[Kirk Wood]

I’ll retry two-pass. Shame it would take four or five hours though, but I suppose sacrifices must be made for quality eh.

See, I thought that, but I was confused as to what setting to do. Average 50, maximum slightly over? Maximum 50, average slightly under? Also, from my understanding you should use VBR for Youtube?

I might try something like 35 bit rate with two-pass, that way I lower render time and the quality doesn’t take a significant hit.

[Kirk Wood]

Me again. Glad someone else has been able to receive help from this thread. 🙂

I rendered a video today. Best quality, 50 bit rate and 720p (as per the original footage). The render’s file size is 12.8GB, and it is 39 minutes long. I’m okay uploading larger sizes due to recent upload speed upgrade. The render itself when played in VLC looks *perfect*.

However, I have uploaded said render to Youtube and despite being the only video with a 50 bit rate, the quality of the image seems quite different to the 720p videos I’ve uploaded before. It’s not too far off, but I’ve noticed the video blurs far more often during movement and intermittently than the others.

The *only* setting I changed this time around was the bit rate and disabled two-pass, as per suggestion regarding high frame rates. I should also note that I set both the maximum and average bit rate as 50; not sure if that’s an issue, but like I said the finished render is absolutely fine.

The *only* difference in my upload was that I uploaded a higher quality render.

Presumably this is a problem with Youtube’s encoding since the quality degrade is only noticed there, however I am wondering if the lack of two-pass, max/average rate or using such a high rate has influenced the poor quality in some form?

[Kirk Wood]

Oops, yes, that’s what I meant.

Well, I’ll play around with it a bit more and see what happens. Thank you very much for your advice.

[Kirk Wood]

Thank you for the explanation, however I’m still uncertain as to it’s usage in my scenario (and you’ll have to bear with me because this is new to me).

I’m recording with nVidia Shadowplay which saves footage in .avi format, my settings being 1080p, 60FPS at 50MBs.

My project properties are 1080p, field order Progressive Scan, 59.940 frame rate, rendering quality at Best, and deinterlace method as Blend Fields.

When rendering, I select .mp4 format, Mainconcept AVC/AAC, with a custom template based off the existing “Internet HD” template. Profile is set to High, frame rate is set to 59.994, field order is Progressive Scan, aspect ration is at 1.0000, reference frames is 2, deblocking filer is Enabled, Varible bit rate is checked, currently two-pass is checked, and at the moment I am currently experimenting with bit-rate. Progressive download is enabled.

With that in mind, what would your suggestion be in regards to using Two-pass or not? Since it’s Youtube, should I go with a lower bit rate at one-pass, or render at the original bit rate with two-pass? Something else.

Sorry for all the questions, just feel it’s best to ask someone who actually knows about this. 🙂 I appreciate your time.

[Kirk Wood]

Thank you for your response.

Since posting this I have uploaded a few more videos and reduced the file-size by about 2GB by playing around with the bit-rate. As luck would have it, however, this is no longer an issue for me as our ISP upgraded our upload speed.

“Two pass encoding with create better quality Variable Bit Rate (VBR) files because it allocates bits better. This helps with low bit rate files but is a waste of time with high bit rate files.”

What would you consider to be the bit-rate threshold between using Two-pass encoding and ignoring that option? I’ve been using two-pass for all renders, varying from 20-50 bit rate. Presumably rendering a video at 50 bit rate as one-pass is sufficient?

[Kirk Wood]

I see. Well, that’s a shame. Are you aware of any plans to support newer series of cards?

Perhaps you could help me with another issue. Is it Sony AVC or Mainconcept I should use for Youtube 1080p 60fps gaming footage? I’ve read posts on various forums, including this one, that suggest either one is better than the other, but I have read something to do with Mainconcept now being the preferred method since they changed how the templates were listed…or something.