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GH2 Flow Motion v2 - 100Mbps Fast Action Performance & Reliability for Class 10 SD cards
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  • Here's a comparison shot of the Nikon D5100, with Picture and White Balance settings adjusted for a close match with the GH2 in 24H mode, using Flow Motion v2.02:

    Nikon D5100

    Panasonic GH2

    Nikon D5100 Daylight Settings:

    ISO -1/3 stop slower than GH2

    Picture Control - NL

    Sharpness 3

    Contrast 0

    Brightness -1

    Saturation -1

    Hue 0

    WB Sunlight

    A+3

    M-1

    GH2 Daylight Settings:

    Film Mode Smooth

    Contrast -2

    Sharpness -2

    Saturation -1

    Noise Reduce -2

    WB Daylight

    A-3

    M-2

  • thx Peter, Nokton 25mm f/0.95, smooth -2,-2,0,-2 post in Final Cut Pro 7: ProgAmp, Colorbalance and 3 way color correction.

  • @Lambo Real nice Lambo! What lens, setting and post did you use/do?

  • Another ridiculous flow motion test.

  • @Loganm187 Thanks for your report. It would be helpful if you could detail the GH2 setup and exposure settings you were using at the time the camera stopped recording. This would allow me to better narrow down the possible causes.

    The cases where the camera stopped recording after running for 20 minutes or more are very likely file-spanning failures. This is one of the more fragile features of the GH2 and has been very time-consuming to test. You may be able to determine if this was the case by examining the length of the last MTS file the camera recorded before it stopped. If it is either close to 4GB in size, or is a very short file immediately following a 4GB file, then it is a file-spanning failure.

    I documented the potential for recording failures when using Lumix auto-focus lenses in 720p60 SH modes in the first post of this thread. This behavior is consistent with your report of the camera working faultlessly with manual-focus lenses, but not with Lumix lenses.

    For reliable recording in both the file-spanning and 720p cases, I recommend using Flow Motion's 60Mbps 24L, FH, or H video modes rather than the 100Mbps 24H, HBR, FSH and SH modes. Aside from being safely limited to a 60Mbps peak bitrate, 24L, FH, and H video modes work exactly the same as FM2's 100Mbps modes, producing excellent motion picture quality with just a notch tighter compression.

  • UPDATE Camera just stopped recording with none native lens at 1 hour and 13 minutes. It seems all 3 gh2's are doing this. This has to be a known problem.

  • @Loganm187 I think the additional strain on the processor just makes it tired. I've never had a failure in FM using anything other than electronic lenses.

    It gets worse in TE mode.

    This happens once in a while with FM2X (Never had it in the old FM), in all of Nicks settings and everything except Sanity.

    I keep preloaded cheap SD cards with all the settings I use. FM2.2 is my all around setting I keep in one camera...Sedna, CM Night and Sanity are the others that get swapped around in the other camera.

  • I'm also using sandisk 64gb 95mbs cards

  • it happened on a shoot yesterday multiple times stopping about 10 or 15 seconds in until after about 4 tries it recording long enough for us to capture the shot. it was the only time in the entire shoot we used a native m 4/3rd lens (14mm 2.5) I was shooting with flowmotion on 24p H mode. This morning I put the lens on to test it and it went 24 minutes befor stopping. Panny battery was full at the same settings. I then changed setting to 720p 60 and after about 20 it stopped as well. I now put a samyang 35mm on with adapter and it's been running staring at the tv on 720p 60 settings for over one hour just fine.

  • @Loganm187 I'd like to try to reproduce the problem you encountered. Can you provide more details on the shooting setups where you've seen the camera stop recording?

  • I am using flowmotion for an event coming up running 3 gh2's and while doing tests to make sure the cam will stay stable during the capturing when using any native m 4/3rd the camera will just stop recording randomly from 10 seconds to 30 minutes it will just stop recording randomly. When using a non native lens it seems to run fine for hours. Is this typical of this patch or all of them? kinda scares me a little.

  • @Lpowell Thx for your answer, i don't need the 1080i FSH and 720p SH modes, I'm only working with the HBR mode, but i don't like the big files, i think halve off the bitrate is ok for my Projects. Please correct me, when i reduce the 1080i FSH and 720p SH mode to 50 Mbps, the HBR mode is 50 Mbps also?

  • @Lpowell

    I just installed the patch. I am running with a 45MB/sec 32 GB card. How long (timewise) can I typically expect to record without running into spanning issues in 24p H? Also, how much footage (time) would you estimate can be recorded?

    I am intending on getting some major testing done this weekend, so your estimates will help me immensely.

  • @vankickem Sorry, but lowering HBR peak bitrate to 40Mbps would reduce the bitrate of 1080i FSH and 720p SH modes as well. Unfortunately, Panasonic did not include a lower bitrate version of HBR mode similar to FH and H modes. To get motion picture quality comparable to 24H mode, HBR really needs its 100Mbps peak bitrate.

