Mactrix
Forum Replies Created
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Panasonic Varicam, 14 Bit quantization, 10-Bit HD-SDI out, 720p60
The links you’ve posted are exactly what I mean. It’s marketing
bullshit from the manufactures, besides the first link. But the
first link has nothing to do with video. It’s film, it’s logarithmic
color space – total different story and yes, working with film
demands more than 8-Bit.The graphic from the last link says nothing. It’s a typical trivial
illustration that should show how much more range 10 Bit offers.
Yes, it’s true there are four times more steps … but this is the
only theory … if you don’t have this on tape it won’t help. And
I made enough tests with DigiBeta. You don’t have it on tape.And I made tests with hard disk recording. It’s very difficult to
make the true 10-Bit visible even in HD (video noise is one
reason – aka dithering). It matters only in computer generated
graphics and gradients that don’t exist in “nature” … -
In fact, FCP on a fast G5 renders much more faster than AVID do.
In fact AVID DSP boards support some realtime functions so there
is no need for rendering in many cases …
In fact software rendering gives better control over quality and
realtime means often “quick and dirty”. Don’t worry about rendering
speed and quality in FCP. Rendering won’t take longer than a messy
offline/online-workflow. Also the scaling quality was enhanced in
FCP 5. Try using the unlimited RT-extrem preview settings to receive
a realtime preview … -
When you shoot only in 10-Bit how can you notice any difference to 8-Bit? 😉
I worked with real 10-Bit HD (straight from the camera signal feed, hardisk-recorded,
no tape influence) footage and there was no way to produce banding artefacts in
10- or 8-Bit. Sometimes I ask my self if people really know what banding means and
how it looks like. But it sounds great for the client … 🙂 -
well, if the analog-to-digital converter quantizes with more
than 8-Bit (AJA and BMD use 10, 12, or 14-Bit converters)
than you could keep more of information in a 10-Bit codec
than with 8-Bit.However it depends your footage and because of the video
noise you won’t have similar colour values like in a gradient
created in a graphic application like Photoshop … in 99,99%
of all cases you’re fine in 8-Bit … -
If your footage is in 8-Bit you won’t gain anything.
There are quite no real 10-Bit formats out there.
Even DigiBeta is 8-Bit in luma, and more that 8-Bit
in Chroma, but far away from true 10-Bit.What you mean is internal rendering in more than
8-Bit. This is another question. Capturing 8-Bit
footage in 10-Bit duplicates pixel values. No extra
information will be added … -
Stay in 8-Bit … 10-Bit is more voodoo than visual.
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Hi Mark,
this is absolutely normal. Check the system settings in Final Cut Pro.
You can find there a gamma correction. It’s not possible to turn this
off but what it does is to simulate the video gamma of your video
monitor at the canvas video on your computer monitor. If you’re
working in 10-bit the shift should be stronger than with 8-bit.Hope this helps …
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This mistake is often made in europe/germany.
Your DoP thought this is a framerate the post-production needs … it’s not
720p25 is not a standard! (Yet). No video I/O card can capture or output
it. No VTR can record it (expect JVC HDV). Because there is no VTR there
is no output over a video connection like HD-SDI.The only thing you can do is to use the HD1200 to convert your 720p25
to 1080i25 (psf – it’s still progressive) and capture it over HD-SDI. There
is no other solution. Maybe the DVS clipster can read the 25p flags and
convert for FCP …50p is currently not possible with FCP. Hopefully the next version (NAB is
near).Greetings from germany (come visit the german forum at finalcutpro.de
to find details for 720p25) -
Keep in mind that 720p25 isn’t a standard format.
It’s not transfered over SDI and no VTR can play it back.The BMD settings try to get the pullup pattern from the
60p (59,94) signal …I would shot and work in 30p and transcode the master
to 25p … -
“Even pay extra for a codec.”
Why not pay a little extra for a Mac? ;-))