Getting the frame from movie in material [SOLVED]

Helper

On 31/07/2015 at 08:14, xxxxxxxx wrote:

I have a material with a movie loaded in the Color channel. When I apply the material to an object and set the Editor->Animate Preview option on, scrubbing the timeline, I see the movie playing in the object surface.
However, when I try to get the bitmap from the material, using this python code, it always gets me the first frame, no matter where I have the play-head:

  
import c4d   
#Welcome to the world of Python   
  
def main() :   
    mat=op[c4d.ID_USERDATA,1]   
    # is there anything in the Link user data?   
    if mat==None: return   
       
    # is it a Material?   
    if mat.GetType()!=5703: return   
       
    color_ch=mat[c4d.MATERIAL_USE_COLOR]   
    # is the Color channel turned on?   
    if color_ch==0: return   
       
    texture=mat[c4d.MATERIAL_COLOR_SHADER]   
    # is there anything in the Texture slot?   
    if texture==None: return   
       
    # is it a bitmap/movie?   
    if texture.GetType()!=5833: return   
       
    # render the bitmap to the Picture Viewer   
    irs = c4d.modules.render.InitRenderStruct()   
    if texture.InitRender(irs)==c4d.INITRENDERRESULT_OK:   
        bitmap = texture.GetBitmap()   
        texture.FreeRender()   
        if bitmap is not None:   
            c4d.bitmaps.ShowBitmap(bitmap)

Yes, I do get a "RuntimeError: illegal operation, invalid cross-thread call" error in the last line of code but, even so, I get an image in the Picture Viewer and it is ALWAYS the first frame of the movie.

How can I get the correctly calculated frame, according to the parameters set in the Animation tab inside the material channel?

Helper

On 31/07/2015 at 15:52, xxxxxxxx wrote:

I managed to find a way to make it work...

filename=texture[c4d.BITMAPSHADER_FILENAME]

    fps=doc.GetFps()

    t_min=doc.GetMinTime().GetFrame(fps)
    t_max=doc.GetMaxTime().GetFrame(fps)
    curr_time=doc.GetTime().GetFrame(fps)

    ml=c4d.bitmaps.MovieLoader()
    movie=ml.Open(filename)
    framecount, ml_fps = ml.GetInfo()

    new_frame=c4d.utils.RangeMap(curr_time,t_min,t_max,0,framecount,False)

    result,image=ml.Read(int(new_frame))

    if result==c4d.IMAGERESULT_OK:
        c4d.bitmaps.ShowBitmap(image)

But it only works with movies. For image sequences, it doesn't. Must I do it by hand?

Helper

On 03/08/2015 at 02:42, xxxxxxxx wrote:

Hi Rui,

you might set the right frame with: Shader[c4d.BITMAPSHADER_TIMING_FROM] etc.
Please have a look at this thread:

Grabbing bitmap data off a shader

Hope this helps?
Best wishes
Martin

Helper

On 03/08/2015 at 04:52, xxxxxxxx wrote:

Thank you. I did found that thread.
But I will have to calculate the frame by myself, right?
I was expecting that, once we had a material with a movie or image sequence loaded in the Color channel and we had all the parameters of the animation set (by pressing Calculate for an image sequence, for example), there was a way to get the calculated frame automatically.

Helper

On 03/08/2015 at 05:28, xxxxxxxx wrote:

Actually I´m not aware of any other way to get the corresponding image than calculating it by yourself.

Helper

On 03/08/2015 at 05:44, xxxxxxxx wrote:

I understand that now. I just assumed that, since it happens automatically when when the editor animation preview is turned on, it would be something that could be accessed in code.

Helper

On 04/08/2015 at 05:39, xxxxxxxx wrote:

Hi Rui,

just want to confirm, there's no such functionality available. As Martin said, you will need to do it yourself. Sorry.