pl_win_dspack: SampleGrabber not working
lazarus / 72-DirectX

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Dzandaa · 2023-04-18 14:11

Hi,

I tried to compile SampleGrabber from pl_win_dspack on Win64

The video play fine, but the Snapshot does nothing.

The Snapshot works when I change the TVideoWindow to vmVMR mode, but
the program crashes on exit.

Any Idea?

Thank you.

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avra · 2023-04-20 18:38

I have found out that dspack already exists as native Lazarus
component, so I will probably kick it out of the next ct4laz release.

Anyway, you can try to uninstall pl_win_dspack and install original
version from https://github.com/TheBlackSheep/DSPack-Lazarus

If problem does not go away, I suggest you to open a bug report in
original repo.

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af0815 · 2023-04-21 05:49

I have concated the versions of
Clootie -> MS DirectX 9.0 SDK = http://www.clootie.ru/fpc/index.html
The BlachSheep -> DSPack - Lazarus version of the progdigy DSPack
DirectShow Multimedia components =
https://github.com/TheBlackSheep/DSPack-Lazarus
Mike.Cornflake -> lazarusvideoutilities =
https://sourceforge.net/projects/lazarusvideoutilities/

Original it was from clootie the and prodigy. But i found some
patches, extensions and put all together in the repos. There is a
branch called WIP_Andi there is some doku in TEX format colleted about
the DirectShow. Because i will never use pl_* Packages.

QuoteThe video play fine, but the Snapshot does nothing. For this a
sample is needed, because i work with snapshots often and see only a
problem if the camera/source change the format of the datastream. And
such a format change must be handled correct.

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Dzandaa · 2023-04-22 10:24

Thank you very much.

I've found an alternative solution by copying the TVideoWindows canvas
to a TBitmap an then save the TBitmap to a file.

B->