DAV to MP4 Converter – Free, Fast & Private
Convert Dahua CCTV .dav recordings to MP4 locally in your browser — your footage never leaves your device
How to convert DAV to MP4
Choose or drag in your DAV file — nothing is uploaded, it stays on your device.
Click Start Converting — H.264 sources are rewrapped losslessly in seconds; other codecs are re-encoded to MP4 (H.264/AAC).
Download your standard MP4 file.
About DAV to MP4 conversion
DAV is the export format of Dahua DVRs and NVRs (and of the many Amcrest, Lorex, Q-See and other recorders built on Dahua hardware). It is H.264 or HEVC video in Dahua's own packet wrapper with G.711 audio, so nothing but the Smart Player can open it. This tool unpacks the stream into a standard MP4 that plays on any phone, computer or web player — entirely in your browser, which matters for security footage: it is never uploaded to anyone's server.
Frequently asked questions
Some recorders export encrypted DAV files, and older firmware wrote a different, undocumented wrapper. Neither can be read by this converter (or by FFmpeg/VLC). Export the clip again with encryption off, or save it as MP4/AVI from the recorder's Smart Player.
The date/time overlay burned into the picture by the camera is part of the video and stays. Dahua's separate metadata track (watermark, frame timestamps) is not carried into MP4 — keep the original .dav file if the footage may be needed as evidence.
No. The conversion runs entirely in your browser using WebAssembly (FFmpeg). Your file never leaves your device — that is also why there is no upload wait, no queue and no file-size pricing.
Up to 8GB on desktop browsers and 2GB on mobile. There is no limit on the number of files you convert, and no signup or watermark.
Yes — completely free and unlimited, with no watermark, no signup and no daily quota. Because the conversion runs on your own device instead of our servers, there are no processing costs to charge for.
If the source already contains H.264 video, the file is rewrapped without re-encoding and finishes in seconds, even for gigabyte files. Other codecs are re-encoded in parallel WebAssembly workers, which runs at roughly real-time speed on a modern computer.
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on Windows, macOS, ChromeOS, Linux, iOS and Android. There is nothing to install.
AAC and MP3 audio is copied over unchanged. Other audio codecs (PCM from cameras, Vorbis, Opus…) are converted to AAC so the resulting MP4 plays everywhere.