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GH1 Stable 24p Setting
  • rigsrigs
    I have been using several 1080 24p patch for over a year and finally found one that is stable in all conditions. This is a 12 gop, 220 Mbps patch that averages about 36 Mbps on very high detail scenes with no crashes in motion or locked off framing. I have only tested the 24p mode and no other settings as I have no need for any other format.

    PTool v3.62d (160811) settings





  • 58 Replies sorted by
  • blah_dogsblah_dogs
    buffer was at 84 and gop 6
  • rigsrigs
    Looks good blah_dogs.
    Didyou use my original settings or a mod version
  • blah_dogsblah_dogs
    Used these settings to do a show with almost no light and was pretty happy with the results. This video is a rough edit and has no color correction. Shot with a gh1 and a t2i. The gh1 is on the left side of the band next to the drummer.
  • DrDaveDrDave
    The lens that for me crashes reliably is the Panny 20mm. Set it and forget it.
  • rigsrigs
    @LPowell
    "Other patches that remain a mystery are Encoder Setting 1-3... "
    I have no idea what they do either, I have played with them a bit but dont understand what they relate to myself.
  • LPowellLPowell
    @rigs
    I shot the bush with a Voigtlander 58mm f1.4 set at f4. It's a very sharp lens, though the 14-140mm is also quite sharp when stopped down. I've checked out the patches available in PTools 3.62d, and they appear to work the same as earlier pre-GH2 patches did.

    I did notice that you changed Framerate Related Comparison from 30 to 24, suggesting it may have an effect on Native 24p mode? When I experimented with this patch some time ago, I couldn't determine what effect it had.

    Other patches that remain a mystery are Encoder Setting 1-3...
  • rigsrigs
    @LPowell
    That looks like a cedar bush of death. What lens did you use? I have been using the kit 14-140 lens along with some Canon FD lenses all from f1.4 to f22 @1/50-125. I also use smooth film mode dialed down to -2,-2,0,-2, and have used ND filters (matte box 4x4) and without and had good sucess. I guess my Canadian Cedar trees may be a bit softer and don't have the same affect as yours :).

    I appreciate your great work you having doing in trying to get us all the best patches we can have for the GH cameras. I really hoped this one would be a stable version for all, but it seems like its not. I wonder if there are some tweaks that are available to the GH2 ptools that might help us find a better patch. I relize that they are enterly different codec by perhaps sometime new tweaks can be shared. I can only hope for the better.
  • havasuvideohavasuvideo
    Ah, I see the "bush of death".......LOL

    So, why would I want to increase the buffer to 84?? And, why would I want to change the GOP to 6 or 3??

    Just curious as to why some are already making changes to the patch?? Are you seeing any increases in detail?? Or bit rate??
    I haven't had a crash with this patch yet-in fact, I tried to crash it with whip pans and rapid zoom, while filming the "rocks of death"(what we have for lawn here-rocks-live in the desert), and stuffed animals.
    I've also used this indoors filming various scenes-no crashes.
    But, I have a "real" Sandisk extreme III card. I'd love to find some more-but each time I see them online, they are the wrong part number-they're the "new" UHS-I HD Video cards, which IMHO are junk/rip-off. Probably going with a Kingston class 10 for now, and call it good, if I can't find anymore of the "legacy" class 10 Sandisk cards.
  • LPowellLPowell
    I tried out Rigs' GH1 24p patch on some of the most challenging scenes I've used to test my own patches. The target bitrate of this patch is set to 115Mbps, which is the highest of any stable patch that I've seen. Stream Parser, however, reports that the peak bitrate the patch can produce is over 220Mbps, very close to the maximum advertised bitrate for Sandisk Extreme 30MB/sec SD cards.

    On the most brutal tests, I did see persistent recording failures, typically after 8-12 seconds. However, in these cases the patch produced extremely dense I-frame bitrates of 9Mbits, while maintaining average bitrates below 45Mbps. This indicates that the patch should produce very high quality video images under all but the most stressful conditions.

    Here's an example of a scene that produced a corrupted MTS file after 11.5 seconds:

  • DrDaveDrDave
    The Rigs patch works great indoors, especially for static scenes. Minimal pulsing, smooth transitions, etc. Very nice.
    I made some small changes for a "reliable indoor" patch, upping as suggested the buffer to 84, GOP 12, video bitrate between 22-36. So far I get reliable file spanning indoors at 24p, but will test further.
  • rigsrigs
    @havasuvideo
    "So, is there a "new" setting for this "new" patch, to yield higher bit rates in FHD(1080/24), while also keeping the SH(720/60) mode intact???"

    Try changing the GOP setting for 1080 24p to 6 or 3 and see how that works for you.
  • havasuvideohavasuvideo
    ok, thanks.
    I just did a back to back test between this patch, and the blackout/powell patch. using 1080/24p only, manual settings, Nikon 50mm F2.0 at F2.0 with ND400 filter, 1/50th, locked down on a tripod, with focus pulls to three places in my backyard(brightly colored stuffed animals).
    Each file, yielded an average of 26mb/sec, and neither produces any higher or lower quality, or bit-rates.
    In other words-both patches look identical when shot in a fairly high detailed scene(rocks/stuffed animals/really bright sun-exposure exactly on, then under exposed 1/3 to 2/3rd just to see if it made any difference).

