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5

There are so many interesting ways to do this. One of the easiest ways (in-camera, no post production work) is to use a piece of glass. Film Riot did a tutorial on it, they explain it best, see below: ...


5

No, there is no practical limit that we know of yet to what would be best, there is however a practical limit to what we can capture and display. In tests with airforce pilots, subjects were able to identify a plane from being shown a frame for only 1/220th of a second.1 They eye is able to pull information out of extremely short periods of time, but ...


5

This is called stroboscopic effect. It refers to when the sample rate is synchronized or very slightly out of sync resulting in a much slower representation of the motion that results from taking a picture that is at the same point or slightly advanced point in a subsequent cycle of a higher frequency cyclic motion. You can actually do the same exact thing ...


4

Trade in the iPad and buy a desktop or laptop that you can edit on. You will not produce professional results entirely on an iPad. I am not aware of any good video editing options for iPad, certainly none of the big names have a product available. There simply isn't enough horsepower on a tablet to perform the hard, complex operations involved in video ...


4

AVI and MKV are both containers, so in theory it should be possible to transfer your contents with no further loss. I can't say for certain if MKV can wrap xvid4, but it's very likely. You shouldn't need to decode / re-encode to transfer the contents, just demux / remux.


4

If you ditch your plan to use moving shots you can do a simple background subtraction which will look a lot cleaner than greenscreen given this is a low cost production. This works by having a shot of your scene without any actor in it e.g. only the background and then film your scene with the actors without moving the camera, afterwards you can use a ...


4

The best results I've achieved were using a light grey cyc or background instead of actual white. They bring the exposure up to where it looks white but you don't have to use nearly as much light on the subject to make them expose properly. We just used kino's with diffusion on the cyc and kino's with less diffusion on the subject with a solid backlight. The ...


3

As Jim Mack has correctly pointed out MKV (Matroska) and AVI are containers, and are both able to store many of the same streams without any change to the streams themselves, and thus the remuxing should be lossless. But there is one time where data is lost when remuxing from AVI to MKV. The thing is that some poor encoders in the day of AVI have created ...


3

The reason why modern TVs have been pushing higher framerates is not because people can see much beyond 30-60Hz, but because if the source framerate and the display framerate doesn't match exactly, then the display has to either drop frames, or add frames. This mismatch is visible, particularly during panning scenes, for instance. It used to be that ...


3

Guess the original poster found his way to do it - I found the following that worked for me, even though I followed a different procedure. I didn't want to convert the MTS files before importing them to iMovie into anything else and was missing too the additional index / descripition files. this is the source and works for Sony SW / Cams. Potentially with ...


3

If you don't mind using a computer. There is a great solution (for me at least) which is called Blender, if you don't know about it, it is a free sortware that lets you do 3D and mix 3D with video, but it also lets you do video editing and a lot more staff. Google for Blender. With that you don't need to be very precise to record your ghosts, just record ...


2

There are plenty of camera apps in the app store that will let you lock of the exposure and focus of the iPad's camera. These are the features that I'd consider most important. Locking focus and exposure keeps the camera's settings from "breathing". This forces you to think about focus and exposure before you start shooting. This forethought is the ...


2

It depends on whether you need to to do this based on a raster image of a finished typeface design or if you are starting from scratch. For both cases you can use flash like shown in the video you linked or you can use After Effects to have some more control over the look, doing this frame by frame is no that easy if you are after specific timing, instead ...


2

Wanted to chime in, Did you know that Bentley Motors ad, was filmed using an iphone. Using an iphone 5s to sell their $300,000 car. You heard right. I was quite surprised. Below are the details. Here is the commercial (after 3:15 mark you see behind the scenes footage) ...


2

There are already 2 great answers, I just wanted to add some input that would be too much as a comment. Firstly it highly depends on which iPad you own, the camera in the first 2 generations were "garbage". I think that changed a bit with the iPad 3 and iPad Air. If the quality of your iPad camera doesn't produce suitable material you can stop right there, ...


