bytedeco/javacv
Ver no GitHubFFmpegFrameGrabber should throw an exception when attempting to access stream metadata before calling start()
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#2.382 aberto em 19 de fev. de 2026
enhancementhelp wantedquestion
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Description
As stated in the title, when using FFmpegFrameGrabber, if start() is not called beforehand, methods such as getImageWidth() will return 0. This behavior may cause errors to propagate downstream and lead to issues that are more difficult to trace. I believe an IllegalStateException should be thrown immediately to clearly indicate that this operation is invalid.