---
title: "Media conversion issues"
slug: "vodstation-troubleshoot-encoding"
updated: 2026-09-17T09:22:39Z
published: 2026-09-17T09:22:39Z
canonical: "guide.ncloud-docs.com/vodstation-troubleshoot-encoding"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://guide.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Media conversion issues

Available in Classic and VPC

You might run into the following problems when using VOD Station. Find out causes and possible solutions.

## Error message: "UPLOAD_ERROR"

While converting media files, I received the error message "**UPLOAD_ERROR**" in the Status menu.

#### Cause

An error occurred while uploading the encoded output video file to the output file path.

#### Solution

Check if the output file path specified in the category exists and try again.

## Error message: "DOWNLOAD_ERROR"

While converting media files, I received the error message "**DOWNLOAD_ERROR**" in the Status menu.

#### Cause

The source video file in the Object Storage bucket was modified or deleted during encoding.

#### Solution

Check that the source file exists in the Object Storage bucket. If the file does not exist, upload it again.

## Error message: "FILE_NOT_FOUND"

While converting media files, I received the error message "**FILE_NOT_FOUND**" in the Status menu.

#### Cause

The selected source video file does not exist in Object Storage.

#### Solution

- Check that the source file exists in the Object Storage bucket.
- Upload the source file again to the Object Storage bucket or select a different file.

## Error message: "FILE_ALREADY_EXISTS"

While converting media files, I received the error message "**FILE_ALREADY_EXISTS**" in the Status menu.

#### Cause

A file with the same name exists in the Object Storage bucket set as the output file path.

#### Solution

In the **Encode new file** window, rename the file with the same name in the Object Storage bucket set as the output file path.

## Error message: "WRONG_INPUT_FILE"

While converting media files, I received the error message "**WRONG_INPUT_FILE**" in the Status menu.

#### Cause

You have used a file format not supported by VOD Station.

#### Solution

Use video file formats that are supported by VOD Station. See [Service specifications](/docs/en/vodstation-vodstationprep#%EC%84%9C%EB%B9%84%EC%8A%A4%EC%82%AC%EC%96%91) for supported file specifications.

## Error message: "TRANSCODING_ERROR"

While converting media files, I received the error message "**TRANSCODING_ERROR**" in the Status menu.

#### Cause

- The source video file properties are not common and cannot be converted.
- The source video file header cannot be extracted, or the duration is abnormal.

#### Solution

- . Use a program that can check video file properties, such as MediaInfo, to verify that the file is in a file format supported by the VOD Station service and that the header duration and video/audio duration are the same. See [Service specifications](/docs/en/vodstation-vodstationprep#%EC%84%9C%EB%B9%84%EC%8A%A4%EC%82%AC%EC%96%91) for supported file specifications.
- If you have difficulty identifying the cause, contact [Customer Support](https://www.ncloud.com/support/question/service) on the NAVER Cloud Platform portal.

## Automatic encoding error

The same MP4 file was encoded manually and automatically, but only the manual encoding was successful.

#### Cause

If the input file name automatically encoded by the Cloud Functions service has no extension or an unsupported extension, the encoding fails.

#### Solution

Check the Cloud Functions source code to ensure that the input file name has the correct extension.

              Note

              

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