This article focuses on video footage organization and office batch processing scenarios, explaining how to batch split multiple MP4 videos into silent videos and independent audio tracks. Using the video tool in HeSoft Doc Batch Tool , users can select "Separate video and audio from video," import multiple video files, set the audio format to mp3, aac, opus, or ogg, then save and start processing, thereby quickly completing the audio-video separation of a large number of video clips.
As video footage grows, the cost of organization increases significantly. A project folder might contain multiple MP4 videos such as seaside scenes, forest shots, event footage, and interview clips, with each file containing both video and audio. During post-production, editors may only need the video; copywriters may only need the audio for dictation; and archivists may wish to save the video and audio separately for easier long-term storage.
If you manually export audio and then generate a silent version for each video, the workload is substantial. Especially when there are many videos with similar file names, it's easy to miss exports, create duplicate exports, or mismatch audio and video files. This article introduces a method better suited for office batch processing: using HeSoft Doc Batch Tool to batch split multiple MP4 videos into silent video files and audio files.
This software is positioned as an office tool, focusing on batch file processing to help users reduce repetitive tasks. It includes categories for documents, spreadsheets, PDFs, images, and also provides video tools and audio tools. For a task like "batch separating video and audio from many video files," using a dedicated batch processing entry point is more efficient than processing files one by one.
Applicable Scenarios: Why Batch Demux Video and Audio
The first scenario is processing course and meeting materials. Screen recordings, online meetings, and training videos contain a large amount of speech information. Users might need to extract the audio as MP3 for transcription, content review, or creating audio materials; meanwhile, the video file still needs to be kept for later subtitle addition or re-editing.
The second scenario involves managing short videos and footage libraries. Raw footage often includes on-site ambient sound, but the final edit might be re-scored or dubbed. By batch separating the original footage into silent videos and audio files, editors can use the video alone or keep the original audio as reference material.
The third scenario is archiving and content repurposing. For files like event records, interview videos, and product demo videos, splitting audio and video makes retrieval easier. For example, the audio can be given to transcriptionists by topic, while the video can be handled by a visual team. Batch demuxing allows the same group of videos to serve multiple workflows simultaneously.
Result Preview: From a Batch of MP4s to Groups of Audio and Silent Video
The image below shows the file state before processing. As you can see, there are multiple MP4 video files in the same directory, named Video test 18.mp4, Video test 19.mp4, Video test 22.mp4, Video test 23.mp4, Video test 24.mp4, and Video test 30.mp4. At this point, each file is still a complete video; the audio and video have not been split yet.
After processing is complete, the output directory contains multiple folders named after the original videos. In the example, opening the Video test 19 folder reveals two files: Video test 19.mp3 and Video test 19.mp4. Based on the tool's functionality, the MP3 is the audio separated from the original video, and the MP4 is the corresponding silent video.
This output structure is very user-friendly for footage management. Each piece of footage is independently placed in a folder of the same name, meaning audio and silent video do not need to be manually paired by the user. In the future, if you need to find the audio for Video test 19, simply go to the Video test 19 folder; if you need its silent video, the corresponding MP4 is in the same location.
Step 1: Select the Video-Audio Demux Function in Video Tools
After launching HeSoft Doc Batch Tool , click Video Tools in the left navigation pane. In the screenshot, Video Tools is selected, and various batch video processing functions are shown on the right. The first item is the one needed for this task: Separate video and audio.
The description for this function reads "Batch split video files into silent video and audio files." This indicates two key pieces of information: first, it supports batch processing of video files; second, the processing result includes both a silent video and an audio file. Users who need to split MP4s into video and audio components should select this option.
The interface also lists other video tools, such as Remove audio from video, Remove image from video, Video to MP4, Video to AVI, Video to MKV, Video to MOV, etc. When choosing a function, it's important to differentiate: if you just need to remove the audio, choose Remove audio; if you need to obtain both an audio file and a silent video, select "Separate video and audio."
Step 2: Add the MP4s to be Split into the Processing List
After entering the function page, the first step is "Select records to process." The top right of the interface has buttons for Add Files and Import Files from Folder. These two entry points suit different situations: the former is for picking files from multiple locations, and the latter is for importing all videos from a specific folder at once.
