SD Association revealed “Video Speed Class” with support for 8k and multi-file video recording

The SD Association has revealed their fastest speed class called Video Speed Class, which also delivers real-time multi-file recording (4K, 8K, 3D and 360 degree video recordings). Additional information:

The new Video Speed Class maintains the tradition of ensuring guaranteed minimum performance levels as the familiar Speed Class and UHS Speed Class systems do today. Minimum speeds will range from 6MB to 90 MB per second. The fastest options, V60 and V90, support 8K resolution, while V6, V10 and V30 capture high-definition and 4K resolution. All speed classes guarantee minimum video recording speeds to ensure smooth video playback, so actual recording performance may be even faster.

This entry was posted in Other. Bookmark the permalink. Trackbacks are closed, but you can post a comment.
  • Well now, that’s not at all confusing.

    • Jeffry De Meyer

      Yes this is exactly what we needed more crap to put on those tiny labels, instead of just a big MB/s rating

  • nwcs

    Too many of these silly labels and icons. The industry should standardize on one metric and let the best quality win.

  • WillWeaverRVA

    Time to order a Class 10/U3/V30/10W-30 card… 😉

    • Jeffry De Meyer

      Will that be in sd sdhc or sdxc?

  • Les

    “V6, V10 and V30 capture high-definition and 4K resolution.”

    They are doing their customers a disservice (aka “lying”) by writing that stuff. 4K at 6 MB/s looks terrible. As far as I am concerned, 90MB/s is an absolute minimum for capturing 4K, but you want more if your video is ever going to be broadcast or projected.

    Note: I’m talking about in-camera bit rates. I know that dedicated compression hardware can get better results, but that’s done offline after editing, effects, grading, etc.

    • Some guy

      I think you have your Bytes and bits mixed up. I agree that 6 MB/s (48Mb/s) isn’t good, but 90 MB/s (720Mb/s) is a HUGE “absolute minimum” and well more than enough for broadcast. 1 big B Byte = 8 little b bits.

      4k mirrorless cameras like the GH4 and A7 series have 100Mb/s bitrates, and they look pretty great (although not perfect). The C300 II’s highest bitrate is 410 Mb/s. Bitrates significantly higher than that will most likely be RAW 4k or a higher resolution.

      • Les

        I am basing this on personal experience. 95 MB/s is the current minimum acceptable speed for the BMPCC, which does 1080p. Cards that fast have been available for years now, so trying to tell people that they can use a 6MB/s card to record 4K is just wrong, it will confuse and ultimately disappoint customers.

        The two cameras you mention really need external recorders to get full-quality files.

        Broadcast is different. You can use a lot more compression, partly because the files will not be re-compressed, partly because you don’t need edit-friendly compression, and partly because the files are compressed offline on powerful computers rather than in-camera.

        • Some guy

          I’m also basing this off personal experience, and you’re not quite right. The BMPCC (assuming you’re talking about the Blackmagic Pocket Cinema Camera) has a bitrate of 220Mb/s for ProRes 422 HQ, which is just under 30MB/s. You need a card that will never go slower than that, which is what U3 and V30 guarantee. You do not need a 95MB/s card, but most U3 cards have a max read speed in that range. Some also have a similar max write speed, but it’s not uncommon for the max write speed on a 95MB/s card to be half that – and that’s fine, because you only actually need sustained 30MB/s.

          That’s not to say that any 30MB/s card will work, because most cards list their max speed and not their minimum speed. Also most cards will list the faster of read or write, and that’s usually the read speed which is irrelevant in this discussion.

          I don’t disagree that the GH4 and A7S/S2/R2 will benefit from an external recorder, but it’s just not true that they need it. You see footage captured on their SD cards (which means 100Mb/s bitrate and only 8-bit color) fairly often on TV and in movies whether you know it or not. Using an external recorder will get you a lot more flexibility, but it isn’t necessary in many situations.

          Personally I much prefer to use a “real” video/cinema camera (and usually do unless there’s a specific reason not to) and I do like those files a lot more, but to say that 95MB/s is the minimum for quality 4k is simply untrue.

  • Musouka

    What about UHS-II cards. Are they not getting ratings?

    You can get cards between 1000x (150 MB/s) and 2000X (300 MB/s) at retail now if you have moolah.

  • Back to top