How to uniformly remove the video from multiple videos while keeping the audio? Batch processing method for MP4 with black screen and retained audio

In many office scenarios, only the audio of a video file needs to be retained, and the visual content is no longer needed. This article introduces a method suitable for batch processing: using HeSoft Doc Batch Tool , select "Remove Video Image" in the video tool, import multiple MP4 files at once, uniformly remove the visuals, and retain the audio. The article explains applicable scenarios, effects before and after processing, specific steps, and precautions, helping users avoid the inefficient operation of editing videos one by one. It is more suitable for batch file processing tasks such as meeting recordings, course screen recordings, and interview materials.

If you have a batch of MP4 videos and want to uniformly remove the visuals from all of them while keeping the original audio, the most troublesome part is often not the technique itself, but the "sheer quantity." One video can be processed manually, but a dozen or dozens of videos become repetitive labor: open the file, set the processing method, wait for export, and then move on to the next. For office workers, data administrators, course operators, and content archivists, this kind of work is very time-consuming.

The solution introduced in this article uses the HeSoft Doc Batch Tool shown in the screenshot to complete the "batch deletion of image visuals in videos, keeping only the audio." This is an office software oriented towards batch processing of documents and files, whose core value lies in standardizing and batching repetitive file operation processes. For the need to uniformly remove visuals and retain audio from multiple videos, users do not need to enter editing software one by one; instead, they can complete it in a single batch task.

Applicable Scenarios: Why Remove Video Visuals and Keep Only Audio

In many cases, the visuals in video files are not content that must be retained, and may even need to be hidden or removed. Keeping the audio and deleting the visuals is common in the following office and data processing scenarios.

• Internal Meeting Data Organization: Meeting recordings may contain screen sharing, participant avatars, chat windows, or internal company information. To reduce the risk of visual content dissemination, you can keep only the meeting speech audio.
• Converting Training Videos to Listening Materials: When there are many training course or lecture videos and only the narration needs to be heard later, deleting the visuals still allows them to be used as listening materials.
• Material Desensitization: The shot video contains faces, scenes, brand logos, or other sensitive information, but the audio content still has preservation value.
• Batch Generation of Black-Screen Audio Videos: Some platforms or internal systems still require uploading video-format files, but only need to play the sound. In this case, the video container can be retained, making the visuals display as a black screen.
• Reducing Repetitive Editing Work: When multiple videos require the same de-visualization operation, using a batch processing tool avoids repeated opening and exporting.

It should be noted that the method in this article is not converting videos to MP3, nor is it extracting audio files separately, but rather deleting the original image visuals from the video file so that only audio is heard during playback. For scenarios where the MP4 video file format still needs to be retained, this method is more direct.

Effect Preview: The Differences Before and After Processing

To avoid misunderstandings before operation, let's first look at the actual effect through screenshots of pre- and post-processing. This will also make it clearer to judge whether the processing was successful when checking the results later.

Before Processing: Video Thumbnails and Player Both Have Visuals

Before processing, you can see multiple video thumbnails in the folder, with each MP4 file displaying different visual content. After selecting a video, the dynamic image is also visible in the player. For example, in the screenshot, the selected file, Video test 22.mp4, shows a golden fragment image in the player.

This indicates that the video before processing contains both an image track and an audio track. If these visuals are not suitable for continued retention, or if only the audio is needed later, you can use the batch deletion of images for uniform processing.

After Processing: Thumbnails Turn Black, Only Audio Remains During Playback

After processing, the thumbnails of the multiple videos in the folder all turn black. When a video is opened for playback, the player's visual area is also a black screen, but you can see the progress bar is still moving. This state means the original visuals are no longer displayed, the video is still playable, and the audio content has been preserved.

If your goal is "cannot see the video visuals, but can still hear the original audio," then this processing result meets expectations. For scenarios like batch video desensitization, meeting data archiving, or audiobook-style course conversion, this effect is very practical.

Operation Steps: Batch Deleting Video Images and Keeping Audio

The following explanation follows the order shown in the software interface screenshots. The entire process centers on "Select Function — Import Files — Confirm Records — Continue Processing," suitable for users using this function for the first time.

Step 1: Enter the Video Tools Category in HeSoft Doc Batch Tool

After opening HeSoft Doc Batch Tool , first look at the function categories on the left side. The left side in the screenshot contains multiple office file processing entries, 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.

Since the files to be processed this time are video files, click "Video Tools" on the left. After entering, the main area will display batch processing functions related to video. This categorization method aligns with the usage habits of office software: first locate the tool by file type, then select the specific processing action.

Step 2: Select "Delete Image from Video"

On the Video Tools page, you can see multiple card-style functions. Related to the requirement of this article is the 3rd item: "Delete Image from Video". The description below this function is "Batch delete image visuals in videos, keeping only audio," which corresponds to the "remove video visuals and keep audio" requirement.

Please be careful not to choose the wrong function. The page also has "Delete Audio from Video," which removes audio and keeps visuals; and "Separate Video Image and Audio" is more about splitting the visuals and audio. This article aims to keep the audio, so you should select "Delete Image from Video."

After clicking this function card, you will enter its batch processing page.

Step 3: Add the MP4 Video Files to Be Processed

After entering the "Delete Image from Video" page, the top of the interface provides file import entries, including "Add Files" and "Import Files from Folder". These two entries can be selected based on how the files are organized:

1. If videos are scattered in different locations, you can click "Add Files" to select multiple files as needed.
2. If all videos are already placed in the same folder, you can click "Import Files from Folder" to import videos from the folder at once.

Before batch processing, it is recommended to first gather the videos to be processed into a dedicated folder, such as "Videos to De-Visualize." This makes it more convenient when using "Import Files from Folder" and also reduces the probability of missing or misselecting files.

