4 ms·

> high-quality 1080p h.264 movie and television releases on torrent sites are usually around 5 Mbps. BRRips are frequently 30+GB for a 1-2 hour movie. Do the m

by wyager 5y ago

> high-quality 1080p h.264 movie and television releases on torrent sites are usually around 5 Mbps. BRRips are frequently 30+GB for a 1-2 hour movie. Do the math. You’re off by like 5-8x. > I have to ask -- where did you get the idea that "high quality 1080p is in the 200-400Mbps range"? From actually filming and editing video. Keep in mind that real-time encoders (such as the one in a video recorder or that zoom has to use for reasonable latency) are pretty constrained and will generally achieve worse ratios. If you need to get 3Mbps in real-time on a laptop your only option is basically to quantize the shit out of the video. Releases that can encode slower-than-real-time can use longer GOP, B-frames, etc. > It's almost all the way to raw uncompressed 1080p, which is 1,500 Mbps. 10bit 444 1080p60 is 3.7Gbps.

crazygringo 5y ago
> BRRips are frequently That's something entirely different, not what I was talking about. Also, if a Blu-Ray gives you the space, there's no reason not to use it. That doesn't mean you need it. Which is precisely why the rips that people commonly share don't. > From actually filming and editing video. That's for recording frames independently for editing on a professional camera. Not for anything you'd ever transmit live to a consumer in a million years. > will generally achieve worse ratios Worse than 200-400Mbps? What are you even talking about? Even an iPhone encodes to just 16 Mbps. Which is definitely not greater than 400. > basically to quantize the shit out of the video. Looks fine to me. It doesn't need to be lossless. It just needs to be good. I've never heard anyone complain about an iPhone "quantizing the shit" out of their video. To the contrary, people love iPhone-quality video. > 10bit 444 1080p60 is 3.7Gbps. Obviously I'm talking about 8-bit 30fps (444).
gsich 5y ago
>BRRips are frequently 30+GB for a 1-2 hour movie. Do the math. You’re off by like 5-8x. No. First, 1-2 hour is a 100% increase. 15GB for a 2hour movie is realistic, with a very high quality (CRF 18 or 19). Which would then be ~15Mbps, considering that there is also audio. Going further does not increase quality, but does increase file size. It seems to me that you want to transfer an intermediate-codec (or even raw) via the Internet.
topranks 5y ago
Where you go wrong here is that a webcam image is pretty stable. Same background, person moving a little. Sure it can't be as optimal as a non real-time compressor can, and should therefore need more bandwidth, but high compression ratios on such an image aren't difficult. It's not valid to compare professional film work or even output BluRay encodes to what's required for your typical home video call.
- wyager 5y ago
  That’s a fair point.
ubercow13 5y ago
What kind of camera is recording 1080p at 200-400Mbps? For example here https://www.red.com/recording-time https://www.red.com/recording-time if I put in 8K, 60fps and choose the lowest compression ratio, it's still saying it will only use 270Mbps. At 2K the highest bitrate seems to be 41Mbps.

by wyager 5y ago

crazygringo 5y ago

> BRRips are frequently That's something entirely different, not what I was talking about. Also, if a Blu-Ray gives you the space, there's no reason not to use it. That doesn't mean you need it. Which is precisely why the rips that people commonly share don't. > From actually filming and editing video. That's for recording frames independently for editing on a professional camera. Not for anything you'd ever transmit live to a consumer in a million years. > will generally achieve worse ratios Worse than 200-400Mbps? What are you even talking about? Even an iPhone encodes to just 16 Mbps. Which is definitely not greater than 400. > basically to quantize the shit out of the video. Looks fine to me. It doesn't need to be lossless. It just needs to be good. I've never heard anyone complain about an iPhone "quantizing the shit" out of their video. To the contrary, people love iPhone-quality video. > 10bit 444 1080p60 is 3.7Gbps. Obviously I'm talking about 8-bit 30fps (444).

gsich 5y ago

>BRRips are frequently 30+GB for a 1-2 hour movie. Do the math. You’re off by like 5-8x. No. First, 1-2 hour is a 100% increase. 15GB for a 2hour movie is realistic, with a very high quality (CRF 18 or 19). Which would then be ~15Mbps, considering that there is also audio. Going further does not increase quality, but does increase file size. It seems to me that you want to transfer an intermediate-codec (or even raw) via the Internet.

topranks 5y ago

Where you go wrong here is that a webcam image is pretty stable. Same background, person moving a little. Sure it can't be as optimal as a non real-time compressor can, and should therefore need more bandwidth, but high compression ratios on such an image aren't difficult. It's not valid to compare professional film work or even output BluRay encodes to what's required for your typical home video call.

wyager 5y ago
That’s a fair point.

ubercow13 5y ago

What kind of camera is recording 1080p at 200-400Mbps? For example here https://www.red.com/recording-time https://www.red.com/recording-time if I put in 8K, 60fps and choose the lowest compression ratio, it's still saying it will only use 270Mbps. At 2K the highest bitrate seems to be 41Mbps.