You can render to the same settings as the original video, but first you need to know what those are. The best way is to use a program called Mediainfo. this will give you the compression and bitrate of the original video which you then create a template in Vegas with matching numbers.


BUT, it may not be the same Quality. Each time you render compressed video formats, there will be some loss in quality. The only way to avoid this is to use uncompressed which creates very large files. Larger than most people want to store.

Some formats can be rendered using Smart Render, which only re-renders the video that has changed, but just copies the data of parts that have not been altered. There are only a few formats that Vegas supports smartrender.

Filesize is determined exclusively by the bitrate. Vegas bitrate is in bits per second instead of kilobits per second, therefore 7192 Kbps = 7,364,608 bits per second.

Use the Main Concept AVC encoder, choose the "Sony Tablet 1080p" preset, select "Customize Template", use Variable Bit Rate, set the maximum to 10,000,000 and the average to 7,364,608 and check the "Two-pass" box. Render away. It won't be exactly the same size as the original file, but it will be very close.

As DaveT2 pointed out, you will be re-encoding the original MP4 file and you will lose some video image quality. This is unavoidable when using only Vegas. Assuming that you have not modified the video or changed its length, there are ways to de-mux the file into separate audio and video streams using a piece of freeware called "tsMuxer", then create a new audio stream and then re-mux the file into a new MP4 using the original video stream and the new audio stream.

You can probably create a new AAC audio stream using Vegas by rendering using the Main Concept method above, but when you go to customize the render setting, deselect "Use Video" and it will just render the AAC audio stream. I don't really have the time at the moment to walk you through it step by step. It should be easy enough to figure out with the information I gave you.

Thanks all,

I did it about the same way John Cline mentioned, that worked.

But I still wonder whats the use of being able to save a template preset in the settings for the project (after I matched the original media settings) if i can't use this template to render the project in???

Marcel

Why can't you use the template to render?

If he's just making changes to the audio isn't there a way to just attach the audio to the existing video file w/ out rendering? Kind of like how DVD Architect does it?

Yes, see John Cline's post above.

@The Dude, the project template doesn't have options for bitrate (along with many user options you only get in the rendering templates). You CAN and should generally work in a project that matches your source footage settings, but Vegas only gives a small selection of formats that can be smart rendered. Double-compressing or remuxing are your only choices for most compressed sources.

Thank you all very much!

Why can't they just agree on 1 standard for all video and audio footage for christ sake, that would make life a lot easier... :)