|
|
| kensclark18 |
| Posted: Sep 22 2014, 07:32 PM |
 |
|
Newbie
Group: Members
Posts: 3
Member No.: 38283
Joined: 22-September 14
|
I recorded a video in lossless RGB mode on Fraps. The raw video looks amazing but when I encode it YouTube makes it blurry. I used ALL the settings recommended by Youtube. "--keyint 15 --bframes 2", the slow preset, the high profile, and converted it to the YV12 colorspace. It looks okay on my computer but since YouTube likes to compress their videos again, it looks pretty blurry at certain points. Should I change any settings? Here is the video: https://www.youtube.com/watch?v=3M7T2gukwws |
|
| kensclark18 |
| Posted: Sep 22 2014, 07:40 PM |
|
|
Newbie
Group: Members
Posts: 3
Member No.: 38283
Joined: 22-September 14
|
I forgot to say that I am using an average bitrate of 50mbps. |
|
| dloneranger |
| Posted: Sep 22 2014, 08:04 PM |
|
|
Moderator
Group: Moderators
Posts: 2366
Member No.: 22158
Joined: 26-September 07
|
Well, first off is that all the video codecs like x264/mpeg4 etc are designed to compress 'natural' images well and not the sharp edged flat areas of images - like jpg compression of things like text, it's always going to suffer from misuse of its intended purpose in these scenarios
That said... you could try switching over to using 'single pass ratefactor based (crf)' instead of a bitrate based setting
Then just pick a setting that gives a high enough quality
File sizes can be unpredictable in this mode though, as it's compressing to a 'quality' instead of a bitrate
Actually, unless you are trying to make a file of a specific size, then bitrate based encoding is nearly always the worst choice
@raffriff42 may leave some advice as I know he deals with FRAPS quite a bit
ps
In the latest x264vfw, I see there is also a lossless setting now as well (I haven't tested it though)
--------------------
MultiAdjust JoinWav WavNormalize FFMPeg Input Plugin v1827 UnSharpMask
Windows7/8 Codec Chooser
All FccHandlers Stuff inc. Installers for acm codecs AAC, AC3, LameMp3 |
|
| kensclark18 |
| Posted: Sep 22 2014, 08:23 PM |
|
|
Newbie
Group: Members
Posts: 3
Member No.: 38283
Joined: 22-September 14
|
Thanks. I did not know that the codec was made for more natural images. I will mess around with the settings and see if I can make it look better. |
|
| raffriff42 |
| Posted: Sep 23 2014, 02:51 AM |
|
|
Advanced Member
Group: Members
Posts: 384
Member No.: 35081
Joined: 25-June 12
|
It's not the compression that's the problem (assuming you are compressing at high quality as dloneranger suggests; I use CRF mode, ratefactor=18) but the conversion from RGB to YV12, which loses half your color resolution. Yes you could use x264's "high 4:4:4" profile, but YouTube will proceed to convert to it YV12 anyway, if it accepts the video at all.
The best way to deal with it, for standard definition video or lower, is to double the size before compressing, while still in RGB. Use the Resize filter; mode="nearest neighbor." For high definition sources, there's not a lot you can do without making the video unreasonably huge.
The biggest problem is usually small text on screen; try to make the text larger with the game's settings.
Oh, avoid lots of random activity on screen - snow, rain, sand, leaves - as these really don't compress well. Turn these effects down in the game settings.
Here are some interesting, related threads -
https://encodingtalk.com/threads/loss-of-vi...n-youtube.3160/
https://encodingtalk.com/threads/arma-3-fra...s-youtube.2968/ |
|