  • @Lpowell thx for your great settings. Is it possible to set the HBR mode to peak bitrate of 40Mbps? When yes?, witch setting in the ini File? greetings René

  • @dmoreno Yes, you can lower Flow Motion's 24L and FH/H Video Bitrate settings independently without affecting any of the 100Mbps video modes. To obtain a 24L peak bitrate of 40Mbps, you'd want to set 24L Video Bitrate to about 36M.

    As the bitrate setting is lowered, the encoder will compress the video data tighter to stay within the peak bitrate. This will typically have little or no perceptible effect on low-detail static scenes. It's with active, highly-detailed scenes where the reduced bitrate will start to show. In practice, you can set 24L as low as 20M for static indoor shots.

  • Hello @LPowell and thanks for your excellent settings.
    I was wondering how much I could lower the bitrate of the 'lower' settings (24L) and still get good results. I use my camera for events (weddings, concerts, etc) and also for short ficticional work.
    Flow Motion would be an ideal setting if I could use 24H for fiction and 24L for events, but I would need to lower the bitrate down to about 40 Mbps. Would I still get good results? (better than stock or other low bitrate settings as Sanity 5)

  • @robbin I tried setting DRS to 1 as well, and it did handle AF100 highlight blooming at bit better. Unfortunately, I noticed that DRS can compress details in dark areas as well, which I found highly undesirable. In general, I'm not a fan of the auto-DR features on any of cameras I've used.

  • @LPowell i also run cine-like d but have drs on 1. Have master ped at around -2 when DRS 1 is enabled. Detail i have at 0

  • I invested some time into tweaking GH2 Film Mode/White Balance settings and AF100 Scene File settings to match each other more closely. This gave me even more appreciation for how cinematically the GH2 handles highlights compared to the AF100. Unfortunately, the built-in gamma curves available on the AF100 all produce noticeably higher contrast than the GH2 in Smooth Film Mode with Contrast at -2. The AF100 gamma curve with the lowest contrast is CINE-LIKE D, but its highlights are still a bit extreme compared to the GH2's. This gives the AF100's highlights a telltale videocam edge reminiscent of the HVX200.

    I was, however, able to achieve a much better color and contrast match than my previous attempt. Guided by advice from AF100 Book and the general consensus on the forums, I initially set the AF100's Detail Level to -4 (on a scale of -7 to +7), which is considered rather sharp by most AF100 afficionados:

    http://blog.abelcine.com/2011/04/06/af100-scene-files-created-by-abelcine/

    The results I got from that advice, however, were disappointingly soft compared to those of the GH2 using Flow Motion v2, as can be seen in the videos at the top of this page. I eventually boosted Detail Level to -2 and found that the key to matching the GH2 was to set the AF100's Master Pedestal down to -9. That also crushes most of the low-level sensor noise from the CINE-LIKE D gamma, which allowed me to reduce Detail Coring (noise reduction) to the minimum at -7. To my eyes, this produces a major improvement in image quality, making AF100 footage look much more like the GH2:

    image

    image

    Sorry about the discrepancy in framing, it's due to the AF100's slightly different crop factor and the height of its lens mount. You can download the original, unedited AF100 and GH2 footage here:

    Here are the settings I used on the GH2 and AF100, which I think produce a more pleasing daylight color balance than the defaults on both cameras:

    GH2 Daylight Settings

    Film Mode Smooth

    Contrast -2

    Sharpness -2

    Saturation -1

    Noise Reduce -2

    WB Daylight

    A-3

    M-2

    AF100 Daylight Scene File

    Gamma CINE-LIKE D

    Matrix NORM2

    Detail Level -2

    V Detail Level -2

    Detail Coring -7

    Chroma Level -1

    Chroma Phase 0

    Master Ped -9

    DRS OFF

    Skin tone DTL OFF

    AF100-Daylight Mode.jpg
    1022 x 618 - 276K
    GH2-Daylight Mode.jpg
    1024 x 618 - 306K
  • @L1N3ARX I didn't notice any frame rate issues after the GH2 set in the sun a few hours. It shut itself off spontaneously and after I turned it back on, it failed to flash the ROM with new firmware. No permanent damage though.

  • @bwitz i agree on blocking and mud on af100. Thats why i got the hyperdeck shuttle. Got rid of all problems for me, even motion is good now. Gh2 has some fast motion issues also if you go fram by frame.

  • Hmm, no matter what setting, AF100 just seems inherently soft.

    Yea, there's allot of blocking and mud as well. You really cannot do any "artistic" underexposing or shooting in dark areas. The tonality and rendering of shadows are abysmal. Couple that with the known highlight issues... and you've got about as much workable DR as an iphone4s. And the motion has always looked like that 60i embedded 24p stuff... like the 24f mode on my old canon camcorders. It just doesn't have that true progressive look to the motion. It's hard to describe... but I picked the GH2 over the AF-100 because the GH2 always looked like "motion-images"... where the AF-100 looks like a "video-stream".

    Af100 has a lot more settings than gh2 to tune to get the picture you like.

    ...and the GH2 has 6x the data so you can do that ish in post... where it's meant to be done. :)

    I own, and shoot allot, with the Sigma 30mm 1.4 and have never seen motion trails on any setting. I've never even seem them on my GH2 at all.

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