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Hello,
Input : MPEG-4 file, 1920x1080, 8000kbps, 30fps. The file is about 1gb and the quality is absolutly *perfect*.
I use PowerDirector to work on this movie... add sounds, an overlay, nothing major really but it needs to recompress everything.
Output : MPEG-4 format, 1920x1080, 8000kbps, 29.97fps, progressive, high profile, CABAC, high quality with deblocking.
The produced file is awfully poor quality : When there are fast movements, *massive* blocks appear on the screen. And I often see a blur during slow movements. On top of that, the produced file is two times bigger than my original (about 2gb instead of 1)
I tried switching off the fast rendering, but no luck. I am starting to think that PowerDirector just doesn't know how to compress in MPEG-4 correctly. Is there anything I can do to fix this problem ? Can the 30fps to 29.97 convertion cause such massive quality loss ?
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1. Which operating system do you use, W8, W7, Vista, XP?
W7 SP1 64x
2. Which version of PDR, See Part A below
12.0.2726.0 Ultra version
3. Which SR number (available in the "About" box of PDR and is NOT the CD-Key!)
VDE140327-02
6. What anti-virus solution is installed on your PC?
Microsoft Security Essentials
7. What codec packs installed if any?
None. I use VLC.
8. What other video editing programs are installed - just in case there is a software conflict?
None
9. What burning software is installed on your PC?
ImgBurn, but I don't use it for videos
Hi GuillaumeF.,
Thank you for all the information you provided.
Your system is running 3xNvidia680 GPU's, right - wow.
Where are the source files located on your drives (which drives)? I like to have a lot more space on C drive for PDR when I render video.The blockiness has been associated with hardware acceleration .
Things to try:
1. Go to Preferences/Hardware/Enable hardware decoding and uncheck and do the same for OpenGL. See what effect that has on the rendering. Reverse, by checking each.
2. Make sure you have Shadow Edit files unchecked. Preferences/General/Enable HD video processing/Uncheck.
3. Reduce the project size - simply make two project files and cut each in half/quarter etc to see if by reducing the processing, the output is better.
Things to add:
a) Please can we have a 5 second sample file, this file must not be edited or processed, a capture for camera file (or directly from source).
b) If you cant do the above then please provide the media info on the video file. See Part J in the guide,
http://forum.cyberlink.com/forum/posts/list/29701.page
Media Info is important as it'll help to create a similar mp4 template to what the original mp4 was.
There has always been a case for editing in smaller chunks and never as a "whole". When computers were less powerful and now when they have more kick. The home computer just doesn't have the number crunching capability of a multi core CPU unit and will get stressed. If you are carrying out so many changes on a large project, the same approach as used to be applied to old computers - segment your work where effects and changes are applied, render them and then bring the rendered project back together. the hope is that SVRT will render the finished smaller projects and make one completed video for you.
I edit mp4 files.
Dafydd
This message was edited 2 times. Last update was at Apr 25. 2014 04:32