd100]using unscaled yuv422p -> bgra special converter
VO: [x11] 640x480 => 640x480 BGRA
[mjpeg @ 0x7f83382cbf60]overread 8
[mjpeg @ 0x7f83382cbf60]overread 8
V: 0.0 4/ 4 ??% ??% ??,?% 0 0
[mjpeg @ 0x7f83382cbf60]overread 8
...
|
|
|
| Back to top |
|
|
syn0ptik
Apprentice
Joined: 09 Jan 2013
Posts: 267
|
| Posted: Thu Jan 17, 2013 12:40 am Post subject: |
|
|
Why not make it wihtout
or try
on my it take
| Code: |
VO: [x11] 512x288 => 512x288 Planar YV12
[swscaler @ 0xf24420]using unscaled yuv420p -> bgra special converter |
|
|
| Back to top |
|
|
Efo
Guru
Joined: 23 Jun 2005
Posts: 498
|
| Posted: Thu Jan 17, 2013 1:24 am Post subject: |
|
|
Hi syn0ptik,
unfortunately that didnt work. Since it used to work, I think it is more of a kernel/driver problem... |
|
| Back to top |
|
|
syn0ptik
Apprentice
Joined: 09 Jan 2013
Posts: 267
|
| Posted: Sat Jan 19, 2013 4:20 am Post subject: |
|
|
| you may also try mencoder for capturing video in images and post there. |
|
| Back to top |
|
|
Efo
Guru
Joined: 23 Jun 2005
Posts: 498
|
| Posted: Sun Jan 20, 2013 6:32 pm Post subject: |
|
|
Not sue what it is, so I ended up downgrading mplayer from mplayer-1.1-r1 to mplayer-1.0_rc4_p20110322-r1.
Now it is working like before. |
|
| Back to top |
|
|
|
Kernel & Hardware
