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GH2 Flow Motion v2 - 100 Mbps Fast Action Performance - Series 2
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  • Hi Guys This is my first post so apologies for my poor knowledge. I have a question ,I have installed latest flowmotion hack and as far I understand it records around 100mb/s but when I check my files in stream parser 2.6 the average bit rate is around 55 mb/s recording in FSH 25P. When I change to FH then the bit rate is around 30 mb/s . Is that correct or I've got something wrong?

    Thank you

  • @LPowell Hi LPowell, apologies if this was asked before. I've been reading the threads and couldn't find an answer. I'm wondering if it's possible or makes sense (in case it's possible) to raise the lowest bitrate setting to a higher setting, so for example the lowest bit rate we get is at least 30/40 mbps? Thanks!

  • @wisiu @mastroiani The bitrates listed for each of Flow Motion's video modes are the peak bitrates, which are important to consider when choosing an SD card. The bitrates reported by most utilities are average bitrates, which will vary depending on how finely detailed your subjects are. The GH2's AVCHD encoder will use only as much bitrate as it needs to encoded the video at the quality level programmed in each Flow Motion video mode. With subjects that have few details, Flow Motion automatically records at its finest quality, and there's no need to raise the bitrate any higher.

  • I apologize for my English is horrible but it is absolutely not my mother tongue.

    I find the GH2 hacks and motion flow seems to be a very good compromise for functions and stability but I am surprised that nobody is trying to work our sampling GH2.

    Currently it seems to me is 4.2.0 but I see only hacks who seek more flow but not switch to 4.2.2 or 4.4.4, is there a reason?? ???

    Is that the Flowmotion works well and has no bugs because I work both in 1080p25 1080p24 than 1080i50 or that Ai and often with the auto-focus.

    Thank you for your advice and congratulations to all.

  • in fact my card is a Sandisk Extreme SDXC 64GB 45MB / s class 10 and 1, is that it is good and on average how much can I save in time with Flowmotion?

    Otherwise should appoint as the original hack GH2_V11 before putting on the map? How to revert to the original if desired???

    Thank you for helping the beginner that I am.

  • @utilinet I'm not an expert on this, but I think the limitation of shooting only within the 4:2:0 color space is a restriction of the sensor, and can't be resolved with a hack. I think that some external recorders (such as the Ninja) may allow 4:2:2 recording, but not 4:4:4.

  • @ScubaBob wonderful underwater shots, bravo! The fishes were not scared, you move quietly :-)

    About freezing: happens here and there, but which SD card did you use? Speaking only out of my own experience, the best card for the GH2 is Sandisk SDXC 95MB/s 64GB and I don't use any other cards anymore. Also freezing appears very seldom compared to other cards I used before.

  • This was a commercial shot using a GH2 with flowmotionv2 on some of these shots, I was using Canon EF 70-200mm f/2.8L . The other cameras being used were the Canon t2i with same lens.

    A big lesson learned on this shoot was NOT to use crop sensor mode on the GH2... that footage looked soft. We had a 2X lens doubler that I wish I would have used instead of the crop mode.

  • Thanks for the conpliments and reply @tetakpatak . I'm using the Sandisk 32gb 45MB/s card perhaps I was pushing the limits of that card at the point of the freeze?

  • @ScubaBob it is not unlikely, as different types of SD cards vary extremely regarding the construction, buffers etc. As result, the spanning, camera freezing and errors occur easy if the card isn't fast enough.

    If I remember well, LPowell even recommends use of sdxc 64GB 95MBs with the Flowmotion anyway. Check also Faqs on this site, I think one can find many very useful information about SD cards there.

  • Hi all, I tested this hack my GH2 with Motion Flow v2.2 but I find it super hard to pass a 64GB card can hold 7 hours of video in only 1 hour of video. So I would like to know what are the parameters to keep in changes to keep the video quality while reducing the flow may be, I would try to work for the above may at least reduce the video card 4h. Thank you.

