Movie Sprites

[PyTom]

That's off-topic for this thread, which is about Movie sprites. It isn't clear what your first example even means, and the second has nothing to do with a Movie sprite.

[ketskari]

I took an animation I'd made in Blender, then converted to webM to try it out. After a few seconds it crashed on me, but omg still really looking forward to this feature. It looks great!

(Also, in the latest nightly, defined im.composites sometimes seem to revert to the default placeholder images).

[PyTom]

Can you send it to me?

[curry nochi rice]

So I'm wondering if we can generate sequences that can be looped in which the sprite constantly moves just a little bit—just a little bit of sway or shifting of their weight, etc.

Yes, things will loop by default. Obviously, you'd have to loop the animation proper - Ren'Py should just seamlessly play frames.

Hi PyTom, I'm wondering how you create sequences of movie sprites in code... e.g. "[heavy_breathing, normal_breathing]". Also, how to disable the auto-loop behavior since I wouldn't want the sprite to heavy_breathing again.

Or should I just wait for the documentation to appear? Hahaha. Sorry, I'm just too excited for this.

[xela]

Thanks to renoa-heartily for the animated gif I converted, which can be found in this thread: http://lemmasoft.renai.us/forums/viewto ... 79#p364740

A question if I may:

How did you create the mask movie of that .gif (changed white background to black and all other colors to white)? What software was used or even how to phrase such a question properly for google would be of a great help, cause I cannot figure even that out.

[nyaatrap]

Using ffmpeg, I tested this code and works

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ffmpeg -i image.gif -filter:v alphaextract mask.webm

To make a mask from png sequence (0000.png-) is

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ffmpeg -r 24 -i %4d.png -filter:v alphaextract mask.webm

[xela]

Using ffmpeg, I tested this code and works

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ffmpeg -i image.gif -filter:v alphaextract mask.webm

To make a mask from png sequence (0000.png-) is

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ffmpeg -r 24 -i %4d.png -filter:v alphaextract mask.webm

Domo arigato! I'll try this tonight.

[nyaatrap]

I think ffmpeg should be documented somewhere. I couldn't find other free applications that can make a mask video file. (except commercial applications like Adobe AE)

[xela]

There are some examples on stack overflow (now I know that ffmpeg can be used for this, searching is easier). You command line works perfectly btw, many thanks (again).

[nyaatrap]

Oh, I mean somewhere in ren'py official document, at least mention that ffmpeg is suited. I think It's rare who knows about videos in ren'py user. Most users have no clue where to find, then spend many time on random googling (that's what I did).

[curry nochi rice]

Okay, was testing with exporting L2D animation to .mov >convert to .avi > integrate to RenPy and it didn't work out as plan. It seems exporting to .gif then converting to .webm is the only viable option for now? Gonna try .mov to .webm and see what will happen (or all the damn combinations I can think of). Will update.

Basically, it's still export to .gif > convert to .webm > get alphamask from .gif

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#give epsilon-idle.gif, in ffmpeg that would be 
ffmpeg -i epsilon-idle.gif -c:v libvpx -crf 4 -b:v 500K epsilon-idle.gif
ffmpeg -i epsilon-idle.gif -filter:v alphaextract epsilon-idle-mask.webm

[nyaatrap]

I think png is the best. Gif loses its quality many, mov also loses a bit. That's why I wrote how to make a video from png by ffmpeg.

[curry nochi rice]

I think png is the best. Gif loses its quality many, mov also loses a bit. That's why I wrote how to make a video from png by ffmpeg.

Oh, sequential order. Do I need to do that like one by one or just that one line?

[nyaatrap]

-r 24 -i %4d.png will read 0000.png, 0001.png, 0002.png, .... then combine into one file with 24 framerate. You have to run ffmpeg two times for one motion: from pngs to real.webm, from pngs to mask.webm.

[curry nochi rice]

-r 24 -i %4d.png will read 0000.png, 0001.png, 0002.png, .... then combine into one file with 24 framerate. You have to run ffmpeg two times for one motion: from pngs to real.webm, from pngs to mask.webm.

Why 24 though?

ffmpeg has a default 25 fps setting to it. Anyway, the result of this afternoon's test after Nyaatrap's reply. Please forgive the dialogue, I was pretty much raging while doing this.

Edit:
I wrote a tutorial about it, check it here.