When there are a large number of MP4, MOV, AVI, and other videos in a folder that need to be uniformly converted to FLV format, opening conversion software one by one is very time-consuming and prone to missing files. This article uses HeSoft Doc Batch Tool as an example to demonstrate how to import multiple video files at once and batch convert them to FLV format using the video tools in office software, helping to reduce repetitive operations in scenarios such as content operations, organizing teaching materials, and archiving website resources, thereby improving file processing efficiency.
In daily office work and content management, inconsistent video file formats are a common issue. For example, a material folder may contain multiple MP4 videos at the same time, while subsequent systems, web players, historical projects, or archiving specifications require the unified use of the FLV format. If you convert them manually one by one, the operation is not only repetitive but can also lead to problems such as missed files, naming confusion, and inconsistent save locations. This article addresses the practical need of "how to batch convert many video files to FLV format".
The following tutorial will combine screenshots to demonstrate how to use HeSoft Doc Batch Tool to complete the batch video to FLV conversion. It is an office-oriented batch file processing software that, in addition to common document, spreadsheet, PDF, and image file processing, also provides video format conversion tools. For users who need to process dozens or hundreds of video files at once, batch import, unified conversion, and centralized output can significantly reduce repetitive work.
Applicable Scenarios: When Do You Need to Batch Convert to FLV Format
FLV was once widely used in web video playback, streaming media distribution, and video compatibility scenarios for some legacy systems. Although MP4 is more common now, in actual work, you may still encounter situations where you need to uniformly convert videos like MP4, AVI, MOV, MKV, WMV, etc., to FLV. For example, website maintenance personnel need to supplement video materials for old pages, the training department needs to submit FLV files according to platform requirements, the content team needs to reorganize historical materials into a specified format, or the project deliverer explicitly requires the video file extension to be .flv.
If the number of files is very small, manual conversion is acceptable; but when there are many videos in a folder, such as the multiple files shown in the screenshot like Video test 20.mp4, Video test 22.mp4, Video test 23.mp4, individual processing becomes inefficient. More importantly, batch tasks usually require that file names maintain a corresponding relationship; before processing it is Video test 20.mp4, and after processing it should yield Video test 20.flv. This makes subsequent searching, comparison, and delivery clearer.
The value of HeSoft Doc Batch Tool lies in centralizing these repetitive steps into one workflow: first select the "Convert Video to FLV" function, then batch add the video files that need processing, confirm the list, and then proceed to set the save location and start processing. The entire process is suitable for office users who have no complex video editing needs and just want to quickly unify formats.
Result Preview: Before Processing, There Are Multiple MP4 Video Files
From the before-processing screenshot, you can see that there are multiple video clips in the current folder, all with the .mp4 file extension. The file names include Video test 20.mp4, Video test 22.mp4, Video test 23.mp4, Video test 24.mp4, Video test 30.mp4, Video test 31.mp4, Video test 32.mp4, Video test 33.mp4, Video test 51.mp4, etc. If these materials need to be converted one by one, it involves repeatedly adding files, selecting an output format, waiting for conversion, and saving the results.

Before batch processing, it is recommended to first place all the videos to be converted in the same folder, which makes it more convenient when using "Import files from folder". If the videos are scattered in multiple directories, you can also add them in batches via "Add files". To avoid subsequent confusion, it is best to confirm that there are no duplicate file names, the files themselves can be opened normally, and there is enough disk space to save the converted FLV files.
Result Preview: FLV Files Are Generated Uniformly After Processing
The after-processing screenshot shows that the original multiple MP4 videos have been converted to FLV format, with the main part of the file names kept consistent, only the extension changed to .flv. For example, Video test 20.mp4 corresponds to the generated Video test 20.flv, Video test 22.mp4 corresponds to Video test 22.flv, Video test 51.mp4 corresponds to Video test 51.flv. Such a result facilitates a one-to-one correspondence with the original files and is also convenient for subsequent uploading, archiving, or delivery.

For batch conversion tasks, the correspondence of file names is very important. Uniformly retaining the main part of the original file name can reduce the workload of manual renaming and lower the risk of placing videos in the wrong location or delivering incorrect versions. Especially when video materials come from multiple courses, product introductions, or project milestones, keeping naming consistent makes subsequent management more efficient.
Operation Step 1: Enter Video Tools and Select "Convert Video to FLV"
After opening HeSoft Doc Batch Tool , you can see multiple tool categories in the left navigation bar, such as File Name, Folder Name, File Organization, Word Tools, Excel Tools, PowerPoint Tools, PDF Tools, Text Tools, Image Tools, Video Tools, etc. Since this task involves batch converting video formats, you need to first enter "Video Tools".
On the Video Tools page, you can see multiple video format conversion functions, including "Convert Video to MP4," "Convert Video to AVI," "Convert Video to MKV," "Convert Video to MOV," "Convert Video to FLV," "Convert Video to WMV," "Convert Video to WebM," etc. According to this goal, you need to click "Convert Video to FLV". The description on this function card in the screenshot is "Batch convert video files to FLV format," which fully matches the requirement of this article.

The purpose of this step is to enter the correct batch processing function module. The expected result is that the software opens the "Convert Video to FLV" task interface, rather than entering another format conversion function. It is important to pay special attention here: if you mistakenly click "Convert Video to MP4" or "Convert Video to AVI", the final output format will be different, so you should confirm the card name before entering the function.
Operation Step 2: Add the Video Files to be Converted
After entering the "Convert Video to FLV" interface, the function name will be displayed at the top of the page, with "Return to Main Panel" on the upper left, and buttons like "Add Files", "Import Files from Folder", "Clear", "More" on the right. The middle area is the pending record list, which lists information such as Sequence Number, Name, Path, Extension, Creation Time, Modification Time, and Operations.

