Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Video Encoding > MPEG-4 AVC / H.264

Reply
 
Thread Tools Search this Thread Display Modes
Old 6th December 2009, 05:12   #21  |  Link
Keiyakusha
契約者
 
Keiyakusha's Avatar
 
Join Date: Jun 2008
Posts: 1,567
Obviously every file on Youtube gets reencoded with its own tools and settings. If the file you encoded locally looks good - you can do nothing about crappy quality on youtube.
Keiyakusha is offline   Reply With Quote
Old 6th December 2009, 06:37   #22  |  Link
AiDz0r
⃪ ͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤ ͤͤ
 
AiDz0r's Avatar
 
Join Date: Nov 2009
Location: Australia
Posts: 54
Here's another video from youtube which is the best, and he says he did from FFDSHOW video encoder? so thats better then x264?.


This is what he reccomended for me..
1-
2-

so the funny thing is that this is also using H264 and x264 over FFDSHOW with AVI container.
AiDz0r is offline   Reply With Quote
Old 6th December 2009, 16:36   #23  |  Link
dstln
Person
 
dstln's Avatar
 
Join Date: Jul 2009
Posts: 58
Also keep in mind that youtube uses really low bitrates (relatively) for their content and fairly poor settings, meaning the results on fast-motion gameplay easily may not be as good as you've hoped. But it shouldn't be quite that bad if it's flagged for hd.

But basically (as you've already seemed to guess), you take the massive raw output, reencode intermediate (as transparent as you can) so you can upload it, then youtube reencodes it. Honestly at the bitrates we're talking about, you could probably use almost anything for the intermediate step. But yes, you should also change it to 30fps during intermediate.
dstln is offline   Reply With Quote
Old 6th December 2009, 17:21   #24  |  Link
nm
Registered User
 
Join Date: Mar 2005
Location: Finland
Posts: 2,643
Quote:
Originally Posted by AiDz0r View Post
Here's another video from youtube which is the best, and he says he did from FFDSHOW video encoder? so thats better then x264?.
No, ffdshow uses libx264 for H.264 encoding and the version it uses is probably not the latest. Secondly, either the defaults are bad or you guys have changed the settings to make no sense. Your first screenshots and these later ones show the same mistakes in basic ratecontrol settings, B-Frames and the loop filter. At least this other guy has set a decent bitrate for 960x540. You were using the same for twice the frame size.

x264's defaults & a suitable CRF will produce an order of magnitude better results at the same bitrate.

You haven't shown us the output that you get from x264 or even told us what it looks like, so it's hard to say if there's something seriously wrong with it. However, as people have repeatedly pointed out, the quality problem is most likely caused by Youtube's automatic encoding. Your 3-second sample clip is quite a difficult piece because there is lots of fast motion where the poor 120 fps -> 30 fps motion blur effect may cause additional problems.

So, I'd suggest fixing the motion blur (one way is to capture at a higher framerate, such as 480 fps) or try disabling it completely (drop frames or capture at 30 fps). Also, try scaling the video down to 960x540, like the other guy is doing. Youtube might handle that better.

Last edited by nm; 6th December 2009 at 17:24.
nm is offline   Reply With Quote
Old 7th December 2009, 07:47   #25  |  Link
AiDz0r
⃪ ͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤ ͤͤ
 
AiDz0r's Avatar
 
Join Date: Nov 2009
Location: Australia
Posts: 54
Well then, oke here's a simple way to recognize if the quality is bad or not, fistly look at the Crosshair in the middle, and look at the writing (Kills) on the top right corner.

and as you said opening B-Frames and loop filter is allways a better option do you know what else should i use? also that image above the ffdshow one, is my friends thats how he does his settings and gets way better then mine


My test video based on X264
http://www.youtube.com/watch?v=JVLzMmLTdEs --> Jeeb showed me the preset for the X264.exe
http://www.youtube.com/watch?v=S_hMmvssX_E --> my test with different preset. from x264.exe and yes latest version

These other video which are really great, i can't imagine these videos without the re-compressed thing in youtube..
http://www.youtube.com/watch?v=0ZTFppqY1Do
http://www.youtube.com/watch?v=VeL9QAOyllI
http://www.youtube.com/watch?v=FwOeEPf-onA
AiDz0r is offline   Reply With Quote
Old 7th December 2009, 09:00   #26  |  Link
nm
Registered User
 
Join Date: Mar 2005
Location: Finland
Posts: 2,643
Quote:
Originally Posted by AiDz0r View Post
and as you said opening B-Frames and loop filter is allways a better option do you know what else should i use?
Rest of the settings don't matter that much as long as you're using a high enough bitrate (or low enough CRF) to keep the output nearly transparent. You don't need the highest compression factor for encoding YouTube-intermediates.

Quote:
My test video based on X264
http://www.youtube.com/watch?v=JVLzMmLTdEs --> Jeeb showed me the preset for the X264.exe
http://www.youtube.com/watch?v=S_hMmvssX_E --> my test with different preset. from x264.exe and yes latest version
In my opinion, both of these videos are about as good as they can be considering the original source and YouTube's current limitations. I don't see other quality difference than editing (different contrast and color levels, perhaps different motion blur) when compared against those three other videos. Upload a longer clip to get a better idea of the overall quality.

Last edited by nm; 7th December 2009 at 09:03.
nm is offline   Reply With Quote
Old 7th December 2009, 12:50   #27  |  Link
AiDz0r
⃪ ͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤͤ ͤͤ
 
AiDz0r's Avatar
 
Join Date: Nov 2009
Location: Australia
Posts: 54
oke then thanks for the tip ill try it out next time, a Long one with what you said exactly CRF =D thanks allot for all helping me out!!! really learned allot
AiDz0r is offline   Reply With Quote
Reply

Tags
codec, ffdshow, h264, x264

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 00:01.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2017, vBulletin Solutions Inc.