Hot answers tagged video
7
The main advantage is cost. There are two main types of imaging sensors currently used, CMOS and CCD. CMOS has historically been used in digital cameras (because of the higher quality images it can capture, the lower cost, and the fact that digital cameras only have to capture a single moment).
CCDs on the other hand have been historically used in video ...
4
48 to 25 should be better because you have more frame information to interpolate, though the contents of the clips could also matter. If all the 48 fps clips are high speed motion while the 25 is relatively static shots, then it will probably interpolate better.
The key is that frames are going to have to be guessed at and the less time that passed from ...
4
DVD and Blu-Ray content makes massive use of lossy encoding.
An easy way to see for yourself is to find a dark scene in a film, and then pause it. If the only issue was a limited number of black levels, you would expect to see a stepped gradient curve from the darkest region to the lightest region. Of course, if true 24-bit color was being used, the ...
3
This is really going to come down to what the terms of the EULA is. It should outline what rights you have to use the Apple provided contents. Most likely you would be fine as included assets are typically intended for reproduction. It might be trickier if you were going to sell copies, but a commercial is probably ok.
As far as using it as commercial ...
3
Your facts mislead you. Lens magnification and size have nothing to do with video or stills. They have to do with sensor-size.
Your DSLR has a large sensor and requires a large lens. The digital video camera you refer to has a small sensor and requires a small lens. You can very easily pick some random examples to show the opposite! Take a Canon Powershot ...
3
Your guess is correct. That would be fully uncompressed, true to its settings.
You're right, there's only so much data that disks can handle, so there's compression that does need to take place. We can't always notice it. That's why there's different formats (MOV, MP4, WMV). They all have their individual compression types. Compression, really, is just ...
2
Amazingly, the best place to start with a question like this is Youtube. Believe it or not they have help file that explain the process with quite a bit of detail:
https://support.google.com/youtube/bin/answer.py?hl=en&answer=1722171&topic=2888648&ctx=topic
On Youtube itself many others have offered up video tutorials on how to do it:
...
2
I have a large set of jpgs that I want to convert to a video losslessly
You can probably just mux the jpg images:
ffmpeg -r 30 -i input%03d.jpg -codec copy output.mkv
Then compare the md5sums of each frame with the framemd5 muxer:
$ ffmpeg -i input%03d.jpg -f framemd5 -
0, 0, 0, 1, 460800, 29bcc2db3726c7dfec1826c5740f603f
...
1
You can create an avi animation as a series of png images ( png is lossless so the jpeg => png conversion should not degrade your pictures ):
if your images a named img_0001.jpg
ffmpeg -r 25 -start_number 1 -f image2 -i "img_%04d.jpg" -vcodec png video.avi
where "25" is the frame rate you want in the resulting video. -start_number is not needed if it ...
1
You would need a device that supports HDCP if your output source is utilizing it. That's the entire point of the system. The video signal is encrypted and will only exchange the data with a device which can cryptographically authenticate itself as an authorized HDCP receiver. Getting that certificate requires proving that they are going to follow the rules ...
1
For distribution to theaters, typically the files are several hundred gigabytes to a terrabyte per film (depending on the quality level that they choose to distribute). Even for cinema, some compression is generally used though the quality is still higher than bluray. Even if they choose lossless, compression can still probably cut it down by a significant ...
1
I've not heard of it referred to as a style. The only thing I could imagine it would be is trying to emulate a style similar to the voyeuristic feel which would probably be made up of roughly shot and edited clips of what would normally be a private, intimate scene, but I am not familiar with a "voyeur shot" as a thing.
1
You can simply transform the video to be vertical within the normal frame. I'd do it using a nested sequence that way you can avoid having to alter your main full quality sequence. Simply make a new scene, drag your existing scene in to it. Click on the clip, go to Effects Control. Expand Motion control and adjust the rotation, scale and position as ...
1
The best quality output that your LaserDisc player has is S-Video, so you will want to get a capture device that supports S-Video input.
Your laptop has three inputs that could be used. You have 4 pin firewire, ExpressCard34 and USB2.0. The USB solutions are the cheapest, but also generally the lowest quality. Either a firewire based external adapter or ...
1
Since your intentions seem a bit weird, I'll give a weird suggestion; if a video consists largely of a still image, then any decent compression algorithm will use almost no space in storing that length of time. So you'll notice if you go to "watch" a track someone's uploaded to YouTube with only album art for its image, the video loads very quickly.
This ...
1
I tried using Miro as well to transcode H.264 MP4 into VP-8 WebM so that Firefox would play using HTML5 rather than a Flash fallback.
But at least when the mp4 source was exported from Premiere then the Miro conversion did not work properly
it finished in my case, but the webm file would always start to play from the last second of the video for some ...
1
Are you sure that the Lenovo and 2011 MacBook support HDMI out via their displayPort? Native DisplayPort signals are not compatible with HDMI. What a DisplayPort to HDMI adapter actually does is simply put a DisplayPort that supports HDMI signaling in to the appropriate mode to send an HDMI signal, but it is not a required part of the DisplayPort standard. ...
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