7.x can not open device://

[LazyCuteLion]

i try this:
device://dshow/?video=camera name
device://gdigrab?desktop
it does not work,but local file path is well.

Issue Categories

• Bug

Version Information

• NuGet Package 7.0.361-beta.1

Error

Direct Command 'Close' not accepted. Open media before closing or changing media.
Direct Command 'Open' accepted. Perparing execution.
Direct Command 'Open' entered
Library.LoadFFmpeg: FFmpeg v7.0.1-full_build-www.gyan.dev
Media URI will be updated. Input Format: gdigrab, Input Argument: desktop
Format 'gdigrab' not found. Will use automatic format detection.
“Unosquare.FFME.Common.MediaContainerException”( ffme.win.dll )
“Unosquare.FFME.Common.MediaContainerException”( ffme.win.dll )
Fatal error initializing MediaContainer instance.
MediaContainerException: Could not open 'desktop'. Error -2: No such file or directory
Stack Trace:
Unosquare.FFME.Container.MediaContainer.StreamInitialize()
“Unosquare.FFME.Common.MediaContainerException”(ffme.win.dll)
Direct Command 'Open' execution error
MediaContainerException: Could not open 'desktop'. Error -2: No such file or directory
Stack Trace:
在 Unosquare.FFME.Container.MediaContainer.StreamInitialize()
在 Unosquare.FFME.Container.MediaContainer.Initialize()
在 Unosquare.FFME.Commands.CommandManager.CommandOpenMedia(IMediaInputStream inputStream, Uri streamUri)
在 Unosquare.FFME.Commands.CommandManager.<>c__DisplayClass47_0.b__0()
EVENT START: MediaFailed
EVENT START: MediaClosed
Direct Command 'Open' completed. Result: False
EVENT DONE : MediaFailed
EVENT DONE : MediaClosed

[Axel82]

I have the same problem with “Unosquare.FFME.Windows.Sample”.
The open video is available, but if I want to get the webcam images, the following error appears: Error -2 : No such file or directory.

I've tried :
avdevice://dshow/?video=0
and got the following error: 'Could not open 'avdevice://dshow/?video=0'. Error -1330794744 : Protocol not found'

Any ideas?

[LazyCuteLion]

@Axel82 i think ,it is "device://" ,not "avdevice://" .

[Axel82]

I tried both, and nothing works fine

[LazyCuteLion]

yes,7.x has this issues.
No way has been found yet

[MrBean2016]

I do not know about your specific issues but this is from FFmpeg main repo.

"A new major release, FFmpeg 7.0 "Dijkstra", is now available for download.

...
This release is not backwards compatible, removing APIs deprecated before 6.0.
"

[LazyCuteLion]

@Axel82 @MrBean2016
i got it. must call the method:FFmpeg.AutoGen.ffmpeg.avdevice_register_all()
i dot know what diffrence with old version.