compression questions

Shastasage wrote on 7/9/2009, 1:43 PM
I just got the Sony Z5u camera and use the .m2t compact flash
I like the speed of download..i do recommend the sand disk fire wire for upload..it is faster than port on my computer about 10 times.

ok so i am working with .m2t files and i am not so sure i have some setting proper because after i edit a bit and then go to render as...it seems to be compressing the files.

I am wanting to same the files in a .m2t format just like what i am editing......at certain points i get quick flashes of "no compression required" but mostly not 99%.

When i render to the same format shouldnt most of it be "no compression required"? i seem to remember this when i first got Vegas 8.0

Thanks for any help or direction

Shasta

Comments

musicvid10 wrote on 7/9/2009, 2:20 PM
Your render settings have to be exactly the same as your source for smart rendering to work.

Since you're getting "some" frames not recompressed, your seem to be close. So, the critical settings you need to look at are field order, frame rate, and maximum and average bitrate. Once you get these, you should be good to go, except you know it will render where you have applied transitions, effects, pan/crop, etc.

MediaInfo will give you far more information about your media files than the properties in Vegas.
John_Cline wrote on 7/9/2009, 4:39 PM
Smart rendering only comes into play when you have made absolutely NO CHANGES to the video and you are rendering a file which has exactly the same properties as the source file. If you have added a filter or a title or changed the video in any way, it will not smart render that section of the video. For example, if you have color corrected the entire file, then none of it will smart render.
Shastasage wrote on 7/9/2009, 7:13 PM
thanks Guys!

So basically if i have a 40 minute edited video...it will still take me 40 minutes to render?

My machine seems to render a minute for a minute unless i get crazy with transitions or compressing for the web

Shasta
John_Cline wrote on 7/9/2009, 7:32 PM
"So basically if i have a 40 minute edited video...it will still take me 40 minutes to render?"

There is no strict "one to one" ratio on program length versus render time, it might take much shorter or much longer depending on what effects have been applied or really any of a BUNCH of other factors.
Laurence wrote on 7/9/2009, 10:22 PM
Keep in mind that when you are smartrendering m2t video, the video rerendering may be lossless, but the audio is being decompressed and recompressed each time.

Also, you will notice that Vegas will get quite sluggish when you start putting a lot of m2t clips on a timeline all at once, and if you have the equivalent of two or three tapes on a timeline all at once, you can get crashes.