OSX+Radeon crash VideoDataBuffer.convert YCbCr_422 -> BGRA_PRE
kevin.rushforth at oracle.com
Wed May 25 12:29:14 UTC 2016
I'm not surprised this causes problems, as it is almost certainly not
FWIW, this impl_ method is already inaccessible in JDK 9 because it
returns a type that is not exported from the javafx.media module.
Further, this methods will go away very soon as part of the ongoing
encapsulation of all impl_ methods.
Can you file an RFE for a public API to do this? We can consider it for
a future version of JavaFX.
Chris Newland wrote:
> This is really just an FYI as I'm doing funky stuff with multiple
> MediaPlayers and using the deprecated impl_getLatestFrame() method to grab
> I can grab frames fine with a single MediaPlayer instance but when I use
> multiple MediaPlayer objects each with an AnimationTimer calling this
> public void snapshotVideo()
> VideoDataBuffer buf = player.impl_getLatestFrame();
> if (buf != null)
> VideoFormat newFormat = VideoFormat.BGRA_PRE;
> buf = buf.convertToFormat(newFormat);
> ByteBuffer bb =
> int pixel = 0;
> int max = bb.remaining() / 4;
> for (int i = 0; i < max; i++)
> rawFrameData[pixel++] = bb.getInt();
> then it crashes hard on OSX El Capitan with AMD Radeon HD 6970M with this
> I'm guessing the native frame conversion from YCbCr_422 to BGRA_PRE is not
> thread-safe but some naive attempts to lock around this haven't solved the
> This same code + videos works fine on a MacBook Pro with Intel Iris
> graphics so it's a tiny hardware+OS corner case but thought it might be
> worth a mention.
> The only thing I'd add is that I'd love to have an official API for
> grabbing single frames from video. I've been doing some cool real-time
> video effects in JavaFX and it's a shame to have to use a deprecated
> method which will probably go away.
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