GSVideo frame(), length(), duration() and jump() functions not working in my sketch

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jobleonard

GSVideo frame(), length(), duration() and jump() functions not working in my sketch

in Contributed Library Questions • 2 years ago

First of all, a big thank you to Andres Colubri for his GSVideo and GLGraphics libraries - somehow, compared to a full CPU load with stuttering images in Cinder, my ported sketch instead has only a 20% load with no stuttering at all! I didn't expect Java to be superior to a C++ framework at something like this! :D

Now, I'd like to make a sketch that plays random short clips of different movies in sequence, so I need (amongst other things) to check how long the movie is and to be able to jump to a frame within the movie. However, the functions that are supposed to let me do this don't work on my computer (Windows 2008 with default Processing 1.5.1). They all return 0, or jump to frame 0 regardless of input.

This might not be GSVideo's fault - maybe the movies I'm using don't decode properly or something. They're encoded in H264, in an MP4 file. Could that influence this?

Thanks again!

Job

Replies(10)

jeff_g

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

I know Andres is close to releasing a new version of GSVideo. I'll send him a quick message so if it is an issue, he can include the fix in the release.

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

Spoke a moment too soon (seriously.. like 10 minutes). He has just release a new version of GSVideo with GLGraphics. Check it out!

https://codeanticode.wordpress.com/2011/05/16/glgraphics-099-released/

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

I did, it reduced the CPU load even more, which is great of course.

It didn't solve the issue though :(. I'll test with some other movies, see if the functions work then.

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andres

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

Hi, do the examples Frames and Scratch that come with the library work as expected?

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

Yep.

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jobleonard

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

Ok, now I'm really confused: the movies work fine if I put them in the Frames and Scratch example... yet the same movies refuse to jump in my code.

EDIT: I figured out part of it; the length() function didn't work because no frame had been read yet.

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andres

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

Thanks for the update. Good to know you found a workaround, at least partial.

I won't be able to work on GSVideo during the next couple of weeks, so I recommend that you enter a bug report in the sourceforge tracker.

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

Well, I just fixed the problem, so no bugs to report!

EDIT: See next post

~~I can share my working code though, so others might use it ;)~~

~~http://jobleonard.nl/Eindexamen/Eindexamen.pde~~

~~http://jobleonard.nl/Eindexamen/Directories.pde~~

~~http://jobleonard.nl/Eindexamen/Movie.pde~~

~~http://jobleonard.nl/Eindexamen/consoleOutput.txt~~

~~"Eindexamen" means final exams, btw. So yeah, it's important I get this working right :P~~

I'm not quite sure what made the thing work, but I don't think it's really a GSVideo bug. More likely it's the result of loading, initialising, playing and messing around with multiple movies at the same time (even if it's only two). Just look at the console output; halfway something weird happens where it loads a movie too early or something (wasn't visible on the screen, so I guess we can call that a harmless quirk).

~~Now, onto getting your new GLGraphics/GSVideo integration working with this code!~~

EDIT: Yes, I'm aware that assuming the frameRate of Processing syncs up perfectly with the movies is sloppy (although it's going to be an installation without sound anyway, so it's not necessarily a problem). I'll fix that in a later version.

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jobleonard

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

Just a small update: everything's working flawlessly now.

I've pretty much completely rewritten the code, I *think* I've removed all the bugs, and split out the code into classes for easier use (and hopefully more readable, self-explanatory code).

I figured I'd share it so that others who want to do something similar have some pointers, and maybe get some feedback:

http://jobleonard.nl/Eindexamen/Eindexamen.pde
http://jobleonard.nl/Eindexamen/FileLoader.pde
http://jobleonard.nl/Eindexamen/MovieSwitcher.pde

And here is some example output:

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andres

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

2 years ago

great, thanks for posting the examples!

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GSVideo frame(), length(), duration() and jump() functions not working in my sketch

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Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

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Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

Re: GSVideo frame(), length(), duration() and jump() functions not working in my sketch

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