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AVCHD maximum image quality settings and testing
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  • Well much greener than normal - defo difference when you hold it against a bright chart.
  • Huh? The LCD always goes slightly green when you go into record mode - pre-hack, post hack, any hack! Are you saying sometimes your's doesn't?
  • @Ralph_B Have you noticed that whenever youre testing & you press record if the lcd goes slightly green you know its going to fail. When it happens I just move on to the next setting now without even bothering to check the charts and analysis!
  • @neveraholiday Thanks! I will test, but probably stick to Cris's 44/32
  • I've been testing your 55M 720 60P with GOP 30, and it's superb! Don't know if GOP 1 is really necessary for this.
  • I'll be damned if I can get 1080/60i to work on GOP1 - shame cus reading your smear test I have to agree. It seems just as soon as I fix 720p60, 1080i60 goes crud on me. Ive got every other setting working on GOP1 bar that bleeder... I'll keep trying... :-) May have to try a GOP30 on it for now just to enable people to use it and with less smears.
    The problem it seems is 1080i60 is remarkably underpowered - by the buffer charts that is. So I'm trying very hard to balnce out the bitrate between 720p60 and 1080i60, bloody ridiculous. 108050/720p50 is fine!
  • Bring it on!

    BTW, did you have a look at my 1080 60i post above? It's beyond me what needs to be done to fix it.
  • @Ralph_B Nice testing mate. Awesome. What would you say if I told you we just found another 14% performance increase in i frames and lower bitrate for GOP1 ?
  • HDMI vs AVCHD Tests - 240M GOP 1 vs 66M AQ2 GOP 12

    Here's the latest round of real world testing. These are all Photoshop TIFs with layers. HDMI is on the bottom, AVCHD is on top.

    66M AQ2 Static Day - ISO 160
    [url]http://www.sendspace.com/file/fsrw8n[/url]

    240M GOP1 Static Day - ISO 160
    [url]http://www.sendspace.com/file/1lpi90[/url]

    66M AQ2 Motion Day - ISO 160
    [url]http://www.sendspace.com/file/fxf25u[/url]

    240M GOP1 Motion Day - ISO 160
    [url]http://www.sendspace.com/file/usza4o[/url]

    66M AQ2 Static Night - ISO 6400
    [url]http://www.sendspace.com/file/vaoifr[/url]

    240M GOP1 Static Night - ISO 6400
    [url]http://www.sendspace.com/file/331pmn[/url]

    IMPRESSIONS: 240M GOP1 and 66M AQ2 GOP 12 are really, really close. I'll leave it up to you to decide.
  • @Tomaso Hell, I can't find where the settings were posted. I went through all the old topics that I could think of. the only thing close to that is this post by @OSGondar: http://www.personal-view.com/talks/discussion/comment/11765#Comment_11765

    @stonebat mentions below to stay below 44. Maybe that is how I assembled this setting? Tricks of the brain?

    I attach my ini. But I suggest, you stick to @cbrandin's settings, as they are all tested throughly. The ones I got are not, as I work on a mac and don't have the software to stream parse and what else. Only thing I am saying is, I like the image that is coming out and the files are spanning. i50 FSH with 44M is not working – only FH.
    seta.ini.zip
    413B
  • @neveraholiday I can't find the @vitaliy settings you are refering to in the top of this topic. I only find a suggestion from him to try GOP 24. I understand that the only patches used are 44/35 gop12 ag3 for 25H and 24L, but what are the 50i and 50p 35mbit/s settings you are using. If you could share the ini please. I am currently mainly useing Cris 44/32 settings.
  • I use an old setting that @vitaliy suggested at the very top of this topic. I know, it probably doesn't give all the nice values as the new tweaks do, but the images look good to me and the files are spanning at 24H:

    44/35 gop12 aq3

    Nothing else patched.

    EDIT: even 50i runs at 35mbit/s. Not as nice as 24p but better than the original setting.
  • Which settings are currently spanning?

