Yes. Deleting data does wonders for the filesize. The question I'm bringing up is one of quality.
If you must delete, delete starting from the 50GB+ original BluRays if at all possible, or some other very high quality source. That way the compression algorithm has the best chance of saving the important scene data.
And keep an eye on the known hard to encode scenes. A lot of the typical shots of a movie are handled well on one set of settings, but suddenly screw up on other scenes (or other animation styles. Anime vs Cartoons vs 3D vs Live Action can have subtle differences leading to quality issues).
It's not easy, and AV1 is our best bet at doing this well so far. But when the future algorithms come out, you need to start over from the best sources of you want AV2 to have a chance.
You should *Never* double compress. (Blu-ray -> H265 -> AV1). This is horrible for the quality. You'll get better results from BluRay -> AV1 by a large margin.
If you must delete, delete starting from the 50GB+ original BluRays if at all possible, or some other very high quality source. That way the compression algorithm has the best chance of saving the important scene data.
And keep an eye on the known hard to encode scenes. A lot of the typical shots of a movie are handled well on one set of settings, but suddenly screw up on other scenes (or other animation styles. Anime vs Cartoons vs 3D vs Live Action can have subtle differences leading to quality issues).
It's not easy, and AV1 is our best bet at doing this well so far. But when the future algorithms come out, you need to start over from the best sources of you want AV2 to have a chance.
You should *Never* double compress. (Blu-ray -> H265 -> AV1). This is horrible for the quality. You'll get better results from BluRay -> AV1 by a large margin.