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A new format for the 4K powerhouse

By introducing simultaneously in 2015 its 4K format called XF-AVC and the Canon C300 mark II, Canon gave itself a second chance to catch Sony in the war for 4K dominance.
Canon proposed a H.264/AVC encoding wrapped in MXF files — a copycat of
Sony XAVC format — and marketed it as Canon XF-AVC.

Besides C300mkII

Unfortunately, very few other Canon cameras can record in XF-AVC format:

  • Camcorders XC10 and XC15
  • High-end camcorder XF705
  • Canon Cinema EOS models C200, C500 mark II and C700
XF-AVC Intra 4K 10bit 24fps
CFast 2.0

Avoiding problems with CFast cards

We frequently have to recover MXF clips from CFast cards.
Avoiding the two most common problems is easy.

Writing Speed

XF-AVC format has many possible recording settings, ranging in resolution from fullHD to 4K and in image quality from 8 bit 420 Long GOP to 12 bit 444 Intra.
Therefore, XF-AVC clips can have a bitrate between 50 Mbit/s and 410 Mbit/s.

Not all CFast cards are fast enough to support the highest quality settings, and a wrong card choice will ruin the shoot.

Writing speeds reported by card manufacturers are always optimal speeds, that usually cannot be sustained during an entire recording session.
Therefore, make sure that you use a card that has been certified by Canon and that supports your recording settings.

You can learn more about this topic by taking lesson 203 of our Video Repair Academy.

Dual Slots and Proxy Recording

With the C300mkII, you can use two CFast 2.0 slots and one SD slot.
Thanks to simultaneous recording, you can configure a video recording with backup or proxy stream. In case of a card failure or lack of space, you are covered.

But this gives a false sense of security:
In case of camera failure, for example a firmware crash or a power shutdown, dual recording will not prevent the clips being recorded from becoming corrupted!

In addition, having to manage multiple cards can lead to errors. When offloading clips or formatting cards, it is easier to make a mistake and end up with lost footage.

To be 100% safe, nothing comes close to using 2 cameras, recording at once.

Try Treasured on your corrupted XF-AVC files!

Our service offers:

  • FREE diagnostics and preview with Treasured
  • FREE sample of repaired video
  • Try before you buy with a FREE trial of your Repair Kit
  • Enjoy FREE customer support by speaking directly with our trained experts
  • Invaluable expertise, dedication and second to none customer service
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Failure modes

The causes of failure reported by XF-AVC users needing to repair files are:

Recording failures

  • Loss of power during recording (clip not finalized)
  • MXF footage doesn't import in Canon utility
  • Device was turned off during recording
    producing a TMP file instead of MXF

Storage failures

  • CFast card has been formatted by accident
  • Recovered* MXF files are still not playable
    * recovered through undelete or recovery utilities
  • Accidental deletion of MXF files
Fixing MXF files DeepMediaScan 4K Wars

Related Topics


How to recover corrupted XF-AVC clips?

Treasured detects Canon XF-AVC footage in recovered files — regardless of extension, TMP, MXF or other — and also inside formatted CFast cards, thanks to DeepMediaScan.

All different resolutions found in XF-AVC files are supported.

  • 4K (DCI) 4096x2160
  • QuadHD (QFHD) 3840x2160
  • 2K 2048x1080
  • HD 1920x1080

Solution: Your Repair Kit, developed by our technicians

Since 2015, we have successfully repaired damaged XF-AVC footage by developing and providing specific Repair Kits to our customers.

  • Same quality is preserved in the repaired files as it was originally recorded.
  • Repaired videos come in MXF containers and are fully compatible with production workflows, exactly the same way as normal footage is.