Re: [sdljava-users] SDLVideoTest fails on FC4

[Shane M. W. <swa...@co...>]

Ivan,

Here you go.  Just press the "q" key to quit the example.

Shane

Ivan Z. Ganza wrote:
> Greeting Shane,
>
> Any example code you can provide in C++ would be helpful.  Or if you 
> could give me a C program I can compile and run against sdl that tests 
> the YUV I could then implement enough so those calls can be made on 
> the sdljava side.  Once I can see how the code needs to be utilized  I 
> can have some idea if it can be done easily...
>
> Thanks,
> -Ivan/
>
> Shane M. Walton wrote:
>
>> Thanks Ivan.
>>
>> The SDL_Overlay is very powerful when one would like to render video.
>>
>> Typically MPEG codecs encode/decode pixels into a YUV color space 
>> which is more efficient to operate on than RGB.  So DVD/MPEG2 
>> rendering applications usually take advantage of the YUV overlay 
>> acceleration capabilities of a video card.  This is known as Xv in 
>> the Linux world.  All in all, what you get is the video on the screen 
>> with little or no CPU overhead.  The overlay architecture also 
>> typically have scaling capabilities, which look much softer than any 
>> software routine.
>>
>> I think it would be very worthwhile to have SDL_Overlay(s) 
>> implemented in sdljava, as Java in general really seems to be missing 
>> efficient video rendering capabilities.
>>
>> I can provide you with C/C++ source code examples if you are 
>> interested in adding the SDL_Overlay functionality.  It really isn't 
>> too difficult.  I would offer to add it, but I don't have a clue as 
>> to how SWIG works, but always willing to learn.
>>
>> Shane
>>
>> Ivan Z. Ganza wrote:
>>
>>> Greetings Shane,
>>>
>>> Sorry that your having trouble. I just tried it myself and I don't 
>>> see the image either. Just a blank window. Not sure when this 
>>> stopped working. Should hit myself for not regression testing. I 
>>> will try to figure out the problem.
>>>
>>> Don't want to add more bad news but I never implemented the YUV 
>>> Overlay stuff. Don't really know much about that aspect. Is it just 
>>> a few method calls or much more involved? I think I remember it 
>>> wasn't easy to map (via swig) initially so that is why I skipped it.
>>>
>>> testimage seems to be working fine though. hmm.
>>>
>>> -Ivan/
>>>
>>> Shane M. Walton wrote:
>>>
>>>> The current binary download for Linux i386 doesn’t give me the 
>>>> NullPointerException, but it doesn’t show the test_bmp.bmp aka 
>>>> power plant.
>>>>
>>>> My ultimate goal is to create a Java video application that can 
>>>> render video using the YUV Overlay. Maybe it would just work, but I 
>>>> don’t feel all warm and fuzzy if the test application doesn’t. Has 
>>>> anybody else had this issue?
>>>>
>>>> Shane
>>>>
>>>> ------------------------------------------------------------------------ 
>>>>
>>>>
>>>> *From:* sdl...@li... 
>>>> [mailto:sdl...@li...] *On Behalf Of 
>>>> *Shane M. Walton
>>>> *Sent:* Friday, March 03, 2006 7:35 AM
>>>> *To:* sdl...@li...
>>>> *Subject:* [sdljava-users] SDLVideoTest fails on FC4
>>>>
>>>> OS: Fedora Core 4 (i686)
>>>>
>>>> SDL: 1.2.8-3.2
>>>>
>>>> JDK: Sun 1.5.0_06
>>>>
>>>> SWIG: 1.3.24-2
>>>>
>>>> The following happens with both stable release and cvs trunk checkout:
>>>>
>>>> java -Djava.library.path=./lib -cp ./classes/ 
>>>> sdljava.video.SDLVideoTest
>>>>
>>>> Video subsystem initialized
>>>>
>>>> java.lang.NullPointerException
>>>>
>>>> at sdljava.video.SDLPixelFormat.getPalette(SDLPixelFormat.java:61)
>>>>
>>>> at sdljava.video.SDLPixelFormat.toString(SDLPixelFormat.java:375)
>>>>
>>>> at sdljava.video.SDLSurface.toString(SDLSurface.java:1122)
>>>>
>>>> at java.lang.String.valueOf(String.java:2577)
>>>>
>>>> at java.lang.StringBuffer.append(StringBuffer.java:220)
>>>>
>>>> at sdljava.video.SDLVideoTest.init(SDLVideoTest.java:21)
>>>>
>>>> at sdljava.video.SDLVideoTest.main(SDLVideoTest.java:70)
>>>>
>>>> Seems like all accessors in SDLPixelFormat throw a 
>>>> NullPointerException.
>>>>
>>>> Thanks.
>>>>
>>>> Shane
>>>>
>>>
>>>
>>>
>>> -------------------------------------------------------
>>> This SF.Net email is sponsored by xPML, a groundbreaking scripting 
>>> language
>>> that extends applications into web and mobile media. Attend the live 
>>> webcast
>>> and join the prime developer group breaking into this new coding 
>>> territory!
>>> http://sel.as-us.falkag.net/sel?cmd=k&kid0944&bid$1720&dat1642
>>> _______________________________________________
>>> sdljava-users mailing list
>>> sdl...@li...
>>> https://lists.sourceforge.net/lists/listinfo/sdljava-users
>>>
>>
>>
>>
>> -------------------------------------------------------
>> This SF.Net email is sponsored by xPML, a groundbreaking scripting 
>> language
>> that extends applications into web and mobile media. Attend the live 
>> webcast
>> and join the prime developer group breaking into this new coding 
>> territory!
>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642
>> _______________________________________________
>> sdljava-users mailing list
>> sdl...@li...
>> https://lists.sourceforge.net/lists/listinfo/sdljava-users
>
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by xPML, a groundbreaking scripting 
> language
> that extends applications into web and mobile media. Attend the live 
> webcast
> and join the prime developer group breaking into this new coding 
> territory!
> http://sel.as-us.falkag.net/sel?cmd=k&kid0944&bid$1720&dat1642
> _______________________________________________
> sdljava-users mailing list
> sdl...@li...
> https://lists.sourceforge.net/lists/listinfo/sdljava-users
>