-
Splicing in new audio
Is there a way to splice a new audio track to a video clip without rendering?
I am working on a documentary and have several talking heads in 20 minute takes. My plan would be to syc up the video to the audio of each take in the usual way. Then I can and work on the takes (with their new audio) in the trimmer making various subtakes and organizing them into bins etc. That way I only have to syc audio to video once for each take – from the clapper board event. But it seems the only way to marry up audio with video is to render them together and then import them back into the project – which takes time. For instance I have tried grouping the video track with the new audio track and then making a subclip, but the subclip always contains the old reference audio track (even if it is deleted from the timeline) not the new one.
Or is my workflow screwed up?
Thanks for your help,
Terence
(Sony Vegas Pro 9) -
6 Replies
-
There is no way to do this in Vegas without rendering. You would need a tool that could remux the video with different audio but I don’t know of any tool that will let you do this (which doesn’t mean that one doesn’t exist).
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Thanks, John. You have saved me from wasting more time attempting the impossible.
I think I’ll stay with the tools I know and audio sync and render individual takes in Vegas as a first step.
My only concern is whether rendering the video twice will compromise final image quality in any way. I will use the same output settings in audio syncing that I plan to use in my final project render (H.264/30fps/720p/12Mbps).
-
My only concern is whether rendering the video twice will compromise final image quality in any way. I will use the same output settings in audio syncing that I plan to use in my final project render (H.264/30fps/720p/12Mbps).
Rendering twice to a lossy format like h.264 will certainly hurt quality. I would use a near lossless format like Cineform or Sony YUV. Also rendering to the final project format might also compromise quality. It is better to do all of your work in the higher source resolution (assuming your source is 1080 not 720).
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Thanks for the update, John.
Vegas appears not to include these codecs (YUV or Cinemax). I did a quick Google search – but not sure what is authentic or whether I have to buy one of these. I did read something about *.mfx being lossless. I know this is a container not a codec. Vegas 9.0 has this rendering option, but doesn’t say what the codec behind it is. I saw that the mfx HQ bitrate is 35 Mbs, which suggests that compression is minimal. I’m probably talking out of my hat as my knowledge is very limited! Anyway, would this be a viable option? Otherwise, where can I obtain the correct versions of YUV or Cinemax Codecs as you suggested?
Again, many thanks for all your input!
Terence -
The Sony YUV codec is included with Vegas Pro. It uses an AVI container so you should look under Video for Windows for the HD 1080-60i YUV template. The files will be huge because they are lossless but they will be very high quality.
Cineform is no longer shipped as part of Vegas Pro as of version 9.0 but if you have an earlier version you will have it. IMHO, it is well worth the investment to purchase if you are doing a lot of HD intermediate rendering like you are planning to do. You can get Cineform Neo Scene for only $99 USD. It also uses an AVI container.
Using Sony MXF is certainly an option too. It uses the MPEG2 codec at 50Mbps which should provide excellent quality.
Any of those will be better than rendering to h.264 as an intermediary.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Got it! Thanks, John – great that you could take time providing all this information. You’re the man!!
-T
Reply to this Discussion! Login or Sign Up