I wanted to create an efficient rending of my project for use on YouTube. So I downloaded a couple of user created profiles to test them out.
Both of them carry the warning when I select them as follows:
This render preset uses a ‘profile’ parameter.
Unless you know what you are doing you will probably have to change it to ‘mlt_profile’.
First, I would check whether the render preset works or throws errors. If there are errors, I would check whether they have to do with the profile parameter and the naming convention. If it requires the parameter to be mlt_profile you can easily change that in the render preset XML file using any text editor of your choice.
Looks like a change in the parameter name to better reflect the underlying renderer.
Project->Render->find the preset->Edit preset->Other->Additional parameters, it’s a text box, edit with keyboard. Follow the suggestion to rename profile to mlt_profile, despite whatever preset used in that downloaded profile might exist, the available options can be seen under /usr/share/mlt-7/profiles/.
You might want to change defaultquality but I find that 23 gives about 15-16 Mbps, which is double of what Youtube recommends, so should be more than enough. Of course you may crank it to 0 to get basically lossless quality, only to find that Youtube will compress it like hell as if it’s 28 if not worse.