Encoding works I think, just need to save

app/src/main/AndroidManifest.xml

@@ -3,11 +3,8 @@
     xmlns:tools="http://schemas.android.com/tools"
     package="com.example.myapplication">
 
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
-    <uses-permission android:name="android.permission.READ_INTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE"/>
-    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
 
     <application
         android:allowBackup="true"

app/src/main/java/com/example/myapplication/MainActivity.kt

@@ -1,33 +1,31 @@
 package com.example.myapplication
 
 import android.Manifest
-import android.app.Activity
 import android.content.ContentResolver
 import android.content.Intent
+import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Bundle
-import android.os.FileUtils
 import android.provider.MediaStore
 import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
-import android.view.View
 import android.widget.Toast
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.app.ActivityCompat
+import androidx.core.net.toUri
 import androidx.navigation.findNavController
 import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.setupActionBarWithNavController
 import androidx.navigation.ui.setupWithNavController
-import androidx.recyclerview.widget.LinearLayoutManager
+import com.arthenica.ffmpegkit.FFmpegKit
-import androidx.recyclerview.widget.RecyclerView
+import com.arthenica.ffmpegkit.FFmpegKitConfig
+import com.arthenica.ffmpegkit.FFmpegSession
 import com.example.myapplication.databinding.ActivityMainBinding
 import com.example.myapplication.ui.compressing.CompressingAdapter
-import com.example.myapplication.ui.compressing.CompressingFragment
 import com.example.myapplication.ui.compressing.CompressingItem
 import com.google.android.material.bottomnavigation.BottomNavigationView
-import com.arthenica.ffmpegkit.FFmpegKit
 import java.io.File
 import java.io.FileInputStream
 import java.util.*
@@ -41,6 +39,17 @@ class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
+
+        // VERIFY PERMISSIONS
+        val permission = ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE)
+        if (permission != PackageManager.PERMISSION_GRANTED) {
+            ActivityCompat.requestPermissions(
+                this,
+                arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
+                1
+            )
+        }
+
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
@@ -73,6 +82,9 @@ class MainActivity : AppCompatActivity() {
                 val intent = Intent()
                     .setType("*/*")
                     .setAction(Intent.ACTION_GET_CONTENT)
+                    .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                    .addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
+                    .addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION)
 
                 resultLauncher.launch(intent)
 
@@ -91,24 +103,34 @@ class MainActivity : AppCompatActivity() {
     //grabs output from pressing files, used for grabbing URI
     private var resultLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
         if (result.resultCode == RESULT_OK) {
+
             // There are no request codes
             val data: Uri? = result.data?.data
 
-            val contentResolver: ContentResolver = contentResolver
+            val inUri = FFmpegKitConfig.getSafParameterForRead(this, data)
-            val fileDescriptor = contentResolver.openFileDescriptor(data!!, "r")
-            val fd = fileDescriptor?.fileDescriptor
-            val inputStream = FileInputStream(fd)
-
-            val file = File(data.toString())
-            Log.i("Tag", file.absolutePath)
-
-            val fu = com.example.myapplication.utils.FileUtils(this)
-
-            val test = "-i " + fu.getPath(data) + " -c:v libx264 -preset ultrafast -crf 28 -c:a aac -b:a 128k -movflags +faststart " + fu.getPath(data) + "_converted.mp4"
-            FFmpegKit.execute(test)
 
 
-            val cursor = contentResolver.query(data, null, null, null, null)
+
+
+            val outputFile = File(this.filesDir, "output.mp4")
+
+            if(outputFile.createNewFile()) {
+                Log.i("Tag", "File created")
+            } else {
+                Log.i("Tag", "File not created")
+            }
+
+
+            val outUri = FFmpegKitConfig.getSafParameter(this, outputFile.toUri(), "rw")
+
+            val command = "-i $inUri -c:v mpeg4 $outUri -y"
+            val session = FFmpegKit.execute(command)
+
+            Log.i("Tag", Arrays.deepToString(session.arguments))
+            Log.i("Tag", session.output)
+
+
+            val cursor = contentResolver.query(data!!, null, null, null, null)
 
             cursor?.moveToFirst()
 
@@ -118,8 +140,6 @@ class MainActivity : AppCompatActivity() {
             compressingItems.add(CompressingItem(fileName!!, 0.0, fileDate))
 
             adapter.notifyDataSetChanged()
-
-            Toast.makeText(applicationContext, data.toString(), Toast.LENGTH_LONG).show()
         }
     }