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pl_win_dspack: SampleGrabber not working
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Topic: pl_win_dspack: SampleGrabber not working (Read 1841 times)
Dzandaa
Sr. Member
Posts: 255
From C# to Lazarus
pl_win_dspack: SampleGrabber not working
«
on:
April 18, 2023, 04:11:31 pm »
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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Dzandaa
avra
Hero Member
Posts: 2514
Re: pl_win_dspack: SampleGrabber not working
«
Reply #1 on:
April 20, 2023, 08:38:25 pm »
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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ct2laz
- Conversion between Lazarus and CodeTyphon
bithelpers
- Bit manipulation for standard types
pasettimino
- Siemens S7 PLC lib
af0815
Hero Member
Posts: 1291
Re: pl_win_dspack: SampleGrabber not working
«
Reply #2 on:
April 21, 2023, 07:49:50 am »
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.
Quote
The 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.
«
Last Edit: April 21, 2023, 07:57:57 am by af0815
»
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regards
Andreas
Dzandaa
Sr. Member
Posts: 255
From C# to Lazarus
Re: pl_win_dspack: SampleGrabber not working
«
Reply #3 on:
April 22, 2023, 12:24:17 pm »
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->
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Dzandaa
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