Best way to animate .jpg sequence?

Android Processing

wi11turner

Best way to animate .jpg sequence?

in Android Processing • 1 year ago

Hi All,

I have a load of .jpg files I want to play back (in sequence at a certain fps) on a android devise.

What is the best way to animate these? (there are approx 200 files/frames that are on my PC)

Is the best way to produce a .gif? (If so, how is this done? searching this matter brings up a lot of rubbish, i was wondering what the best method is?)

I'm aware I can code these all in individually but I don't fancy that kerfuffle :)

I produced this animation in 'Pencil.'

Thanks for your time.

Replies(7)

amnon.owed

Re: Best way to animate .jpg sequence?

1 year ago

You can load images as an array and move through them sequentially. See:

Processing > File > Examples > Topics > Animation
http://www.shiffman.net/tag/animation/
http://www.creativecoding.org/example/processing:stop-trick-animation

wi11turner

Re: Best way to animate .jpg sequence?

1 year ago

Thanks,

When i use over 40 images,

I get the error:

FATAL EXCEPTION: Animation Thread
java.lang.OutOfMemoryError
    at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:500)
    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:599)
    at processing.core.PApplet.loadImage(Unknown Source)
    at processing.test.sequential.Sequential.setup(Sequential.java:53)
    at processing.core.PApplet.handleDraw(Unknown Source)
    at processing.core.PGraphicsAndroid2D.requestDraw(Unknown Source)
    at processing.core.PApplet.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:856)

I have approximately 200 frames,

Any idea why I am having this problem? (apart from my own inexperience :) )

benja

Re: Best way to animate .jpg sequence?

1 year ago

When you load images, they use a part of your computers memory. The memory is limited, so when you load lots of big images, you will probably hit the memory-limit. You can increase the amount of memory, that processing can use in the program-settings, but only to a certain point.
Alternatively, you could load only a part of the images, then delete the images, after they have been shown and load new ones.

wi11turner

Re: Best way to animate .jpg sequence?

1 year ago

Thanks for the response,

I should have mentioned that the overall size of all 200 frames is a total of 19mb.

Does 19mb sound too big to handle? From my novice perspective it doesn't seem too bad.

benja

Re: Best way to animate .jpg sequence?

1 year ago

The memory consumed by an image is not equal to the filesize of the image. The filesize is pretty small because of compression, but when the images are loaded they are decompressed and stored in memory.
Speaking of "big images", i meant many pixels. An argb-image takes 4 byte per pixel, so the size in memory which a picture consumes is about width*height*4 bytes.

wi11turner

Re: Best way to animate .jpg sequence?

1 year ago

Thanks benja,

I'm slowly learning :)

PhiLho

Re: Best way to animate .jpg sequence?

1 year ago

One should find a way to load binary data from files and to decompress / transform to pixels them on the fly, when they are needed. There might be a CPU impact, but it can save memory...