Hi People,

im working right now the first time with VideoTextures in Blender.
I have right now a little problem, I know that my webcam is a Video4Linux2 Device - is it possible that it can work with the actual Blender Version?

I saw this post -> http://www.blender.org/forum/viewtopic.php?t=13746&highlight=v4l and I thought - maybe there is already a solution for this? (Because the post is from 2008).


This is the Code that i use - is there something wrong?

Code:

import GameLogic as G import VideoTexture as VT def init_world():    cont = G.getCurrentController()    obj = cont.owner    matID = VT.materialID(obj, 'MAvideo')    G.video = VT.Texture(obj, matID)    S1 = G.expandPath("/dev/video0")    video_source = VT.VideoFFmpeg(S1, 1, 25.0, 320, 240)    video_source.repeat = -1    video_source.scale = True    #video_source.flip = False    #video_source.deinterlace = True    G.video.source = video_source    G.video.source.play()        #sound = cont.actuators["a_sound"]    #cont.activate(sound)    #G.sound = sound def update():    G.video.refresh(True)

Thank you for your help

darkshine wrote:

Hi People, im working right now the first time with VideoTextures in Blender. I have right now a little problem, I know that my webcam is a Video4Linux2 Device - is it possible that it can work with the actual Blender Version? I saw this post -> http://www.blender.org/forum/viewtopic.php?t=13746&highlight=v4l and I thought - maybe there is already a solution for this? (Because the post is from 2008). This is the Code that i use - is there something wrong? Code: import GameLogic as G import VideoTexture as VT def init_world():    cont = G.getCurrentController()    obj = cont.owner    matID = VT.materialID(obj, 'MAvideo')    G.video = VT.Texture(obj, matID)    S1 = G.expandPath("/dev/video0")    video_source = VT.VideoFFmpeg(S1, 1, 25.0, 320, 240)    video_source.repeat = -1    video_source.scale = True    #video_source.flip = False    #video_source.deinterlace = True    G.video.source = video_source    G.video.source.play()        #sound = cont.actuators["a_sound"]    #cont.activate(sound)    #G.sound = sound def update():    G.video.refresh(True) Thank you for your help

Ok I found a solution
I changed in /source/gameengine/VideoTexture.cpp Line: 623

Code:

inputFormat = av_find_input_format("video4linux");

to

Code:

inputFormat = av_find_input_format("video4linux2");

I hope it helps someone

Thanks for this hint Darkshine!

In Blender Version 2.6 this change has to be made in file /source/gameengine/VideoTexture/VideoFFmpeg.cpp Line: 625

Unfortunately it's not working for me on a Mac to access the stream of the iSight camera, but this may have other reasons...

Quote:

S1 = G.expandPath("/dev/video0")

Pardon my ignorance on the subject, but is that the name of the video device under OSX?

stiv wrote:

Pardon my ignorance on the subject, but is that the name of the video device under OSX?

Unfortunately not and it seems none too easy to grab a camera stream on OSX this way (http://stackoverflow.com/questions/6557655/mac-webcam-get-the-device)

I'm trying to use OpenCV now... Or is there anybody who knows another solution?

Maybe I should open a new thread for further questions regarding to video-streams on OSX

[quote="Thillbucci"]

stiv wrote:

I'm trying to use OpenCV now... Or is there anybody who knows another solution? Maybe I should open a new thread for further questions regarding to video-streams on OSX

Just to confirm: FFmpeg does not support video capturing on OSX currently.

Rg,

Arnaud

Just to note I've suggested a patch for BGE to incorporate an extra parameter to set the format. This fixes the hardcoded video4linux problem.

http://projects.blender.org/tracker/index.php?func=detail&aid=30750&group_id=9&atid=127

My suggestion to get OSX capture support is to add a VideoGstreamer module like the VideoFFMpeg. Just not my cup of tea yet as I'm just staryting to get into the source :S

Rg,

Arnaud

Things like this used to be done on the Mac through QuickTime APIs—you had the low-level video-capture “components” that knew about specific hardware, and the higher-level sequence-grabber on top of that, that kind of thing.

Does that not work any more?

sphaero wrote:

Just to note I've suggested a patch for BGE to incorporate an extra parameter to set the format. This fixes the hardcoded video4linux problem. http://projects.blender.org/tracker/index.php?func=detail&aid=30750&group_id=9&atid=127 My suggestion to get OSX capture support is to add a VideoGstreamer module like the VideoFFMpeg. Just not my cup of tea yet as I'm just staryting to get into the source :S Rg, Arnaud

The patch opens some new possibilities. x11grab works with it, which is a cool thing. Unfortunately my easycap dc60 usb capture device still doesnt work in the bge. av_open_input_file fails. The problem is the deprecated api code, which is still used. Who maintains the VideoFFmpeg Code. I've started to add some changes too, but I can test only on Linux.

Yes and Gstreamer would be awesome