    @Driftwood 244M GOP1 24H
    @CBrandin 44M/32M GOP12 24L
    ...

    Can we analyze why these spans while other's dont? Has it to do with datarates, card speed, AQ, GOP settings? Or is there something that @Vitaliy_Kiselev needs to change in the next PTool release?
  • I don't think anything's wrong per say, at the stock setting. That's just what 17 mbps 60i GOP 15 looks like.
  • Wow.... strange indeed!
    Since the issue is occurring with stock settings, I wonder if it's worth mentioning this to Panasonic? Or, possibly Vitialiy, Chris, or someone may have an idea.
  • Progressive mode is clean. This is an interlace problem only.

    RE: stock mode - I examined some pre-hack nighttime shots and I do indeed see something similar, EXCEPT it's one clean frame follwed by fourteen smeared frames - in other words, the GOP 15.

    What's wierd with the current problem is neither of the settings is a GOP 3 - Chris's 32M is GOP 15 and driftwood's 55M is GOP 30.
  • Thanks Raph.
    This is great information. Now, how is this happening?... hmmm strange.
    Ralph, can you check stock 1080 60i?
    Also, you are not seeing this in progressive modes?

    Thanks Houston!

    Over and out...
  • Houston, we have a problem...

    I've been testing driftwood's 55M 1080 60i settings, and there is a unique problem I have not seen on any of the 24P patches. The noise varies in a three frame cycle - Frame 1 has high resolution noise (good), Frame 2 has blurred noise (bad), Frame 3 has blurred noise (bad), and then the cycle repeats.

    Here is a Photoshop TIF with 4 layers, each layer being a consecutive frame. This is a 1:1 crop at ISO 6400. As you turn the layers on and off, you can see the changes in the noise. Look in the orange area of the far building and the greenish area of the near house.

    [url]http://www.sendspace.com/file/9s5zg6[/url]

    This 3 frame cycle is not unique to driftwood's 55M. Chris's 32M 1080 60i also has it. It's obvious that interlace is a different animal. And this is definitely noticable when you watch the movie at speed. The picture really does appear smeared because the blurred frames outnumber the clean ones 2:1.

    I ran these clips through stream parser and there is no indication that anything is askew. This is one of those times where real world testing is critical.
  • @Stray
    Thank you for the good STRONG test chart!
    I use instantly. :-)
  • Oh. I was looking at those files via iPhone. I'm seeing them in a big screen now. Thanks.
  • @stonebat Sorry I don't understand what you mean, can't you just save the image ?
  • @Stray Do you have a softcopy of the color test chart? Can you share it please?
  • @proaudio4:

    > Please re-read my post. Again, the camera should not crash upon any setting the user chooses in the menu.
    If the stock GH2 did this, not many would buy it.

    Maybe you should re-read MY posts:

    "I wasn't talking about reliability" &
    "(and of course reliability is crucial too)"

    Somehow the two of you got so defensive that you simply didn't read what I wrote. Maybe you missed this as well:

    "thanks a bunch for nailing these settings for the rest of us."

    > We're not here to talk about settings

    stonebat _asked_ me about using Chris' settings (I realise now it was only to score a point, but that wasn't obvious to me at the time).

    Anyway, carry on.
  • Stray,
    Yes, I remember Chris mentioned the lack of color in the pappas chart a while back.
    These look excellent and should be very helpful.
    thanks!
  • @proaudio4 Great stuff cheers.

    @cbrandin As has been pointed out the deathchart at the moment really needs some colour information. Quickly this morning I made this, it is modifiable if it isn't dense enough. I've made it not as repetitive as it seems too (based on how the codec looks for similarity). Is this good enough or should there be more lines at less width ? Edit : added a denser version and something a bit more random.
    colourdeathchart.png
    1920 x 1080 - 3M
    colourdeathchart_denser.png
    1920 x 1080 - 5M
    alt_chart.png
    1920 x 1080 - 5M
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