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12 bit and 10 bit RAW shooting with Magiclantern start to be feasible
  • yskuntoyskunto

    I read a Magiclantern forum thread.

    It is starting to be feasible to record 12 bit and 10 bit on 5Dm2 and EOSM. It could be read here: http://www.magiclantern.fm/forum/index.php?topic=5601.625
  • 22 Replies sorted by
  • zcreamzcream

    Wow. Hopefully on 50D as well..This will allow 2K recording on a 7 year old camera..

  • robertGLrobertGL

    I"ve been trying with my 50D but I get magenta frames on the three available bit depths and every even numbered frame repeating frame zero over and over ... hoping they can get everything worked out

  • yskuntoyskunto

    Their test bed is 5D mark 2 and EOS M generation 1. If they could make it on the popular 550D/Canon Rebel T2i, then it would be a good 10 bit RAW camera with crop factor of 1.6-1.7 when using 3x5 pixel binding and 2.39:1 aspect ratio.

    I will get a 550D since some report said that 12 bit RAW works.
  • Vitaliy_KiselevVitaliy_Kiselev

    @yskunto

    Isn't 550D really slow writing to card?

  • yskuntoyskunto

    Yes, 21MB/Sec I think. They try to implement 12 bit and 10 bit to bypass slow sd card limitation that the hunger for speed 14 bit needed. It is also meant to reduce the need for high capacity sd card as well. That is what they said.

  • zcreamzcream

    This is not good..

    The DMA channel is configured for 14-bit image size, we only copy 12-bit (or 10-bit) data from it, and what happens with the excess data... Canon knows.

    So they are not mapping 14 bits to 12 or 10. All they are doing is dropping a part of the data. Whats the point..

  • zcreamzcream

    My bad - first thread is the assembly routine. It is compression

    http://www.magiclantern.fm/forum/index.php?topic=5601.0

  • yskuntoyskunto

    I still cannot find a second-hand 550D in my neighborhood. So still not able to give a first-hand impression

    But the magiclantern guys keep in making progress. More people report that their 5D2 now is able to record at 12 bit and with audio. It means they gain more resolution with less bitrate. http://www.magiclantern.fm/forum/index.php?topic=5601.650
  • yskuntoyskunto

    They are progressing: http://www.magiclantern.fm/forum/index.php?topic=5601.725

    Now the 600D, EOS-M, 5D3, 700D, 650D have move forward in 12 bit (10 bit) RAW recording.
  • robertGLrobertGL

    So 2.39:1 - 1824x764 for Eos-M, 650D and 700D will be feasible with 10-bit recording.. pretty good

  • kkfokkkfok

    With the same card writing speed, does it mean that higher resolution is possible with 10/12bit instead of 16bit raw? I really look forward to shoot raw video of higher resolution with 5D3 and I will sell my 1DC.

  • robertGLrobertGL

    with 5D3 I think so yes, but in crop mode, so you you lose the benefits of the full sensor. It will give you more recording time in 1080p however. This is all still in development stage though, so I'd wait until they have it in the daily official firmware release

  • zcreamzcream

    Per my calculations, 2.7k video in crop mode at 12 bit raw up to 30p is possible on 50d. This gives 2x vs 3x crop on sensor

    Just wish the sync beep on video start was enabled for 50d in ml menu :-(

  • zcreamzcream

    2.2K at 10-bit RAW

    > Max continuous recording raw_rec Continuous recording with 2208x1242 or smaller resolutions at 30fps. >

    On 5D3 - 50D has similar speed CF card controller I believe.

  • bannedindvbannedindv

    One might think they would be able to use the the inbuilt Raw reduction algorithms for MRAW and SRAW to record smaller files for raw video using the canon cr2 format for the frames someday. No doubt the people building Magic Lantern are definitely geniuses though.

  • zcreamzcream

    Still issues with Digic IV cameras..

    Looks like it is worth repeating that the following cameras need to get the CONFIG_EDMAC_RAW_SLURP treatment before it is worth doing any further tests with them.

    5D2.212 - Digic 4 7D.203 - Dual Digic 4 50D.109 - Digic 4 500D.111 - Digic 4 550D.109 - Digic 4

  • zcreamzcream

    https://www.magiclantern.fm/forum/index.php?topic=5601.1300

    Digic 4 has been cracked. So 7d, 50d and 5d2 are working. Sort off.

    Vitaliy posted a links in deals thread about adorama clearance. Buy a used 50d for 260$ or used 5d2 for 500$ and try out these raw cameras

  • zcreamzcream

    https://www.magiclantern.fm/forum/index.php?topic=5601.1300

    24P at 2520x1200 video. 2.5K - Not too bad at 10-bit RAW.

    So far its a linear mapping 14-bit to 10-bit. Would be interesting to get a log map for log profile..

    buffer_size_compressed = (buffer_size_used * 10) / 14;

  • robertGLrobertGL

    zcream do you have a 50D? I always got first frame repeating in odd frames, and magenta frames also, but that was an earlier build

  • zcreamzcream

    I do have it. Cannot use it now - but that seems to be an issue ATM. Same problem with 7D and 5D2.

    Top third of frame turns pink and green every other frame while bottom two thirds constantly jumps back to frame 1.

    Its positive that 2.5K does work..And it is approx the same FOV as the BMCC on the 50D.

    I am going to try hardcode the values for HDR video when I get around to it and have some more time.

  • zcreamzcream

    10bit and 12bit raw working on 5d2 and 50d. @robertgl https://www.magiclantern.fm/forum/index.php?topic=5601.msg206561.msg#206561

  • robertGLrobertGL

    Thanks for the heads-up. I'll have to try this out, but it might be a while. I also purchased an Eos M, which has seen more advances in development than the 50D

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