2009-05-28 12:20:14 VLC problem

Samuel Ayet (SPAIN)

Message: 74713

Hi all.

I'm using VLC to play a video stream (by UDP) (in a BF537 STAMP with ADV7393 Daughter Board Card) sended by other Blackfin. The problem is that I can't reproduce nothing due to an error of VLC. When I try to play the stream this is the out of the VLC (CONSOLE IN SERIAL PORT -> ttyBF):

root:/> modprobe bfin_adv7393fb mode=1 mem=1

i2c-bfin-twi i2c-bfin-twi.0: Blackfin BF5xx on-chip I2C TWI Contoller Driver, Version 1.8, regs_base@ffc01400

bfin_adv7393_fb: initializing: PAL 720x576

adv7393.c: starting probe for adapter i2c-bfin-twi(0x190001)

adv7393.c: detecting adv7393 client on address 0x56

fb0: BFIN ADV7393 frame buffer device

fb memory address : 0x03e01000

root:/> ls -l /dev/fb0

crw-rw---- 1 root root 29, 0 Jan 1 05:54 /dev/fb0

root:/> vlc udp://@192.168.1.100:1234

VLC media player 0.8.6b Janus

starting VLC root wrapper... using UID 0 (root)

***************************************

* Running VLC as root is discouraged. *

***************************************

It is potentially dangerous, and might not even work properly.

Remote control interface initialized. Type `help' for help.

status change: ( new input: udp://@192.168.1.100:1234 )

status change: ( audio volume: 256 )

status change: ( play state: 1 )

[00000225] main access error: no network module matched "ipv6"

[00000239] fb video output error: cannot get terminal mode (Invalid argument)

And I got the same error if I try to play any video file.

I have tried to solve the problem reading this topic that seems to be the same error: http://blackfin.uclinux.org/gf/project/uclinux-dist/forum/?action=ForumBrowse&forum_id=39&thread_id=28556&_forum_action=ForumMessageBrowse

Last message sugest use a USB keyboard with the framebuffer console and I'm using the BF537 STAMP board and I don't have any USB daughter card. I don't know what's wrong. Do I need to configure the video output of the VLC? (also I have used the --fbdev /dev/fb0 option in VLC and I got the same error).

Many Thanks!

QuoteReplyEditDelete

2009-05-29 09:37:32 Re: VLC problem

Robin Getz (UNITED STATES)

Message: 74768

Samuel:

What kind of frame buffer device is there? (It isn't enough just to have the /dev/ - there needs to be a backing driver).

-Robin

QuoteReplyEditDelete

2009-05-31 02:26:39 Re: VLC problem

Yi Li (CHINA)

Message: 74830

Samuel,

As the link "http://blackfin.uclinux.org/gf/project/uclinux-dist/forum/?action=ForumBrowse&forum_id=39&thread_id=28556&_forum_action=ForumMessageBrowse" suggested, you can use "mplayer" for video playback. We did not test VLC to play video.

-Yi

QuoteReplyEditDelete

2009-06-01 06:33:48 Re: VLC problem

Samuel Ayet (SPAIN)

Message: 74914

Thank you for your answers. The frame buffer dfevice is the ADV7393. As the topic sugest, I'm trying to use the MPlayer but I have some troubles.

From the video transmitter side I use ffmpeg to capture video from the ADV7183 (note the -qscale 20 to achieve a low quality video and a low bandwidth usage and the 720x288 resolution that is the only one that works correctly):

root:/> ffmpeg -f video4linux -r 10.0 -s 720x288 -i /dev/video0 -qscale 20 -f avi udp:192.168.1.100:1234

Then, from the reciver side I use the MPlayer to play a simple udp stream video but I have an error and Mplayer don't output the video:

root:/> mplayer -fps 10 udp://192.168.1.100:1234

117 audio & 238 video codecs

Playing udp://192.168.1.100:1234.

STREAM_UDP, URL: udp://192.168.1.100:1234

Stream not seekable!

And I don't know why I get the "Stream not seekable!" error because I'm not seeking this stream, just playing it... Do you know how to solve it?

While I was looking for a solution to the "Stream not seekable error" I read some information about the MPlayer and I made a little trick to play the stream video. I dump the stream into a file and at the same time I play the file (just with one second of delay), but I don't like this solution...

QuoteReplyEditDelete

2009-06-03 05:59:35 Re: VLC problem

Samuel Ayet (SPAIN)

Message: 75118

Solved. The Stream not seekable was not an error, just an advice and if you let the Mplayer to do things, it takes about a minute to start playing the udp stream. Just the mplayer was trying to know what demux was better (spending lot of time to do it). If you use the -demuxer mpeg4es (i´m sending mpeg4 avi file by udp stream) option the streams starts in less than 1 second. If someone gets the Stream not seekable! advice just try the -demuxer option.

Samuel

Partner Forums

Partner Libraries

2009-05-28 12:20:14 VLC problem