AVI to MP4 Converter - Free Desktop App

Yes. Diwadi converts AVI surveillance footage to MP4 using the H.264 codec at the same bitrate as the original, so there is no visible quality loss. For DVR exports that use MJPEG or H.264 inside the AVI container, the conversion re-encodes into a universally compatible MP4 file while preserving the original resolution and frame rate.

Many DVR and NVR systems — especially older models from Swann, Lorex, and Samsung — were designed when AVI was the dominant video container. AVI's simple structure made it reliable for continuous recording. Manufacturers kept using it for backward compatibility with existing installations. Newer systems are moving to MP4 or MKV, but millions of legacy DVRs still export AVI exclusively.

The burned-in timestamps that appear directly on the video frames (the white text overlay showing date and time) are preserved because they are part of the video image itself. However, metadata stored in the AVI container header — such as creation date and device info — may not transfer to the MP4 container since the two formats store metadata differently. If you need to preserve metadata for legal purposes, keep the original AVI file alongside the converted MP4.

It depends on the original AVI codec. AVI files using older codecs like MJPEG can be 5-10x larger than an equivalent H.264 MP4. For example, 1 hour of MJPEG surveillance footage at 1080p might be 15-25 GB as AVI but only 2-4 GB as MP4. If the AVI already uses H.264 internally, the size difference will be minimal — you are mainly changing the container for compatibility.

Yes. Diwadi supports batch conversion — drag an entire folder of AVI files and they will all be converted to MP4. This is especially useful for security professionals who need to convert weeks of DVR exports. The app processes files in parallel using hardware acceleration, so converting 100+ files takes minutes rather than hours.

Yes. Diwadi handles all common AVI codecs including DivX, Xvid, MJPEG, H.264, MPEG-4, and Indeo. These older codecs are the main reason AVI files fail to play on modern devices — macOS and iOS dropped support for DivX/Xvid years ago. Converting to MP4 with H.264 ensures the video plays on every device and platform.

It depends on the source codec. If the AVI file contains H.264 video, Diwadi can remux (repackage) it into an MP4 container almost instantly with zero quality loss. If the AVI uses an older codec like MJPEG, DivX, or Xvid, the video must be re-encoded to H.264, which takes longer but produces a much more compatible and often smaller file. Diwadi automatically detects the codec and chooses the fastest path.

Yes, significantly. Hardware acceleration uses your GPU (Apple Silicon, Intel Quick Sync, or NVIDIA NVENC) to encode video 5-20x faster than CPU-only conversion. A 10 GB AVI surveillance file that would take 30 minutes with CPU encoding can finish in 2-5 minutes with hardware acceleration enabled. This is especially important when batch converting large DVR exports.

Apple removed support for many AVI codecs starting with macOS Catalina and iOS 13. AVI files using DivX, Xvid, or MPEG-4 Part 2 simply will not open in QuickTime, Photos, or any iOS video player. Even AVI files with supported codecs often fail because the AVI container itself has limited support on Apple devices. Converting to MP4 is the permanent fix — MP4 plays natively on every Apple device.

Yes. Diwadi processes everything locally on your computer — your footage is never uploaded to any server, which is critical for chain-of-custody requirements. The conversion preserves the original video frames, resolution, and any burned-in timestamps. For legal use, we recommend keeping the original AVI file as the primary evidence and using the MP4 conversion for playback in court or submission to insurance portals that require MP4 format.