|
Best Porn Sites | Live Sex | Register | FAQ | Search | Today's Posts | Mark Forums Read |
Computer and Tech Help Discuss hardware, software, applications, malware removal, etc. |
|
Thread Tools |
19th January 2020, 03:45 | #1 |
Novice
Join Date: Oct 2019
Posts: 57
Thanks: 66
Thanked 223 Times in 47 Posts
|
Low bit rate HD videos
As you may know, low bit rate creates artifacts, particularly blockiness when there's motion. Here's an illustrative list of low bit rates of H.264 files I have:
Using AviSynth+ and x264 with MeGUI, I've worked on several of these files and have achieved some good results, although I have to try and test other filters. Below I provide a gallery of a frame-by-frame comparison of one project (the images are named original and processed). The overall configuration should be feasible to run on my machine, that is, I don't use top-notch yet excruciating slow filters – those who would compute at 0.10-0.20 frames per second (FPS) – for a marginal quality improvement. For example, that project had 71,708 frames (39:52.624), computing it at 0.10 FPS would require 717,080 seconds or 8 days, 7 hours, 11 minutes and 20 seconds . Code:
http://imgbox.com/g/cINf24NzVz |
|
19th January 2020, 04:05 | #2 | |
Mad Dog
Postaholic Join Date: Jul 2018
Location: Lost Paradise
Posts: 8,360
Thanks: 37,368
Thanked 69,236 Times in 8,673 Posts
|
Quote:
It's just a waste of time, IMHO. Same goes for audio conversions. You can't expect an MP3 converted to FLAC to sound just as good as a properly-ripped CD, or any other Uncompressed High-Resolution audio files. It's just the way it is. All the details get lost each time you export a video/audio file to a lossy/super-compressed format. So, by converting a poorly encoded video to another format, and just bump up the bitrate in the settings, you gain absolutely nothing. Also, for rendering/converting any video, you really need a fast CPU, these days. Not to mention a videocard capable of off-loading the CPU workload and reduce conversion time with their own technologies, like NVIDIA CUDA/CUVID or Intel's QuickSync. Otherwise it will take ages to encode/convert a video using just your PC's CPU. Hope that helps.
__________________
Live and let live. Live and learn. Liberate your mind. Embrace knowledge.
|
|
The Following 10 Users Say Thank You to SynchroDub For This Useful Post: |
19th January 2020, 07:05 | #3 |
Novice
Join Date: Oct 2019
Posts: 57
Thanks: 66
Thanked 223 Times in 47 Posts
|
Thank you for your answer, SynchroDub.
I work with what I have. Rather than considering using a cloud computing solution to outsource the encoding process, I'd prefer to save up and built a new PC. I agree, but what do you do when the only available option is poorly transferred or (overly) compressed content? Here they're talking about upscaling 2x or 4x times already compressed SD files. In my opinion, I believe that a good filtering and encoding process can effectively improve the overall quality. |
19th January 2020, 21:27 | #4 | ||
Registered User
Clinically Insane Join Date: Apr 2015
Location: Here
Posts: 2,330
Thanks: 1,012
Thanked 7,253 Times in 1,868 Posts
|
Quote:
Looking at the screen caps you provided, it's obvious that there is no overall quality improvement. But it seems possible that reencoding slightly changed the brightness/contrast/saturation of the images, and this is why you perceive a "marginal quality improvement". But the same effect can be achieved by changing your monitor, TV or media player settings, without wasting time and CPU power. Quote:
|
||
The Following 3 Users Say Thank You to zenthark For This Useful Post: |
19th January 2020, 23:02 | #5 |
Mad Dog
Postaholic Join Date: Jul 2018
Location: Lost Paradise
Posts: 8,360
Thanks: 37,368
Thanked 69,236 Times in 8,673 Posts
|
Yeah, I say: live with it.
Same goes for upscaling SD content to HD or 4K. It's a total waste of CPU power. The detail is simply not there, and the difference in quality will definitely be barely noticeable, even if you use the most expensive plugin you can get. If you start with a High Quality SD/HD material, it's a total different story. Say: you have, for example, an untouched BDRip that's over 20-30 GB in size. Making your own Blu-Ray or DVD from that source will definitely yield good results, compared to an already compressed video, that's just 4-5 GB in size. But, creating a DVD or Blu-Ray from a VHSRip, for example, or a badly compressed video, will only get you crap. So, my opinion is that if you have an already compressed video that look like crap, either try to get the best version of the same video, if you can, or just stick with it.
__________________
Live and let live. Live and learn. Liberate your mind. Embrace knowledge.
|
20th January 2020, 12:54 | #6 |
Registered User
Forum Lord Join Date: Nov 2009
Posts: 1,167
Thanks: 508
Thanked 1,697 Times in 795 Posts
|
You can't add back what is missing. All you can do is waste an obscene amount of processing time to smooth it over. And instead of a blocky pixelated video, you end up with a blurry larger video.
Each time you process it, you make it worse. Leave it be or find a better source. |
The Following 2 Users Say Thank You to OddBa11 For This Useful Post: |
20th January 2020, 17:33 | #7 | ||
Novice
Join Date: Oct 2019
Posts: 57
Thanks: 66
Thanked 223 Times in 47 Posts
|
Quote:
When the issue is color adjustment, I correct it on the player using madVR. But when we're talking about, among other things, blockiness, banding and aliasing, like in this case, then I may decide to filter it and recompress it. Quote:
|
||
20th January 2020, 18:59 | #8 | |
Mad Dog
Postaholic Join Date: Jul 2018
Location: Lost Paradise
Posts: 8,360
Thanks: 37,368
Thanked 69,236 Times in 8,673 Posts
|
Quote:
Do what you like with your videos, really. But don't expect any miracles from converting a low bitrate heavy compressed video into a huge one. I thought it was best to say the truth, than having you disillusioned down the road.
__________________
Live and let live. Live and learn. Liberate your mind. Embrace knowledge.
|
|
The Following 4 Users Say Thank You to SynchroDub For This Useful Post: |
29th January 2020, 14:40 | #9 |
Junior Member
Addicted Join Date: Aug 2016
Posts: 187
Thanks: 700
Thanked 524 Times in 154 Posts
|
Have you had any experience with Gigapixel for video? I have some DVDs that I want to rip using MakeMKV and then use this program to upscale them. The files I've tried(480p 1500kbps) do look better than the original, but the file sizes are pretty big.
|
The Following User Says Thank You to mrpoopybut For This Useful Post: |
29th January 2020, 15:39 | #10 | |
Mad Dog
Postaholic Join Date: Jul 2018
Location: Lost Paradise
Posts: 8,360
Thanks: 37,368
Thanked 69,236 Times in 8,673 Posts
|
Quote:
But, like I said, unless you really need to upconvert an SD video to HD for specific reasons (like, when you need to create a video with multiple different footage with different resolutions), I don't see any valid reason to upscale DVDs to HD, just to have a large pixelated video. You only gonna consume CPU/GPU power. The details of a pure HD/4K/8K video are simply not there.
__________________
Live and let live. Live and learn. Liberate your mind. Embrace knowledge.
|
|
The Following 3 Users Say Thank You to SynchroDub For This Useful Post: |
Thread Tools | |
|
|