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scroll ahead to 4:14 to see what happens if you wear clothing that's the same color as your chroma background...

https://www.youtube.com/watch?v=ERwzlEPgbjk

(click the timeline between the O and P in BLOOPER and you'll be pretty close to the 4:14 marker)

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I think that the pixelation has to do with the codec, and perhaps frame rate aliasing issues. Keep in mind that the whole point of video compression is to reduce file size. This is accomplished by leaving as many pixels the same from frame to frame as possible; at least that's one of the methodologies. Codecs also 'group' like formatted pixels. You don't notice it when there isn't a bunch of change of color because the visual system is trained to see change (that's how it's so relatively easy to see satellites on a clear night). With the color chase, you are making the codec do what it doesn't want to. It's trying to group and keep things static, but you interrupt that with color changes that aren't necessarily part of the compression's expectation.

Try changing the codec - but your comment that the chase is kind of cheesy is right on.

I would work in some live footage as well with audience participation as part of the shots.

Last edited by rockstar_not; 09/10/13 12:59 PM.
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Originally Posted By: rockstar_not
I think that the pixelation has to do with the codec, and perhaps frame rate aliasing issues. Keep in mind that the whole point of video compression is to reduce file size. This is accomplished by leaving as many pixels the same from frame to frame as possible; at least that's one of the methodologies. Codecs also 'group' like formatted pixels. You don't notice it when there isn't a bunch of change of color because the visual system is trained to see change (that's how it's so relatively easy to see satellites on a clear night). With the color chase, you are making the codec do what it doesn't want to. It's trying to group and keep things static, but you interrupt that with color changes that aren't necessarily part of the compression's expectation.

Try changing the codec - but your comment that the chase is kind of cheesy is right on.

I would work in some live footage as well with audience participation as part of the shots.

After really troubleshooting the pixelating I discovered the issue. There was no issue in real time. No issue when recording to the Webcam capture software. The only issue was recording using Video Pad software. The record bit rate was WAY too low. I upped the bit rate and it looks great.Except the sunlight in the windows.


John
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Originally Posted By: silvertones
Originally Posted By: rockstar_not
I think that the pixelation has to do with the codec, and perhaps frame rate aliasing issues. Keep in mind that the whole point of video compression is to reduce file size. This is accomplished by leaving as many pixels the same from frame to frame as possible; at least that's one of the methodologies. Codecs also 'group' like formatted pixels. You don't notice it when there isn't a bunch of change of color because the visual system is trained to see change (that's how it's so relatively easy to see satellites on a clear night). With the color chase, you are making the codec do what it doesn't want to. It's trying to group and keep things static, but you interrupt that with color changes that aren't necessarily part of the compression's expectation.

Try changing the codec - but your comment that the chase is kind of cheesy is right on.

I would work in some live footage as well with audience participation as part of the shots.

After really troubleshooting the pixelating I discovered the issue. There was no issue in real time. No issue when recording to the Webcam capture software. The only issue was recording using Video Pad software. The record bit rate was WAY too low. I upped the bit rate and it looks great.Except the sunlight in the windows.


John, the bitrate used IS part of both frame rate and codec that is being used. Inside of the recording software, it is using a particular methodology to convert what is coming in analog from the camera to digital format. There is likely live compression happening when this is being done. There is certainly sampling happening, which is where the frame rate aliasing which Mac referred to can occur. And unless you are recording video full smoke, it's likely doing compression while saving the video files at the recording process. Then when you go to save the file, you likely have some quality options which are again compression algorithms at play. don't be surprised if you upload the video to YouTube, you see this pixelation thing raise it's ugly head. Upload in the highest quality that you can.

-Scott

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I'm really a beginner here when it comes to video.All I can tell you at this point is I'm now recording at the highest MP4 bit rate available to me in the software.I will upload these files to YouTube untouched.I guess?


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YouTube will do it's own compression. It's like uploading to soundcloud, it forces it's own compression algorithm on your upload.

There are video analogies to what we've been doing with audio all over the place. Soon you'll be flying. Btw sound card thread in the recording forum needing your kx expertise

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John this is so cool, you're my hero buddy. I can't tell you how many times I've been told I need to do some vids but I'm like the kid with his finger up his nose going wuuuttt?? I can watch vids all day long but producing one? No clue.

There's a big thread on Keyboard Corner about this and the guys there said the same thing Mac said earlier. It's easily done with a good HD camera with XLR inputs for sound so it just plugs into your mixing board or you use high quality mics. Those cameras start at $700-$1,000 so I stopped thinking about that. If you're able to do it for cheap, that's fantastic.

Bob


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Originally Posted By: jazzmammal
I can watch vids all day long but producing one? No clue.

There's a big thread on Keyboard Corner about this and the guys there said the same thing Mac said earlier. It's easily done with a good HD camera with XLR inputs for sound so it just plugs into your mixing board or you use high quality mics. Those cameras start at $700-$1,000 so I stopped thinking about that. If you're able to do it for cheap, that's fantastic.

Bob

Bob,
do you have any kind of camcorder or web cam? even a cheap one?
In the same sense that none of us has a $100,000 recording studio but we still crank out songs that are "pretty good", it's possible to make a video that's "pretty good" without dropping a truckload of cash.

With an abundance of free and/or low cost video editing software available, it's not cost prohibitive to jump in and start experimenting. Don't worry about spending ANY money until the free stuff that's already available starts to hold you back.

Did you happen to watch Jo's video? I don't think she used anything but her family's camcorder and an entry level paid version of a software that also has a free version... and it turned out great!

You're a smart guy. Most of this software is fairly intuitive, you'll figure it out with a small time investment.

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I should be able to figure it out later but right now I'm in the middle of setting up a whole new home entertainment "experience" based on a cable card, Windows Media Center and running a 25' HDMI cable through a hole I put in my closet wall so I'm now using my living room 55" TV as a PC monitor while keeping the PC itself in the bedroom with my other 32". One of the things I get to do is use Biab and other music software in the living room where my oh so nice Altec Model 14's are and they really sound awesome. But, that's just for playback, my actual studio and keyboards are in the bedroom. I have both the 55" and 32" monitors on an HDMI switch so all I have to do is step into the living room to check the mix on the big system plus I'm watching YT vids and other PC stuff in the living room as well. So far I'm loving it but I'm not completely finished with that project yet.

Producing some vids will be next on my to do list and this thread is perfect timing because I haven't looked into it at all except for that thread on Keyboard Corner. No, I don't have any kind of video cameras at all except for my older Android phone. I'm thinking by the time I'm ready for that John will be done with his project and I can basically copy what he's doing.

Bob


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