If only a few scattered files need to be converted, you can click "Add Files" to select one or more video files from the computer and add them to the list. If the video files are already gathered in a specific folder, it's more suitable to click "Import Files from Folder", as this reduces the time spent picking files one by one. From the screenshot, you can see that multiple MP4 files have been imported into the list, the Extension column shows mp4, and the Path column shows these files come from the same test folder.
The purpose of this step is to add all the videos that need batch conversion to FLV into the pending list. The expected result is that every file to be converted appears in the table, and information such as name, path, and extension is visible. After importing, it is recommended to quickly check the list: confirm the number of files is correct, whether there are any videos not intended for conversion, and if there are any duplicate files. If you find mistakenly added files, you can click the delete icon in the "Operations" column of the corresponding row to remove them; if you want to re-select files, you can use the "Clear" button to clear the current list and then re-import.
Operation Step 3: Check the Record List and Proceed to the Next Step
When batch processing video files, checking the list is a very critical step. In the screenshot, the software is at the first step "Select the records to process", and a "Next" button is visible at the bottom. Do not rush to continue at this point; it's recommended to first confirm the following: first, all files in the list are videos that need to be converted to FLV; second, whether the extensions column meets expectations, for example, all are mp4 in the current example; third, whether the paths point to the correct folders to avoid selecting similar directories by mistake; fourth, whether the file names are clear for identification after conversion.
Buttons like "Filter" and "Sort" are also shown on the right side of the page, which can be used to assist in reviewing the list. For instance, when many files are imported, sorting makes it easier to check the records. There is no need to set complex configurations for the video content here; just ensure the pending records are accurate. After confirming there are no errors, click the "Next" button at the bottom to enter the subsequent save location setting phase.
The purpose of this step is to reduce errors before the formal conversion. The advantage of batch processing is handling many files at once, but it also means that if the initial selection is wrong, it might output a lot of unwanted results at once. Therefore, spending a few dozen seconds checking the list often saves more time than re-converting later.
Operation Step 4: Set the Save Location and Start Processing
From the interface process bar, you can see that this function includes three stages: "Select records to process," "Set save location," and "Start processing". After completing the file selection, continue by following the software prompts to set the save location for the converted FLV files. It is generally recommended to save the output files in a separate, new folder, such as "FLV Output," "Converted Videos," or a delivery directory corresponding to the project. This prevents the original MP4 files from mixing with the newly generated FLV files, making checking and backing up easier.
After setting the save location, proceed to the "Start processing" stage to execute the conversion. During the batch conversion process, it is recommended not to move or delete the original video files, nor to close the software window. Video conversion is usually more time-consuming than ordinary document processing, and the specific duration is affected by the number of videos, file sizes, computer performance, and disk read/write speeds. If you import many high-definition videos at once, allow sufficient time for the task to complete.
After processing ends, open the save directory and check if the corresponding .flv files have been generated. You can focus on verifying whether the file count, file names, and extensions meet expectations. For important projects, it is advisable to spot-check whether a few converted videos can play normally before proceeding with uploading, archiving, or delivery.
Frequently Asked Questions and Precautions
1. Will batch conversion change the original file names? From the effect screenshots, you can see that the processed FLV files retain the main part of the original video file names, with only the extension changing from .mp4 to .flv. This method is conducive to maintaining a clear correspondence between the before and after. In actual use, it is still recommended to check the file names in the output directory to ensure the conversion results meet the project requirements.
2. Can I import an entire folder at once? The operation interface provides the "Import Files from Folder" button, suitable for batch adding videos from a specific directory to the processing list. For centrally stored video materials, this is more efficient than clicking "Add Files" one by one.
3. What if I import a file I don't want to convert? Each row on the right side of the list has an operation area, and a delete icon is visible in the screenshot. If you find mistakenly selected files, you can remove them from the list before proceeding to the next step. You can also use "Clear" to start the selection over again.
4. Why is it recommended to set a separate output folder? Batch conversion generates multiple new files. If output directly to the original directory, MP4 and FLV files might mix, making it easy to make mistakes during later checks. Saving the conversion results separately makes it more convenient to confirm the quantity and easier to package for delivery.
5. What preparations should be made before video conversion? It is recommended to first confirm that the original videos can play normally and the files are not occupied by other programs; also, check if there is sufficient disk space. Video files are usually large in size; if batch converting a large number, the disk where the output directory is located needs to have enough free space reserved.
Summary: Using Batch Processing Tools to Reduce Repetitive Work in Video Format Conversion
Batch converting multiple video files to FLV format is essentially a typical office efficiency problem: the task itself is not complex, but it involves many repetitions and is prone to errors. Using HeSoft Doc Batch Tool , you can string together "Select function, Batch Import, Check List, Set Save Location, Start Processing" into a clear workflow, avoiding manual conversion of files one by one.
If you currently need to uniformly convert a large number of MP4 videos to FLV, it is recommended to organize the source folder first, then follow the steps in this article to enter "Video Tools" and "Convert Video to FLV", use "Add Files" or "Import Files from Folder" to bulk add videos, confirm the list is correct, and then proceed with processing. This not only saves time but also makes the output results more standardized and easier to manage.