FFmpegFrameGrabber not working in latest version 1.5.7

[khalidwaleed0]

This is my code :
FFmpegFrameGrabber grabber = new FFmpegFrameGrabber("desktop");
grabber.setFormat("gdigrab");
grabber.setFrameRate(30);
grabber.start();

It gives me this error

org.bytedeco.javacv.FFmpegFrameGrabber$Exception: av_find_input_format() error: Could not find input format "gdigrab". (For more details, make sure FFmpegLogCallback.set() has been called.)
at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:881)
at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:849)
at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:844)
at Main.main(Main.java:11)

Same code works if I downgraded javacv to 1.5.6

[saudet]

Call FFmpegFrameGrabber.tryLoad() before anything else.

[saudet]

Duplicate of #1756.