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Z-CAM E1 Camera 100 Mbps hack for 4K DCI (fw v0.31)
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  • @CFreak, can you provide comparison between GH4 and E1 footages? It will be very interesting to watch.

  • @storyboardcreativity I don't see any patches running UHD 3840x2160 at 23.976 fps... Would that be possible? That's what a lot of "4k at 24p" is really shot at. An example is those are the settings in the GH4, as long as you are not shooting in DCI 4k (true 4k). Thank you in advance...!

  • @storyboardcreativity yes I can provide some, next time I am near my studio computer, today we are getting snow & iced in, and my current daily work is for a client at another location, so it may take a few days to get to the footage. I shot a MacBeth color chart of every camera for that job under a tungsten light and utilizing the in camera 3200 degree kelvin settings, so that test footage would be the most informative for you. In post (Premiere Pro cc2017) I used an eyedropper tool to white balance each camera to the white patch on the MacBeth chart and the E1 was the farthest out of them all (Sony FS5, 2x AX100, GH4, E1).

  • @CFreak, "I don't see any patches running UHD 3840x2160 at 23.976 fps... Would that be possible?" - sure, I'll make bitrate and GOP patches for you

  • One thing that can be also useful is transfer some patches to Yi M1 (that uses similar config).

    We had some reference to decoding/encoding firmware (it had some small bugs) in Yi M1 topic.

  • @CFreak, just noticed, is it possible to enable 23.976 fps for 4K from menu? If not, we have to unlock it...

  • @CFreak Are you in the upper midwest in the US? It sounds like my family and friends at home in MN are getting dumped on too.

  • @storyboardcreativity yes it is possible to do 23.975 fps in camera it shows up as 4KP24 in the menu, this option is visible in NTSC mode. DCI 4K shows up as 4096P24 in the menu. 4k Full Sensor readout is also possible in 23.976fps in 4:3 aspect ratio, it shows up as 2160P24 (4:3) in the menu.

  • @Greenidge, just checked - it writes 24 fps, not 23.976. I'll make a patch with bitrate and GOP for it.

  • @Greenidge, 2160P24 is NOT a full sensor readout. You can compare any still shooting mode and 2160P24 - difference is visible (angle of view is very different). 2160P24 reads only center of sensor.

  • I've found a chain, where sd-card interface is initialized. It's 50 000 000 Hz (50 MHz) for all cards. This chain is executed before sd-card is active => autoexec.asc will not help us. I'm afraid, I'll have to make a new firmware for E1... :c

  • @storyboardcreativity A new firmware would be great with all those patches included, I tested the MJPEG patch today and i got a bit rate of 133 Mbps in DCI 4K. You're right the 2160p mode is actually 2880 x 2160p it's not just cropped but it's also not 4K. But i did come across something very interesting in the 1728p mode it tried to write the footage @ 479 Mbps, but couldn't write onto the card, popped up with a message saying, the card is slow. Video: MJPA 2304x1728 29.97fps 479812kbps [V: IMAGINE VISION .JPG [eng] (mjpeg, yuvj420p, 2304x1728, 479812 kb/s)] Audio: AAC 48000Hz stereo 128kbps [A: IMAGINE VISION AAC [eng] (aac, 48000 Hz, stereo, 128 kb/s)]

  • @Greenidge, does this smth with 479 Mbps work without any patches? Is it a bug? Maybe we can inspect it for some interesting features.

  • @storyboardcreativity Without the patch it only does 30 Mbps, but it does give you a full sensor 4:3 readout at a resolution of 2304x1728 (same angle of view in stills mode), i'm guessing the MJPEG patch triggered a bug in this mode.

  • @Greenidge, seems interesting. I want to know, does it read full sensor and interpolate or it reads just some pixels from it. It's very important - affects on noises.

  • Just tried to make a firmware with 100 MHz patch for micro-sd card. Seems like it does not work - recording 120 Mb/s footage freezes after ~7 seconds after start.

  • Ahahaha, I'm laughing. Just reached ~200 Mb/s in MJPEG mode (higher causes "slow card" error). H.264 still crashes on ~110 Mbps.

  • 1080 24p always reads as 23.96 fps in Premiere pro. Does 4K 24p actually shoot at 24 frames per second?

  • Also, is it possible to make a patch that shoots 1080 at 100+Mb/s

  • @spacewig, yes, it does real 24p.

    Tip: if you need, you always can use "Interpret footage" function to change framerate of 23.976 fps video.

    About 1080 100 Mb/s: yes it's possible. What framerate do you need?

  • Hi @storyboardcreativity

    1080 24p would be fantastic. If you can make it higher than 100Mbs that would be equally great. Thank you kindly for doing this, it is much appreciated :) I am also happy to do simple testing if you'd like, just send me a PM.

  • Out of curiousity, what bitrate are the MJPEG files?

  • This is fantastic news. Congratulations on working this out.

    Can we can 1080p/25 and 1080p/50 - 100 Mb/s? Also possible is it possible to add this into the HTML out clean feed?

    Well done

  • @spacewig MJPEG files are about 133 Mbps in DCI 4k @ 24p