Question

我有多个视频以相同的帧速率和分辨率录制。我想将两个视频合并为一个视频，因此结果文件将是大视频。我正在使用MP4解析器api并使用下面的代码 -

Movie countVideo = new MovieCreator().build(Channels.newChannel(MuxExample.class.getResourceAsStream("/count-video.mp4")));
Movie countAudioDeutsch = new MovieCreator().build(Channels.newChannel(MuxExample.class.getResourceAsStream("/count-deutsch-audio.mp4")));
Movie countAudioEnglish = new MovieCreator().build(Channels.newChannel(MuxExample.class.getResourceAsStream("/count-english-audio.mp4")));

并使用jar isoviewer-1.0-RC-35.jar。但它在行中给出错误 -

Movie countVideo = new MovieCreator().build(Channels.newChannel(MuxExample.class.getResourceAsStream("/count-video.mp4")));

在构建方法。它说The method build(String) in the type MovieCreator is not applicable for the arguments (FileChannel)

jar是否有任何问题。我必须使用哪个jar。或任何其他方式来做到这一点。请帮我解决这一点。

Answer 1

试试这个：

我做了两个视频文件。

 public static void main(String[] args)
  {

    String filenamevideo = "f:/testvidfol/video.mp4"; //video file on your disk
    String filenameaudio = "f:/testvidfol/audio.wav"; //audio file on your disk


    IMediaWriter mWriter = ToolFactory.makeWriter("f:/testvidfol/videowriter.flv"); //output file

    IContainer containerVideo = IContainer.make();
    IContainer containerAudio = IContainer.make();

    if (containerVideo.open(filenamevideo, IContainer.Type.READ, null) < 0)
        throw new IllegalArgumentException("Cant find " + filenamevideo);

    if (containerAudio.open(filenameaudio, IContainer.Type.READ, null) < 0)
        throw new IllegalArgumentException("Cant find " + filenameaudio);

    int numStreamVideo = containerVideo.getNumStreams();
    int numStreamAudio = containerAudio.getNumStreams();

    System.out.println("Number of video streams: "+numStreamVideo + "\n" + "Number of audio streams: "+numStreamAudio );

int videostreamt = -1; //this is the video stream id
int audiostreamt = -1;

IStreamCoder  videocoder = null;

    for(int i=0; i<numStreamVideo; i++){
        IStream stream = containerVideo.getStream(i);
        IStreamCoder code = stream.getStreamCoder();

        if(code.getCodecType() == ICodec.Type.CODEC_TYPE_VIDEO)
        {
            videostreamt = i;
            videocoder = code;
            break;
        }

    }

    for(int i=0; i<numStreamAudio; i++){
        IStream stream = containerAudio.getStream(i);
        IStreamCoder code = stream.getStreamCoder();

        if(code.getCodecType() == ICodec.Type.CODEC_TYPE_AUDIO)
        {
            audiostreamt = i;
            break;
        }

    }

    if (videostreamt == -1) throw new RuntimeException("No video steam found");
    if (audiostreamt == -1) throw new RuntimeException("No audio steam found");

    if(videocoder.open()<0 ) throw new RuntimeException("Cant open video coder");
    IPacket packetvideo = IPacket.make();

    IStreamCoder audioCoder = containerAudio.getStream(audiostreamt).getStreamCoder();

    if(audioCoder.open()<0 ) throw new RuntimeException("Cant open audio coder");
    mWriter.addAudioStream(0, 0, audioCoder.getChannels(), audioCoder.getSampleRate());

    mWriter.addVideoStream(1, 1, videocoder.getWidth(), videocoder.getHeight());

    IPacket packetaudio = IPacket.make();

    while(containerVideo.readNextPacket(packetvideo) >= 0 ||
            containerAudio.readNextPacket(packetaudio) >= 0){

        if(packetvideo.getStreamIndex() == videostreamt){

            //video packet
            IVideoPicture picture = IVideoPicture.make(videocoder.getPixelType(),
                    videocoder.getWidth(),
                    videocoder.getHeight());
            int offset = 0;
            while (offset < packetvideo.getSize()){
                int bytesDecoded = videocoder.decodeVideo(picture, 
                        packetvideo, 
                        offset);
                if(bytesDecoded < 0) throw new RuntimeException("bytesDecoded not working");
                offset += bytesDecoded;

                if(picture.isComplete()){
                    System.out.println(picture.getPixelType());
                    mWriter.encodeVideo(1, picture);

                }
            }
        } 

        if(packetaudio.getStreamIndex() == audiostreamt){   
        //audio packet

            IAudioSamples samples = IAudioSamples.make(512, 
                    audioCoder.getChannels(),
                    IAudioSamples.Format.FMT_S32);  
            int offset = 0;
            while(offset<packetaudio.getSize())
            {
                int bytesDecodedaudio = audioCoder.decodeAudio(samples, 
                        packetaudio,
                        offset);
                if (bytesDecodedaudio < 0)
                    throw new RuntimeException("could not detect audio");
                offset += bytesDecodedaudio;

                if (samples.isComplete()){
                     mWriter.encodeAudio(0, samples);

        }
            }

    }

  }
}

希望它会对你有所帮助。

Answer 2

build（）方法使用String，因为它接受文件路径，如

Movie countVideo = new MovieCreator().build(Channels.newChannel("c:/video/count-video.mp4"));

合并文件中的多个视频文件

2 个答案: