I am working on a project with video clips taken by a Sony 4K camcorder (FRD-AX33/XAVC S). As I have issues in editing clips in timeline using the raw XAVC S clips, I have pre-processed my raw video clips into 4K mp4 format. With this extra step, I can go ahead and edit my recordings.
Everything seems went well and I produced my first few 4K videos using VSX8 and I shared them on YouTube (4K 30p mp4 as suggested by YouTube). My audience soon reported to me that I have audio delay problem!! I soon confirmed it and this issue showed up in more than one cases:
1. The original video from X8 looks OK. But the YouTube version (processed by YouTube) has severe audio delay.
2. Some of the output mp4 videos from X8 already have audio sync issue. They seems to occur to clips which is at the end of long recording or clips with more heavy editing like split/transitions/...
For the first one, since the original mp4 from X8 looked generally fine (it has some visible audio delay in one clip in the middle), I used Handbrake to transcode it and then upload the output mp4 to YouTube. This Handbrake version looks much better than the X8 encoded one. This indicated the X8 mp4 encoder has some hidden issues at least with YouTube.
The second case is more annoying and I finally confirmed it should be a X8 bug after many builds and experiments: In the original production timeline, I imported the X8 rendered mp4 into an overlay track and compared the audio waveforms. I can clearly see that the waveform does not align between those two!
It is not clear where the bug comes from and I think it only affects 4K mp4 because I did not have audio/video sync issue when I did 1080p HD project before. This is a big disappointment for X8 as I upgrade it for 4K video production. Now I have to switch or rely other video editors or encoders for proper.
At this moment, I would not recommend X8 for people when will be working on 4K project.
Statistics: Posted by hsinhow — Mon May 11, 2015 11:33 pm
Statistics: Posted by Ken Berry — Mon May 11, 2015 8:56 pm
Corel removed the Advanced options after X6, this disabled the means of accessing WMV profile editor, there is no way to create a new profile using Video Studio X8.
I don’t know why Corel disabled this option.
You can use Windows Media Profile Editor to create your own profile, that will save as a .prx file to here:-
C:\Program Files (x86)\Windows Media Components\Encoder\Profiles
Copy the new prx to :-
C:\Program Files\Corel\Corel VideoStudio Ultimate X8\Ulead.dat\WMV_Profiles
For 64 bit
C:\Program Files (x86)\Corel\Corel VideoStudio Ultimate X8\Ulead.dat
For 32 bit
The new profile will then be available from the Movie Profile Manager WMV – new – Profiles.
Video profile 720 x 576 will only produce 4:3 when using say Mpeg2.
720 x 576 is not actually 4:3, use a calculator, the pixels are not square, think of them as rectangular, Non Square Pixel Rendering
WMV uses square pixels 768 x 576 is 4:3 and should be used when working with WMV.
Sorry if that’s a little confusing?
The profile “Ulead Neptune Best Quality uses a 640 x 480 frame size, that’s 4:3.
There is also Ulead WMV 1366 x 1024 which is also 4:3
Smart Render ………… speeds up rendering times by effectively doing a quick job on the unedited sections and being more efficient on the edited portions takes longer.
Most of the time Smart Render works well, but if you think there are quality issues then try disabling to render again?
Statistics: Posted by lata — Mon May 11, 2015 8:25 pm
3 week waiting for this response ,
But now i'm happy to have join this community , your help is very appreciate
Thanks All , and share your idea or tricks : it help others like me
P.s. really don't know why the support didn't know that patch ??????
Statistics: Posted by LeGrand — Mon May 11, 2015 8:18 pm
Statistics: Posted by trailryder42 — Mon May 11, 2015 7:55 pm
And welcome to the forums
Are you saying that you have used the fix provided by Corel, Ken gave the url link above for Boris Graffiti
Can you say that the fix worked for you?
Statistics: Posted by lata — Mon May 11, 2015 6:08 pm