视频拼接ffmpeg命令行参数错误: Unable to find a suitable output format for 'file.txt'

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

@@ -377,15 +377,10 @@ class VideoHandleActivity : BaseActivity() {
             Log.e(TAG, "width=$width--height=$height")
         }
         val transformCmd2 = FFmpegUtil.transformVideoWithEncode(appendPath, width, height, outputPath2)
-        val fileList = ArrayList<String>()
-        fileList.add(outputPath1)
-        fileList.add(outputPath2)
+        val fileList = listOf(outputPath1, outputPath2)
         FileUtil.createListFile(listPath, fileList)
         val jointVideoCmd = FFmpegUtil.jointVideo(listPath, targetPath)
-        val commandList = ArrayList<Array<String>>()
-        commandList.add(transformCmd1)
-        commandList.add(transformCmd2)
-        commandList.add(jointVideoCmd)
+        val commandList = listOf(transformCmd1, transformCmd2, jointVideoCmd)
         ffmpegHandler!!.executeFFmpegCmds(commandList)
     }
 

app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java

@@ -354,7 +354,7 @@ public class FFmpegUtil {
      */
     public static String[] jointVideo(String fileListPath, String outputPath) {
         // ffmpeg -f concat -safe 0 -i %s -c copy %s
-        String jointVideoCmd = "ffmpeg -f concat -safe 0 -i file.txt -c copy %s";
+        String jointVideoCmd = "ffmpeg -f concat -safe 0 -i -c copy -y";
         return insert(jointVideoCmd.split(" "), 6, fileListPath, outputPath);
     }