So High Profile might be like the English Wikipedia page for the Saturn Ⅴ, Main Profile is like the Simple English Wikipedia page, and Baseline would be like the Up Goer Five. So remember my words analogy? Setting a Profile is like setting up the level of complexity of the words it can use. So if you have a hardware video player (like a Roku) and it says something like "I can only handle 1080p29.97 Main Profile" then any video encoded at Main Profile at 1080p29.97 or lower will play on it, and if you throw a High Profile video at it, it'll know it can't handle it. The MPEG (and other codec developers too) use Profiles to establish levels of computational complexity in a given encoded video to ensure compatibility. Here's a good video that explains and demonstrates what's going on. Fewer "words" to describe what's happening in your video, resulting in blurry, muddy images, because it just can't describe it all within your limits. When you're encoding video and you don't give it a high enough bitrate that's sort of what you end up with.
Same scene, but different level of detail. There was a tall leather chair, turned slightly away from the window. It was a dark room, but it had a big window. However a low bitrate version might be more like this: It was worn, but seemingly well cared for, save for the small cigarette burn on the left arm. A brown leather high-backed chair sat near it, askew, it's back slightly turned to it, as if to allow one to hide in the wings to escape the light. The curtains were drawn open, a sole shaft of light emanating from outside the only illumination. The room was dark and musty, evocative of an old Victorian mansion, with a high ceiling, and a window that stretched almost the entire height of the wall.
So a high bitrate might be something like this. Setting the bitrate is like setting how many words you can use to describe it in writing. In this case you're telling the encoder it has 24,000,000 bits (24 megabits, though mebibits are technically preferred) to store (describe) one second's worth of video.Ī good way to think about this is like words on a page. The bitrate is setting the amount of bits it can use to store the video. Except you're cramming four times more visual information ( 120=30×4) into the same bitrate and that's the problem. 24MbPS is a mid-range target bitrate for an average amount of motion and detail in a 1080p29.97 video. That may be a limitation of the Sony encoding library because the need for high frame rate is extremely niche.Īs far as the quality issue goes, you're way undershooting your bitrate that that's the problem, and you're using Main Profile. Beyond that, what does your video gain by having such a high frame rate? Does having more temporal resolution really add anything to your video?įor some reason i can only render it in 120, with bad quality! I don't even think YouTube will stream at that frame rate. The vast majority of people don't even have 144Hz panels. OK, first off, why⁇ Nobody is going to watch your video at 144p.
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