Editing Mpeg-2

spurfilm schrieb am 26.02.2008 um 13:43 Uhr
Hello, I am just about to start using Vegas8 to edit large amounts of Mpeg-2 video for authoring in DVD Architect. First, if I add Mpeg-2 to the Vegas timeline, does it stay in that format until I export to DVDA? Also, what is the best container format of Mpeg-2 to import into Vegas for export? Basically, what is the best format to avoid recompression along the workflow? From original Mpeg-2 to Vegas to DVDA. Can any help please? Many thanks, Rick.

Kommentare

busterkeaton schrieb am 26.02.2008 um 15:07 Uhr
If you intend on authoring DVDs, there are templates in Vegas for DVD Architect.

You need to render your audio separately from your video. For video choose Main Concept encoder and use the DVDA template. For Audio, choose AC-3 and choose the DVDA template.

Vegas will keep your mpeg-2 as mpeg-2 on the Vegas timeline. You don't need a container format, you should be able to edit mpeg-2 straight on the timeline. What is the original source of your footage?

If you do things like corlor correction, composites, FX, then the mpeg2 will need to recompress during render. However, when using the DVDA templates, you will not have a second stage of recompressions.

Vegas pro 8 has smart rendering where it does not re-render mpeg-2 when it doesn't need to. So if you are just doing straight cuts and opening titles, only the title section would re-render. I don't know how well this has been implemented.
owlsroost schrieb am 26.02.2008 um 17:50 Uhr
See this thread [url=http://www.sonycreativesoftware.com/forums/ShowMessage.asp?ForumID=4&MessageID=576942] for a discussion of MPEG-2 smart rendering setup etc. Note the requirement to match the MPEG render template to the source video to enable smart-rendering.

Vegas will handle MPEG-2 program & transport stream files, and VOB files on the timeline. It won't accept elementary streams.

If you need to avoid re-compression of the video, then make sure that the source MPEG is DVD-compliant i.e. frame size/frame rate/max bitrate (easiest way to check is probably to drop a source file into a DVD Architect project and see if it wants to re-compress it). Vegas will always re-compress the audio.

Tony