566 reputation
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location Cologne, Germany
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visits member for 3 years, 3 months
seen Aug 13 at 22:51

Functional programming enthusiast, audio engineer & musician. Whilst not busy with any of that, I study physics at Universität zu Köln / Bonn-Cologne Graduate School.


Jan
4
comment Non-Linear Video Editor for Free or Cheap That Does These Things
Mind, Lightworks isn't free, in particular not free, though they say they're moving towards open-source. But offering a gratis release isn't the same thing.
Nov
19
comment Why do some camcorders record in 1080i?
There are no interlaced displays anymore, though.
Oct
16
comment Does mjpeg handle interlaced video correctly?
Using the words "properly" and "interlaced" in one sentence is basically a contradiction in itself. The whole idea of interlaced video is nothing but a historical artifact. You should try to get to an all-progressive workflow.
Aug
7
comment How to include proof of when a video was made, something that couldn't be be faked at a later date?
Now with good chroma keying methods and other digital tricks available to anyone, you probably won't get anything bullet-proof. Macabrely, speaking to someone terminally ill and perhaps hugging them is the only thing that would seem really convincing to me; I don't think this could be faked so well that a close relative of the person in question wouldn't notice. But that's for several reasons not a idea you should consider. – If you need to proove something happened at a particular time, a video just isn't the right way; get something signed by a notary instead.
Jul
15
comment Using 1080i on a 720P monitor will produce better image/video quality?
Indeed interlacing and frame rate is going to be the biggest issue here; going down from 1080 to 720 lines should work flawlessly and give no difference to native resolution quality-wise – after all sampling is lossless, right...? (It really is, in this sense!)
Jun
26
comment Why is compression rarely included as a builtin effect?
Whether you call compression an effect or "a dynamics" is just nomenclature. I'd say sure it is an effect. What compression definitely is not is a send effect, but an insert effect. Which means, it wouldn't make much sense to put it in the multiprocessor found on typical analogue live consoles; but it does make sense to put it right in a channel (much like the EQs).
Jun
7
comment What compression should I use for archiving VHS tapes to HDD?
MPEG2 isn't great for editing, either, since it has already P- and B-frames just like h.264. It's easier to decode, yes, but the difference isn't that big (OTOH, h.264 is much more expensive to encode, but this isn't an issue here since copying from VHS takes ages anyway). And MPEG2 has much nastier artifacts than any of the alternatives at comparable bitrates. The only real advantage of MPEG2 is its near-universal support (any DVD player will do).
May
1
comment What Happens to Frequencies Above the Nyquist Limit?
Note that this wouldn't happen in a properly designed system – good ADCs and nonlinear digital effects include bandlimiting precautions, so if you "try" to produce frequencies higher than Nyqvist you only get silence there.
Mar
2
comment Color temperature
Perhaps you could clarify this – you might have used the words "warm" and "cold" in two opposite meanings here, or at least said it in a way that might confuse people. Warm light, the yellowish kind characteristic for old incandescend bulbs, has in fact a lower color temperature than blueish, "cold" light from e.g. fluorescent tubes. — Also, I don't quite agree about using light sources of different temperature in the same scene; this can be used as an effect but usually just makes either of the objects look strange.
Dec
2
comment How could an 8-bit encoding take more memory than a 10-bit encoding?
That's surely just not true in general, but it might hold for certain codecs. You'll need to be a bit more specific.
Nov
23
comment Are there any mathematical advantages for higher sampling rates?
All professional audio software works with 32 or 64 bit floating-point internally during the mix, regardless of the bit depth used during recording.
Oct
20
comment Windows 7 - multiple programs with conflicting sound output
Again, what kind of driver does Ableton use? There are a couple of possibilities, like DirectSound or ASIO4All, which work quite differently in such regards.
Oct
20
comment Windows 7 - multiple programs with conflicting sound output
What audio devices do you use, and with what driver? You bet it's quite intentional that programs other than your DAW aren't granted access, so there won't be any conflicts over e.g. sample rate. — There are specialised frameworks for bringing the audio from different programs together, perhaps most notably ReWire. You won't be able to use this with programs that aren't professional audio applications, though.
Sep
12
comment Should I just get a gaming PC for audio/video production?
Graphics processors currently are of no relevance at all in audio production; in video production they are primarily used to run codecs on, but for that a really high-end graphics card isn't much better than an average one. However, things might well change in the future – as technologies such as CUDA and OpenCL become more popular, more video and perhaps also audio software will use them. In some cases, this might greatly boost performance.
Jul
7
comment how can I smoothly move a camera without a dolly?
To nitpick, it's actually not so much stabilised by gravity as by moment of inertia.
Jul
2
comment Difference Matte Keying software
Yes, but that's not the same thing. Difference blending just combines two images, while difference matte uses one image to create a mask for another one through which it can then be combined with a third image.
Jun
30
comment Difference Matte Keying software
You don't have to convert your computer, it's no problem to install a Linux parallel to Windows (assuming that's what you're using now). Do it, it's worth the effort! — Cinelerra might even run under Windows with Cygwin, though getting that to work tends to be rather difficult. — I don't mind if you don't accept this answer, but you should add something about the operating system to the question body, especially since you write "free software" there, which at least to me suggests a preference for Linux.
Jun
30
comment Adding voiceover without video recompression
It's correct that a new file needs to be created, but that doesn't tell anything about recompression, which indeed can be avoided for the non-modified track.
Jun
10
comment Options to speed up Hobbyist Rendering?
Better CPUs? You could be more specific on what kind of stuff you actually want to render, but for the tasks they can do at all GPUs are obviously more effective.
Apr
19
comment Removing horizontal scan lines from video?
I wouldn't describe those as lines. Looks like a sync issue with your lighting, do you use fluorescent lamps?