Usually, the movies we download from the Internet are in RMVB format. If you want to play RMVB files on some portable players such as some mobile phones, MP4 players, PSP, etc., you need to convert RMVB files to other video formats like MP4. We need a video format converter that can convert RMVB to MP4 format to convert RMVB files to MP4.

Part 1. What is RMVB?

So, what exactly is RMVB? Full named as RealMedia Variable Bit Rate, RMVB is a variable bit rate (VBR) extension of the RealMedia Multimedia Digital Container format developed by RealNetworks. The video format is initially positioned in the video streaming application, and different compression ratios can be set according to different network transmission rates, so that real-time transmission and playback of image data on a low-rate network can be realized. The advantage is that the file is small and easy to spread on the Internet. The disadvantage is that the clarity is not very satisfactory. As mentioned earlier, RMVB is not compatible with other media players. Therefore, it is imperative to convert RMVB into a more compatible MP4 format. Luckily, there are many RMVB to MP4 converters for us to convert RMVB format to MP4 video format, at the same time, we can switch to some online video converters for help as well.

Part 2. Convert RMVB to MP4 with Leawo Video Converter

The first video converter I recommend is Leawo Video Converter. It is a professional video converter for Windows XP / Vista / 7/8/10 users while its Mac converter Leawo Video Converter for Mac is specially designed for Mac users. Leawo Video Converter comes with a user-friendly interface that can be used as an RMVB to MP4 converter to convert RMVB to MP4 in a simple way. You can easily convert video files between all formats, such as MP4, AVI, MKV, FLV, F4V, MPEG, WMV, VOB, etc. Just download and install Leawo Video Converter and then follow the step-by-step guide here to convert RMVB to MP4 with Leawo Video Converter.

Step 1. Download and Install Leawo Video Converter

Click the link below to download and install Leawo Video Converter. If you are using Mac version, you can download and install Mac counterpart of Leawo Video Converter.

Step 2. Import RMVB Files Leawo Video Converter

Launch the program you just installed, and click the Convert tab to enter the interface of Leawo Video Converter. Upload the RMVB video to the program by clicking “Add Video” or directly drag and drop the targeted video into the program interface. Then you can play back the loaded video file, add external subtitles for it, and edit it with the internal video editor, etc.


Step 3. Choose MP4 as Output Format

After importing targeted RMVB video file, you will need to click the drop-down box named "MP4 Video" by default and then click the green "Change" button to select MP4 as output format. Note that the name of the drop-down box will change when you select another output format. In a nutshell, Open the drop-down box next the big "Convert" button, follow the direction "Change" > "Profile" panel > "Format" > MP4. Now you have chosen MP4 as the output format, or you could use the search bar on the left of the panel to search MP4.


Step 4. Set Video and Audio parameters with Leawo Video Converter

After setting MP4 as output video format, you can further adjust video and audio parameters. After you click “Edit” green option under “MP4 Video” button, you can adjust the video and audio parameters of the selected output profile, including: video codec, quality, video size, bit rate, frame rate, aspect ratio, and audio codec. , quality, bit rate, sample rate, channel, etc.


Step 5. Choose Output Directory and Start Conversion from RMVB to MP4

When output video format and parameters setting are finished, you will be directed into the main interface, where you need to click the green “Convert” button to pop up a side bar for output directory setting. At last, you need to click the “Convert” button at the bottom to start the video converting process from RMVB to MP4. It will take a while to complete the conversion. After the conversion is finished, you can find the converted MP4 files in the output directory.


Besides this professional video converter, there are also some common methods to convert RMVB video to MP4 format.

Part 3: Convert RMVB to MP4 with Any Video Converter

Besides this professional video converter, there are also some common methods to convert RMVB video to MP4 format. Any Video Converter is a simple, all-round interface converter. It supports high-speed and quality-lossless conversion, allowing conversion in several video formats, and it can convert videos including DivX, XviD, MOV, RM, RMVB, MPEG, VOB, DVD, WMV, AVI to MPEG-4 format into your iPod, PSP, MP4, mobile phone or other video playback tools.

Step 1.Download and Install Any Video Converter

It takes only a few minutes to download and install Any Video Converter. If you are using Mac version, you can download and install Mac counterpart of Any Video Converter.

Step 2. Add Videos for Conversion.

Launch the program you just installed, as you can see from the operator interface, there are many options to choose from, such as "Convert Video", "DVD Burning", "Recording Video", "Playing Video". You can drag the RMVB file directly into the converter, or click the green "Add Video" button to browse and select targeted RMVB video file on your PC.


Step 3. Choose MP4 as Output Format

After importing the RMVB video file, you need to click the drop-down box named "select output profile", then select "Video Files" and click "Customized MP4 Video". The format of the output video is set.


Step 4: Convert and Enjoy Converted Video

After all the parameters are set, you can convert the video. Click "Convert Now!" and wait a few minutes to enjoy the HD MP4 format video.


Part 4: Convert RMVB to MP4 with FreeFileConvert

FreeFileConvert provides the ability to convert files to various formats. It supports 8372 different combinations of audio, video, images, documents, archives, presentations, e-books and font file types. It can convert RMVB to MP4 video format in 3 easy steps. To put it simple, the whole process consists of three parts: import RMVB file, choose MP4 output format, and start to convert. Now, let’s begin converting RMVB to MP4 with FreeFileConvert.


Step 1. Import RMVB File
Click “Choose File” to choose and import RMVB file from your computer.

Step 2. Set MP4 as Output Video Format
After RMVB file is imported, choose “Convert Files to” and then choose “MP4” as output format.

Step 3. Start to Convert RMVB to MP4
After the output format is selected, click the blue “Convert” button to convert RMVB to MP4.

Part 5: Convert RMVB to MP4 with Zamzar

Zamzar is a very powerful online file conversion tool. It can convert files in various forms: documents, pictures, music, e-books, compressed files, and CAD files. You only need to follow 3 simple steps to complete the conversion. The result is returned to the user by email, either success or failure. It’s been widely used in converting files. Basically speaking, users are free to do conversion and a number of file formats are supported. The procedure for converting RMVB to MP4 is extremely easy to follow.


Step 1. Import RMVB Files into Zamzar

As Zamzar is an online program, you don't need to download the app to operate. First we need to import RMVB file by clicking “Add Files”.

Step 2. Choose Output Video Format

After importing RMVB video file, we can choose a variety of video formats as output. Here we select the MP4 video format to output. Its operation is also very simple and convenient.

Step 3. Download File after Conversion Is Complete

Click “Convert Now” after output video format is set. After a few seconds of transmission, the conversion is complete. At this time, a new interface will pop up asking us to download or select another operation. Click “Download” to get converted result.

See? It is extremely easy to convert RMVB to MP4 with a RMVB to MP4 video converter. You are free to choose any of those 4 methods, but some of them might have restriction, like file-size limitation, not support for protected video files, etc. In my eyes, Leawo Video Converted is the best one among those 4 methods as it is user-friendly and provides outstanding features for you to convert files from one format to other format. More than a video converter, Leawo Video Converted is a video editor as well. For example, you can use Leawo Video Converter to turn 2D videos into 3D videos. You can download and install Leawo Video Converter to find out more features by yourself.