java多媒体文件编码、处理工具类

 <dependency>
                <groupId>org.apache.storm</groupId>
                <artifactId>storm-core</artifactId>
                <version>1.1.0</version>
            </dependency>
            <dependency>
                <groupId>org.apache.storm</groupId>
                <artifactId>storm-kafka</artifactId>
                <version>1.0.4</version>
            </dependency>
 <dependency>
            <groupId>org.jcodec</groupId>
            <artifactId>jcodec</artifactId>
            <version>0.2.5</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>io.humble</groupId>
            <artifactId>humble-video-all</artifactId>
            <version>0.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.mp4parser</groupId>
            <artifactId>isoparser</artifactId>
            <version>1.9.39</version>
        </dependency>

合并ffmpeg切割的hls音视频碎片文件

 /***
     *https://stackoverflow.com/questions/38123693/how-to-concatenate-merge-two-videos-in-a-new-video-file-in-java
     * @param aggregate 合并待输出文件
     * @param segments MPEG transport stream(FFMpeg mpegts)、 MPEG-2 TS视频;波形声音
     * @throws InterruptedException
     * @throws IOException
     */
    private void merge(File aggregate, Collection<File> segments) throws InterruptedException, IOException {

        Muxer muxer = Muxer.make(aggregate.toString(), MuxerFormat.getFormat(96), "wav");

        final MediaPacket packet = MediaPacket.make();
        long dts_offset = 0;
        long pts_offset = 0;

        for (File segment : segments) {
            Demuxer demuxer = Demuxer.make();
            //option https://ffmpeg.org/ffmpeg-formats.html
            demuxer.open(segment.toString(), null, false, true, null, null);
            if (muxer.getState() == Muxer.State.STATE_INITED) {
                int numStreams = demuxer.getNumStreams();
                for (int s = 0; s < numStreams; s++) {
                    DemuxerStream demuxerStream = demuxer.getStream(s);
                    Decoder decoder = demuxerStream.getDecoder();
                    muxer.addNewStream(decoder);
                }
                muxer.open(null, null);
            }
            long dts_max = 0;
            long pts_max = 0;
            while (demuxer.read(packet) >= 0) {
                if (packet.isComplete()) {
                    packet.setDts(packet.getDts() + dts_offset);
                    packet.setPts(packet.getPts() + pts_offset);
                    dts_max = packet.getDts() + 1;
                    pts_max = packet.getPts() + 1;

                    muxer.write(packet, false);
                }
            }
            dts_offset = dts_max;
            pts_offset = pts_max;
            demuxer.close();
        }
        muxer.close();
    }

@Test
    public void testFormat()
    {
        MuxerFormat format = MuxerFormat.getFormat(128);
        System.out.println(format);
        Collection<MuxerFormat> formats = MuxerFormat.getFormats();
        formats.stream().forEach(this::out);
    }

    void out(MuxerFormat format)
    {
        System.out.printf("%s %s\n",format.getName(),format.getMimeType());
    }
    @Test
    public void test() throws IOException, InterruptedException {
        String directory = "C:\\Users\\Administrator\\AppData\\Local\\Temp\\8ad088a2-0bb3-41dc-89d9-2c57ef8414b0";
        List<File> files = Files.list(Paths.get(directory)).map(path -> path.toFile()).filter(file -> file.getName().endsWith(".ts"))
                .collect(Collectors.toList());
        File dest = new File(directory+"\\dest.wav");
        merge(dest,files);
    }