Zoom in x200
Left: 720p x264 --> 0.25 GB
Right: 1080p x265 --> 1.11 GB
I tested watching both on my phone:
- Without zoom, I didn’t notice much difference in visuals.
- The audio is stronger at the same level on the x265 version.
- I need +15 volume level (Android) to make the x264 sound equal.
What do you think, guys? Is it worth 4 times the file size?
It really depends on how it was originally encded to x264 and what your goals for transcoding are in the first place (save space, playback compatibility, etc etc). there's a pretty good little post on stackexchange that goes into more detail about the ffmpeg flags.
https://unix.stackexchange.com/a/248711