H.264 to H.265

[Jay123210599]

H.265 videos have higher quality than H.264 videos, right? So if I encode an original Blu-Ray H.264 video into a H.265 video, will the output video result in having higher quality than the original source?

[poisondeathray]

H.265 videos have higher quality than H.264 videos, right? So if I encode an original Blu-Ray H.264 video into a H.265 video, will the output video result in having higher quality than the original source?

No, and you're mixing up generations

h265 can have higher compression than h264, but it depends on the encoder, settings used

Quality always goes down when you re-encode with a lossy codec. Generation loss . You can never recover the lost data. You can never improve a video just by using lossy encoding - it ALWAYS gets worse .

Even if you used a lossless codec and increase the filesize 10x, that just prevents more quality loss. 10x larger but same quality

You can NEVER get better than the input source, just by using encoding . (Sometimes you can use filters and make some subjective improvements)



But if you started with the blu ray master (the source used to encode the retail blu ray - these are not publically available), then

a) used h265 with "x" bitrate

or

b) used h264 with "x" bitrate to make the original blu ray

Then (a) should be less bad than (b) the retail blu ray, but both are still worse than the Blu ray master (which is the input source in this case) . The retail blu-ray is a lossy encode from the blu-ray master. You cannot get the details back that the original master had from using the retail blu-ray as a source. It's forever gone

[usually_quiet]

H.265 videos have higher quality than H.264 videos, right? So if I encode an original Blu-Ray H.264 video into a H.265 video, will the output video result in having higher quality than the original source?

No. You can't increase the quality of a video just by re-encoding, regardless of the codec you use. The best you can do is keep the quality the same, and that is only possible using a true lossless codec.

H.265 encoding isn't used to increase quality. It is used because it can significantly decrease file size for HD and UHD video without making video quality much, much worse than the original.