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> New Max Uploading Size, 1gb
Ivan Milenkovic
post Dec 6 2007, 05:09 PM
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QUOTE (Dejan @ Dec 6 2007, 10:50 AM) *
It's great for those with unlimited upload, unfortunatelly I have only 7GB of transfer a month so I have to keep it as small as possible smile.gif

also when I was uploading the slow video for first lesson, i tried to upload 500MB file.. but it seems I had a trouble with net after two hours of uploading, received error message and was not able to continue

please consider the idea of FTP accounts for instructors smile.gif


You are sending a 500MB file? You can compress that easily to 150-200 without some big loss in quality man.


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Dejan Farkas
post Dec 6 2007, 05:39 PM
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at the end i managed to compress it to 35 MB, the slow videos, while the main one was 120 biggrin.gif

i will try to experiment with the flv files and let you know the results smile.gif


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Bogdan Radovic
post Dec 6 2007, 08:51 PM
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Do we actually need to upload videos in greater resolution than 320x240 since thats the resolution of videos displayed on site ? Do we gain anything from it? Now we can use less compression and greater bit rate..It will show a big difference definitely..


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Dejan Farkas
post Dec 6 2007, 10:51 PM
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Check my first lesson and see the difference

main video: AVI 720x576, Bit rate 705 kbps

slow videos: AVI XVID 320x250, Data rate 214 kbps, video sample 24 bit, 25 frames/second

the main video is clear, while i see some distortion on the slow ones unsure.gif


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Bogdan Radovic
post Dec 6 2007, 11:13 PM
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Yes but that distortion comes from main video being 705 kbps and slow ones just 214 kbps data rate ?? I don't think that video resolution matters..But I want to see others opinions..Thanks for answer..


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Ivan Milenkovic
post Dec 6 2007, 11:39 PM
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I don`t think we gain anything from bigger resolution because it is scaled down to 320x240 for display. Maybe there are options for displaying biggger pictures, like the 101 lessons that Kris made, but I don`t really know about that. Maybe Kris can shed some light on the subject..


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Vinod Saranga
post Dec 7 2007, 09:29 AM
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QUOTE (Milenkovic Ivan @ Dec 7 2007, 04:39 AM) *
I don`t think we gain anything from bigger resolution because it is scaled down to 320x240 for display. Maybe there are options for displaying biggger pictures, like the 101 lessons that Kris made, but I don`t really know about that. Maybe Kris can shed some light on the subject..




I agree.

But I think adding sharpness to final video make it more clear.I've never tried it.Will try in next one.I've seen that tip somewhere in the forum, I think Pavel said about that.


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Kristofer Dahl
post Dec 7 2007, 09:41 AM
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QUOTE (Bogdan @ Dec 6 2007, 08:51 PM) *
Do we actually need to upload videos in greater resolution than 320x240 since thats the resolution of videos displayed on site ? Do we gain anything from it? Now we can use less compression and greater bit rate..It will show a big difference definitely..


No, you don't need to upload larger resolution than that! smile.gif

"less compression and greater bit rate" sounds like a very good idea!

QUOTE (Dejan @ Dec 6 2007, 10:51 PM) *
Check my first lesson and see the difference

main video: AVI 720x576, Bit rate 705 kbps

slow videos: AVI XVID 320x250, Data rate 214 kbps, video sample 24 bit, 25 frames/second

the main video is clear, while i see some distortion on the slow ones unsure.gif


For the next lesson - you should be able to have a higher data rate, if you split the lesson up into smaller segments.

Also - when you have a resolution of 320x250, lesson maker will resize your video to 320x240.

QUOTE (Bogdan @ Dec 6 2007, 11:13 PM) *
Yes but that distortion comes from main video being 705 kbps and slow ones just 214 kbps data rate ?? I don't think that video resolution matters..But I want to see others opinions..Thanks for answer..


I think the distortion Dejan is referring to are the horizontal lines in the slower videos - I think this is called "interlacing". I am not sure how you can get rid of that - perhaps with higher bitrate? unsure.gif


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Vinod Saranga
post Dec 7 2007, 09:57 AM
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I think if the problem is interlacing answer is deinterlacing.

Higher fps may solve it ,
evenmore changing the codec of your video may also help.experiment yourself.I am not sure. smile.gif

This post has been edited by Vinod: Dec 7 2007, 09:58 AM


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Andrew Cockburn
post Dec 7 2007, 12:56 PM
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QUOTE (Kristofer Dahl @ Dec 7 2007, 03:41 AM) *
Also - when you have a resolution of 320x250, lesson maker will resize your video to 320x240.


Due to the processes involved, changing something that is already close will look worse than changing something that is further away in resolution (although its a little tricky to explain). I'm not an expert, but based on this I would say the choices should be to either upload it at the exact resolution that will be used (320x240) so no size conversion is necessary, or upload it a reasonable amount larger, exact multiples of the target size would probably be best, say 640x480.

Again, this is theory on my part (I am the theory guy after all!) - if any of you try this let me know if it improves matters.


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Kristofer Dahl
post Dec 7 2007, 01:12 PM
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This sounds very reasonable Andrew! smile.gif


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Muris Varajic
post Dec 7 2007, 06:10 PM
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Codec,Avi or Mov,etc
Must experiment,all of us wink.gif


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