translate the note VideoHandleActivity into English

translate the note VideoHandleActivity into English

app/src/main/java/com/frank/ffmpeg/activity/VideoHandleActivity.java

@@ -22,6 +22,10 @@ import java.io.File;
 import static com.frank.ffmpeg.handler.FFmpegHandler.MSG_BEGIN;
 import static com.frank.ffmpeg.handler.FFmpegHandler.MSG_FINISH;
 
+/**
+ * video process by FFmpeg command
+ * Created by frank on 2018/1/25.
+ */
 public class VideoHandleActivity extends BaseActivity {
 
     private final static String TAG = VideoHandleActivity.class.getSimpleName();
@@ -104,7 +108,7 @@ public class VideoHandleActivity extends BaseActivity {
     }
 
     /**
-     * 调用ffmpeg处理视频
+     * call FFmpeg cmd to process video
      *
      * @param srcFile srcFile
      */
@@ -118,11 +122,11 @@ public class VideoHandleActivity extends BaseActivity {
             return;
         }
         switch (viewId) {
-            case R.id.btn_video_transform://视频转码:mp4转flv、wmv, 或者flv、wmv转Mp4
+            case R.id.btn_video_transform://transform format
                 String transformVideo = PATH + File.separator + "transformVideo.mp4";
                 commandLine = FFmpegUtil.transformVideo(srcFile, transformVideo);
                 break;
-            case R.id.btn_video_cut://视频剪切
+            case R.id.btn_video_cut://cut video
                 String suffix = FileUtil.getFileSuffix(srcFile);
                 if (suffix == null || suffix.isEmpty()) {
                     return;
@@ -132,7 +136,7 @@ public class VideoHandleActivity extends BaseActivity {
                 int duration = 20;
                 commandLine = FFmpegUtil.cutVideo(srcFile, startTime, duration, cutVideo);
                 break;
-            case R.id.btn_video_concat://视频合并
+            case R.id.btn_video_concat://concat video
 //                commandLine = FFmpegUtil.toTs(srcFile, ts1);
 //                concatStep ++;
 //                String concatVideo = PATH + File.separator + "concatVideo.mp4";
@@ -150,19 +154,19 @@ public class VideoHandleActivity extends BaseActivity {
 //                }
 //                commandLine = FFmpegUtil.concatVideo(srcFile, concatFile.getAbsolutePath(), concatVideo);
                 break;
-            case R.id.btn_screen_shot://视频截图
+            case R.id.btn_screen_shot://video snapshot
                 String screenShot = PATH + File.separator + "screenShot.jpg";
                 int time = 18;
                 commandLine = FFmpegUtil.screenShot(srcFile, time, screenShot);
                 break;
-            case R.id.btn_water_mark://视频添加水印
+            case R.id.btn_water_mark://add watermark to video
-                //1、图片
+                // picture
                 String photo = PATH + File.separator + "launcher.png";
                 String photoMark = PATH + File.separator + "photoMark.mp4";
                 String mResolution = "720x1280";
                 int bitRate = 1024;
                 commandLine = FFmpegUtil.addWaterMark(srcFile, photo, mResolution, bitRate, photoMark);
-                //2、文字
+                // text
 //                String text = "Hello,FFmpeg";
 //                String textPath = PATH + File.separator + "text.jpg";
 //                boolean result = BitmapUtil.textToPicture(textPath, text, this);
@@ -170,7 +174,7 @@ public class VideoHandleActivity extends BaseActivity {
 //                String textMark = PATH + File.separator + "textMark.mp4";
 //                commandLine = FFmpegUtil.addWaterMark(srcFile, textPath, textMark);
                 break;
-            case R.id.btn_generate_gif://视频转成gif
+            case R.id.btn_generate_gif://convert video into gif
                 String Video2Gif = PATH + File.separator + "Video2Gif.gif";
                 int gifStart = 30;
                 int gifDuration = 5;
@@ -179,13 +183,13 @@ public class VideoHandleActivity extends BaseActivity {
                 commandLine = FFmpegUtil.generateGif(srcFile, gifStart, gifDuration,
                         resolution, frameRate, Video2Gif);
                 break;
-            case R.id.btn_screen_record://屏幕录制
+            case R.id.btn_screen_record://screen recording
 //                String screenRecord = PATH + File.separator + "screenRecord.mp4";
 //                String screenSize = "320x240";
 //                int recordTime = 10;
 //                commandLine = FFmpegUtil.screenRecord(screenSize, recordTime, screenRecord);
