Hello, good day.
We are CoUP, a film production firm based in Delhi, India.
Your project is well explained and its specificity helps us to narrow our bid down to 50 Euros.
Here is how we would go about completing the same:
1. Transfer of data - the video and audio files (both old and new). (DropBox, WeTransfer etc.)
2. Edit - Using Adobe Premiere and Audition. Audio clean-up and synchronizing.
3. First Draft - A completed low-res draft would be shared for your feedback.
4. Render - A final render to specifications you want after incorporating feedback/suggestions.
5. Release - Transfer of the final file. (DropBox, WeTransfer etc.)
Re-recorded audio, if not of the same person, would have certain nuances that might not match the video. Having said that, there are ways to slow down/speed up the video to ensure sync. Because this is a hit and miss kind of a thing, we would request you to share the video and audio file, let us review them and then award the project, if at all.
Please consider this as a serious, genuine bid. We are new to Freelancer, hence the low ratings, but our offline work speaks for itself. Do get in touch to discuss further.
Thank you for the opportunity,
Kashan Mustafa
(Director, CoUP)