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background extract video frames

Posted on 2012-09-01
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Last Modified: 2012-09-08
hello

sorry for my bad english

with Delphi 7 I want to extract a set of frames (for example frames 1250 to 1320) from a video file flushed to memory bitmaps

the aim is to analyze the content of images
during the process the video should not be played on the screen (invisible task)

video are avi, if possible I would like to use also mkv or mpeg

I tried with dspack, but even with avi I can't grab frames without displaying the video



thanks for your help
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Question by:jlf51
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Expert Comment

by:ITugay
ID: 38357302
What about moving the form with video outside of screen?
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Author Comment

by:jlf51
ID: 38357706
not bad idea
but not clean, I should prefer a cleaner solution especially since I'm not sure than grab works in these condition

also the frame rate should be greater than that of the video

thanks
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LVL 19

Assisted Solution

by:Thommy
Thommy earned 1500 total points
ID: 38359275
You can try function GrabAVIFrame(...) from Extract a frame from an AVI...
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Accepted Solution

by:
jlf51 earned 0 total points
ID: 38361332
vfw is very old, works only with standard avi

but I found BASIC VIDEO on Torry's :
http://www.torry.net/pages.php?id=168

free without source, seems unimited and without nag screen, it can use both Windows API and DirectX
I tried it, it can do what I want

thanks
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Author Closing Comment

by:jlf51
ID: 38378994
vfw is too old
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