[Paolo Sa]

Hey Eric, thanks for replying. I’ve been trying to figure this out in the last few days, but I haven’t kept this thread up to date (sorry). This is what I found out:

1. MediaInfo reports 4:2:0 for my capture card raw footage, however using 4:2:0 in Lagarith in Vegas produces a color shift that’s not there if I use RGB, so when I export the video from Vegas I use RGB.

2. I found out how to set the color range to 0-255 in Handbrake (fullrange=on), however that washes out the colors, so I went back to limited range.

3. I did a lot of render tests and this is what happens:
RAW file -> Vegas Lossless AVI RGB 4:4:4 (Lagarith or UT Codec): no color shift.
RAW file -> Handbrake: no color shift.
RAW file -> Vegas Lossless AVI RGB 4:4:4 (Lagarith or UT Codec) -> Handbrake: COLOR SHIFT.

I don’t understand what’s going on, the Vegas output and the raw file are virtually identical. If I could I would skip using Vegas but that’s not an option because I need to edit my videos and Vegas suits my needs.

[Paolo Sa]

Well I did some tests and using RGB in Lagarith produces the best results, so I assume that’s the correct color space. Now I have another question, exporting out of Handbrake gives me a limited color range and I can’t seem to figure out how to get the full 0-255 range. What can I do?

[Paolo Sa]

Thanks for replying. I did that already and MediaInfo says it uses 4:2:0, but I don’t get it, if the content was actually 4:2:0 wouldn’t I see artifacts like shown here?

https://www.geeks3d.com/20141203/how-to-quickly-check-the-chroma-subsampling-used-with-your-4k-uhd-tv/

[Paolo Sa]

Thanks for your reply. I have a couple of questions about your post:
1. What do you mean by “average person”?
2. How has lenght of clip anything to do with the bitrate/quality?

I’m working with 720p content. 0.40 bits/pixels means:
1280*720 = 921600 pixels
921600*0.40 = 368640 bits
368640*29,97 = 11048141 bits per second

So around 11 mbps, which is pretty close to what I use (10mbps). Your post was really helpful, thank you!

[Paolo Sa]

That link was helpful, thank you. However, I was looking at something a bit different. That link is about the lowest bitrate you should choose without sacrificing quality too much, I was looking for the opposite: I was looking for the lowest bitrate after which you don’t see any improvement in quality. I know I could use 100mbps bitrate, but I also know that if I use 50mbps I won’t be able to tell the difference. I personally render at 10mbps at the moment, but I was wondering if there’s a way to calculate a specific value for what I’m looking for.

[Paolo Sa]

I did as you said and the flickering decreased drastically. Thanks for the support.

[Paolo Sa]

Thank you very much for your help. Unfortunately I’m still experiencing the same issue. I set both Record Density and Sampling from low to high. My global illumination settings are the following:

https://gyazo.com/e6cc33adbf560061e12907128d8a98df
https://gyazo.com/e2b438ceba9f920519dcd969aed16b30
https://gyazo.com/0d55a92c2b49eed78acf6b31b6281d90
https://gyazo.com/e8b1b824e30e9c31c4779e760f519da4
https://gyazo.com/f28779627354ba31b806374a9de80e1d

I’m lighting the scene with both lights and polygon lights. The “GI Area Light” switch in the material settings for the polygon lights is enabled. Do you have any other suggestion?

[Paolo Sa]

Thank you, Full Animation did the trick! I have another problem with this scene tho, and I was wondering if you could help me with it as well? The lights reflections on the dominos seem to flicker and I don’t know why. Here’s the video:

https://youtu.be/QCeuCXXFAFY

[Paolo Sa]

Yes

EDIT: Global Illumination is the problem, disabling it removes the issue. However I want it on, do you have any suggestion on how to fix this issue?

[Paolo Sa]

I’m still investigating. I found that the problem is in the m2ts file and when I render the clip the problem pass from the m2ts to the mp4 file. I’m trying to figure out what the problem is… I tried not to disable resample, not to change the ratio, to render a small clip of 4 seconds instead of a clip of 21 seconds, but the crashes still occour… Any idea?