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Deinterlace Picture in FFmpegFrameGrabber #38

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Its not a Problem, but a Question. Related to FFmpegFramegrabber Class.  

Short Version: How can I use a function like this:

DeprecatedFunctions.avpicture_deinterlace(dst, src, pix_fmt, width, height);

This Function is "Deprecated". What is current workaround when I have 
interlaced video material? How can I deinterlace the picture within the  
FFmpegFramegrabber class?

What version of the product are you using? On what operating system?
Win7 64bit
OpenCv 2.1.0

Original issue reported on code.google.com by Neutr...@web.de on 9 Dec 2010 at 10:59

GoogleCodeExporter commented 9 years ago 
I don't see it as part of the deprecated functions, reference:
http://code.google.com/p/javacv/source/browse/trunk/javacv/src/com/googlecode/ja
vacv/jna/avcodec.java?r=70#1498   ?
I don't know how to use this function, but you may use it in any appropriate 
manner within FFmpegFrameGrabber yes.. Please let me know the modifications you 
make so I may incorporate them in a future version of JavaCV, thank you

Original comment by samuel.a...@gmail.com on 12 Dec 2010 at 11:16

GoogleCodeExporter commented 9 years ago 
Thanks for your Answer. I found my mistake.

Your Class "DeprecatedFunctions" extends avcodec... so I was calling:
DeprecatedFunctions.avpicture_deinterlace(......);

I did not know that I can call the "Opt"-class...
I think the right way is to call: 
Opt.avpicture_deinterlace(...);

Because it`s a static call it doesn`t matter....my mistake sorry.

Here is my code for the FFMPEGFramegrabber class attached:

I modified it for my needs. When calling the grab()-method I call the native 
deinterlace funktion. And use the grabbed Frame(pFrame) as src and destionation.
See Line 382 in the attached File. 
if(dointerlace){                                    
Opt.avpicture_deinterlace(pFrame, pFrame, pCodecCtx.pix_fmt, pCodecCtx.width, 
pCodecCtx.height);
}

It works. :-)

What I also did:
Set a start time when playing a video file. See line 215-227. I didn`t check 
the functionality of this. So don`t use this part of code.

Original comment by Neutr...@web.de on 13 Dec 2010 at 8:42

Attachments:

GoogleCodeExporter commented 9 years ago 
Thanks! Will incorporate this in the next release...

Original comment by samuel.a...@gmail.com on 14 Dec 2010 at 7:00

GoogleCodeExporter commented 9 years ago 
Added deinterlace setting to latest version. If it does not work correctly, 
please reopen. Otherwise, please change status to "Verified", thank you.

Original comment by samuel.a...@gmail.com on 19 Feb 2011 at 3:53