添加视频画面裁剪功能

app/src/main/java/com/coder/ffmpegtest/ui/KFFmpegCommandActivity.kt

@@ -146,6 +146,7 @@ class KFFmpegCommandActivity : AppCompatActivity() {
                     36 -> hls2Video()
                     37 -> audio2Amr()
                     38 -> makeMuteAudio()
+                    39 -> cropVideoScreen()
                 }
             }
         })
@@ -530,6 +531,13 @@ class KFFmpegCommandActivity : AppCompatActivity() {
         }
     }
 
+    private fun cropVideoScreen() {
+        targetPath = externalCacheDir.toString() + File.separator + "target.mp4"
+        GlobalScope.launch {
+            FFmpegCommand.runCmd(FFmpegUtils.cropVideoScreen(mVideoPath, targetPath, 500, 500, 0, 100), callback("裁切视频画面成功", targetPath))
+        }
+    }
+
     private fun callback(msg: String, targetPath: String?): CommonCallBack? {
         return object : CommonCallBack() {
             override fun onStart() {

app/src/main/res/values/arrays.xml

@@ -67,6 +67,7 @@
         <item>合成hls-视频</item>
         <item>音频转码amr</item>
         <item>生成静音音频</item>
+        <item>视频画面裁切</item>
     </string-array>
 
 </resources>

ffmpeg/src/main/java/com/coder/ffmpeg/utils/FFmpegUtils.kt

@@ -913,4 +913,20 @@ object FFmpegUtils {
         command = String.format(command, src,url)
         return command.split(" ").toTypedArray()
     }
+
+    /**
+     * 使用ffmpeg进行视频画面裁切
+     * @param srcFile 源文件
+     * @param targetFile 目标文件
+     * @param width 输出视频宽度
+     * @param height 输出视频高度
+     * @param x 裁切视频的基准点x坐标
+     * @param y 裁切视频的基准点y坐标
+     */
+    @JvmStatic
+    fun cropVideoScreen(srcFile: String?, targetFile: String?, width: Int, height: Int, x: Int, y: Int): Array<String?> {
+        var command = "ffmpeg -i %s -vf crop=%d:%d:%d:%d %s -y"
+        command = String.format(command, srcFile, width, height, x, y, targetFile)
+        return command.split(" ").toTypedArray()
+    }
 }