  • Its quite easy: Less bitrate means less quality.You can save bitrate by using longer GOP patches, but there is tradeofs in motion. All in all: You get what you pay for. ;)

  • @utilinet In situations where you need to pack longer video clips into an SD card, I'd recommend trying FM2's 60Mbps modes: 24L, FH, and H. These settings work the same as the corresponding 100Mbps modes with just a notch more compression, and support 4GB file-spanning on Class 10 SD cards.

  • Hi, this is my first attempt to install the hack. I am checking settings, that I loaded in ptool and I see that both "Auto quantizer for 1080 modes" and "Auto quantizer for 720 modes" options are unchecked. Is this expected?

  • @casper Did you skip to read LPowell's first post? The very highest value of this patch is in its using of the Q. Of course auto Q function is unchecked, it is all about Q's fine tuning to avoid GH2's macroblocking. LPowell worked for months on the Q, I belive.

  • Been testing these settings and got a damaged video file. VLC just stops playing after some time. Running ffplay from command line plays back the file, but I get these warnings in the terminal

    Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, s16, 192 kb/s Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090) Frame changed from size:0x0 to size:1920x1080B vq= 1457KB sq= 5096B f=0/0
    [h264 @ 0x7fb9ac034600] Missing reference picture sq=10146B f=0/0
    [h264 @ 0x7fb9ac034600] decode_slice_header error [h264 @ 0x7fb9ac034600] concealing 8160 DC, 8160 AC, 8160 MV errors in B frame [h264 @ 0x7fb9ac029e00] Missing reference picture [h264 @ 0x7fb9ac029e00] decode_slice_header error [h264 @ 0x7fb9ac029e00] concealing 8160 DC, 8160 AC, 8160 MV errors in B frame [h264 @ 0x7fb9ac034600] Missing reference picture sq=10146B f=0/0
    [h264 @ 0x7fb9ac034600] decode_slice_header error [h264 @ 0x7fb9ac034600] concealing 8160 DC, 8160 AC, 8160 MV errors in B frame [h264 @ 0x7fb9ac029e00] Missing reference picture [h264 @ 0x7fb9ac029e00] decode_slice_header error [h264 @ 0x7fb9ac029e00] concealing 8160 DC, 8160 AC, 8160 MV errors in B frame 31.10 A-V: 0.005 fd= 56 aq= 0KB vq= 0KB sq= 0B f=0/0

  • @tetakpatak, thanks for the explanation

  • Some grabs from a spec industrial/commercial shoot recently. Nikkor 35mm f/1.4 lens and ISO 160, if you can believe that. It was really like having the sun indoors in this Honda service center, it was so well lit.

    serviceDept (0.01.20.03).png
    1920 x 1080 - 2M
    serviceDept (0.01.27.22).png
    1920 x 1080 - 2M
    serviceDept (0.02.37.21).png
    1920 x 1080 - 2M
  • @LPowell I'm a little late to the GH2/GH3 game, having been a Canon user for awhile until my Mark III began overheating during interviews lasting longer than 15 min. (Ugh.) Finally sold the Canons, purchased a couple of Pannys and took my GH2's with FM2 installed out in the field today. All I can say is wow. It's phenomenal, Lee. I've had less than ideal results with other patches, but FM2 was stable and spanned beautifully on a Sandisk 64GB 95mb/s card. Thank you for your work and for sharing it with us.

  • Hello, can someone tell me how to activate/use 25P on my GH2 camera while using FlowMotion? Thanks!

  • Set TV - Out to PAL, insert empty SD card, switch cam to HBR.

  • @Meierhans thanks. I will try that!

  • This is my first hack with my GH2, just got the cam a few days ago. However, although the installation process went fine, I'm not totally sure if FM is up and running. When I transfer the footage with Log and Transfer in Final Cut 7, it says the bit rate of the clips is around 13-16 MB/s for a 24H clip. Is this what I should be aiming for? Thanks

  • Don't confuse megabytes and megabits…