If a folder contains many MP4 videos that need to be converted to MPEG format all at once, you can use the video conversion feature of HeSoft Doc Batch Tool to complete the task. This article starts with the file changes before and after processing, and explains in detail how to select "Convert Video to MPEG" in the video tool, create a processing list by adding files or importing files from a folder, then verify, set the save location, and start processing, helping users quickly obtain the batch-converted MPG video files.
Many users, when faced with the need to convert video formats, instinctively look for a single-file conversion tool. However, if the requirement changes to "convert all MP4 videos in a folder to MPEG format," single-file tools are no longer efficient. Handling one video at a time means repeating the same operation many times; when there are many files, issues like missed selections, incorrect selections, and disorganized output locations can also arise.
This article addresses the question of "how to batch convert MP4 files in a folder to MPEG" and introduces the method for performing batch video format conversion using HeSoft Doc Batch Tool . This software is an office file batch processing tool, and its advantage lies in consolidating a large number of repetitive file operations into a single workflow. Besides common document processing, the interface also provides video tools, enabling users to batch convert video files to MPEG format.
Applicable Scenarios: Typical Needs for Batch Converting Videos in a Folder to MPEG
Converting a single video to MPEG is not complex; what truly impacts efficiency is the "large quantity." In the following scenarios, batch processing is more suitable than manual, one-by-one conversion.
Unified conversion of a material folder. For example, a project directory contains multiple MP4 clips that need to be submitted uniformly in MPEG format later. Converting them one by one requires repeating the operation for each file; batch processing allows the entire folder to be imported at once.
Historical video archiving. A company's database may have accumulated years of video files, and incompatible formats can hinder later retrieval and playback. Uniformly converting a batch of MP4s to MPG helps form a more standardized archiving structure.
System or device compatibility. Some systems only support MPEG format when importing videos, or certain playback devices are better suited for playing MPG files. Batch conversion in advance can reduce subsequent usage issues.
Improving efficiency for repetitive office tasks. If you frequently need to process videos in a fixed format, using office software like HeSoft Doc Batch Tool can standardize the workflow of "selecting files, confirming the list, setting the output, and starting processing," reducing repetitive labor.
Outcome Preview: Changes in File Extensions Before and After Conversion
First, look at the folder before processing. The screenshot lists multiple video files, all with the .mp4 extension, including "Video test 4.mp4," "Video test 5.mp4," "Video test 11.mp4," "Video test 12.mp4," "Video test 13.mp4," "Video test 14.mp4," "Video test 15.mp4," and "Video test 16.mp4." This indicates that the videos in the current folder have not yet been converted to MPEG format.

Next, look at the result after processing. The video files with the same names are now displayed with the .mpg extension, such as "Video test 4.mpg," "Video test 5.mpg," "Video test 11.mpg," and so on. The main file names remain consistent, while the extension changes from .mp4 to .mpg, indicating that this batch of videos has completed the batch conversion from MP4 to MPEG/MPG format.

This result is very suitable for batch archiving: it unifies the format without destroying the original file name correspondence. When verifying the output files, users only need to compare file names and the number of files to quickly confirm if the conversion is complete.
Operation Steps: Importing Multiple Videos at Once and Batch Outputting MPG
Below, combined with software screenshots, the steps for completing a batch conversion are explained in actual operational order. It is recommended to place the videos to be processed into the same folder—for example, the test directory on the D drive—before starting, making subsequent importing more convenient.
Step One: Open the Software and Go to the Video Tools Page
After launching HeSoft Doc Batch Tool , you can see the function navigation bar on the left. The interface includes entries for Home, Task Flow, All Tools, File Name, Folder Name, File Organization, Word Tools, Excel Tools, PowerPoint Tools, PDF Tools, Text Tools, Image Tools, Video Tools, Audio Tools, and More Tools.
Since the current processing targets are video files, you need to click Video Tools on the left. After entering, various video batch processing functions will be displayed on the right. Note that the software has multiple video conversion options, such as converting to MP4, AVI, MKV, MOV, FLV, WMV, and WebM, so a wrong selection must be avoided.
Step Two: Select "Convert Video to MPEG"
In the video tools list, find and click "12. Convert Video to MPEG". In the screenshot, the description text for this card is "Batch convert video files to MPEG format," which is precisely the function needed to batch convert MP4 to MPEG/MPG.

After completing this step, the software will enter the task page for "Convert Video to MPEG". Choosing the correct function entry is a prerequisite for ensuring the correct output format. If "Convert Video to MP4" or "Convert Video to AVI" is mistakenly selected, the final result will not be the MPEG format required by this article.
Step Three: Use "Add Files" or "Import Files from Folder" to Build the Task List
After entering the task page, you can see two main import entries in the top toolbar: Add Files and Import Files from Folder. Their use cases are slightly different.
If videos are scattered in different locations, you can click "Add Files" to select and add multiple files to the list as needed. If all the MP4 videos are already organized in the same folder, it is recommended to click "Import Files from Folder," which allows the videos within the folder to be batch-added to the pending processing list more quickly.

