H265视频编码转H264编码

    /**
     * 完成编码转换
     *
     * @param inputFile
     * @param outputFile
     * @return
     * @throws Exception
     */
    public static void convert(String inputFile, String outputFile) throws Exception {
        FFmpegFrameGrabber grabber = FFmpegFrameGrabber.createDefault(inputFile);
        Frame captured_frame;
        FFmpegFrameRecorder recorder = null;
        try {
            grabber.start();
            recorder = new FFmpegFrameRecorder(outputFile, grabber.getImageWidth(), grabber.getImageHeight());
            recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
            recorder.setVideoCodecName("libx264");
            recorder.setFormat("mp4");
            recorder.setVideoQuality(35);
            recorder.setFrameRate(grabber.getFrameRate());
            recorder.setSampleRate(grabber.getSampleRate());
            recorder.setVideoBitrate(grabber.getVideoBitrate());
            recorder.setAspectRatio(grabber.getAspectRatio());
            recorder.setAudioBitrate(grabber.getAudioBitrate());
            recorder.setAudioOptions(grabber.getAudioOptions());
            recorder.start();
            while (true) {
                captured_frame = grabber.grabFrame();
                if (captured_frame == null) {
                    System.out.println("转码完成");
                    break;
                }
                recorder.record(captured_frame);
            }
        } catch (FrameRecorder.Exception e) {
            e.printStackTrace();
        } finally {
            if (recorder != null) {
                try {
                    recorder.stop();
                    recorder.close();
                } catch (Exception e) {
                    System.out.println("recorder.close异常" + e);
                }
            }
            try {
                grabber.close();
            } catch (FrameGrabber.Exception e) {
                System.out.println("frameGrabber.close异常" + e);
            }
        }
    }