Java利用Jave转换视频格式为3gp

/**

* 将上传的视频转换为3gp标清格式

*

* @param resourceId

* @return

*/

public static Map<String, Object> to3GP(String resourceId) {

String sourcePath = "E:";

String sourceFilePath = sourcePath + "/" + resourceId;

logger.info("--------------------sourceFilePath:" + sourceFilePath);

String targetSourceId = (resourceId.substring(0,resourceId.lastIndexOf(".")))+ ".3gp";

String targetFilePath = sourcePath + "/" + targetSourceId;

logger.info("--------------------targetFilePath:" + targetFilePath);

Map<String, Object> returnMap = new HashMap<String, Object>();

File source = new File(sourceFilePath);

File target = new File(targetFilePath);

Encoder encoder = new Encoder();

MultimediaInfo info=null;

if(!source.exists()){

logger.info("source not exists");

}

try {

info = encoder.getInfo(source);

} catch (Exception e) {

logger.error(e);

}

// 获取源文件的视频信息

VideoInfo videoInfo = info.getVideo();

// int vodeoBitRate=videoInfo.getBitRate(); //总比特率

// int videoFrameRate=(int)videoInfo.getFrameRate();//帧速率

// String videoDecoder=videoInfo.getDecoder();

VideoSize videoSize = videoInfo.getSize();

// 获取源文件的音频信息

AudioInfo audioInfo = info.getAudio();

// int audioBitRate=audioInfo.getBitRate();//比特率

// String audioDecoder=audioInfo.getDecoder();

int audioChannel = audioInfo.getChannels();// 频道

int audioSimplingRate = audioInfo.getSamplingRate();// 音频采样频率

AudioAttributes audio = new AudioAttributes();

audio.setCodec("libfaac");

audio.setBitRate(new Integer(8));

audio.setSamplingRate(new Integer(audioSimplingRate / 2));

audio.setChannels(new Integer(audioChannel));

VideoAttributes video = new VideoAttributes();

video.setCodec("mpeg4");

video.setBitRate(new Integer(100000));

video.setFrameRate(new Integer(16));

video.setSize(new VideoSize((int) (videoSize.getWidth() / 4),(int) (videoSize.getHeight() / 4)));

EncodingAttributes attrs = new EncodingAttributes();

attrs.setFormat("3gp");

attrs.setAudioAttributes(audio);

attrs.setVideoAttributes(video);

try {

encoder.encode(source, target, attrs);

} catch (Exception e) {

logger.error(e);

targetSourceId="";

}

logger.info("--------------------sourceSize:" + source.length());

logger.info("--------------------targetSize:" + target.length());

returnMap.put("resourceID", targetSourceId);

Integer resourceSize=(int) target.length();

returnMap.put("resourceSize", resourceSize);

return returnMap;

}