The multi-thread cache service is activated only on multi-core processors.
It consists in loading, decoding and caching the video frames in a
separate thread. The cache size is 5 decoded frames and 30 raw frames.
Note that the opening of video file/stream/camera is not multi-thread:
you will still experience a delay at the VideoFFmpeg object creation.
Processing of the video frame (resize, loading to texture) is still done
in the main thread. Caching is automatically enabled for video file,
video streaming and video camera.
Video streaming now works correctly: the videos frames are loaded
at the correct rate. Network delays and frequency drifts are automatically
compensated.
Note: an http video source is always treated as a streaming source,
even though the http protocol allows seeking. For the user it means that
he cannot define start/stop range and cannot restart the video except
by reopening the source. Pause/play is however possible.
Video camera is now correctly handled on Linux: it will not slow down the BGE.
A video camera is treated as a streaming source.
The FFmpeg library allows to load image files. Although it is possible
to load images using the VideoFFmpeg class, it is not very efficient.
The new class VideoTexture.ImageFFmpeg is dedicated to image management.
Constructor:
-----------
VideoTexture.ImageFFmpeg('image_file_name')
Opens the file but does not load the texture yet.
The file name can also be a network address. It can also be a video
file name; in that case only the first image is loaded.
Methods:
-------
refresh(True)
Loads the image to texture.
You just need to call it once, the file is automatically closed after
that and calling refresh() again will have no effect.
reload('new_file_name')
Reloads the image (if new_file_name is omitted) or loads a new image.
The file is opened but the texture is not updated yet, you need
to call refresh() once to load the texture.
Attributes:
----------
status
returns the image status:
2 : file opened, texture not loaded
3 : file closed, texture loaded
image
returns the image data as a string of RGBA pixel
size
returns the image size [x,y]
scale
get/set the scale flag.
If the scale flag is False, the image is rescale to texture format
using gluScaleImage() function, slow but good quality.
If the scale flag is True, the image is rescaled using a fast but
less accurate algorithm.
flip
get/set Y-flip flag.
Set to True by default as FFmpeg always provides the image upside down
filter
get/set filter(s) on the image.
Example:
The only compilation system that works for sure is the MSVC project files. I've tried my best to
update the other compilation system but I count on the community to check and fix them.
This is Zdeno Miklas video texture plugin ported to trunk.
The original plugin API is maintained (can be found here http://home.scarlet.be/~tsi46445/blender/blendVideoTex.html)
EXCEPT for the following:
The module name is changed to VideoTexture (instead of blendVideoTex).
A new (and only) video source is now available: VideoFFmpeg()
You must pass 1 to 4 arguments when you create it (you can use named arguments):
VideoFFmpeg(file) : play a video file
VideoFFmpeg(file, capture, rate, width, height) : start a live video capture
file:
In the first form, file is a video file name, relative to startup directory.
It can also be a URL, FFmpeg will happily stream a video from a network source.
In the second form, file is empty or is a hint for the format of the video capture.
In Windows, file is ignored and should be empty or not specified.
In Linux, ffmpeg supports two types of device: VideoForLinux and DV1394.
The user specifies the type of device with the file parameter:
[<device_type>][:<standard>]
<device_type> : 'v4l' for VideoForLinux, 'dv1394' for DV1394; default to 'v4l'
<standard> : 'pal', 'secam' or 'ntsc', default to 'ntsc'
The driver name is constructed automatically from the device types:
v4l : /dev/video<capture>
dv1394: /dev/dv1394/<capture>
If you have different driver name, you can specify the driver name explicitely
instead of device type. Examples of valid file parameter:
/dev/v4l/video0:pal
/dev/ieee1394/1:ntsc
dv1394:ntsc
v4l:pal
:secam
capture:
Defines the index number of the capture source, starting from 0. The first capture device is always 0.
The VideoTexutre modules knows that you want to start a live video capture when you set this parameter to a number >= 0. Setting this parameter < 0 indicates a video file playback. Default value is -1.
rate:
the capture frame rate, by default 25 frames/sec
width:
height:
Width and height of the video capture in pixel, default value 0.
In Windows you must specify these values and they must fit with the capture device capability.
For example, if you have a webcam that can capture at 160x120, 320x240 or 640x480,
you must specify one of these couple of values or the opening of the video source will fail.
In Linux, default values are provided by the VideoForLinux driver if you don't specify width and height.
Simple example
**************
1. Texture definition script:
import VideoTexture
contr = GameLogic.getCurrentController()
obj = contr.getOwner()
if not hasattr(GameLogic, 'video'):
matID = VideoTexture.materialID(obj, 'MAVideoMat')
GameLogic.video = VideoTexture.Texture(obj, matID)
GameLogic.vidSrc = VideoTexture.VideoFFmpeg('trailer_400p.ogg')
# Streaming is also possible:
#GameLogic.vidSrc = VideoTexture.VideoFFmpeg('http://10.32.1.10/trailer_400p.ogg')
GameLogic.vidSrc.repeat = -1
# If the video dimensions are not a power of 2, scaling must be done before
# sending the texture to the GPU. This is done by default with gluScaleImage()
# but you can also use a faster, but less precise, scaling by setting scale
# to True. Best approach is to convert the video offline and set the dimensions right.
GameLogic.vidSrc.scale = True
# FFmpeg always delivers the video image upside down, so flipping is enabled automatically
#GameLogic.vidSrc.flip = True
if contr.getSensors()[0].isPositive():
GameLogic.video.source = GameLogic.vidSrc
GameLogic.vidSrc.play()
2. Texture refresh script:
obj = GameLogic.getCurrentController().getOwner()
if hasattr(GameLogic, 'video') != 0:
GameLogic.video.refresh(True)
You can download this demo here:
http://home.scarlet.be/~tsi46445/blender/VideoTextureDemo.blendhttp://home.scarlet.be/~tsi46445/blender/trailer_400p.ogg
