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GH2 Cake v2.3: reliability and spanning in 720p, HBR, 24p, and VMM at 2-2.5x stock bit rates
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  • @balazer made a test by coincidence on 16GB Lexar professional (slow older card, which I used for loading the patch) and recorded 50 minutes in HBR. That spanned perfectly, I really liked the quality. Thanks a lot balazer.

  • This prompted me to examine some of my footage with stream parser and I get the cadence problem too in 24H, sometimes, with cake 2.1, this was shot with legacy glass so no AF. I haven't tried v2.2 yet.

  • ...mmm... I've read the previous posts about the issue reported by Rammstein. Maybe what I saw in StreamParser has been caused by the the AF. Maybe...

  • @balazer

    I was playing with StreamParser and some footage from Cake 2.2 when I ran into the following stream "behavior": http://cl.ly/0b2X1y113z2S323l1y1B

    I've got a sandisk extreme [NON-pro] 45mb/s card (the one that replaced the extreme video HD 30mb/s card) and the footage was about some foliage moved by the wind (a quite gentle wind, not strong...).

    24H, ex-tele on, 160iso, camera on tripod, panny 20/1.7 pancake.

    Is it ok?

  • Thread about what card? Did you fix your problem? Try menu, setup, reset. Try a different card. Sounds like a bad card to me.

    smontoto, dynamic range won't be altered by these encoder settings. You can shoot with whatever film mode settings you want.

  • Hey everyone, I just loaded Cake 2.2 today to test it and had a weird recording error. I shot 1st for about 3mins, then 12 secs and finally for around 2mins. I wasn't able to record another time. The camera just wouldn't record anymore. I used a SDXC 95MB/sec, shot in HBR 25p @ f2, shutter 50 and iso 1000. Standard -2-1-2-2. Anyone had the same problem?

    EDIT: found the thread about the card. Sorry!

  • @balazer or whomever wants to chime in. What Film setting do you prefer or are you seeing the most dynamic range with Cake? I see most use a wide array with different hacks, just wanted to know your thoughts about with Cake. Thanks

  • Hi @Rammstein

    The video was shot in 24H using Standard film setting, -2, 0, 0, -2. I used a fixed shutter speed of 1/25-sec and a selection of apertures and ISOs (between 160 and 1250 ISO). We were there about 30 minutes, but even so the light was fading a bit at the end of the shoot hence the high ISO.

    I was pretty careful with exposure so I didn't need to adjust too much in post. However, all the shots were given a bit of "curves" tweaking (but not that much).

    The only shots which had more than that were the strange colour ones (in the bushes) which were done with MB looks, and the shot of Kiera against the sky betwen 1.12 and 1.15. In the original of this shot, the sky was bleached out and a strong white colour, so I keyed out the sky and put in a subtle pale blue gradient in its place.

    Where the eggs animate in, I built up a sequence in reverse. I did this because it's very difficult to add objects and not disturb the ones already there. So we made an arrangement of eggs and ran the camera, then took them away one by one and then reversed the sequence of individual shots to animate them appearing.

    One bit of learning for me: I did the text in a graphics editor, complete with drop shadows, and then imported them as pngs. I realise now I should have blurred them a bit, as the white text alises quite badly.

    I'm very pleased with it, though, considering we had our bag of eggs but planned the rest of it on the walk to the location!

  • FSH + FH normal moving camera indoor.Look very good for me. Sorry, my english isn't good. Mark_the_Harp what film mode you used in Picnic at Horror Point ?

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  • @Rammstein Thanks for confirming the AF thing - and the files you posted look good, so for both those reasons I'm going to reflash with Cake 2.2

  • Balazer - The Problem ( 24L) is Gone with Cake v2.2. 24L tested in different conditions:rotating and moving the camera , light or dark conditions, static camera . 24L - rock solid .Thanks for quickly repair. Mark_the_Harp - touch-af using Cake works fine for me.

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  • @arvidtp Interesting observation as I'm editing in Sony Vegas and getting quite a few glitches in that software too. Mine are strange random black / green frames, or strange random video level changes. Might be my software rather than the camera files, but am going to try converting first before editing Cake rushes to narrow down the problem. Maybe some of these high / variable bitrate settings cause problems with editors?

    EDIT: no - it's just Vegas not playing nice with my CUDA GPU card, so nothing to do with Cake.

    However, can anyone else using Cake use touchscreen to do touch-af using Cake? Just that my GH2 refuses to do this now - it just brings up the yellow "set area" dialogue. I have posted this elsewhere on PV and plan to re-flash with Cake 2.2 but I thought I'd ask the Cake People if anyone's noticed this issue with their GH2.

