Convert DVR to MXF — Free Online Tool
Convert DVR recordings to MXF, the broadcast-standard container used in professional post-production workflows. This tool re-encodes video using H.264 (libx264) and upgrades audio from compressed AAC to uncompressed PCM 16-bit — making DVR footage compatible with NLEs like Avid and broadcast ingest systems.
to
FFmpeg Command
Copy this command to run the same conversion locally with FFmpeg on your desktop. Download FFmpeg
Drop your DVR file here
or click to browse
Free — no uploads, no signups. Your files never leave your browser.
Settings
Note: Browser-based encoding uses approximate quality targets. For precise CRF compression, copy the FFmpeg command above and run it on your desktop.
Estimated output:
Conversion Complete!
DownloadHow It Works
DVR files typically store H.264 video with AAC audio in a proprietary container designed for recording devices, not editorial workflows. During this conversion, the H.264 video stream is re-encoded into a new libx264 stream wrapped in MXF, while the AAC audio — a lossy, compressed format — is transcoded to PCM 16-bit (pcm_s16le), which is uncompressed linear audio. This audio upgrade is significant: PCM is the standard expected by broadcast ingest pipelines and professional NLEs, eliminating any downstream compatibility issues caused by compressed audio in an MXF wrapper. The resulting MXF file carries timecode support and the metadata structure expected by broadcast tools, though metadata from the original DVR container (such as recorder-specific tags) is generally not preserved.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg application — the underlying engine that powers this browser-based tool via WebAssembly (FFmpeg.wasm). The same binary command runs identically on desktop Linux, macOS, and Windows for processing files larger than 1GB. |
-i input.dvr
|
Specifies the input file — in this case a .dvr file from a digital video recorder. FFmpeg demuxes the proprietary DVR container to extract the raw H.264 video and AAC audio elementary streams for processing. |
-c:v libx264
|
Sets the video encoder to libx264, re-encoding the video stream as H.264 within the MXF container. Since the source DVR video is already H.264, this step ensures the output conforms to MXF's OP1a wrapping requirements rather than passing through a potentially non-conformant stream. |
-c:a pcm_s16le
|
Transcodes the audio from the DVR's compressed AAC codec to uncompressed 16-bit little-endian PCM — the audio format expected by broadcast ingest systems, Avid Media Composer, and other professional tools that consume MXF files. |
-crf 23
|
Sets the H.264 Constant Rate Factor to 23, the default quality level that balances file size and visual quality for most content. Applied to the re-encoded video stream, this is suitable for archival and editorial use; lower values like 18 would better preserve fine detail in surveillance or broadcast footage at the cost of larger file size. |
-b:a 192k
|
Specifies a 192 kbps audio bitrate target. For pcm_s16le (uncompressed PCM), the actual bitrate is governed by sample rate and bit depth rather than this flag, but it is included to align with MXF audio track metadata expectations and ensures compatibility if the audio codec is later swapped to a compressed format like AAC. |
output.mxf
|
Defines the output filename with the .mxf extension, instructing FFmpeg to wrap the encoded H.264 video and PCM audio into an MXF container — the professional broadcast format compatible with Avid, broadcast archives, and post-production delivery pipelines. |
Common Use Cases
- Ingesting surveillance or security DVR footage into a broadcast-ready editing system like Avid Media Composer for use in a news segment or documentary
- Preparing captured television content from a DVR device for delivery to a broadcast archive that mandates MXF with PCM audio
- Transferring DVR recordings into a post-production facility's asset management system that only accepts MXF-wrapped media
- Upgrading DVR footage with compressed AAC audio to uncompressed PCM audio to meet broadcast loudness and quality specifications
- Converting proprietary DVR files to an open, standardized MXF container so the footage remains accessible long-term without proprietary playback software
- Preparing field-recorded DVR content for color grading in DaVinci Resolve when the project deliverable requires MXF with professional audio
Frequently Asked Questions
The video is re-encoded using libx264 at CRF 23, which is the default 'visually transparent' setting for H.264 — meaning quality loss is minimal and generally imperceptible at normal viewing sizes. However, because the video is being re-encoded rather than copied, there is always a small generational quality cost. If you need to minimize this, you can lower the CRF value (e.g., CRF 18) for higher quality at the expense of a larger file.
MXF is a broadcast and post-production container, and professional workflows — including broadcast ingest, Avid Media Composer, and network delivery — expect uncompressed PCM audio. AAC is a consumer-grade compressed format that, while technically wrappable in MXF, is not universally accepted by broadcast tools. The conversion to pcm_s16le (16-bit PCM) ensures maximum compatibility with professional systems and eliminates any audio decoding latency in editing applications.
Yes, expect a noticeable increase in file size primarily due to the audio track. AAC audio at 128k is highly compressed, while pcm_s16le is completely uncompressed — a 1-hour audio track at 48kHz stereo in PCM takes roughly 600MB versus about 57MB in AAC. The video size will be similar to the original depending on content complexity, though slight differences are normal due to re-encoding.
MXF natively supports timecode as part of its specification, and FFmpeg will include timecode metadata in the output MXF. However, timecode from the original DVR file may not be preserved if the proprietary container did not expose it in a way FFmpeg can read. In most cases, FFmpeg will generate a timecode starting at 00:00:00:00 unless source timecode is detected.
To change video quality, modify the -crf value: lower numbers (e.g., -crf 18) mean higher quality and larger files; higher numbers (e.g., -crf 28) mean smaller files with more compression. To adjust audio, the -b:a flag is not strictly applicable to PCM (since PCM bitrate is determined by sample rate and bit depth), but you can switch to a different audio codec — for example, replacing pcm_s16le with pcm_s24le for 24-bit audio, which is common in high-end broadcast and film post-production workflows.
Yes. On the command line, you can loop over files using a shell script. On Linux or macOS: `for f in *.dvr; do ffmpeg -i "$f" -c:v libx264 -c:a pcm_s16le -crf 23 -b:a 192k "${f%.dvr}.mxf"; done`. On Windows (PowerShell): `Get-ChildItem *.dvr | ForEach-Object { ffmpeg -i $_.FullName -c:v libx264 -c:a pcm_s16le -crf 23 -b:a 192k ($_.BaseName + '.mxf') }`. The browser-based tool processes one file at a time, so the command line is the recommended approach for bulk conversions.
Technical Notes
DVR containers are proprietary formats with limited standardization — different manufacturers implement them differently, which means FFmpeg's ability to demux them can vary depending on the specific device that created the file. The video codec inside DVR files is almost always H.264 (libx264), and this conversion re-encodes it at CRF 23 rather than stream-copying, which ensures the output is well-formed within the MXF OP1a wrapper that most broadcast systems expect. The audio transcode from AAC to pcm_s16le is a lossy-to-lossless-format upgrade in terms of container and codec type, but since the original AAC source was already lossy, the original audio quality ceiling is retained — you will not recover frequencies that AAC discarded. MXF supports multiple audio tracks, which this command does not exploit (it maps the single source audio track), but users with multi-track needs can add explicit -map flags. Subtitle and chapter data from DVR sources are not supported by either format in this workflow. For broadcast delivery, verify whether your destination system requires OP1a or OP-Atom MXF wrapping, as some Avid workflows prefer OP-Atom — FFmpeg defaults to OP1a for MXF output.