how to get Vegas to NOT reencode split Mpeg2 ?

illusory wrote on 4/24/2011, 6:34 PM
I'm trying out Sony Vegas. I'm trying to edit an mpeg 2, to cut off the beginning and end to just take a piece of it out. Fine, Now I want to export the resulting clip as the mpeg it is, WITHOUT REENCODING IT! Will nothing do this? Vegas seems to be re-rendering it, despite its claims to avoid reencoding when uneccesary. Are there settings to prevent this?

I tried it on Womble, and that seemed export without reencoding (at least with one method), but it destroyed the audio portion of the file -- turned it to loud hissss!

And Vegas will not accept VOBs, so that means i need to reencode an mpeg2 from a VOB, then bring it into Vegas which will again reencode the mpeg2 after i edit it down to the portion i want. Then drag it into the DVD artchitecht to render the video. This means I have reencoded at least two times, when the file is DVD COMPLIANT to begin with!

Is there any way around this? Anything I can do to simply get pieces cut from Vob files into DVD architect and make a DVD which does not insist upon reencoding?

Please help!
And thank you for listening,
NJ

Comments

MSmart wrote on 4/24/2011, 6:54 PM
Will nothing do this?

Not Vegas Movie Studio, but VideoReDo will. I have both and each product has its strength.
richard-amirault wrote on 4/25/2011, 7:51 AM
I'm trying to edit an mpeg 2, to cut off the beginning and end to just take a piece of it out. Fine, Now I want to export the resulting clip as the mpeg it is, WITHOUT REENCODING IT! Will nothing do this? Vegas seems to be re-rendering it, despite its claims to avoid reencoding when uneccesary. Are there settings to prevent this?

When you render are you choosing a mpeg2 output that has an equals sign (=) next to it?
MSmart wrote on 4/25/2011, 8:56 PM
Don't make me eat crow, but you're correct, make sure to render with the same settings as the source media. The smart render feature of VMS should kick in and only reencode the cut points.
illusory wrote on 4/26/2011, 11:33 PM
are you saying the = sign means it will not re-encode? I find that will only save out the video. If i tell it to save out the audio with the mpeg, it ends up not compliant with DVDA. Don't understand why that should happen... if i choose a compliant audio format such as ac3. Which means every video needs to have the audio saved separately, which becomes a pain when you are doing a lot of short video clips...
musicvid10 wrote on 4/27/2011, 9:01 AM
I think this has been explained to you before.
If you give DVD Architect video with embedded audio, it will re-encode the audio, even if both streams are compliant.

MPEG-2 will smart render (at least in Vegas Pro) if the output is identical to the source. The way you can tell if it is smart rendering is when the preview screen says "Recompression not required."

If you are just interested in splitting, trimming, and joining MPEG-2 video without recompression, VideoRedo Plus is designed for just this purpose. Will also demux to native elementary streams if you wish. Download the trial version and see if that helps.
sodbuster-ca wrote on 4/27/2011, 4:05 PM
"If you are just interested in splitting, trimming, and joining MPEG-2 video without recompression, VideoRedo Plus is designed for just this purpose. Will also demux to native elementary streams if you wish.

That's true.

For editing my PVR mpeg2's I use something called MPEG-VCR from Womble. http://www.womble.com It also has MUX-DEMUX capabilities as well. It's very quick & easy to use and only cost $19 US (software download). I mainly use it to zap commercials from the shows I PVR.

Occasionally the video of a TV show will be slightly out of sync with the dialog so I use MPEG-VCR to re-align things. Its a pretty handy little tool.

Not to derail the thread but I wanted to mention that I got a kick out the background music on that demo/test you put up on Vimeo (the peacock video). Isn't that one of Bach's Brandenburg Concertos?
ritsmer wrote on 4/29/2011, 2:14 PM
Isn't that one of Bach's Brandenburg Concertos?

No. 3 BWV 1048
RAB78 wrote on 4/29/2011, 3:18 PM
I use VideoReDo too. It's a killer program. Well worth the money. It's great for trimming MPEG2's without recompression. Very easy to use and can cut with frame accuracy.