Some questions about HD video

[crusher]

Hi all, I have some questions regarding video taken with HD camcorder.

1) When I play MTS files on my laptop, I can see the "interlacing" effect, is it because my laptop is not powerful enough to play HD video smoothly? Or is it because the refresh rate of the monitor (60 Hz) doesn't match the frame rate of the video (50i)?

2) Can HD video of any frame rates play on just any HD tv?

3) Anybody using Adobe Media Encoder CS4 to convert MTS files? Can somebody explain to me what all the Basic Video Settings mean? Eg Field Order, Pixel Aspect Ratio, Profile, Level etc. I am pretty confused about the relationship between frame width & height and Pixel Aspect Ratio. If I choose a frame size of 720 x 576 (PAl) and a Pixel Aspect Ratio of 16:9 (widescreen), what will be the frame size and aspect ratio of the output video?

 

[jaegersing]

1) When I play MTS files on my laptop, I can see the "interlacing" effect, is it because my laptop is not powerful enough to play HD video smoothly? Or is it because the refresh rate of the monitor (60 Hz) doesn't match the frame rate of the video (50i)?

The footage you are shooting is probably 1080i, which is interlaced, therefore when you play it on a PC monitor you will see the interlacing artifacts. You can use a different media player such as VLC which will deinterlace the video during playback, or else you could use a video editing program to deinterlace and render the file out as progressive.

2) Can HD video of any frame rates play on just any HD tv?

No. The most common supported frame rates are probably 59.94i, 50i, 24p, 25p, 29.97p, 59.94p and 50p. It is advisable to make sure your final video has a supported frame rate.

3) Anybody using Adobe Media Encoder CS4 to convert MTS files? Can somebody explain to me what all the Basic Video Settings mean? Eg Field Order, Pixel Aspect Ratio, Profile, Level etc. I am pretty confused about the relationship between frame width & height and Pixel Aspect Ratio. If I choose a frame size of 720 x 576 (PAl) and a Pixel Aspect Ratio of 16:9 (widescreen), what will be the frame size and aspect ratio of the output video?

I'm not familiar with Media Encoder, but these terms are quite standard.

Field order applies to interlaced video. The 2 fields in each frame are sampled at slightly different times, so if the field order is set wrongly the video will be very jerky.

Pixel Aspect Ratio is the shape of the pixels used to show the video image. On a PC monitor the pixels are usually square, so the pixel aspect ratio is 1:1. For digital video standards, non square pixels are often used, in order to simplify the design of the sampling circuitry. There is also the Frame Aspect Ratio, which I think is causing you some confusion.

For non widescreen SD PAL video, the frame aspect ratio is (almost) 4:3, and the resolution is 720x576. Since 720:576 is not the same as 4:3, that means the pixels are not square. You can check out http://en.wikipedia.org/wiki/Pixel_aspect_ratio for more details on this.

For the example you mention, 720x576 widescreen video would have a frame (not pixel) aspect ratio of 16:9, and a pixel aspect ratio of 16/11 which is 1.4545.

Simplistically, Profile and Level are some of the different settings you can choose for MPEG encoding. This is quite a big subject. To begin with, just take the default settings and post a question if you get any problems.

 

[crusher]

Only 1 respond... thanks for the reply, I will do some research on my own.

 

[jaegersing]

Only 1 respond... thanks for the reply, I will do some research on my own.

Sorry if my response was not sufficient for you. Yes it is good to do your own research, if you find out any good information please share with all of us.

 

[keem86]

Hi

I wanna start videography...where can i learn? any classes?

 

[amentg]

Hi Jaegersing,

can you tell me how do I convert an HD mpeg files, shot from a Canon digital camera, so that I can get it edited as a normal AVI files in Vegas 8 software.

 

[jaegersing]

Hi Jaegersing,

can you tell me how do I convert an HD mpeg files, shot from a Canon digital camera, so that I can get it edited as a normal AVI files in Vegas 8 software.

What camera is that? My Canon DSLR video files are saved as MOV.

 

[amentg]

Sorry its not Canon, but a Sony Cybershot model DSC W350. save in M4H mode.

 

[jaegersing]

Sorry its not Canon, but a Sony Cybershot model DSC W350. save in M4H mode.

Ha ha, so it is not your camera? I think that is an mp4 file. You can try downloading Super converter, which may be able to convert the mp4 files into whatever format you want.

http://www.erightsoft.com/SUPER.html

Try it and let me know if it works. Anyway it is free. The download link is hidden a bit, so you will need to search for it.

 

[amentg]

Oh Yes that camera is not mine, hehehe.

Anyway I will try to go to your link and see, Any feedback, I will come back and post.

Thanks Richard.

 

[amentg]

Hi Jeagersing,

:thumbsup:Ok the link that you lead me through is workable men. True as you said it is a bit hidden but once I found it, its like a treasure chest....everything is beaming.

Thanks Bro.:thumbsup: