GPU capabilities

1

The specs for the KB3288 state that it can decode 2160@24fps H.264 video.

What I'm taking away from this is that this computer can play any 2160 H.264 video at 24fps, which doesn't really make sense to me because I thought that the capabilities of a GPU to play something were directly related to how much data it has to go through. This is dictated by the frame rate, resolution, and bitrate.

What is the limiting factor here? What dictates how well a video will play?

occamsrazor

Posted 2016-04-02T03:48:23.887

Reputation: 13

The bit-rate of the compressed, encoded video should never be a problem for a GPU. The bit-rate is more of a concern during thetransmission of the video, not when it's being decoded. It's the uncompressed, decoded output at full resolution and frame rate that can tax the bandwidth of the GPU. – sawdust – 2016-04-02T05:27:00.377

Thanks. Want to put that as an answer so I can mark it? – occamsrazor – 2016-04-02T05:27:55.193

Answers

1

The bit-rate of the compressed, encoded video should never be a problem for a GPU. The bit-rate is more of a concern during the transmission of the video, not when it's being decoded.

It's the uncompressed, decoded output at full resolution and frame rate that can tax the bandwidth of the GPU. The bit-rate of this output is much greater than the input bit-rate (that's why lossy video codecs were developed), and is more usefully expressed as resolution at a frame-rate than bits-per-second.

sawdust

Posted 2016-04-02T03:48:23.887

Reputation: 14 697

Asked: 2016-04-02T03:48:23.887

Viewed: 40 times

Active: 2016-04-02T05:36:20.190