【转载】音频视频转化工具JAVE（ffmpeg的Java封装）
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转自：http://tj007-bo.iteye.com/blog/435740
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JAVE (Java Audio Video Encoder) 类库是一个?ffmpeg?项目的 Java 语言封装。开发人员可以使用JAVE 在不同的格式间转换视频和音频。例如将 AVI 转成 MPEG 动画，等等 ffmpeg 中可以完成的在 JAVE 都有对应的方法。
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From a generic AVI to a youtube-like FLV movie, with an embedded MP3 audio stream:
File source = new File("source.avi");File target = new File("target.flv");AudioAttributes audio = new AudioAttributes();audio.setCodec("libmp3lame");audio.setBitRate(new Integer(64000));audio.setChannels(new Integer(1));audio.setSamplingRate(new Integer(22050));VideoAttributes video = new VideoAttributes();video.setCodec("flv");video.setBitRate(new Integer(160000));video.setFrameRate(new Integer(15));video.setSize(new VideoSize(400, 300));EncodingAttributes attrs = new EncodingAttributes();attrs.setFormat("flv");attrs.setAudioAttributes(audio);attrs.setVideoAttributes(video);Encoder encoder = new Encoder();encoder.encode(source, target, attrs);Next lines extracts audio informations from an AVI and store them in a plain WAV file:
File source = new File("source.avi");File target = new File("target.wav");AudioAttributes audio = new AudioAttributes();audio.setCodec("pcm_s16le");EncodingAttributes attrs = new EncodingAttributes();attrs.setFormat("wav");attrs.setAudioAttributes(audio);Encoder encoder = new Encoder();encoder.encode(source, target, attrs);Next example takes an audio WAV file and generates a 128 kbit/s, stereo, 44100 Hz MP3 file:
File source = new File("source.wav");File target = new File("target.mp3");AudioAttributes audio = new AudioAttributes();audio.setCodec("libmp3lame");audio.setBitRate(new Integer(128000));audio.setChannels(new Integer(2));audio.setSamplingRate(new Integer(44100));EncodingAttributes attrs = new EncodingAttributes();attrs.setFormat("mp3");attrs.setAudioAttributes(audio);Encoder encoder = new Encoder();encoder.encode(source, target, attrs);Next one decodes a generic AVI file and creates another one with the same video stream of the source and a re-encoded low quality MP3 audio stream:
File source = new File("source.avi");File target = new File("target.avi");AudioAttributes audio = new AudioAttributes();audio.setCodec("libmp3lame");audio.setBitRate(new Integer(56000));audio.setChannels(new Integer(1));audio.setSamplingRate(new Integer(22050));VideoAttributes video = new VideoAttributes();video.setCodec(VideoAttributes.DIRECT_STREAM_COPY);EncodingAttributes attrs = new EncodingAttributes();attrs.setFormat("avi");attrs.setAudioAttributes(audio);attrs.setVideoAttributes(video);Encoder encoder = new Encoder();encoder.encode(source, target, attrs);Next one generates an AVI with MPEG 4/DivX video and OGG Vorbis audio:
File source = new File("source.avi");File target = new File("target.avi");AudioAttributes audio = new AudioAttributes();audio.setCodec("libvorbis");VideoAttributes video = new VideoAttributes();video.setCodec("mpeg4");video.setTag("DIVX");video.setBitRate(new Integer(160000));video.setFrameRate(new Integer(30));EncodingAttributes attrs = new EncodingAttributes();attrs.setFormat("mpegvideo");attrs.setAudioAttributes(audio);attrs.setVideoAttributes(video);Encoder encoder = new Encoder();encoder.encode(source, target, attrs);A smartphone suitable video:
File source = new File("source.avi");File target = new File("target.3gp");AudioAttributes audio = new AudioAttributes();audio.setCodec("libfaac");audio.setBitRate(new Integer(128000));audio.setSamplingRate(new Integer(44100));audio.setChannels(new Integer(2));VideoAttributes video = new VideoAttributes();video.setCodec("mpeg4");video.setBitRate(new Integer(160000));video.setFrameRate(new Integer(15));video.setSize(new VideoSize(176, 144));EncodingAttributes attrs = new EncodingAttributes();attrs.setFormat("3gp");attrs.setAudioAttributes(audio);attrs.setVideoAttributes(video);Encoder encoder = new Encoder();encoder.encode(source, target, attrs);