FFmpegFrameRecorder no longer support "rotate" metadata

[b005t3r]

I think somewhere between version 1.5.4 and 1.5.7 rotation got moved to "Display Matrix" side data, when in 1.5.4 and prior it was set as "rotate" metadata, when decoding a video with ffmpeg. However, I don't think there's a matching change done in FFmpegFrameRecorder - in 1.5.4 is was simply setting the "rotate" metadata to a desired rotation value, but now it has no effect and I don't see a way of altering the side data on the output video.

Am I missing something or is it a bug?

[saudet]

That was removed with FFmpeg 5.0, so to support that with FFmpegFrameRecorder with FFmpeg 5.x, we probably need to go through AVPacketSideData as with FFmpegFrameGrabber, yes. As usual, contributions are welcome!

[saudet]

Concretely, we need to add a pair of getVideoSideData()/setVideoSideData() property methods to mirror FFmpegFrameGrabber as well as a helper method like setDisplayRotation().

[saudet]

I've added those in commit b1c95f1. Please give it a try with the snapshots: http://bytedeco.org/builds/

[saudet]

JavaCV 1.5.9 has been released with those new methods! Enjoy