As seen in the screenshot, 6 video files have been imported, all with the extension mp4. The list shows information such as file name, path, extension, creation time, and modification time. The summary at the bottom shows "Record Count: 6," indicating these 6 videos will all enter the subsequent batch processing flow.

Step 4: Check the File List and Exclude Videos Not Needing Processing

The advantage of batch processing is handling multiple files at once, but precisely for this reason, pre-processing verification is very important. After importing files, it is recommended to focus on checking the following items:

• Name: Confirm whether the file name is within the scope of this processing task.
• Path: Confirm whether the file source is the target folder, avoiding importing videos from other projects.
• Extension: The screenshot shows mp4, indicating the currently imported files are MP4 videos.
• Record Count: The record count at the bottom should match the actual number of files prepared for processing.
• Operation Column: If a file does not need to be processed, it can be removed from the list via the delete icon in the right operation column.

The purpose of this step is not to add operational burden but to avoid batch processing mistakes. Especially for important files like meeting records, client materials, and course content, confirming the list before processing can reduce rework.

Step 5: Click "Next Step" to Enter the Save Location Settings

After confirming the processing records are correct, click the "Next Step" at the bottom of the page. From the interface flow, you can see the software divides the task into three stages: Step 1 "Select Records to Process," Step 2 "Set Save Location," and Step 3 "Start Processing." This flow is suitable for batch file processing because it gives users the opportunity to check and set the output location.

In the save location setting stage, it is recommended to choose an independent output directory, not mixing with the original videos. For example, you can create new folders like "Visuals Deleted," "Black Screen with Audio," or "Processed Videos." This way, after processing, you can quickly distinguish original files from result files, and it's also convenient for subsequent spot checks.

Since the provided screenshots do not show the detailed button names on the save location page, just follow the prompts on the software's current page to complete the save path selection during actual operation. The key points are to ensure the output location is clear, has sufficient disk space, and does not overwrite important original materials.

Step 6: Start Processing and View the Output Results

After the save location is set, enter the "Start Processing" stage. The software will batch delete the video image visuals according to the records in the list and generate the processed files. The processing time usually relates to the number of videos, video duration, file size, and computer performance.

After processing is complete, open the output folder to view the results. Focus on checking the following:

• Whether the number of output files matches the imported record count;
• Whether the files can be opened normally;
• Whether the visual display has become a black screen or has no image during playback;
• Whether the audio can still be heard normally;
• Whether the file names are easy to identify and archive later.

If processing a large number of videos, you don't necessarily need to play each one fully, but it is recommended to at least spot-check a few from different sources or of different durations to ensure the processing rules meet expectations.

Frequently Asked Questions and Precautions

1. What is the difference between "Delete Image from Video" and "Convert Video to MP3"?

Deleting the image from a video means the video no longer shows its original visuals, but the file can still be played as a video, with the audio retained. Converting to MP3 generates a pure audio file, differing in file format and usage. If your system or workflow still requires video files like MP4, you can choose to delete the image; if only audio files are needed, you should select audio conversion or extraction functions.

2. Why are the thumbnails black after processing?

Because the original video image visuals have been deleted or are no longer displayed, the file thumbnails become black. In the post-processing effect image, multiple video thumbnails all show a black screen, which is a normal phenomenon consistent with the goal of "keeping only audio."

3. Can many videos be processed at once?

As seen from the operation interface, the software supports adding multiple files and importing files from a folder, which is the core value of batch processing. The actual processing quantity can be arranged according to computer performance, video size, and task requirements. For very large tasks, it is recommended to process in batches to facilitate result checking.

4. Is it necessary to organize folders before processing?

Organization is recommended. Placing the videos to be processed into the same folder can reduce confusion when selecting files and also facilitates subsequent use of "Import Files from Folder." If video files come from complex sources, you can group them by project or date first to avoid mixing files from different tasks.

5. How to avoid mistakenly processing original videos?

It is recommended to keep a backup of the original files and save the output results to a new folder. Although batch processing is efficient, traceability must be maintained. For important materials, you can first select 1 to 2 videos for testing; after confirming the black-screen-audio-only effect is correct, then batch process all files.

6. Why is this an office efficiency tool rather than a traditional editing workflow?

Traditional video editing emphasizes fine editing of individual assets, whereas the requirement here is to perform a uniform action on multiple files. HeSoft Doc Batch Tool , as office software, is more suitable for such standardized, repetitive file processing tasks. What users care about is not complex editing effects, but completing the same type of operation on a large number of files quickly and stably.

Summary: Uniformly De-Visualize Multiple Videos, Batch Processing Saves More Time

Uniformly removing visuals and keeping audio from multiple videos is a typical batch file processing requirement. Using HeSoft Doc Batch Tool , you can select "Delete Image from Video" under Video Tools, import multiple MP4 videos at once via "Add Files" or "Import Files from Folder," and then follow the workflow to set the save location and start processing. The processed files no longer show the original visuals during playback, but the audio remains.

Compared to opening video editing software file by file, this method is more suitable for office scenarios like meeting data organization, course recording archiving, interview material desensitization, and batch black-screen audio-only processing. It reduces the time cost of repetitive clicking, repetitive exporting, and manual checking, allowing users to focus their energy on material management and result verification.

If you are facing a batch of video files whose visuals need to be hidden but whose audio must be preserved, it is recommended to first gather the MP4 files to be processed into a single folder, then follow the steps in this article to use the "Delete Image from Video" function for batch processing. Conduct a small-scale test first, then execute in batch mode, which can significantly improve processing efficiency while ensuring the safety of the results.