Maybe that helps to understand:
I have done a short test to compare and understand the quality factor in h.264 export. I actually used 54 sec. of video footage in FHD h.264 as a basis with some audio and exported this in different quality settings starting from 10% up to 100%. I used the YT-preset with unchanged parameters beside the quality (in the advanced - codec settings).
Here are my results:
Quality___ encoding time____file size__ artefacts
10%______38 s______________9.3 k__very massive artefacts, blocking, color flic…
I normally use H.264 for my 4K drone footage and then encode using libx264 (or h264_qsv) but my drone also gives me the option of recording in H.265 as an alternative. As I understand it this can preserve more information in a smaller bandwidth. It seems it can take longer to render but you also end up with smaller file sizes.
YouTube appears to also support VP9 natively so encoding H.265 footage using the libvpx_vp9 codec is an option and does produce smaller files sizes, although it seems m…
As you probably may know there is a direct relation between video quality and file size / rendering time.
The quality setting is one factor to make the choice easy. The last topic is very helpful to understand the export options with relation to codec settings and quality issues versus en/decoding performance and file size etc.