如何以编程方式在android中用开始和结束时间修剪视频？

Question

我想以编程方式根据 android 中的开始和结束时间修剪本地视频，我尝试了下面附加的几个链接，但没有为我工作。请让我知道任何可用的库或示例代码来克服这个问题？

参考链接：

1. Android sdk 剪切/修剪视频文件
2. 如何在android中使用FFMPEG库修剪视频？
3. https://superuser.com/questions/377343/cut-part-from-video-file-from-start-position-to-end-position-with-ffmpeg

提前致谢！

Answer 1

使用 FFMPEG 库来解决您的问题。感谢您的 writeminds 使 ffmpeg 在 Android 1 上变得简单。implementation 'com.writingminds:FFmpegAndroid:0.3.2'

2. 初始化 ffmpeg

   private void setUpFFmpeg() {
   ffmpeg = FFmpeg.getInstance(context);
   
   
   try {
       ffmpeg.loadBinary(new LoadBinaryResponseHandler() {
   
           @Override
           public void onStart() {
               Log.d("Event ", "onStart");
           }
   
           @Override
           public void onFailure() {
               Log.d("Event ", "onFailure");
           }
   
           @Override
           public void onSuccess() {
               Log.d("Event ", "onSuccess");
           }
   
           @Override
           public void onFinish() {
               Log.d("Event ", "onFinish");
   
           }
       });
   } catch (FFmpegNotSupportedException e) {
       // Handle if FFmpeg is not supported by device
   }
   }
   

3. 使用FFMPEG 命令，如上面发布的@Mahesh Keshvala。干得好@Mahesh

4. 然后execFFmpegBinary(complexCommand);就会像这样

   private void execFFmpegBinary(String[] command){
         try {
   
       ffmpeg.execute(commands, new ExecuteBinaryResponseHandler() {
   
           @Override
           public void onStart() {
               Log.d("Event ", "onStart");
           }
   
           @Override
           public void onProgress(String message) {
               Log.e("Event ", "onProgress - " + message);
   
           }
   
           @Override
           public void onFailure(String message) {
               Log.e("Event ", "onFailure - " + message);
   
           }
   
           @Override
           public void onSuccess(String message) {
               Log.e("Event ", "onSuccess - " + message);
   
           }
   
           @Override
           public void onFinish() {
               Log.e("Event ", "onFinish");
   
           }
       });
   } catch (FFmpegCommandAlreadyRunningException e) {
       // Handle if FFmpeg is already running
    }
   }
   

尝试剪切视频命令

String[] complexCommand = {"-ss", "" + startMs / 1000, "-y", "-i", inputFileAbsolutePath, "-t", "" + (endMs - startMs) / 1000, "-s", "320x240", "-r", "15", "-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", outputFileAbsolutePath};

要了解有关 ffmpeg android 的更多信息，请参阅此链接

Answer 2

这是使用 FFMPEG 库的解决方案，使用以下函数来修剪或剪切视频，可能这对您有用：

private void executeCutVideoCommand(int startMs, int endMs) {
    File moviesDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES
    );

    String filePrefix = "cut_video";
    String fileExtn = ".mp4";
    String yourRealPath = getPath(VideoEffectActivity.this, selectedVideoUri);
    File dest = new File(moviesDir, filePrefix + fileExtn);
    int fileNo = 0;
    while (dest.exists()) {
        fileNo++;
        dest = new File(moviesDir, filePrefix + fileNo + fileExtn);
    }

    Log.d(TAG, "startTrim: src: " + yourRealPath);
    Log.d(TAG, "startTrim: dest: " + dest.getAbsolutePath());
    Log.d(TAG, "startTrim: startMs: " + startMs);
    Log.d(TAG, "startTrim: endMs: " + endMs);
    filePath = dest.getAbsolutePath();
    //String[] complexCommand = {"-i", yourRealPath, "-ss", "" + startMs / 1000, "-t", "" + endMs / 1000, dest.getAbsolutePath()};
    String[] complexCommand = {"-ss", "" + startMs / 1000, "-y", "-i", yourRealPath, "-t", "" + (endMs - startMs) / 1000, "-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath};

    execFFmpegBinary(complexCommand);

}


 private void execFFmpegBinary(final String[] command) {
    try {
        ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
            @Override
            public void onFailure(String s) {
                Log.d(TAG, "FAILED with output : " + s);
            }

            @Override
            public void onSuccess(String s) {
                Log.d(TAG, "SUCCESS with output : " + s);
               //You have to create a class of Preview Activity
               //If you don't have please remove below Intent code
                    Intent intent = new Intent(VideoEffectActivity.this, PreviewActivity.class);
                    intent.putExtra(FILEPATH, filePath);
                    startActivity(intent);
            }

            @Override
            public void onProgress(String s) {
                    progressDialog.setMessage("progress : " + s);
                Log.d(TAG, "progress : " + s);
            }

            @Override
            public void onStart() {
                Log.d(TAG, "Started command : ffmpeg " + command);
                progressDialog.setMessage("Processing...");
                progressDialog.show();
            }

            @Override
            public void onFinish() {
                Log.d(TAG, "Finished command : ffmpeg " + command);
               progressDialog.dismiss();
            }
        });
    } catch (FFmpegCommandAlreadyRunningException e) {
        // do nothing for now
    }
}

将此依赖项放入 gradle 文件中：

    compile 'com.writingminds:FFmpegAndroid:0.3.2'