recorder.record(frame); It's blocked here

[redoriental]

for (;;) { try { System.out.println(1); frame = grabber.grab(); System.out.println(2); if ((frame) != null) { System.out.println(3); recorder.setTimestamp(frame.timestamp); recorder.record(frame); System.out.println(4); } } catch (Exception e) { throw new RuntimeException(e); } } After I use javacv to transcode the stream for a period of time, in recorder.record (frame); There's a blockage here The last print number before blocking is 3

[saudet]

Please make sure that FFmpegLogCallback.set() has been called.

[saudet]

Could you also provide all the messages that you get in the log?