5

There are, in fact, several standards on audio/video or lip sync. The problem is, they can't all agree on what the acceptable error is. What is well understood is that if the audio lags the video it is less noticeable, because that is natural. Something that is further away will be seen before it is heard. In the list below, a negative number is the audio ...


4

Do the math If you want to align your text using percentage offsets or any other 'round' number in pixels, you just need to perform some simple calculations. For example, 10% from the bottom of a 3840 x 2160 canvas: 2160 - (2160/10) = 1944 Since you want your text to be vertically centered on the line at 10%, you will have to modify this by half your font-...


3

Generally, you want to mix color for ideal conditions, not the common situation. It is up to people to do the best they can to adjust their systems to support a vivid and clear image. If you mix to try to make it look the best on some "average", not only will it look bad on any good displays, but it will also look bad on any well adjusted average displays. ...


3

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 ...


3

Yeah! Welcome to the good ol' world of analog television. When they originally introduced color television and put a high frequency chroma signal on top of the black- and white luma signal, they had to introduce a freqeuncy shift to prevent the signal from bleeding over into the audio .... oh, you don't want to know. Srsly! Even in times of digital video ...


3

I recommend you do a few things. Take an online course in video editing. You can either sign up for one at something like linda.com, or even just go to YouTube and search for video editing. There are thousands of tutorials which can point you in the right direction. If the above isn't reasonable, take a class at your local community college. Many offer ...


3

Most modern codecs will support whatever frame rate you throw at them. The choice is more of an artistic decision than a technical one. For the best quality, you should match the frame rate of your source or some even multiple there of. If you can choose on your source, then choose according to the feel you want. 24(23.976) is more "cinematic" and is ...


3

If your source footage is interlaced, deinterlace it. If your progressive frame rate is a constant 23.976, 24, 25, 29.97, or 30 fps, then keep the frame rate as it is, unless you require a very low bitrate and want to halve the frame rate. These are all widely supported frame rates, although other arbitrary frame rates below 30 fps will often work as well. ...


3

Somewhat of an duplicate of: Can I manually change an .mp4 to .m4v by changing the extension in the Finder (mac) or explorer (win)? MP4 and M4V are essentially the exact same thing, M4V is usually used to indicate video only files but some sofware/companies are using it for standard MP4 files with video AND audio (lots of Apple software f.e.). It's just a ...


2

H.263 was a sole development of the ITU but I wouldn't bother all too much with the specified use case of video conferencing. It's a codec with the main purpose of improving the compression compared to older codecs which of course is beneficial for video conferencing where bandwidth is a very limiting factor, especially at the time the codec got developed. ...


2

Yes, MPEG-2 video is stored as YCbCr, but video editing programs (like Cinelerra) convert the samples to RGB for processing during editing. That range is 16-235. From Wikipedia on YCbCr Analog YPbPr from analog R'G'B' is derived as follows: To get a YUV output in the 16-235 range, the input RGB is also limited.


2

The first anime pic is throwing me off, but it seems to be an artifact of how interlaced analog signals were structured and displayed. For analog NTSC there is a total of 525 scanning lines of which originally 483 lines were visible (241.5 visible lines + 21 lines of vertical blanking per field) Update: this answer at the electronics site gives the ...


2

Native resolution is always better than non-native. If it only has a resolution of 720p, then it would have to be down-converting to that resolution which means it has to blend pixels which can produce artifacts from the pixel blending. (Notably, softer edges is the most likely.) Update: I'm sorry, re-reading, I noticed that it isn't native for either ...


2

The UK PAL VHS tapes will play back in a German PAL deck. The actual method of audio recording is not related to the PAL specification. VHS records up to two linear audio tracks. HiFi capable decks record additional two HiFi tracks that are multiplexed with the video signal. I don't remember the details. A non-HiFi deck will ignore the HiFi tracks and use ...


1

The resolution is correct, but your understanding of how that is measured is confused. Analog video consisted of a series of continuous horizontal lines. Don't confuse the number of vertical lines with "lines" of horizontal resolution. When you talk about horizontal lines you're actually talking about how many line pairs—or literally how many ...


1

I would try cleaning the playheads (there are special tapes you can put in for cleaning) and/or checking the playback speed. Those are the two most common causes of that issue on my GL2.


1

I don't think it has been an issue for some time. I've been using Premiere since version 5 and don't seem to recall ever having a problem with exports though I don't recall my work area ever extending over a gap (though I certainly had many projects where there were gaps between work areas.) I did verify that in CS6, it is no problem.


1

This is a document from the ITU : http://www.itu.int/rec/R-REC-BT.1120-8-201201-I/en that specifies Digital interfaces for HDTV studio signals. This kind of signal is commonly carried on an HD-SDI physical layer.


1

The ATEM works with 29.98 fps. The PTX Optics camera is 30fps. You need one of this in between to fix the fps issue. http://www.bhphotovideo.com/bnh/controller/home?O=&sku=1091826&gclid=COm6mIXnicgCFdgLgQodNIACbQ&is=REG&m=Y&Q=&A=details


1

After lots of problem-solving and testing of different combinations (including two versions of black magic video switchers, the studio 4K, and the television studio), I got rid of the black magic. it was the best decision I made in a month. It turns out that this is a very common problem with the black magic, along with constant software crashing. Now I'm ...


1

Robert, I too am thinking about buying this camera to use with my ATEM switcher. The ATEM can be quite finicky regarding compatibility. Have you tried it with straight SDI into the ATEM? If this does not work try adding a cheap sdi splitter from Kanex etc to the line. The camera needs to be set to the exact right settings to work, for example 1080i. The ...


1

The logo on the manual I could find indicates that it was standard 8mm, not Hi8 or Digital8. If you are in a PAL region, then most likely it is the PAL version of 8mm. You should be able to use any PAL based 8mm playback deck or camcorder to play the tape back. You then be able to use a standard video capture device to digitize the video that you playback....


1

On a side note, I believe the power is required for the analog to digital converter in wireless transmissions, and not the signal itself, since there is +5V DC power running through one of the pins. So you might actually have better luck searching for USB powered signal converters, because once the signal is digital, you're home free. Something like this: ...


1

There must be a setting on the camera that you're not describing which causes this shift. The difference is exactly the same as 24 vs 23.976 or 30 vs 29.97, which is the ratio 1000/1001 -- the 'color vs mono' ratio that originated with NTSC color and should have completely ended with digital standards. Maybe that will offer a clue to finding the setting. In ...


1

Not all video formats use square pixels. In this case, the pixel's are oval (anamorphic wide screen). This comes indirectly from the film days when anamorphic lenses would condense a wide screen image on to a narrower strip of film. The same concept was later applied to squeeze wide screen videos in to video formats that wouldn't normally support them. ...


1

Any VCR to PC capture device should do the job.IF you can find a VCR which can play PAL. Usually these type of players are sold in the Indian or Arabic neighbourhoods. I think it is not worth the effort to buy one and deal with the capturing. Simply find a place close to where you live, where they can do it for you. The average cost is $5 to $10 per tape. ...


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