How Can I Improve my video quality

[legend10]

Replying to this thread of all members are welcome. But I can't find any perfect solution from my thread. Some members view is that either increasing bitrate or decreasing resolution u can get better quality picture. I saw different forum where different encoder release their movie within 700mb. So my question is that how they do it ? After searching through internet about my mission & reading different many articles about encoding with low bitrate & most probably I came to my solution. Using HD Insane Profile & most important thing using Low Bitrate Quantization Matrices I have encoded 3 movies upto 700MB from 4.37Gb With 720p resolution. Here is one of my result-

[jagabo]

As far as any blockiness goes, it's only noticeable when you're right up on the screen. From a reasonable 5-6 ft viewing distance, on a large tv, it's not noticed.

No, it's noticeable on every moving edge. And there is no texture left. All the people look like mannequins. Every surface looks like plastic.

Anyway my original point here was that it is totally possible to make a great 720p rip of a bluray even at a file size around 800MB. Not one that's blurry, washed out and blocky, but actually watchable and enjoyable. We can debate the pro's and con's, but looking at my clips above I think it's been proven.

Hardly.

[Chef Goldblum]

Yeah I get it, jagabo. You don't agree. That's fine but I've gotten some good responses here in this thread and by PM, and from plenty of others as well. It's doubtful that anyone would have anything positive to say about everyone looking like a mannequin, etc.

[jagabo]

I sometimes watch video withe even worse quality. But I would never make my own encodings at that low quality.

[edDV]

Replying to this thread of all members are welcome. But I can't find any perfect solution from my thread. Some members view is that either increasing bitrate or decreasing resolution u can get better quality picture. I saw different forum where different encoder release their movie within 700mb. So my question is that how they do it ? ..

You missed the most important factor. Increase the quality of your source file. The higher quality the source, the more you can compress it while maintaining quality. Digital intermediates used to create a movie edit master are on the order of 4kx2k (4096×2160) at very high bit rates. Distribution copies range from 4k Digital Cinema to 1920x1080 Blu-Ray (~20-30 Mbps h.264) to multiple re-encoded TV broadcasts or cable. In the North America, tv/cable HD channels typically recode to 3 MPeg2 HD channels per 36 Mbps RF channel. ATSC broadcast of 1080i is ~12-17 Mbps average. DVB h.264 1080i is usually ~7-10 Mbps. By the time you capture off TV, the video has probably been re-encoded 3 times (4k to 1080i/720p, uplink or fiber distribution, TV station mux to ATSC/DVB).

Next most important for extreme compression is allocation of bit rate based on object motion, detail and exposure (e.g. blocks show first in dark areas and on diagonal edges). The more times a video has been re-encoded, the more corrupt the motion vectors. You can only squeeze the lemon so many times before you draw pulp. Encoding with constant quality setting allows the encoder to apply variable bit necessary for your desired quality setting. File size will vary by quality setting.

In other words, the film distributor with access to the 4k master will make a much higher quality 720p 800 Kbps copy than you can from a TV capture.

[Chef Goldblum]

You missed the most important factor. Increase the quality of your source file. The higher quality the source, the more you can compress it while maintaining quality.

DING DING DING! The most important component. If you are trying to compress something that you downloaded and has already been compressed, you are going to be disappointed. It's the GIGO principle at work!

[poisondeathray]

It's actually the opposite

At low bitrates, on lower parts of the compression curve, higher quality files with more detail , noise and/or grain, are more difficult to compress

This is the rationale for using denoisers or low bitrate matrices for high compression - they remove high frequency signals and smooth out details temporally - so you end up looking "plasticky" .