Hi, As Ann Bens mentioned it, Proxy in Premiere Pro workflow need to match the audio channels of the original file. It can be annoying if for example, you upload light proxy files on a server because you are in a foreign state or country to start your editing as fast as possible while the original big files are uploaded later and will be reconnected to each proxy. For that Sony has the Ci infrastructure with a workspace panel integrated in Premiere. I don't know exactly how it handle proxies workflow within Premiere so I can't talk about it. This being said, if you are not in that kind of situation, a mp4 proxy is not ideal for editing since it's an interframe codec and will push your CPU way harder than an XAVC intra, DNx or ProRes. Mp4 proxy creation on cameras is great for streaming purpose since it will be published on a server way faster than full res files. Not so great for pure editing purpose. I have watched few proxy workflows videos on Avid but was not able to find a video on relinking with already created mp4 proxy files. So if you are not sending files over a ftp to edit as fast as possible, just don't use the In camera proxy function. Use the very simple and efficient workflow of PPRO. Create proxy while importing your files in Premiere or create them from the project panel. It's a background process to you can start editing right away. In your timeline, you can switch between the full res and the proxy. When you ready to render, you don't need to conform anything since Premiere will always use the full res file for rendering ( there is a new option that can allow you to use the proxy for render, if needed ).
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