Blury Mpeg file need help

[Hitmandj]

Hi i have a problem when encodeing to mpeg2 . When i view my orginal avi dv captured file there is no blur on people or objects when the camera is moving. But when mepeg is encoded i see a slight blur on people and objects when the camera is moving.

My camera is Sony tvr dcr 950e it has Progressive Shutter System(does it say anything)

I am using a standard DAzzel capture card and using MovieXone 4.0 to capture my video. I then edit using adobe primere 6.5 and encode using frame server and tmpeg. My tmeg setting is the standard dvd pal.


Why could this be happening. this is notice both on screen and tv.

[SaSi]

Progressive shutter probably means progressive scan, that means the video is not interlaced. You must take that into consideration when encoding.

Tmpgenc settings for DVD pal are a bit generic. Additionally, encoding mode plays a role in quality.

If by blurry you mean objects appear pixelated, then you are having bitrate starvation problems. This means the moving picture requires a higher bitrate than the preset value.

If on the other hand by blury you mean the edges of objects appear to have a comb effect - edges appear as zig-zags, especially for black objects on light background, then your problem appears to be caused by incorrect handling of intarlace (or non-interlace).

Can you be more specific on the blurry effect? The solution depends on what exactly is the problem.

[Hitmandj]

Thanks for your help

It becomes blur on edges of people or objects when the camcorder is moving.

pluss i keep a contant bitrate of 7or 8mb

hope to hear form u soon

[SaSi]

A constant bitrate of 7 or 9 MBPS is highly unlikely to cause blurry effects (actually what is caused is called pixelation, i.e. pixels become larger because the information in the bitrate is not enough to show pixel details therefore instead of pixels you get blocks. These are macroblocks that can be either 8x8 or even 32x32 pixels in size).

Your problem appears to be the combing effect. It has slight differences when you encode an interlaced source in non-interlaced mode or encoding a non-interlaced source (progressive) in interlace mode.

In Tmpgenc, try the following:

In Settings, in General encoding parameters, select Non-Interlaced encoding in place of Interlaced. In Advanced, select Non-Interlaced source in place of interlaced. If I have guessed correctly, this will cure the effect you get and even give you better compressibility.

If it does not solve your problem, can you playback the stream with, say, Media Player, pause at a scene that makes the effect obvious, capture it in jpeg and attach it with your comments? A picture is worth a thousand words!

Regards

[Hitmandj]

Hi i did change the settings on tmpeg, andi had no luck

But the image shows that all imaages become blury at there edges when the camera is moving.



or go to here to see image

https://www.videohelp.com/forum/images/guides/p459081/my%20pic2.jpg

[DJRumpy]

Part of this looks like bit noise, which doesn't make sense at 7-8Mb/sec. This also looks like interlaced video that's been de-interlaced. Also, what motion prediction settings are you using in TMPGenc?

[Hitmandj]

I have intrlased the video, as it become interlased when i capture with a dv card. But my camcorder has progrssive shutter, so the captuing should be progressive scan. I am currecntly usiong the highest motion setting which makes the enncoding slow. If i do not interlases it i see these wird line appear

thanks for your help


Posted: 2003 Feb 21 15:56

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Part of this looks like bit noise, which doesn't make sense at 7-8Mb/sec. This also looks like interlaced video that's been de-interlaced. Also, what motion prediction settings are you using in TMPGenc?

[DJRumpy]

I don't have a cam, and I'm not familiar with a 'progressive shutter'. Perhaps someone with experience in this can help. Your image looks like a botched deinterlace to me.

The lines your referring to are simply interlace lines. You will see them on your pc, but you should not see them on your television.