When there are a large number of MP4 videos in a folder that need to have audio extracted, converting them one by one using video software is not only time-consuming but also prone to missing files. This article uses HeSoft Doc Batch Tool as an example to explain how to use the video tools in office software to batch convert multiple MP4 videos into AAC audio files at once. The article includes applicable scenarios, before-and-after effect comparisons, specific operation steps, and precautions, making it suitable for users who need to organize course materials, meeting recordings, short video audio, and material library soundtracks.
In daily office work, content production, and data organization, a common problem often arises: a folder contains many video files, such as course recordings, meeting videos, short-video materials, product demo videos, or collected MP4 clips, but only the audio from them is actually needed. Opening video editing software one by one and exporting the audio individually is not only repetitive but also very time-consuming. This article aims to solve this problem by using the batch processing capabilities of office software like HeSoft Doc Batch Tool to convert many video files into the AAC audio format at once, allowing the sound from the videos to be quickly and independently saved as audio files.
AAC is a common audio format, frequently used on mobile devices, media players, audio asset management, and in some video production workflows. Compared to keeping the video files directly, converting videos to AAC makes the files easier to categorize, transfer, and use later. For users who need to batch extract sound from MP4 videos, using a specialized batch processing tool is more suitable for an office scenario than manual, repetitive conversion.
Applicable Scenarios: When is Batch Video to AAC Conversion Suitable?
Batch converting videos to the AAC audio format is suitable for all scenarios requiring sound extraction from videos when there is a large number of files. For example, a training instructor might record multiple course videos and later need to organize the course audio into separate audio materials; a meeting recorder might need to extract the speech content from meeting recordings for transcription, archiving, or sending to colleagues; a self-media operator might collect numerous short-video materials and need to save background music, narration, or interview audio as AAC files; a corporate data administrator might also need to archive the narration audio from product demo videos separately to reduce the storage space occupied by video files.
If there are only one or two files, manual processing is acceptable; but for dozens or hundreds of videos, the process of repeatedly opening, selecting a format, exporting, and naming significantly reduces efficiency. HeSoft Doc Batch Tool is positioned as an office file batch processing tool that consolidates common file processing needs for videos, audio, documents, etc., into a single software application. Its core value is reducing repetitive work. For tasks like batch video to AAC conversion, users only need to import the files at once, set up the process, and start the processing to obtain the corresponding AAC files.
Result Preview: From Multiple MP4 Videos to Multiple AAC Audios
Before Processing: Multiple MP4 Video Files in the Folder
As seen from the pre-processing preview, the current folder contains several MP4 videos with filenames including Video test 22.mp4, Video test 23.mp4, Video test 24.mp4, Video test 30.mp4, Video test 32.mp4, and Video test 33.mp4. These files all have video thumbnails, indicating they are still video files. If the user only wants to use the audio content, the sound needs to be extracted from the videos.
After Processing: Corresponding AAC Audio Files Generated
After processing is complete, the same batch of materials has been converted into AAC format audio files. The file extensions have changed from .mp4 to .aac, for example, Video test 33.aac, Video test 32.aac, Video test 30.aac, Video test 24.aac, Video test 23.aac, and Video test 22.aac. The main part of the filename is preserved, making it easy for users to identify the audio source based on the original video name. Such results are highly suitable for subsequent unified organization, playback, transcription, or import into other audio processing workflows.
Operation Steps: Using Office Software to Batch Convert Videos to AAC
Step 1: Enter Video Tools, Find the Video to AAC Conversion Function
After opening HeSoft Doc Batch Tool , multiple office processing modules can be seen in the left function category, such as File Name, Folder Name, File Organization, Word Tools, Excel Tools, PowerPoint Tools, PDF Tools, Text Tools, Image Tools, Video Tools, Audio Tools, etc. As this article deals with video files, you need to enter "Video Tools" on the left.
Once in the Video Tools section, the main area displays various batch processing functions related to videos, including separating video frames and audio, removing audio from videos, removing images from videos, adding watermarks to videos, and converting videos to formats like MP4, AVI, MKV, MOV, FLV, WMV, WebM, MPEG, 3GP, OGV, TS, MP3, AAC, and OGG. According to the screenshot, the target function is "17. Convert Video to AAC", indicating this function is used for batch converting video files to the AAC format. Clicking this function card will take you to the batch conversion page.
Step 2: Add the Video Files to be Converted
After entering the "Convert Video to AAC" page, the current function name is displayed at the top, with a "Return to Main Panel" button on the left, and operation entries like "Add Files," "Import Files from Folder," "Clear," and "More" visible on the top right. For a small number of scattered files, you can click "Add Files" to manually select the MP4 videos to convert; for situations where many videos are stored in one folder, "Import Files from Folder" is recommended, as it allows you to import all videos from that folder at once, reducing the trouble of selecting them one by one.
From the list in the screenshot, you can see the software has imported 6 records, with filenames being Video test 22.mp4, Video test 23.mp4, Video test 24.mp4, Video test 30.mp4, Video test 32.mp4, and Video test 33.mp4. The list also shows columns for Path, Extension, Creation Time, Modification Time, and Action. The Extension column shows mp4, indicating these video files have been correctly identified. The summary area at the bottom shows the record count is 6, allowing users to confirm the number of files for this batch process here.
