FFmpegAndroid执行

Question

在windows上，我可以用ffmpeg剪辑一段带有以下代码的视频。exe

无法在android中使用ffmpeg。我用gradle在我的应用程序中抓取ffmpeg。

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.github.hiteshsondhi88.libffmpeg:FFmpegAndroid:0.2.5'
}

我的方法里有这些台词

VideoIn = getInternalDirectoryPath() + "/Download/Ab.mp4";
VideoOut = getInternalDirectoryPath() + "/Download/Ab1.mp4";

try {
ffmpeg.execute("ffmpeg -i " + VideoIn + " -ss 00:00:03 -c:v libx264 -crf 17 -t 00:00:5 " + VideoOut + " -y",null);
}
catch (FFmpegCommandAlreadyRunningException e) { 
e.printStackTrace();
}

显示此错误：运行exec（）时出错。命令：[/data/data/com.videoeditor.myname.myapp/files/ffmpeg，ffmpeg，-i，/storage/emulated/0/Download/Ab.mp4，-ss，00:00:03，-c:v，libx264，-crf，17，-t，00:00:5，/storage/emulated/0/Download/Ab1.mp4，-y]工作目录：null环境：null

这种方法有什么问题？谢谢你的帮助

Answer 1

朋友们，请注意，如果您的sdk版本等于或高于23（Marshmelow），请不要忘记检查其运行时权限

Android准许写入外部存储器

这是我的问题。一切都很好，但是日志没有显示成功的结果。

Answer 2

好啊您的问题是没有加载ffmpeg二进制文件。您必须在执行命令之前加载它。试着这样做：

private FFmpeg ffmpeg;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    FFmpeg ffmpeg = FFmpeg.getInstance(this);
    try {
        //Load the binary
        ffmpeg.loadBinary(new LoadBinaryResponseHandler() {

            @Override
            public void onStart() {}

            @Override
            public void onFailure() {}

            @Override
            public void onSuccess() {}

            @Override
            public void onFinish() {}
        });
    } catch (FFmpegNotSupportedException e) {
        // Handle if FFmpeg is not supported by device
    }
    try {
        // to execute "ffmpeg -version" command you just need to pass "-version" 
        // Now, you can execute your command here
        ffmpeg.execute("ffmpeg -version", new ExecuteBinaryResponseHandler() {

            @Override
            public void onStart() {}

            @Override
            public void onProgress(String message) {}

            @Override
            public void onFailure(String message) {}

            @Override
            public void onSuccess(String message) {
                Log.i("SUCCESS", message);
            }

            @Override
            public void onFinish() {}
        });
    } catch (FFmpegCommandAlreadyRunningException e) {
        // Handle if FFmpeg is already running
    }
}

更多信息http://hiteshsondhi88.github.io/ffmpeg-android-java/

Answer 3

好的，我找到了答案：使用ffmpeg的这种方法，cmd中不需要“ffmpeg”

简单视频剪辑示例：

 /**
 * Returns the path to internal storage ex:- /storage/emulated/0
 *
 * @return
 */
private String getInternalDirectoryPath() {
    return Environment.getExternalStorageDirectory().getAbsolutePath();
}

VideoIn = getInternalDirectoryPath() + "/Download/Ab.mp4";
VideoOut = getInternalDirectoryPath() + "/Download/Ab1.mp4";

private void CutVideo(){
try {
     ffmpeg.execute("-i "+VideoIn+" -ss 00:01:00 -to 00:02:00 -c copy "+VideoOut ,
new ExecuteBinaryResponseHandler() {

                @Override
                public void onStart() {
                //for logcat
                    Log.w(null,"Cut started");
                }

                @Override
                public void onProgress(String message) {
                //for logcat
                    Log.w(null,message.toString());
                }

                @Override
                public void onFailure(String message) {

                    Log.w(null,message.toString());
                }

                @Override
                public void onSuccess(String message) {

                    Log.w(null,message.toString());
                }

                @Override
                public void onFinish() {

                    Log.w(null,"Cutting video finished");
                }
            });
        } catch (FFmpegCommandAlreadyRunningException e) {
            // Handle if FFmpeg is already running
            e.printStackTrace();
            Log.w(null,e.toString());
        }
}