2

A similar question (except about 60Hz) was raised on Skeptics Stack Exchange. The answers there discuss how the human eyes works differently to screens and cameras, and doesn't have a frame rate, and that being able to distinguish flicker and being to perceive that we distinguish it may be separate concepts.


2

This isn't a phenomenon, this is compression. It is simply how it works. Compression works by taking an input, runs it through some algorithms and then gets an output that matches up either exactly (lossless) or approximately (lossy) with the original input. It is not stored like normal video data as a set of pixels, but rather some form of data that ...


2

To understand this you need to understand how codecs actually work. A plain uncompressed video frame e.g. a single picture is pretty large. I'm talking about a bitmap, not a lossless encoded video, no encoding at all, just plain pixel information. Here simple example of a Full HD frame for some perspective: We have a resolution of 1920x1080 that equals to ...


2

A few good options to consider: If you disobey the 180 degree shutter rule, and shoot at a lower shutter speed, you'll get more motion blur in your shot. Whether or not this is what you're going for is up for debate (it'll produce a dream sequence - ghostly like effect), but it's worth trying out. Note that EVERYTHING in your shot with have increased ...


2

Given your are using a VPS this is no suprise (guessing you only have a single core with 1-3GHz) and you won't be able to crunch the conversion down to a few minutes. You can try using -c:v libx264 -presets ultrafast but I'd guess it will still take you about 45-60 minutes to encode. Also remove the -crf option when using a preset. Be advised that the ...


2

Probably better suited for Stackoverflow but I think its still a valid question for this SE. Producing theora(ogg) versions of your videos is actually redundant. Any browser version supporting ogg is also supporting webm. For questions like these I recommend using caniuse.com. If you compare webm with ogg you quickly see that you cover the same browser ...


1

For fixed camera shots, if you plan the shot so that they don't pass over any other actors, you can simply shoot them on one plate and shoot the rest of the actors on another plate. You then mask the one plate over the other so that they appear semi-transparent and possibly use a blurred difference mask for adding an edge glow. Greenscreening overall is ...


1

Are you sure the files your recorded have indeed a variable framerate? It sounds like you recorded with a constant framerate (even though you get a variable frame rate video feed) which introduced this "artifact" and the players then of course play it back with a constant frame rate even though they shouldn't. To properly convert variable frame rate footage ...


1

I use VideoHive - large collection of clips and affordable prices.


1

I don't know what you mean by human readable search terms, as opposed to keywords or tags? But for a meta search directory service I would recommend (know of) http://www.footage.net/ (If anyone knows of any additional search engine stock video directories, I would love to know about it as well) Otherwise, ya, you would be going through each service looking ...


1

Most topics have been very well discussed already, I just want to add a case were even more than 400hz is very much needed. As previously stated by Oddthinking, the eye and human brain don't work like a TV or Camera. This especially counts for cases where our other senses are involved. E.g. video games, high-frame rates of 60-120hz are very well perceived ...


1

As a gamer, I notice a huge difference between a regular 60hz monitor and a 120/144hz one. The smoothness of fast movements is impressive! BenQ L2420TE Asus VG248QE EDIT - Televisions have input lag, so it doesn't feel as smooth as these monitors.


1

RAM is not the critical part of a transcode, CPU is. Since it is working stream to stream, fairly minimal memory actually has to be required if the encoder is operating efficiently. The memory speed does matter for scratch space for the processor, but not so much the quantity. The CPU (or GPU if using GPU optimized encoding) is what does all the work and ...


1

As per my knowledge television sets are clocked to 60 hz refresh rate. As it goes on increasing like 120 Hz the pictures will look more smoother. but lets say for 200 performance will enhance a bit. But for 600 Hz or so our eyes will not feel much difference than 200 Hz. So as per my opinion its not necessary to have refresh rate as high as possible in ...


1

Libav has the tool avconv, which allows you to do that with the video filter setpts=PTS-STARTPTS. I haven't tried this, but the following should do the trick for you: avconv -i in.vob -vf 'setpts=PTS-STARTPTS' -c:a copy -c:v copy out.vob For more information you can check out http://manpages.ubuntu.com/manpages/precise/man1/avconv.1.html



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