Why does video shutter/shake when I adjust gama,sat,or filte

bowhunter · Post by **bowhunter** » Fri Apr 27, 2007 11:02 pm

I am using videostudio 10.5+ on custom PC.
PC: amd dual core 3800+
Vista Ultimate 64
Raid 0 with 2 sata 125 drives
256mb agp video card

Camcorder is a Sony HC3 HD. Everything is fine UNTIL I try to adjust gamma, saturation, hue, etc...or add a filter such as antishake. After I do so, then play the video, it shutters, shakes, etc.

Anyone know why or what I am doing wrong.

Thanks

Bow

Black Lab · Post by **Black Lab** » Fri Apr 27, 2007 11:10 pm

When I have multiple overlay tracks going, my pc has trouble keeping up. Maybe that is what you are experiencing when you add filters.

Try setting your playback to High Quality (File>Preferences). If you still experience problems then it is something else. If it plays fine then you'll have your answer.

Post by **Ken Berry** » Fri Apr 27, 2007 11:12 pm

And be aware that the anti-shake filter in VS is problematic at best. My own early experimentation with it indicated that it introduced far more shake than it eliminated. If you want to use an anti-shake filter, there are special third part programs for this which apparently do a good job, going from comments about them on this Board.

bowhunter · Post by **bowhunter** » Fri Apr 27, 2007 11:29 pm

Just tried the "high quality playback" and it did improve the video, BUT the video is now, rather then shuttering, just blurred. I think I have a powerful enough pc running vista to be able to add these effects and then view or preview them without shutter or blur. Right now all I am adjusting is the saturation, nothing else.

bowhunter · Post by **bowhunter** » Fri Apr 27, 2007 11:34 pm

ps...

My vista performance index score is 4.9 with my memory (2gb ddr) pulling me down. So I really don't think it is the pc.

etech6355 · Post by **etech6355** » Sat Apr 28, 2007 3:17 am

Are you saying the video does this in the preview mode playing from the timeline? This is only a preview, may not be the best method to view the video. What are your "Project Settings" and what are the source mpeg2 settings? They should both match exactly because you are editng an mpeg file.

If from a HC3 the source video should be CBR 25000kbs UFF, Audio=Mpeg 384kbs, 16:9
What are your project settings set to in VS, should be exactly the same.
Maybe try to render a small test file of whatever section is giving you trouble, mark that small section and render to a new hd-mpeg2 test file. View that on your HDTV to see how it looks.

bowhunter · Post by **bowhunter** » Sat Apr 28, 2007 3:34 pm

Will give that a try and see what happens

etech6355 · Post by **etech6355** » Sat Apr 28, 2007 4:02 pm

When editing mpeg files in VS it's important to match the "Project Settings" the same as the source videos settings, especially the fielding which is UFF (Upper_Field_First) for good motion.
If you make the project setttings match the source video then when creating a video file the process goes faster & reliable by using this procedure:
Standard Procedure to create a new video file after making the above settings would be Share -> Create Video File -> Same as project settings.
Reason being any editing you performed will be cached as the project settings were set to. When creating a new video file only the edited sections of the video will be re-encoded and the non-edited portions of the video will be passed over for re-encoding (smart rendered). This will make producing a new HD-Mpeg2 file very fast. This is as long as the "Project Settings" Match the source video(s).

I've also noticed that previewing or playing back hd-mpeg2 on the computer may not be an accurate playback of the actual footage due to some computers hardware limitations and the playback software being used.
I use external highdef hardware consumer devices to playback the hd-mpeg2 videos on the HDTV. This displays the video correctly. Many times a video recording of fast motion such as cars on a street passing by your cam or a panning of vertical bridging on a deck playback jumpy or not smooth on the computer when actually the playback is very smooth when played back on a certified hd-player on the HDTV. Many times users of the hd cams see poor playback on the computer and think somethings wrong with the video. They de-interlace the video and try tricks to get the video to playback correctly on the computer when actually there's nothing wrong with the video. It's the computer not playing back the videos fielding information correctly (which in hd-mpeg2 is intense high resolution fields).
Even having a HD-Certified Video Card and HD-Certified playback software (which is required equipment for hd-video) may not playback correctly on the computer screen if you don't use the correct settings on the video cards setup & in the playback software.

For example when using VLC Media Player to playback any hd-mpeg2 video I have to start VLC with these settings to achieve smooth playback of all the fielded information on the computer screen, otherwise the playback is jerky & not smooth. VLC player only uses DirectX acceleration.
"vlc --zoom=.5 --vout-filter=deinterlace --deinterlace-mode=linear"
The --zoom=.5 switch only resizes the video so it's manageable on the computer screen. the --vout-filter=deinterlace --deinterlace-mode=linear performs the actual de-interlace/linear blending of the fields for the computers frame_based screen.

Hope this helps. I also have a HC3 cam. Nicest cam I've ever owned so far.

bowhunter · Post by **bowhunter** » Tue May 01, 2007 7:40 pm

Thanks again for all the info. I did notice that once a dvd is completed, the problem goes away...so I'm set.

Regarding the Sony HC3.....Yes, great camcorder. I jumped on one after reading the reviews of the HC7. I wanted good low light, and the hc3 beats all the new ones. The HC7 has higher res (#of dots) but this causes a poor low light video comparied to the hc3. Since I waited until everyone was dumping their hc3's, I got one hell of a deal.

B