X5 introduces stuttering into rendered footage.

[alexcee]

Hi Everyone.

I have Canon 60d original footage shot at 1080p 25. The clip is only 9-1/2 sec long. When I play the clip straight out of my pc folder inside VLC the clip is smooth. The moment I import the clip into VS proX5 timeline and straight away, share / create video file / AVCHD / 1920x1080p preset, VS introduces 4 dreaded stutter problems into the render finished product which is very noticeable and ugly to watch.. I am in PAL land and VS was installed to PAL. I have also tried the WMV hd1080p preset and mpeg-4 and the results where just as disappointing.

Any suggestions as we have tried this same simple test on my friends mac using imovie and the exported results were perfect.

[canuck]

Could you possibly upload the clips to a website for sharing such a 4Shared or mediafire. We could then take a look at it and test it.

[alexcee]

Hi Everyone.

Ok, I have uploaded the unadulterated scene/footage to 4shared for those interested in trying this experiment. Here is the link

http://www.4shared.com/folder/VHN6ms7x/_online.html

I have also tried VS pro x6 trial and the same problem is occurring once rendered.

[Jan-61]

I just browsed this forum and found this post:

I do have the same problem with VSX4 and m2ts-footage from my Sony CX 130E, wanting to optimize the sound of a clip, the rendered one is indeed unpleasant to look at, compared to Original. Also tried various different formats > all the same.


Hopefully this could be solved!


Jan.

[alexcee]

Anyone with any ideas about this problem..

[lata]

Hi Alexcee

What are you trying to create , a bluray video, standard DVD or a video for the internet.

[alexcee]

Hi Trevor.
I am basically trying to highlight the problem of what I put in, I don't get out. Here is my workflow.

1. I import the video file.
2.I bring this 1 file into the timeline (without any editing, untouched), I
3. Through the Share, Create Video File, Custom
4. Give my file a name eg: Myshot
5. Change "Save as type" to Quicktime Movie Files (*.MOV: *.QT)
6 Select "Options" , Unclick perform smart render as precaution
7. I leave the "Frame rate" at 25fps
8. In the "General" tab, I change to "Frame-type" to frame-based, as the footage is progressive
9. "Frame size" i select User-defined and change that to the footage size to 1920*1080 which is the same size as the original.
10. Compression tab, i select mpeg 4 Visual, Quality 100% as we still dont have h264
11. ok and save. VS renders the footage and whalla.

The footage is pixelated and juddery, in otherwords terrible. I have tried the presets such as bluray, avchd, mpeg4 etc, the quality is better as there is no pixelation, however, the judder is very much there.
I have not tried dvd as this defeats the purpose of having a HD camera.

As an additional test I have used "compression" as "None" in step 10, then played it back with Quicktime the judder is there. (I have fast HDD setup to play raw files that can read at over 300MBytes/s i use with premiere pro cs5.5) so reading this 1.2GB file for 9sec is no problem.

As I note I have completed this test on Premiere pro cs5.5 with out a hitch. The output is perrfect. So its definately not the codecs I have installed on the pc. I have the latest Quicktime pro full version installed also.
I have tried all possibilities with this software and can not get anything decent out of it. Please let me know if I can try something else for HD output.

[Jan-61]

3. Through the Share, Create Video File, Custom

What happens when you select one of the four presets here, and render then (so not saving it as QT-vid)?

Oops, you did this already (your starting post)

Is it about the way motion is displayed or about image quality?


Jan.

[Jan-61]

Is it about the way motion is displayed or about image quality?

I watched your video, image quality looks good, but the motion is rather staccato.

Have similar problem:

I just browsed this forum and found this post:
I do have the same problem with VSX4 and m2ts-footage from my Sony CX 130E, wanting to optimize the sound of a clip, the rendered one is indeed unpleasant to look at, compared to Original. Also tried various different formats > all the same.

See: http://forum.corel.com/EN/viewtopic.php?f=1&t=50761



Jan.

[lata]

Hi Alex

Apologies for the delay in replying I have not been away for a few days.

I downloaded your sample and inserted to Video Studio timeline.
Playback in clip mode shows a judder, but that will depend on the PC being used.
Video Studio created a Smart Proxy files which certainly improved playback, in Project Playback mode.

I then viewed each frame in turn looking for duplicate frames.
By selecting the digital clock frame 00:00:00:23 I can then use the keyboard arrow keys, Up and Down to navigate through each frame.
I can clearly see the train advancing from right to left.
If there is a pause then there is a duplicate frame.

These are the frames I identified

01-03, 02-07, 04-12, 08-00, 08-02, 08-04, 08-07, 09-00, 09-02.09-04, 09-06.

I am unsure if these frames are part of the video clip, but to be honest I think it is the way Video Studio is reading the clip/frames? We have already established that VS does not recognise the correct video properties.
I don’t know why Video Studio is having problems with these types of video files but clearly there are problems.

I used a video file Converter to render the video to mpeg a more editable format using these settings, video studio seems to cope with this format.
I have uploaded the sample to 4shared.

http://www.4shared.com/video/ICkOIcoY/f ... 630_2.html

PAL (25 fps)
MPEG Transport-Stream Files
24 bits, 1920 x 1080, 25 fps
Frame-based
(HDMV-PAL), 16:9
Video data rate: 16800 kbps
Audio data rate: 224 kbps
MPEG audio layer 2, 48 KHz, Stereo

I will do a few more tests using Video Studio but feel I will not be able to improve things without using a third party program to convert the video?

[alexcee]

Hi Jan. Its both, the motion becomes juddery and quality rendered using the mpeg 4 visual compression is way to compressed even if the quality is set for 100% and therefore very pixelated. I think the best way to approach this would be to transcode the initial footage using mpeg streamclip to mpeg or something simple and import that into VS and see what happens. Testing continues.