select the suitable output resolution

select the suitable output resolution

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

@@ -387,8 +387,24 @@ public class VideoHandleActivity extends BaseActivity {
     private void convertGifInHighQuality(String gifPath, String videoPath, int startTime, int duration, int frameRate) {
         new Thread(() -> {
             mHandler.sendEmptyMessage(MSG_BEGIN);
+            int width=0, height=0;
+            int rotateDegree = 0;
+            try {
+                MediaMetadataRetriever retriever = new MediaMetadataRetriever();
+                retriever.setDataSource(videoPath);
+                String mWidth = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
+                String mHeight = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
+                width = Integer.valueOf(mWidth);
+                height = Integer.valueOf(mHeight);
+                String rotate = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
+                rotateDegree = Integer.valueOf(rotate);
+                retriever.release();
+                Log.e(TAG, "retrieve width=" + width + "--height=" + height + "--rotate=" + rotate);
+            } catch (Exception e) {
+                Log.e(TAG, "retrieve error=" + e.toString());
+            }
             long start = System.currentTimeMillis();
-            HighQualityGif highQualityGif = new HighQualityGif();
+            HighQualityGif highQualityGif = new HighQualityGif(width, height, rotateDegree);
             boolean result = highQualityGif.convertGIF(gifPath, videoPath, startTime, duration, frameRate);
             Log.e(TAG, "convert gif result=" + result + "--time=" + (System.currentTimeMillis()-start));
             mHandler.sendEmptyMessage(MSG_FINISH);

app/src/main/java/com/frank/ffmpeg/gif/HighQualityGif.java

@@ -29,13 +29,45 @@ public class HighQualityGif {
 
     private final static int TARGET_HEIGHT = 180;
 
+    private int mWidth;
+    private int mHeight;
+    private int mRotateDegree;
+
+    public HighQualityGif(int width, int height, int rotateDegree) {
+        mWidth = width;
+        mHeight = height;
+        mRotateDegree = rotateDegree;
+    }
+
+    private int chooseWidth(int width, int height) {
+        if (width <= 0 || height <= 0) {
+            return TARGET_WIDTH;
+        }
+        int target;
+        if (mRotateDegree == 0 || mRotateDegree == 180) {//landscape
+            if (width > TARGET_WIDTH) {
+                target = TARGET_WIDTH;
+            } else {
+                target = width;
+            }
+        } else {//portrait
+            if (height > TARGET_HEIGHT) {
+                target = TARGET_HEIGHT;
+            } else {
+                target = height;
+            }
+        }
+        return target;
+    }
+
     private byte[] generateGif(String filePath, int startTime, int duration, int frameRate) throws IllegalArgumentException {
         if (TextUtils.isEmpty(filePath)) {
             return null;
         }
         String folderPath = Environment.getExternalStorageDirectory() + "/gif_frames/";
         FileUtil.deleteFolder(folderPath);
-        String[] commandLine = FFmpegUtil.videoToImageWithScale(filePath, startTime, duration, frameRate, TARGET_WIDTH, folderPath);
+        int targetWidth = chooseWidth(mWidth, mHeight);
+        String[] commandLine = FFmpegUtil.videoToImageWithScale(filePath, startTime, duration, frameRate, targetWidth, folderPath);
         FFmpegCmd.executeSync(commandLine);
         File fileFolder = new File(folderPath);
         if (!fileFolder.exists() || fileFolder.listFiles() == null) {