Looking for a FLV-to-MP4 converter?

Try Movavi Video Converter!
  • Lightning-fast conversion
  • Batch processing of files – any number, any size
  • No quality loss, even with 4K videos
  • Easy editing and compression

Download the program and follow the instructions below

How to Change FLV to MP4

Edited by Pat Bitton

January 27, 2020

Even though HTML5 is gradually replacing FLV (Flash Video) as the standard for streaming media over the Internet, FLV is still used by over one billion people worldwide for embedded video and on social networks such as Facebook or YouTube. However, to be played on a PC or Mac, FLV requires that you install additional codecs, and many mobile devices don't support this format at all. So if you want to watch a video you've downloaded from the Web on your computer or mobile device, make sure to convert the video to a more universal format such as MP4 or MPEG-4. Movavi Video Converter will help you get this done in no time.

How to Convert FLV to MP4 with the Movavi Converter

With Movavi Video Converter, you can change the format of your video, audio, or image files in one click! No need for any special knowledge of media formats – just run the software, open a movie or video clip, select a ready-made preset, and start the conversion. Follow the simple steps below to learn how to convert FLV to MP4.

Install the FLV-to-MP4 Converter on Your Computer

Download and run the installation file for Movavi Video Converter. Follow the instructions on the screen to install the program.

Add the Video Files You Want to Convert

To add video files for conversion, click the Add Media button in the upper left corner of the interface, then choose Add Video, and select the files you want to convert.

Edit the Uploaded Files (Optional)

Before conversion, you can make changes in the files you’ve added via the built-in editing tool. To access it, click the Edit button in the file description.

Among the tabs in the new window, choose Stabilization to reduce shakiness in your videos. Choose Audio to reduce background noise or otherwise alter the sound volume in the files. Open the tab Adjustments to change the parameters of brightness, saturation, contrast, and others. Choose from a library of creative filters in the Effects tab and apply them to your clips. In the tabs Subtitles and Watermark, you can insert upload subtitles or add a watermark, respectively. Choose either Trim, Crop, or Rotate to get rid of unwanted details, cut away the edges of your videos, or rotate the footage.

Compress the FLV Files (Optional)

You can reduce the size of particular large files by using the converter. Click the file size value in the description section. In the box that opens, select the desired quality, bitrate, and size values. Click the Convert sample button to convert a small fragment of your file and check out the quality.

Set MP4 as the Output Format

Click the Video tab. Choose the MP4 preset group, then the appropriate preset. If you want to transform FLV into MP4 for compatibility with your mobile device, click the Devices tab and then locate your device model.

Start Converting FLV Files to MP4

Converted files are saved to the Movavi Library folder by default. To change the output folder, click Save to. After you have specified all the required settings, click Convert and wait for the conversion to be completed.

Upload Video to Your Mobile Device

The folder with converted files will automatically open as soon as conversion is finished. Now you can transfer the converted files to your mobile device. Turn on the device and attach it to your computer. Launch the uploading software on your device and follow the instructions or, depending on the device, transfer files to the target folder.


Movavi Video Converter

The ideal way to get your media in the format you need!

  • Convert video, audio, DVDs, and image files
  • Enjoy lightning-fast conversion without quality loss
  • Improve quality, adjust sound, trim and join files before converting
  • Save video and audio clips for easy mobile access

Differences between Desktop and Online Converters

Online Video Converter
  • Long-time wait
  • Limited file size
  • Popular formats supported
  • Slow conversion speed
Movavi Video Converter
  • 0-second wait
  • No size limits
  • 180+ formats, presets for 200+ devices
  • Fast conversion
  • Online user support

How to Convert FLV to MP4 Online

If you’d rather not install anything, or you don’t want to download software for just one task, consider using an online converter. Here’s how to convert FLV to MP4 online.

Go to the Conversion Site via the Link Below

Click the link below to go to the online converter home page:


Add Your FLV File

Upload your file: click the Add Your Media button and choose the file for conversion. Please note that the service has a couple of limitations – file size is limited, and you can only convert one file at a time. If you have multiple files, you’ll need to convert them one at a time.

Perform the Online Conversion

Click Convert to start the process. After the conversion is complete, hit the Download button to retrieve your new MP4 file or wait for the download to start automatically.

FLV vs. MP4 Comparison

FLV and MP4 are both video formats used for storing and streaming videos. The main difference between MP4 and FLV is that they are used for different purposes. FLV is a common format for video streaming and is used by websites like YouTube. On the other hand, MP4 is widely used by mobile devices like smartphones, media players, and the like. Additional MP4 vs. FLV comparisons are in the table below.

Comparison parameterFLVMP4
File extension.flv, .f4v, .f4p, others.mp4
Video coding formatsSorenson, VP6, Screen Video, H.264/MPEG-4 AVCH.264, H.265, MPEG-4, others
Audio coding formatsMP3, Nellymoser, ADPCM, LPCM, AAC, SpeexMP3, AAC, AC-3, others
Device and OS compatibilityRequires additional codecs to be installed on PC and Mac, no native support for mobile devicesCompatible with almost all devices and operating systems

Frequently Asked Questions

An FLV file is stored within the FLV container format. This format is used for streaming video content on the Internet when using the Adobe Flash Player.

FLV is appropriate for uploading and playing videos on the web. But FLV files can’t be played on PCs without additional codecs and are not supported on some mobile devices. So if you want to watch a video on your device, MP4 is a good choice since it’s a universal format supported by almost every player.

FLV is not natively supported on iPhone. But you can install special players that can run FLV files. Another option is to convert FLV files to MP4 or another format that’s compatible with the iPhone.

FLV files are encoded with lossy codecs such as VP6 or H.264. For this reason, FLV files are relatively small in size and can be easily transmitted over the Internet. If you’re looking for a more efficient coding format, try HEVC – in comparison with H.264, this codec provides better data compression at the same bit rate.

The main advantages of FLV files are that they can be played in web browsers and are usually quite small in size.