                 break;
-            case R.id.btn_multi_video://视频画面拼接:分辨率、时长、封装格式不一致时，先把视频源转为一致
+            case R.id.btn_multi_video://combine video which layout could be horizontal of vertical
                 String input1 = PATH + File.separator + "input1.mp4";
                 String input2 = PATH + File.separator + "input2.mp4";
                 String outputFile = PATH + File.separator + "multi.mp4";
@@ -194,16 +198,16 @@ public class VideoHandleActivity extends BaseActivity {
                 }
                 commandLine = FFmpegUtil.multiVideo(input1, input2, outputFile, VideoLayout.LAYOUT_HORIZONTAL);
                 break;
-            case R.id.btn_reverse_video://视频反序倒播
+            case R.id.btn_reverse_video://video reverse
                 String output = PATH + File.separator + "reverse.mp4";
                 commandLine = FFmpegUtil.reverseVideo(srcFile, output);
                 break;
-            case R.id.btn_denoise_video://视频降噪
+            case R.id.btn_denoise_video://noise reduction of video
                 String denoise = PATH + File.separator + "denoise.mp4";
                 commandLine = FFmpegUtil.denoiseVideo(srcFile, denoise);
                 break;
-            case R.id.btn_to_image://视频转图片
+            case R.id.btn_to_image://convert video to picture
-                String imagePath = PATH + File.separator + "Video2Image/";//图片保存路径
+                String imagePath = PATH + File.separator + "Video2Image/";
                 File imageFile = new File(imagePath);
                 if (!imageFile.exists()) {
                     boolean result = imageFile.mkdir();
@@ -211,25 +215,25 @@ public class VideoHandleActivity extends BaseActivity {
                         return;
                     }
                 }
-                int mStartTime = 10;//开始时间
+                int mStartTime = 10;//start time
-                int mDuration = 20;//持续时间（注意开始时间+持续时间之和不能大于视频总时长）
+                int mDuration = 20;//duration
-                int mFrameRate = 10;//帧率（从视频中每秒抽多少帧）
+                int mFrameRate = 10;//frameRate
                 commandLine = FFmpegUtil.videoToImage(srcFile, mStartTime, mDuration, mFrameRate, imagePath);
                 break;
-            case R.id.btn_pip://两个视频合成画中画
+            case R.id.btn_pip://combine into picture-in-picture video
                 String inputFile1 = PATH + File.separator + "beyond.mp4";
                 String inputFile2 = PATH + File.separator + "small_girl.mp4";
                 if (!FileUtil.checkFileExist(inputFile1) && !FileUtil.checkFileExist(inputFile2)) {
                     return;
                 }
-                //x、y坐标点需要根据全屏视频与小视频大小，进行计算
+                //x and y coordinate points need to be calculated according to the size of full video and small video
-                //比如：全屏视频为320x240，小视频为120x90，那么x=200 y=150
+                //For example: full video is 320x240, small video is 120x90, so x=200 y=150
                 int x = 200;
                 int y = 150;
                 String picInPic = PATH + File.separator + "PicInPic.mp4";
                 commandLine = FFmpegUtil.picInPicVideo(inputFile1, inputFile2, x, y, picInPic);
                 break;
-            case R.id.btn_moov://moov前移操作，针对mp4视频moov在mdat后面的情况
+            case R.id.btn_moov://moov box moves ahead, which is behind mdat box of mp4 video
                 if (!srcFile.endsWith(FileUtil.TYPE_MP4)) {
                     showToast(getString(R.string.tip_not_mp4_video));
                     return;
@@ -258,17 +262,17 @@ public class VideoHandleActivity extends BaseActivity {
     }
 
     /**
-     * 图片合成视频
+     * Combine pictures into video
      */
     private void handlePhoto() {
-        // 图片所在路径，图片命名格式img+number.jpg
+        // The path of pictures, naming format: img+number.jpg
-        // 这里指定目录为根目录下img文件夹
+        // Here assigns the directory is img under the root path
         String picturePath = PATH + "/img/";
         if (!FileUtil.checkFileExist(picturePath)) {
             return;
         }
         String combineVideo = PATH + File.separator + "combineVideo.mp4";
-        int frameRate = 2;// 合成视频帧率建议:1-10  普通视频帧率一般为25
+        int frameRate = 2;// suggested synthetic frameRate:1-10
         String[] commandLine = FFmpegUtil.pictureToVideo(picturePath, frameRate, combineVideo);
         if (ffmpegHandler != null) {
             ffmpegHandler.executeFFmpegCmd(commandLine);