Hello everyone,
I am looking to record my first course and I would like to be sure I do it properly to avoid weeks of work and conclude at the end I did do it properly.
I am recording 1920x1080. According to https://support.udemy.com/hc/en-us/articles/229232767-Video-Standards-and-Choosing-a-Camera, for H.264, the bitrate recommendations are 1920x1080 @ 10 Mb/s.
I use OBS to record my screen and I can set the bitrate to 10 Mb/s or higher. I set it to 15 Mb/s just to leave buffer.
But after I edit and then export using DaVinci Resolve, the video has only 2-3 MB/s for bitrate. I used both Automatic -> Best and Restrict to (values like 60000 or 80000 Kb/s, FPS is 30). However, the quality seems good to me.
If I use OpenShot and specify 15 Mb/s, it will provide me ~5MB/s for the exported video.
If I use CapCut for Windows, I can select an export bitrate like 15 Mb/s and the exported video will have, as desired, the chosen bitrate, in this example, 15 Mb/s.
But I would prefer to use DaVinci Resolve.
I also understand that Udemy will re-encode the video for faster playback as per https://community.udemy.com/t5/First-time-course-creation/Is-there-a-limit-for-frames-per-second-and-video-bitrate/m-p/16770#M1266.
I am looking to understand from your experience with these tools and with respect to Udemy's recommendation (1920x1080 @ 10 Mb/s) the following:
1 - does anyone understand why some tools like Davinci Resolve or OpenShot provide me a much lower bitrate than the original file?
2 - did anyone else experience the same (lower bitrate after editing the video than the original file)? If yes, did you have issues when publishing your videos to Udemy?
3 - I sent a test video for feedback from Udemy and regarding video part, I got a warning that I have some black bars, but no complains about bitrate. I uploaded my second video for test and waiting for feedback. If the feedback is good, should I be worried about any technical setting of my video, like much lower bitrate than what Udemy recommends?
4 - another recommendation that Udemy has is "Audio Codec: AAC (256 kb/s or better) or PCM". I can only get AAC with 192 kb/s. For the first test video the feedback for audio part was that it is great and clear. I was advised to use the same settings. Should I be worried about the fact that I can only get AAC with 192 kb/s even if the feedback for my test video was good?
Thank you very much for your help!