一个有目的性的bug！！关于GH2外部记录

之前看了很多文章都是关于NINJA记录器和AF103的搭配的，也许很多人都会想我用的是GH2能不能也加上这样一个记录器来输出呢。结果今天我就看见一篇国外的文章，建议是：如果你想要买ninja记录器去配你的GH2那你最好还是等待它的破解。

GH2的HDMI硬件的确可以输出可爱的4：2：2，24p没错，但它的固件搅乱了这些。您仍然可以通过GH2记录到Atomos忍者或其他外接记录设备，但它不会是24p，而且不会比内部的AVCHD质量好。

在笔者看来，那是故意插入相机的HDMI输出以防止NINJA高品质的24P型4-2-2提取的bug。

详见原文：

How a purposeful bug prevents 24p external recording on GH2

If you are thinking of buying an Atomos Ninja for your GH2, it is probably best to wait for the hack.

A few weeks ago I ended up researching how to extract 24p from Sony FS100 footage delivered via a 60i signal to an Atomos Ninja for Philip Bloom and came across some information about the GH2\'s HDMI output which I wasn\'t aware of previously.
In my opinion, a bug was purposefully ｉｎｓｅｒｔed into the HDMI output of the camera to prevent the extraction of high quality 24p 4-2-2 on an Atomos Ninja.
The purposeful bug interferes with the timing pattern of the 60i interlaced signal. Due to HDMI TV standards, 24p is transmitted inside an interlaced wrapper. Normally software can perform 3:2 pulldown removal and de-interlacing to extract 24p from this wrapper, but the timing interference makes this impossible.
I believe Panasonic purposefully programmed the firmware to have a random cadence pattern, because HDMI outputs and formats are too well understood for it to be a genuinely accidental flaw.
Personally I think this is very naughty.
The HDMI hardware in the GH2 can do lovely 4-2-2 and 24p, and the firmware messes with it. You can still record footage via the GH2 to an Atomos Ninja or other device but it will not be 24p and it won\'t be as good a quality as the internal AVCHD.
Consumer and professional broadcast divisions should operate fully autonomously (and that is the official company line) but clearly this isn\'t quite the case.
It is sad to see a firmware team taking time actually to program out existing normal functionality.

Good luck with your hack Vitaliy!

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