javacv 视频转换

注意：下载了javacv-0.7-bin.zip，还要下载javacv-0.7-cppjars.zip，后者支持ffmpeg的使用

下面是一段opencv转换视频的代码，在我使用中报错

import java.io.File;

import com.googlecode.javacv.FFmpegFrameGrabber;

import com.googlecode.javacv.FFmpegFrameRecorder;

import com.googlecode.javacv.Frame;

import com.googlecode.javacv.cpp.avcodec;

public class ConvertVideo {

public static String convert(File file) {

FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber(file.getAbsolutePath());

String fileName = null;

Frame captured_frame = null;

FFmpegFrameRecorder recorder = null;

try {

frameGrabber.start();

fileName = file.getAbsolutePath().replace(".mp4", “_edited.mp4”);

recorder = new FFmpegFrameRecorder(fileName, frameGrabber.getImageWidth(), frameGrabber.getImageHeight(),frameGrabber.getAudioChannels());

recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264); //avcodec.AV_CODEC_ID_H264  //AV_CODEC_ID_MPEG4

recorder.setFormat(“mp4”);

recorder.setFrameRate(frameGrabber.getFrameRate());

recorder.setSampleFormat(frameGrabber.getSampleFormat()); //

recorder.setSampleRate(frameGrabber.getSampleRate());

//—–recorder.setAudioChannels(frameGrabber.getAudioChannels());

recorder.setFrameRate(frameGrabber.getFrameRate());

recorder.start();

while (true) {

try {

captured_frame = frameGrabber.grabFrame();

if (captured_frame == null) {

System.out.println("!!! Failed cvQueryFrame");

break;

}

recorder.setTimestamp(frameGrabber.getTimestamp());

recorder.record(captured_frame);

} catch (Exception e) {

}

}

recorder.stop();

recorder.release();

frameGrabber.stop();

} catch (Exception e) {

e.printStackTrace();

}

file.delete();

return fileName;

}

}

报错如下， 开始我以为是配置的原因，毕竟提示" Could not open audio codec “，折腾了半天也没解决，后来有人说是record参数问题，此事我看到了错误有sample format..unsurport, 于是把recorder.setSampleFormat(frameGrabber.getSampleFormat()); 一句注释掉，就ok了！