Flash 编码 (FLV):首选比特率是多少?
我继承了一个项目,该项目将视频发送到远程编码器以编码为 FLV。
今天,我注意到我们要求他们以 1024kbps 进行编码,对我来说,这似乎非常高。
其他人都用什么? YouTube 使用什么来表示“标准”版本和“高质量”版本?
先感谢您。
I inherited a project that is sending videos off to a remote encoder to encode into FLVs.
Today, I noticed that we are asking them to encode at 1024kbps To me, this seems extremely high.
What is everyone else using? What is YouTube using for "standard" vs. "high quality" versions?
Thank you in advance.
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通常,“标准”质量视频的平均速度在 400-600kbps 之间。 较高质量的视频通常为 800-1200kbps,但对于许多人来说,这个比特率太高而难以维持,因此您不应该将这么高的速率作为唯一的速率,除非您知道目标受众将拥有快速连接。
为连接速度非常慢的人提供低比特率流(大约 250-300kbps)也是一个好主意,尽管即使使用 H.264,也很难让视频在这个速率下看起来很好,并且如果您仍在使用 VP6 那么就不要打扰,因为它看起来会很糟糕。
如果您要制作高清 (720p) 内容,那么比特率开始在 2500kbps 左右看起来相当不错,但这超出了许多互联网用户的能力范围。 (请注意,YouTube 使用 1000kbps 来表示他们所谓的高清,但实际上并非如此,因为数字阻塞非常糟糕。他们最好使用较低的分辨率。)
我们使用 272kbps/544kbps/1088kbps 表示低/中/分别是高质量的视频。
Typically somewhere between 400-600kbps is average for 'standard' quality video. Higher quality video is often 800-1200kbps, but for many people this is too high a bit rate to maintain, so you shouldn't really have something this high as your only rate unless you know your target audience will have fast connections.
It's also a good idea to offer a low bit-rate stream (somewhere around 250-300kbps) for people with really slow connections, although it's hard to get video to look good at this rate even with H.264, and if you're still using VP6 then don't bother because it will look awful.
If you're producing HD (720p) content then bit-rates start to look pretty good at around 2500kbps but this is out of the reach of many internet users. (Note that YouTube uses 1000kbps for what they call HD, but it really isn't, because the digital blocking is awful. They'd be better off using a lower resolution.)
We use 272kbps/544kbps/1088kbps for low/medium/high quality video respectively.
在 Ooyala,对于我们的可变速率编码,我们对大多数内容的编码速度从 225kbps 开始,最高可达 1.5-2mbps。
At Ooyala, for our variable-rate encoding, we encode starting at 225kbps, up to 1.5-2mbps, for most content.