In the screenshot, 6 MP4 files have been imported, and the list displays information such as serial number, name, path, extension, creation time, and modification time. For batch tasks, this list is very important as it acts as a processing manifest. Users need to confirm that each record is a video to be split, that the extension is mp4, and that the path comes from the correct footage folder.
If a file does not need to be processed, it can be removed using the delete icon in the operations column. If the entire list is incorrect, you can click "Clear" at the top and re-import. After checking, click Next at the bottom. The expected outcome of this step is that all videos to be processed are in the list, and the quantity, names, and paths are confirmed to be correct.
Step 3: Set the Audio Output Format
The second step is "Set processing options." The page shows "Audio format," with options including mp3, aac, opus, ogg. MP3 is selected in the example interface.
It is recommended to choose the format based on actual use. MP3 is suitable for most office and footage management scenarios, with strong compatibility for playback, sending, uploading, and transcription. AAC is also common in some audio/video workflows; opus and ogg can be chosen based on specific platform or project requirements. Since the post-processing results in the screenshot contain Video test 19.mp3, the example task used MP3 audio output.
Note that this step is only for setting the format of the extracted audio file and does not mean converting the original video into an audio format. The final result will still consist of an audio file and a video file. After making the selection, continue by clicking "Next."
Step 4: Set the Save Location and Start Generating Result Files
The wizard header shows that step 3 is "Set save location" and step 4 is "Start processing." Although the screenshot does not show the specific content of these two pages, it's clear from the process that the user needs to continue following the wizard to set the output directory and then start the batch processing.
It is recommended to set the save location to a separate results folder, such as a "Demux Results" directory within the project folder. This keeps the original MP4 files undisturbed and makes it easy to centrally check the completed results. For formal projects, it's best not to scatter the output results across multiple directories, as this will increase the cost of searching later.
After starting the processing, the software will perform video-audio demuxing for each video according to the import list. Once processing is finished, check the results in the save location. According to the result images, the output will have folders created using the original video names, with the corresponding audio and silent video saved inside. Users can spot-check a few files to confirm that the audio plays correctly and the video can be opened normally.
FAQ and Notes
1. How to avoid file mismatch errors when processing many videos?
It is recommended to use a single output directory and keep the result structure generated by the software using the original video names. In the result images, each folder is named after the original video, which helps keep the audio and silent video aligned.
2. What if I only want MP3 files and not the silent video?
The function introduced in this article is "Separate video and audio," which generates both audio and silent video. If you only care about the audio, you can use the MP3 files from the results; deciding whether to delete other output files depends on your own archiving rules.
3. Why should I check the import list first?
The efficiency of batch processing comes from one-time execution, but the risk is that if the wrong files are selected, errors will be produced in batch. Checking the names, paths, and extensions after importing can help preemptively eliminate problems.
4. How to choose between mp3, aac, opus, and ogg?
Choose mp3 if there are no special requirements. It is universally compatible with office computers, mobile phones, media players, and common transcription tools. Other formats are suitable for situations with specific project requirements.
5. Which video formats is this method suitable for?
The example processed MP4 files, and the extensions in the interface list were mp4. For other formats, compatibility should be based on the software’s actual support and import status. It is not recommended to mix and directly process a large number of different formats without understanding their compatibility.
Summary: Enhancing Footage Organization Efficiency with Batch Demuxing
Splitting multiple MP4 videos into silent video and MP3 audio is a common task in video footage management, course material organization, meeting content extraction, and preparation for post-production editing. Manual, one-by-one processing is not only slow but also prone to naming confusion and omissions.
Using HeSoft Doc Batch Tool , users can select "Separate video and audio" in the Video Tools, batch import MP4 files, set the audio format, choose a save location, and start processing. The final results are categorized by the original video name, with audio and silent video files corresponding one-to-one, making it more suitable for batch file management in office scenarios. If you are currently processing a batch of video footage, it is recommended to organize the source folder first, then follow the process in this article to perform batch demuxing, completing more file processing work with fewer repetitive operations.