# AVI to MP4 Converter Convert AVI video files to MP4 format > Canonical page: https://elysiatools.com/en/tools/avi-to-mp4 - **Category:** Media - **Keywords:** avi, mp4, convert, video, format, ffmpeg, container, transcode, h264 ## Overview Convert AVI videos to MP4 format, the most widely supported video format. MP4 offers excellent compatibility with all modern devices, browsers, and media players while maintaining good quality and compression. ## Inputs - **AVI Video File** (file): Select AVI video to convert - **Video Codec** (select) - **Audio Codec** (select) - **CRF Quality (18-28, lower is better)** (number): Only applies when re-encoding. 18-28 is recommended range ## When to use - When you need to play legacy AVI videos on mobile devices or web browsers that do not natively support the AVI container. - When you want to compress large AVI files into a more efficient MP4 format using H.264 or H.265 codecs. - When you need to prepare video files for upload to social media platforms or video hosting sites that require MP4. ## How it works - Upload your AVI video file (up to 100MB) into the converter. - Select your preferred video and audio codecs, or choose 'Copy' to change the container without re-encoding. - Adjust the CRF quality value between 18 and 28 if you are re-encoding the video. - Click convert to process the file and download the optimized MP4 video. ## Use cases - Converting old family videos recorded in AVI format to MP4 for easy sharing on messaging apps. - Preparing raw AVI camera footage for editing in software that prefers MP4 containers. - Transcoding AVI files with H.265 compression to save storage space on local drives. ## Frequently asked questions ### Can I convert AVI to MP4 without losing quality? Yes, by setting both the video and audio codecs to 'Copy', the tool changes the container from AVI to MP4 without re-encoding the streams. ### What is the maximum file size supported? The converter supports AVI video files up to 100MB in size. ### Which video codec should I choose for maximum compatibility? The H.264 (libx264) video codec combined with the AAC audio codec is recommended for the best compatibility across modern devices. ### What does the CRF quality setting do? Constant Rate Factor (CRF) controls the output quality during re-encoding; lower values (like 18) yield higher quality but larger files, while higher values (like 28) produce smaller files. ### Will this tool work on mobile browsers? Yes, this is a web-based tool that works directly in any modern mobile or desktop browser. ## Related tools - [MP4 to AVI Converter](https://elysiatools.com/en/tools/mp4-to-avi): Convert MP4 video files to AVI format - [Batch Video Converter](https://elysiatools.com/en/tools/video-batch-converter): Convert multiple video files between different formats like MP4, WebM, MKV, AVI, MOV with quality settings and batch processing - [Video to APNG](https://elysiatools.com/en/tools/video-to-apng): Convert video clips to APNG (Animated PNG) format with transparency support and better quality than GIF - [Video to GIF Optimized](https://elysiatools.com/en/tools/video-to-gif-optimized): Convert videos to optimized GIF format with advanced compression settings - [Video to Image Sequence](https://elysiatools.com/en/tools/video-to-image-sequence): Extract video frames as an image sequence with customizable frame rate, quality, and output format - [Video Cutter](https://elysiatools.com/en/tools/video-cutter): Cut and trim video clips with precision, supporting multiple formats and quality settings - [FLV to MP4 Converter](https://elysiatools.com/en/tools/flv-to-mp4): Convert FLV video files to MP4 format - [MKV to MP4 Converter](https://elysiatools.com/en/tools/mkv-to-mp4): Convert MKV video files to MP4 format ## Samples - [Video H.264 Samples](https://elysiatools.com/en/samples/video-h264-samples): Sample video files encoded in H.264 (AVC) format - [Video AV1 Samples](https://elysiatools.com/en/samples/video-av1-samples): Sample video files encoded in AV1 format - [Video H.265 Samples](https://elysiatools.com/en/samples/video-h265-samples): Sample video files encoded in H.265 (HEVC) format - [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion ## Related content - [Audio Encoding and Format Conversion Tools](https://elysiatools.com/en/hubs/audio-convert): Compare audio format conversion, bitrate changes, sample-rate conversion, codec swaps, and export tools in one hub for delivery and archive workflows. - [Video-to-Audio and Animation Conversion Tools](https://elysiatools.com/en/hubs/video-convert): Compare tools that turn video into audio, extract video streams, and convert between short-form video and animated image formats in one hub. - [Audio Editing and Cleanup Tools](https://elysiatools.com/en/hubs/audio-utility): Compare audio trimming, silence removal, fades, mixing, and denoise tools in one hub for podcast, voiceover, and music cleanup workflows. - [Video Preview, Extraction, and Subtitle Tools](https://elysiatools.com/en/hubs/video-utility): Compare video preview generation, stream extraction, audio extraction, subtitle translation, and quick flip tools in one hub for lightweight video prep workflows.