Suppose you took a screenshot of a scene in a 720x480 episode. That's the only available resolution for that episode. Years later, a BD of that series comes out, and you take a screenshot of the same scene on the new 1280x720 BD version of the episode. If you open up a photo editor (ACDSee Photo Manager 9 in my case) and resize that 720p screenshot to 720x480, the resized picture would have a better quality.
Does this apply in resizing mkv too? Or does the resolution just decide the dimensions for the picture to appear, while the quality really rests on the CRF or bitrate you choose to encode the mkv at?
I just started encoding a few weeks ago. I use a .bat file for encoding with --preset veryslow (placebo is just ridiculous) and my CRF varies from 22 to 18. I'm more likely to use 18 and 19 for resizing 1080p to 720p since so far, the 1080p BD sources I have are either upscales or just plain lousy. I use the 10-bit x264 thingy and placed it in my User profile in C:\.
These are my laptop specs: Windows 7 Home Premium, HP Pavilion dv6 Notebook PC, Intel Core i7-2670QM @ 2.20GHz, 8GB RAM, 1TB HDD
Now that I've established that, I could go on with my query.
Would resizing 1080p to 720p be better (in terms of quality) than getting an already 720p source? In another thread, I saw someone say "same bitrate = same filesize". Since I mentioned that resizing a 1280x720 picture to 720x480 would obviously show finer quality (given that it isn't an upscale, and since there are more details which you are basically compressing into a smaller size), I was wondering if that applied to encoding with the command line --vf resize:1280,720
Also another question about CRF and bitrate:
If my source originally has very high bitrate, say 23.0 Mbps, would re-encoding it to somewhere around CRF 22 give it quality as if re-encoding a 7000 kbps version of that episode to CRF 20 or CRF 19? And since it's a 1080p source, and I'm resizing it to 720p, even if I made it CRF 23, would it still have quality (better or a bit less) like the 7000 kbps to CRF 20?
Thanks
Does this apply in resizing mkv too? Or does the resolution just decide the dimensions for the picture to appear, while the quality really rests on the CRF or bitrate you choose to encode the mkv at?
I just started encoding a few weeks ago. I use a .bat file for encoding with --preset veryslow (placebo is just ridiculous) and my CRF varies from 22 to 18. I'm more likely to use 18 and 19 for resizing 1080p to 720p since so far, the 1080p BD sources I have are either upscales or just plain lousy. I use the 10-bit x264 thingy and placed it in my User profile in C:\.
These are my laptop specs: Windows 7 Home Premium, HP Pavilion dv6 Notebook PC, Intel Core i7-2670QM @ 2.20GHz, 8GB RAM, 1TB HDD
Now that I've established that, I could go on with my query.
Would resizing 1080p to 720p be better (in terms of quality) than getting an already 720p source? In another thread, I saw someone say "same bitrate = same filesize". Since I mentioned that resizing a 1280x720 picture to 720x480 would obviously show finer quality (given that it isn't an upscale, and since there are more details which you are basically compressing into a smaller size), I was wondering if that applied to encoding with the command line --vf resize:1280,720
Also another question about CRF and bitrate:
If my source originally has very high bitrate, say 23.0 Mbps, would re-encoding it to somewhere around CRF 22 give it quality as if re-encoding a 7000 kbps version of that episode to CRF 20 or CRF 19? And since it's a 1080p source, and I'm resizing it to 720p, even if I made it CRF 23, would it still have quality (better or a bit less) like the 7000 kbps to CRF 20?
Thanks