diff --git a/common/src/main/java/com/pedro/common/Extensions.kt b/common/src/main/java/com/pedro/common/Extensions.kt
index 559694f1b..8b60f991c 100644
--- a/common/src/main/java/com/pedro/common/Extensions.kt
+++ b/common/src/main/java/com/pedro/common/Extensions.kt
@@ -19,6 +19,7 @@ package com.pedro.common
 import android.hardware.camera2.CameraCharacteristics
 import android.hardware.camera2.CaptureRequest
 import android.media.MediaCodec
+import android.media.MediaFormat
 import android.os.Build
 import android.os.Handler
 import android.os.Looper
@@ -144,4 +145,12 @@ fun Throwable.validMessage(): String {
 
 fun MediaCodec.BufferInfo.toMediaFrameInfo() = MediaFrame.Info(offset, size, presentationTimeUs, flags)
 
-fun ByteBuffer.clone(): ByteBuffer = ByteBuffer.wrap(toByteArray())
\ No newline at end of file
+fun ByteBuffer.clone(): ByteBuffer = ByteBuffer.wrap(toByteArray())
+
+fun MediaFormat.getIntegerSafe(name: String): Int? {
+  return try { getInteger(name) } catch (e: Exception) { null }
+}
+
+fun MediaFormat.getLongSafe(name: String): Long? {
+  return try { getLong(name) } catch (e: Exception) { null }
+}
\ No newline at end of file
diff --git a/encoder/src/main/java/com/pedro/encoder/input/decoder/AudioDecoder.java b/encoder/src/main/java/com/pedro/encoder/input/decoder/AudioDecoder.java
index 53b949e80..8d54b7741 100644
--- a/encoder/src/main/java/com/pedro/encoder/input/decoder/AudioDecoder.java
+++ b/encoder/src/main/java/com/pedro/encoder/input/decoder/AudioDecoder.java
@@ -20,6 +20,7 @@
 import android.media.MediaFormat;
 import android.util.Log;
 
+import com.pedro.common.ExtensionsKt;
 import com.pedro.encoder.Frame;
 import com.pedro.encoder.input.audio.GetMicrophoneData;
 import com.pedro.encoder.utils.CodecUtil;
@@ -63,10 +64,14 @@ protected boolean extract(MediaExtractor audioExtractor) {
       }
     }
     if (mediaFormat != null) {
-      channels = mediaFormat.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
+      final Integer channels = ExtensionsKt.getIntegerSafe(mediaFormat, MediaFormat.KEY_CHANNEL_COUNT);
+      final Integer sampleRate = ExtensionsKt.getIntegerSafe(mediaFormat, MediaFormat.KEY_SAMPLE_RATE);
+      final Long duration = ExtensionsKt.getLongSafe(mediaFormat, MediaFormat.KEY_DURATION);
+      if (channels == null || sampleRate == null) return false;
+      this.channels = channels;
       isStereo = channels >= 2;
-      sampleRate = mediaFormat.getInteger(MediaFormat.KEY_SAMPLE_RATE);
-      duration = mediaFormat.getLong(MediaFormat.KEY_DURATION);
+      this.sampleRate = sampleRate;
+      this.duration = duration != null ? duration : -1;
       fixBuffer();
       return true;
       //audio decoder not supported
diff --git a/encoder/src/main/java/com/pedro/encoder/input/decoder/BaseDecoder.java b/encoder/src/main/java/com/pedro/encoder/input/decoder/BaseDecoder.java
index 31d9e9adc..9357af1e2 100644
--- a/encoder/src/main/java/com/pedro/encoder/input/decoder/BaseDecoder.java
+++ b/encoder/src/main/java/com/pedro/encoder/input/decoder/BaseDecoder.java
@@ -210,6 +210,7 @@ public boolean isLoopMode() {
   }
 
   public double getDuration() {
+    if (duration < 0) return duration; //fail to extract duration from file.
     return duration / 10E5;
   }
 
diff --git a/encoder/src/main/java/com/pedro/encoder/input/decoder/VideoDecoder.java b/encoder/src/main/java/com/pedro/encoder/input/decoder/VideoDecoder.java
index f915e33f1..be2eaf0e1 100644
--- a/encoder/src/main/java/com/pedro/encoder/input/decoder/VideoDecoder.java
+++ b/encoder/src/main/java/com/pedro/encoder/input/decoder/VideoDecoder.java
@@ -21,6 +21,7 @@
 import android.os.Build;
 import android.view.Surface;
 
+import com.pedro.common.ExtensionsKt;
 import java.nio.ByteBuffer;
 
 /**
@@ -51,10 +52,15 @@ protected boolean extract(MediaExtractor videoExtractor) {
       }
     }
     if (mediaFormat != null) {
-      width = mediaFormat.getInteger(MediaFormat.KEY_WIDTH);
-      height = mediaFormat.getInteger(MediaFormat.KEY_HEIGHT);
-      duration = mediaFormat.getLong(MediaFormat.KEY_DURATION);
-      fps = mediaFormat.getInteger(MediaFormat.KEY_FRAME_RATE);
+      final Integer width = ExtensionsKt.getIntegerSafe(mediaFormat, MediaFormat.KEY_WIDTH);
+      final Integer height = ExtensionsKt.getIntegerSafe(mediaFormat, MediaFormat.KEY_HEIGHT);
+      final Long duration = ExtensionsKt.getLongSafe(mediaFormat, MediaFormat.KEY_DURATION);
+      final Integer fps = ExtensionsKt.getIntegerSafe(mediaFormat, MediaFormat.KEY_FRAME_RATE);
+      if (width == null || height == null) return false;
+      this.width = width;
+      this.height = height;
+      this.duration = duration != null ? duration : -1;
+      this.fps = fps != null ? fps : 30;
       return true;
       //video decoder not supported
     } else {
diff --git a/library/src/main/java/com/pedro/library/base/FromFileBase.java b/library/src/main/java/com/pedro/library/base/FromFileBase.java
index 8ae321999..68abe3221 100644
--- a/library/src/main/java/com/pedro/library/base/FromFileBase.java
+++ b/library/src/main/java/com/pedro/library/base/FromFileBase.java
@@ -619,14 +619,14 @@ public double getAudioTime() {
   }
 
   /**
-   * @return return duration in seconds. 0 if no streaming
+   * @return return duration in seconds. 0 if no streaming, -1 if can't extract it from file
    */
   public double getVideoDuration() {
     return videoDecoder.getDuration();
   }
 
   /**
-   * @return return duration in seconds. 0 if no streaming
+   * @return return duration in seconds. 0 if no streaming, -1 if can't extract it from file
    */
   public double getAudioDuration() {
     return audioDecoder.getDuration();