The list in the screenshot has successfully imported 8 video files. Each row displays a pending file, including sequence number, name, path, extension, creation time, modification time, and operations. The extension column shows mp4, indicating these files are currently MP4 videos; the path column shows the files are located in the test directory on the D drive, making it easy for users to confirm the source.
The bottom summary shows "Record Count: 8." This is information that must be reviewed before batch processing. If you expect to convert 8 videos and the display shows 8 records, the import quantity is basically correct; if the number is inconsistent, you need to check for missed selections, incorrect selections, or the presence of files that do not need processing in the folder.
Step Four: Organize Pending Records, Ensuring Only Required Videos Are Converted
Before starting the batch conversion, it is recommended not to rush to click the next step, but to first check the pending processing list. The more files there are, the more important this check becomes. Confirmation can be done from the following aspects:
Check file names. Confirm that the videos in the list indeed belong to the content that needs conversion this time, and do not add test files, temporary files, or unrelated videos to the task.
Check file paths. Confirm that the paths come from the target folder, avoiding the import of identically named files from a wrong directory.
Check extensions. In the screenshot, the extension column shows mp4, indicating that the current task converts MP4 videos to MPEG format. If videos in other formats are mixed into the list, decide whether to keep them based on your actual needs.
Use filtering, sorting, and deletion. The right side of the interface provides filter and sort buttons to help users quickly view among a large number of records. There is a delete icon in the operation column for each record; if a specific video does not need processing, it can be removed from the list. The clear button at the top is suitable for restarting when there are many import errors.
Step Five: Click "Next" and Set the Save Location for Conversion Results
After confirming the list is correct, click the Next button at the bottom of the page. From the step prompts at the top of the interface, you can see the software processing flow is: "Select records to be processed" -> "Set save location" -> "Start processing". The current screenshot shows the first step; clicking next will lead to the save location settings.
When batch converting videos, it is recommended to set the save location separately. For example, place the output files in a newly created folder instead of mixing them with the original MP4s. This has three benefits: first, it facilitates comparison of files before and after conversion; second, it makes it easier to deliver the converted MPG files uniformly; third, it avoids accidental operations that might affect the source files.
If you need to preserve the original materials for the long term, it is recommended not to delete the original MP4 files. After completing the conversion and confirming the MPG files can be used normally, then archive or clean up according to your company's file management standards.
Step Six: Start Processing to Generate MPEG/MPG Video Files
After completing the save location settings, proceed to the "Start processing" stage. After confirming the task information is correct, execute the processing; the software will perform batch video format conversion based on the pending processing list. During the conversion process, it is recommended to keep the source file locations unchanged, and not to move or rename the videos currently being processed.
Once processing is complete, open the output directory to view the results. According to the outcome screenshot, the 8 MP4 videos have been converted to corresponding MPG files, with the main file names consistent with the originals, and the extension changed to .mpg. This indicates that multiple videos within the folder have been batch converted to MPEG format.
Common Issues and Precautions
1. Is .mpg the MPEG format? In many practical applications, .mpg is a common extension for MPEG videos. The software function is named "Convert Video to MPEG," and the processed files are displayed as .mpg, a result consistent with common usage habits.
2. How many videos can be processed at one time? The example in the screenshot imported 8 videos at once. The actual processing quantity should be arranged considering computer performance, video size, and software operation. When there are many files, processing in batches is advisable to facilitate verification.
3. What if a file I don't want to convert is imported? You can use the delete icon in the list's operation column to remove that record, or click the clear button and re-import. Cleaning up the list before batch processing helps avoid generating useless outputs.
4. Why is it recommended to set a separate output folder? A separate output folder keeps the pre-processing MP4s and post-processing MPGs stored separately, making it easier to check the quantity, compare results, and deliver files, while also reducing the risk of accidental overwriting.
5. How to quickly verify if conversion is complete? You can compare the number of source files with the number of output files, and check if the main file names are consistent and if the extension has changed to .mpg. The example in this article shows 8 corresponding files both before and after processing, indicating a complete conversion.
Summary: Batch Converting to MPEG Makes Folder Video Processing More Efficient
When a folder contains many MP4 videos that need to be converted to MPEG format, the most effective method is not repeated manual conversion, but completing the task uniformly using office software that supports batch processing. HeSoft Doc Batch Tool provides the "Convert Video to MPEG" function. Users simply need to enter the video tools, select the corresponding function, import files or folders, verify records, set the save location, and start processing to obtain batch-converted MPG files.
As shown by the example in this article, multiple MP4 videos are ultimately uniformly converted to MPG format, with file names maintained in a corresponding relationship, facilitating archiving and delivery. If you frequently need to process a large number of videos, images, documents, or other office files, it is recommended to prioritize using batch processing tools, letting the software handle repetitive operations to save time and reduce the manual error rate.