    So, aside from the fact that this new patch seems to yield higher bitrates in SH(720/60P), I'm not seeing any differences.
    However, it should be noted that with the blackout/powell patch, I have to shoot 720/60P in H mode, and manually set the bit rate to 30mb/sec-any higher, or use SH mode, and it crashes.

    So, is there a "new" setting for this "new" patch, to yield higher bit rates in FHD(1080/24), while also keeping the SH(720/60) mode intact???

    Also, a bit off topic-but, for those shooting the 100mb/sec non-native 24p patch-how are you reverse telecining the file, to render it to 24P?? I'm on a PC. Same question for the 75mb/sec patch.....
  • rigsrigs
    @havasuvideo
    @DrDave

    The The Extreme III cards do offer a faster rate then the newer HD video versions, I find them very reliable.

    @havasuvideo
    I believe blues has only adjusted the GOP settings by changing them to GOP 6 or GOP 3 which will increase the overall bit rate and slightly improve motion detail. There are seperate ptool GOP settings for both 720 60p and 1080 24p. My original settings set to 15 GOP for 720 60p. You can adjust them to 10 or 5 for increased bit rates. As well as my original GOP setting for 1080 24p are is 12, which can be changed to 6 or 3. However I have found that these lower GOP setting do increase the bit rate but only slightly improve the overall quailty and may not be as stable in extreme detail scenes.
  • havasuvideohavasuvideo
    I had two of the same cards, and when tested, they didn't do much better than my Kingston Class 4, so I sent them back for a refund.
    I still have one of the original Extreme III 16gb 30mb/sec cards, and it does do that speed on tests. The "HD video" cards tested at 20.90mb/sec read, and 19.41mb/sec write.
    The Extreme III was 29.02mb/sec read, and 26.26mb/sec write. The Kingston Class 4 was 20.90mb/sec read, and 12.28mb/sec write. YMMV

    I get zero errors with my Extreme III card in all modes, but I haven't a clue as to what you guys are changing(GOP-Buffer), and why??

    Can you spell out the changes you made in the settings to get a GOP of 3, or 6?? Is this only in FHD/24P mode, or does it also work in SH/720/60P mode??
  • DrDaveDrDave
    Received my Sandisk 32 gb 30Mb/sec "HD Video" card today, but, alas, will not pass the grass test. Crashes around the same time as the Transcend. Still good indoors, and it is a good patch, just not crash proof.
  • DrDaveDrDave
    On my cam, GOP 12 is more stable, but I am still waiting for my new Sandisk card
  • blah_dogsblah_dogs
    Are these settings when bumped to 84 running stable at 3 and 6 gop? If they are...which is able to span? I would love to be testing for myself but i am still waiting on lenses to get here.
  • DrDaveDrDave
    I've only been trying it for a few days, but it is very smooth, very detailed and more stable. It will file span fairly reliably on my GH13 with the 84 bump. I suggest you try it and see for yourself. I happen to really like it outdoors, except for bleached grass etc.
  • telkitachkitelkitachki
    @blues What benefits does this patch providing at low light situation? What reason to stop using @LPowell s patches and start using this patch?
  • bluesblues
    there is no doubt that the rigs patch is king of Gh13 for low light situation...even at gop3, it plays back in any situation. I have gone thru complicated detail shots outdoors and it performs without crashes.Lets try look into other function of the latest ptool so we can calibrate it further by tweaking the other settings
  • DrDaveDrDave
    Rocks on Premiere Pro---even interlaced.
    So far, the low light grain looks really great, prefer ISO 800 to GH2 (prefer 1600 on the GH2)
    And leaves waving in the wind at ISO 100--which I don't shoot that often--looks amazingly smooth, detailed and judder free.
  • rigsrigs
    I hear ya Tinbeo. I had a handful of them not importing each night on my last production. Seemed like Avid didn't like to import anything over 50Mbps, no matter what the length of the clip was. It was a pain I had to endure for 28 days. The footage still worked in the end, it just meant keeping an eye on the batch imports and transcoding the ones that crashed.
  • tinbeotinbeo
    @rigs : I also edit with avid, so frustrated with importing problems into avid. Ya know what I mean? It showed error and stopped, wasting lots of time.
  • DrDaveDrDave
    @jules--just change the 84
  • rigsrigs
    Higher bit rates are nice but do they really add to better overall quality at that rate? I had used a 3 gop version of this patch on a 28 day shoot in June with 2 GH1 cameras and a GH2. These where all exterior scenes. Though we only had 2 crashes, I did have some problems with higher bit rates not importing into Avid and had to transcode those clips. Some even had a hard time transcoding to DNxHD 175. Stange that they all played back fine in camera and on my PC via Splashlite.
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