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basic compression : motion presentation to 800x600 LCD

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Alex Jones
basic compression : motion presentation to 800x600 LCD
on Sep 16, 2008 at 11:10:30 pm

Hi, total newbie to video,so any help will be much appreciated, so..

I'm building a presentation in motion 3, basic 800x600 presentation and output is to a crappy 800x600 LCD picture frame. It needs to be MPEG as this is the only motion video that the frame can play.

I need to figure out the best compression rate as I'm trying to compress with Mpeg-1 and it comes out looking terrible, is it because it is scaling down? The picture is totally blurry and the words are unreadable?

Anyway, would love some help as really enjoying the video experience so far.

thanks,
Alex.


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Daniel Low
Re: basic compression : motion presentation to 800x600 LCD
on Sep 17, 2008 at 7:41:24 am

If you have to use MPEG, use MPEG-2 or MPEG4 (H.264) rather than the ancient MPEG-1.

What compression tools do you have?

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Daniel Low
Re: basic compression : motion presentation to 800x600 LCD
on Sep 17, 2008 at 1:35:38 pm

Sorry - I should have asked what types of MPEG does the picture frame support?

Do you have a link to a product spec page for it?

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Alex Jones
Re: basic compression : motion presentation to 800x600 LCD
on Sep 17, 2008 at 5:13:05 pm

Hi Danny,

yeah, I'm going to try mpeg4 again, it's one of these cheap $150 no name LCD Frames, the specs are really helpful saying multi-media formats supported are MP3/JPEG/JPG/DIGITAL VIDEO!
I can get mpeg1 to work so I'll give the others a try and get back in here.
thanks,
A.



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Alex Jones
Re: basic compression : motion presentation to 800x600 LCD
on Sep 17, 2008 at 5:35:48 pm

okay, so compressed to mp4 and it works on the LCD! I checked it in the split preview on my machine and it looks great, but again on the frame it looks terrible. I think the LCD just can't handle the graphics?

A.



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Daniel Low
Re: basic compression : motion presentation to 800x600 LCD
on Sep 17, 2008 at 7:55:38 pm

What settings (frame size and datarate) are you using?

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Alex Jones
Re: basic compression : motion presentation to 800x600 LCD
on Sep 17, 2008 at 8:49:55 pm

the actual frame has a res of 800x600. here's how I compressed. And now, the frame isn't even playing the mp4?! Totally duff frame I think!

Name: MPEG-4
Description: MPEG-4 video with AAC audio at 48 kHz. Settings based off the source resolution and frame-rate.
File Extension: mp4
Estimated file size: 4.76 MB
Audio Encoder
Format: MPEG4
Sample Rate: 44.100kHz
Channels: 2
Bits Per Sample: 16
AAC encoder quality: high
Data rate: 64 Kbps
Video Encoder
Format: MPEG4
Width: (100% of source)
Height: (100% of source)
Selected: 800 x 600
Pixel aspect ratio: Square
Crop: None
Padding: None
Frame rate: 29.97
Frame Controls: Automatically selected: Off
ISMA Profile: 0
Variable bit rate, medium quality
Hinted for streaming server with
packet size: 1450 bytes
and packet duration: 100 milliseconds
Allow Podcasting information: Off




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Daniel Low
Re: basic compression : motion presentation to 800x600 LCD
on Sep 17, 2008 at 10:20:40 pm

Set the frame size of your encode to 640x480

Turn off 'Hinted for streaming server'

That might help.

You've still not said what software you are using to do this compression with?

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Please post back saying what solved your problem. It could help others, and saying 'thanks' is free!


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Alex Jones
Re: basic compression : motion presentation to 800x600 LCD
on Sep 17, 2008 at 10:23:13 pm

I'll give it a try. Oh, and using Compressor 3.
thanks for all your help!
A.



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Daniel Low
Re: basic compression : motion presentation to 800x600 LCD
on Sep 17, 2008 at 10:40:41 pm

You also need to set an explicit datarate say 1500Kbits/ rather than just 'Medium Quality'

Don't forget to deinterlace if your source material is interlaced.

It's also worth upping the contrast a bit for picture frame devices

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Please post back saying what solved your problem. It could help others, and saying 'thanks' is free!


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