diff --git a/source/net/filebot/mediainfo/MediaInfo.java b/source/net/filebot/mediainfo/MediaInfo.java
index 6e0c652d..7cb64a17 100644
--- a/source/net/filebot/mediainfo/MediaInfo.java
+++ b/source/net/filebot/mediainfo/MediaInfo.java
@@ -63,7 +63,7 @@ public class MediaInfo implements Closeable {
 	}
 
 	private boolean openViaBuffer(RandomAccessFile f) throws IOException {
-		byte[] buffer = new byte[64 * 1024];
+		byte[] buffer = new byte[4 * 1024 * 1024]; // use large buffer to reduce JNA calls
 		int read = -1;
 
 		if (MediaInfoLibrary.INSTANCE.Open_Buffer_Init(handle, f.length(), 0) <= 0) {
@@ -77,8 +77,8 @@ public class MediaInfo implements Closeable {
 				break;
 			}
 
-			if (MediaInfoLibrary.INSTANCE.Open_Buffer_Continue_GoTo_Get(handle) != -1) {
-				long gotoPos = MediaInfoLibrary.INSTANCE.Open_Buffer_Continue_GoTo_Get(handle);
+			long gotoPos = MediaInfoLibrary.INSTANCE.Open_Buffer_Continue_GoTo_Get(handle);
+			if (gotoPos >= 0) {
 				f.seek(gotoPos);
 				MediaInfoLibrary.INSTANCE.Open_Buffer_Init(handle, f.length(), gotoPos);
 			}