Step 3: Check the Pending List to Ensure Files are Correct
Before starting the conversion, it is recommended to check the pending list. Key points for checking include: whether the filenames are the videos intended for this conversion; whether the paths point to the correct folders; whether the extensions are the video formats needing processing; and whether the record count matches expectations. The Action column on the right side of the list shows a delete icon; if a specific file does not need to be included in this conversion, it can be removed from that row. There is also a "Clear" button at the top of the page, allowing you to clear the list and re-add files if imported incorrectly.
The purpose of this step is to avoid converting unrelated videos together or missing files that need processing. Although batch processing is efficient, its premise is an accurate input list. Especially in office scenarios, a folder might contain test videos, formal materials, and video clips from different projects, so checking the list before conversion can reduce rework.
Step 4: Click Next and Set the Save Location According to the Process
The middle of the page displays three stages in a process flow: Select Records to Process, Set Save Location, and Start Processing. The current screenshot is at the first stage, with a "Next" button at the bottom. After confirming the pending videos are correct, click "Next" to enter the save location setting stage.
The purpose of the save location is to determine where the converted AAC audio files will be placed. In practice, it is recommended to choose a dedicated output folder, such as "AAC Audio Output," "Meeting Audio," or "Course Audio," to avoid mixing them with the original videos and making them difficult to find. If the software process allows selecting a save path, choose a location with sufficient space and a clear path. After file conversion is complete, users can find the generated AAC files in that location.
Step 5: Start Processing and Wait for Conversion to Complete
After setting the save location, continue following the page workflow to the "Start Processing" stage. At this point, the software will batch convert these videos to the AAC audio format based on the imported file list. During processing, users do not need to open videos individually or repeatedly select the output format. The advantage of batch processing lies in applying one setup to multiple records.
After the conversion is complete, go back to the output folder to check the results. Based on the post-processing screenshot, the original MP4 videos have been converted into corresponding AAC audio files, with the extension changed to .aac. Users can quickly match the original videos and exported audio by filename, for example, Video test 22.mp4 corresponds to Video test 22.aac, and Video test 33.mp4 corresponds to Video test 33.aac.
Common Questions and Precautions
1. Do I need to back up video files before batch conversion?
Judging from the screenshot results, AAC audio files are generated after processing, and the original videos serve as the input source. To be safe, it is recommended to keep the original videos for important materials, especially files that cannot be reacquired, such as meeting recordings, course recordings, and project materials. Batch conversion is usually intended to create new audio files rather than replace the original videos, so the original MP4 files are still recommended to be kept.
2. What is the difference between adding files and importing from a folder?
"Add Files" is more suitable for selecting a small number of videos scattered in different locations; "Import Files from Folder" is better for processing a batch of videos within an entire folder. The example files in the screenshot are located in the same test folder, so importing from a folder is more convenient. For batch tasks in daily office work, it is recommended to first gather the videos to be converted into one folder and then import them all at once.
3. Why convert to AAC instead of MP3?
MP3 and AAC are both common audio formats. AAC has good compatibility on many mobile devices, audio/video applications, and in material processing workflows. If your subsequent work requires the AAC format, for instance, some audio material libraries, players, or editing processes require .aac files, then batch converting directly to AAC can reduce secondary transcoding. The software's Video Tools also feature other format conversion functions; users should choose the target format based on actual needs.
4. How are the converted filenames identified?
As seen from the post-processing screenshot, the generated AAC files retain the main body of the original video filename, with only the extension changed to .aac. This naming convention facilitates batch verification, especially when there are many videos, allowing a quick determination of which video each audio file originated from. It is recommended that original videos use clear names before conversion, such as date, project name, course chapter, or meeting topic, so the generated AAC files will also be easier to manage.
5. What should I pay attention to when handling many files?
When converting a large number of files at once, it's advisable to first confirm that the computer has sufficient disk space and avoid setting the output path to a temporary directory as much as possible. For particularly important or very numerous videos, you can test the process with a small number of files first, confirming that the output format and save location meet expectations before batch processing all files. This ensures both efficiency and reduces the impact of operational errors.
Summary: Use Batch Processing Tools to Reduce Repetitive Work in Video to Audio Conversion
Batch converting MP4 videos to AAC audio is essentially a typical office efficiency problem. Although manual processing one by one can get the job done, facing tens or even more videos means repetitive clicking, format selection, and exporting will consume a lot of time. HeSoft Doc Batch Tool organizes these repetitive operations into a clear process: enter Video Tools, select "Convert Video to AAC," import files or a folder, confirm the list, set the save location, and then start processing.
As demonstrated in this article, a batch of MP4 video files becomes a batch of AAC audio files with the same names after processing. For scenarios like organizing course audio, extracting meeting recordings, and archiving short-video sound materials, this batch conversion method can significantly reduce manual operations. Users with similar needs are recommended to prepare the folder of videos to be converted first, then follow the steps in this article, allowing the office software to handle the repetitive file processing tasks, freeing up time for more important content organization and analysis work.