  • @balazer - thanks so much for cake! videos look beautiful. And thanks for fixing 24L - might give me just that extra amount of time on a 32GB card that i need for safety shooting performances if i don't have a chance to re-flash with something lower.

    And - a heads up for those using Cake and editing with FCPX: in FCPX 10.0.4 i got some weird glitchy blocking in a number of frames of a 24H clip in a complex, sharply detailed scene when i let FCP do the ingesting (bushes outside in the sun, cat - handheld and very sharp - can post screengrab when i'm back at my own machine). Glitches were of course not there when raw .MTS files were opened in Quicktime 7 using Panasonic AVCAM importer plugin or in Mplayer - it was just in the .mov files that FCPX created on import. And it was just that one clip. Hopefully an isolated incident. I have not seen this before with other hack settings, so maybe there is something about Cake settings that FCPX doesn't like… ?

    Anyway, if there are any FCPX users here - i'd suggest you check your clips before erasing your card, or convert to .mov manually. (This actually prompted me to write an applescript last night to batch re-wrap .MTS files to .mov using quicktime 7 with Panasonic AVCAM importer component installed, something i'd been meaning to do for a while - i know this is not the place, but will share if interest)

    Thanks again!

  • This is with Cake 2.0 (can't keep up!!). Just on-board sound, and a very silly story my daughter and I put together, so she could have a go at planning and editing a video as she and her friends are starting to have fun with cameras. A late Easter present. Enjoy!

  • New: Cake v2.2

    • Improved rate control in 24L

    http://www.personal-view.com/talks/discussion/2123/gh2-cake-v2.2-reliability-and-spanning-in-720p-hbr-24p-and-vmm-at-2-2.5x-stock-bit-rates/p1

    I was able to reproduce and correct Rammstein's issue in 24L mode. 24H was unaffected. Rate control in 24L is looking more uniform now.

    That being said, Cake is optimized for 24H, HBR, and SH modes, and has been tested mostly in those modes. 24L and H are provided with lower bit rates, in case you need them and you're not able to reflash the camera. If you require lower bit rates, I recommend using more efficient settings, e.g. using longer GOPs and B-frames.

  • Thank you all for advice. When I finish college exams I'll do detailed tests. I have not much time now.

  • @Rammstein, film moving objects.
    Those static images don't say anything, except a real nice image...
    I have it some times, but i never see it back in the clip, only in streamparser... let streamplayer play the clip, so you can see way it hapens, a small vibration in the camera does give that strange behavior, becouse its in a moment out off focus, after that the focus is back and the codec in the gh2 pick up where it was.....

  • Manual focus only.Seem to be the only one with this problem.

  • mozes. manual focus only.The problem occurs after 7 or 12 seconds in 24 L.

  • @cbrandin so basically a stream parser graphic with IBP spikes at different levels on a single shot doesn't necessarily mean that the settings/bitrate/scaling are wrong, but is natural since the bitrate adjusts to detail and motion on the scene?

    Does this mean that a perfectly stable and 'healthy' looking stream parser graphic is achieved with static shots with objects, panoramas that rarely change?

  • @moxes

    Good call... I've also seen this kind of thing when autofocus starts to hunt.

  • @Rammstein seems like lost focus, do jou have autofocus on?

  • @balazer I suggest that you make a separate version of timelapse , so there will be less confusion. And thank you for great Cake 2.0 I use them now on both GH2/GF2

  • For rate control problems like that, it really depends on what you're shooting. The problem might not be noticeable at all.

    Better stick to 24H mode. I'll make that my standard recommendation from now on. Cake was optimized for 24H, HBR, and SH, not 24L or H. I put 24L mode in there with a slightly lower bit rate, but I had only done a little bit of testing. Everything seemed fine, but I can't say whether the problem Rammstein is reporting now is an isolated anomaly or a bigger problem with 24L. And even if I thought that there is a problem with 24L mode, I'm not even sure how I could fix it, because I make the rate control work by tuning the GOP table values to the Top bit rate setting, and there is no separate GOP table for 24L. If I were to change 24L mode at all, I would probably just change it to match 24H mode. But that would of course remove 24L as a lower bit rate option in case of problems in 24H. So I'll probably just leave things the way they are. 24L should be thought of as a back-up option, in case you can't get a shot in 24H. If you need lower bit rates, Cake cannot deliver. My approach doesn't give me the flexibility to set 24H mode and 24L mode much different from each other. 24L was set only a little bit below 24H, so you're not losing much by not using it.

  • pardon my asking, but what negative effect does that irregular frame size in 24L have on the resulting video? So far I have not noticed any problems with cake's 24L on my GH2, but my testing has been limited.