AVI Compressor——How to Compress AVI Files Efficiently on Windows

Method 1. Change the Advanced Encoder to Shrink AVI Files (High-quality Preserved)

AVI is often encoded through Divx/XviD/MPEG4/H264. Compared with these old codecs, H265/HEVC and VP9 are more advanced and can encode a video to a much smaller size with high-quality preserved. So you can convert AVI to H.265 (HEVC for MP4) or change the codec to the VP9 encoder to make AVI file smaller.

Free downloadFree download this program before starting the process.

Step 1: Launch HD Video Converter Factory Pro and open the Converter module. Then, hit the +Add Files button to load the AVI files. Or you can also drag and drop the source AVI files into the program.

Step 2: Click the big format image on the right side of the interface to expand the output format list. Go to the Video category and choose one format from either H265 for MP4 (recommend), H265 for MKV, or VP9.

Step 3: Click the bottom triangle button to set the destination folder and press the Run button to start the AVI compression.

Method 2. Downscale Video Resolution to Reduce AVI File Size

Typically, the higher the resolution is, the larger the AVI video size will be. So one of the most efficient ways to downsize AVI file is to reduce the video resolution. But this method will inevitably lead to a quality loss. So we suggest that you change video resolution from a high-quality video like 4K/2K/1080P so that the compressed video can still have a decent output quality.

GetGet this AVI video compressor and follow the steps.

Step 1: Launch the program and choose the Converter module. Then click the center + button to load files into the program.

Step 2: Unfold the right-side output format image and select the AVI format under the Video category or other formats as you like.

Step 3: Open the Parameter settings to change the Resolution under Video Settings. (e.g. from 1280x720 to 640x480) You can also head to the Quick setting below the Parameter settings and drag the sliders to your preferred resolution.

Step 4: Choose an output destination and press Run to start the AVI compression process.

Method 3. Reduce Video Bit Rate to Compress AVI Files

Video bitrate is also a crucial factor that affects the video file size. The lower the bitrate of the video is, the smaller the video size you will get. But this method also will degrade the video quality, so don’t make it too low or use this method with high bitrate video, otherwise, the image quality can be really bad.

InstallInstall the video size compressor and follow the how-to steps:

Step 1: Open HD Video Converter and select Converter to enter the main interface. Then follow the instruction on the main interface to load your AVI files into the program.

Step 2: Choose the original AVI video format or change it to another format by clicking the right-side output format image.

Step 3: Click the bottom compression button and drag the sliders to the right to set the compression ratio. (Note: The slider goes more right; the video is compressed smaller.) Alternatively, you can also open the Parameter settings and customize the specific video bitrate.

Step 4: Set the Output folder and press Run to start compressing AVI files.

Method 4. Lower Frame Rates to Downsize AVI Files

Another effective way to compress AVI files is to reduce the video frame rates. The video is smooth enough to play between 24~30 fps, the higher frame rates may be invisible to the human eyes. So if your video is shot in 50 fps or 60 fps, you can reduce the AVI file size by changing the frame rates to 24 fps or 30 fps. But note that frame rates dropped under 20 fps will cause visible inconsistency during the video playback.

Before starting the process, free downloadfree download it to be prepared.

Step 1: Run the software and open the Converter window. Then click the +Add files button to import the source AVI files into the program. You can also directly drag and drop the source videos into the program.

Step 2: Hit the right-side format image to open the output format list. Go to the Video category and select the original AVI format. You can also select other formats according to your actual needs.

Step 3: Open the Parameter settings window and head to the Frame rate under the Video Settings. Choose an option from the Frame rate drop-down list, or you can customize another specific frame rate.

Step 4: Specify a destination folder to keep the compressed AVI files and then press the Run button to start compression.

Method 5. Remove Unwanted Parts to Make AVI File Smaller

If your videos contain some redundant parts like black bars or some ads, you can also crop or cut these unwanted parts to reduce AVI File size. (This method can also compress AVI files with good quality preserved.)

You can downloaddownload this AVI size reducer here and see the tutorial.

Step 1: Just as the previous methods, you need to Open the HD Video Converter Factory Pro and select Converter among the five modules, then load the AVI files into the converter by clicking the +Add Files button or directly drag and drop them into the program.

Step 2: In the video taskbar, click the scissor icon to open the Trim window and trim AVI files to cut the unwanted parts, like ads. You can also click the fourth crop icon to remove the black bars and other nonsense pictures to shrink AVI files.

Step 3: Unfold the output format list on the right side of the interface and select the original output AVI video format or other formats under the Video category. (Tips: Keep the parameters (bit rate, encoder, resolution, etc.) of the output video consistent with the original video.)

Step 4: Specify an output path by clicking the bottom triangle button. And press Run to compress AVI without losing quality.