diff --git a/src/api/ffmpeg.ts b/src/api/ffmpeg.ts
index b5a830f01..6f282d0da 100644
--- a/src/api/ffmpeg.ts
+++ b/src/api/ffmpeg.ts
@@ -8,8 +8,10 @@ export async function runFFmpegCmd(
 ) {
     let inputFilePath = null;
     let inputFileData = null;
-    if (inputFile instanceof File) {
+    let inputFileName = null;
+    if (!inputFile.path) {
         inputFileData = new Uint8Array(await inputFile.arrayBuffer());
+        inputFileName = inputFile.name;
     } else {
         inputFilePath = inputFile.path;
     }
@@ -18,6 +20,7 @@ export async function runFFmpegCmd(
         cmd,
         inputFilePath,
         inputFileData,
+        inputFileName,
         outputFileName
     );
     return new File([outputFileData], outputFileName);
diff --git a/src/utils/ipcComms.ts b/src/utils/ipcComms.ts
index 67ebed060..9baa2c38a 100644
--- a/src/utils/ipcComms.ts
+++ b/src/utils/ipcComms.ts
@@ -131,7 +131,7 @@ export default function setupIpcComs(
         'run-ffmpeg-cmd',
         (
             _,
-            cmd: string[],
+            cmd,
             inputFilePath,
             inputFileData,
             inputFileName,