javacv-paltform-1.5.7 cann't recognize the "rotate" of a video-inputStream while 1.5.6 can.

[崔鹏飞]

the following code of java:

{

FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(videoStream);
grabber.start();
String rotate = grabber.getVideoMetadata("rotate");

}

the videoStream is a inputStream of a video which has a rotation of "180"，but when i use the dependency of javacv-platform(version is 1.5.7)，the variable "rotate" above always is null，i want to know why， expection fro your response, thanks a lot.

[Samuel Audet]

Could you please provide a link to a sample video file that has this problem?

--

[崔鹏飞]

the vide file is attached.

Samuel Audet 在 2022年6月6日 星期一下午7:16:38 [UTC+8] 的信中寫道：

[Samuel Audet]

Indeed, the "rotate" metadata appears in the output of ffprobe with FFmpeg 4.4.x, but not in the output of ffprobe with FFmpeg 5.0.x.

This appears to be a known issue already: https://trac.ffmpeg.org/ticket/9452

They say we should use the "side data" now, so someone will need to work on adding support for that: https://github.com/bytedeco/javacv/issues/1361

Samuel