It can play 4 seconds normally on Windows, and the same code can play 4 seconds many times faster on Linux

[zhushizhan]

public static boolean createMp4(String mp4SavePath, Map<Integer, File> imgMap, int width, int height) {
// System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
try (FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(mp4SavePath, width, height);
Java2DFrameConverter converter = new Java2DFrameConverter()) {
recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
// recorder.setVideoCodec(avcodec.AV_CODEC_ID_MPEG4);
recorder.setFrameRate(25);
recorder.setFrameNumber(250);
recorder.setPixelFormat(avutil.AV_PIX_FMT_YUV420P);
recorder.setAudioBitrate(900000000);
recorder.setAudioQuality(0);
recorder.setVideoOption("crf", "0");
// recorder.setVideoOption("r", "25");
recorder.setVideoOption("s", width + "x" + height);
recorder.setVideoOption("b", "16000k");
recorder.setVideoOption("preset", "slow");
recorder.setVideoOption("tune", "zerolatency");
recorder.setVideoOption("qscale", "0.01");
recorder.setFormat("mp4");
recorder.start();
for (int i = 0; i < imgMap.size(); i++) {
BufferedImage read = ImageIO.read(imgMap.get(i));
recorder.record(converter.getFrame(read));
}
recorder.stop();
recorder.release();
return true;
} catch (Exception e) {
System.out.println("error:" + e.getMessage());
return false;
}

[saudet]

Please refer to this sample code:
https://github.com/bytedeco/javacv/blob/master/samples/JavaFxPlayVideoAndAudio.java

[zhushizhan]

Please refer to this sample code: https://github.com/bytedeco/javacv/blob/master/samples/JavaFxPlayVideoAndAudio.java

Maybe what I said is not accurate, I am in the image after the synthesis of the video, the result is like this

[saudet]

If you're expecting FFmpeg to create image files, you might need to call recorder.close() before that happens.