AVC/H.264编解码器最终衰落?
像AV1这样的“新兴”编解码器, VP9, HEVC are hardly newcomers to the streaming scene, their implementation and breadth of industry support—particularly AV1’s—has grown by leaps and bounds. Yet the long-in-the-tooth AVC/MPEG-4 Part 10 just won’t go away, largely because of its tried-and-true every-device support, even though the superior efficiencies of more advanced codecs are legion. 那么，到2024年，AVC离过时有多近呢?
Tim Siglin，创始执行董事， 帮助我流研究基金会, 特约编辑，流媒体, discusses this topic with Sean Gardner, Head, Video Strategy & 市场开发，AECG， AMD, Hassene Tmar, Technical Program Manager, Video Infrastructure, Meta, Software Coordinator, AOM, Andrey Norkin, Senior 研究 Scientist - Video Algorithms, 网飞公司，在这个剪辑中 流媒体连接2024.
西格林对小组成员说, “The question seems to come up every five to seven years because AVC is the majority of what we encode in. 我们是否达到了一个交叉点, not just for another codec that would be encoding the same amount as AVC but also for a combination of other codecs that would be encoding the same as AVC? We've constantly said we will replace AVC, yet we still seem to encode in AVC [regularly]. 那么交叉在哪里呢?”
加德纳说, “AVC will continue to be a dominant codec for quite some time, (但)它的份额肯定在下降. I think AV1 [works best] for some applications. 我认为我们会看到一些VVC, t在这里 are even additional things like LCEVC, 哪些可以与AVC联合使用. 所以我们会看到更多的分裂, [and] I don't think we'll ever get to the same single codec ideal that we had hoped for. Some applications have significantly different pain points or economics and different application requirements, 无论是潜伏期还是其他因素. So, some applications will continue to use AVC. I think in order to make the economics work, we'll need to move to a newer codec. Cloud gaming, for example, really couldn't make sense economically using AVC.”
Tmar说, “从Meta的角度来看, I think we're getting to a point w在这里 we are seeing that AVC is not enough anymore, although we still encode every video as of today into an AVC rendition due to the lack of support of other codecs, 特别是移动设备, which is the biggest population of target client devices that we see. But as of this year, we are starting to see that cross point. 我们也把它流到VP9和AV1上. And we're at a point w在这里 we're hoping to move from the minimum codec requirement from being AVC to VP9. And so AVC will be only [be used] as a legacy support as compared to every video. 然后，VP9可能是主要部分. I know that our set of applications is a little different, but this is what we see on our side. It's been quoted publicly that more than 70% of our watch time on iOS is already in AV1, 这个数字还在增长.”
Norkin says, “For 网飞公司, the [amount] of devices that we have to stream to is somewhat bigger. 比如，它包括很多电视. 我们看到的是，在过去的一年里, t在这里 has been quite an uptake in AV1 streaming, 但我们还有AVC作为后备. 所以当没有其他东西可以流媒体时, 你回到AVC, I expect that at least some AVC decoders will be t在这里 because of [older] devices. 基本上, 对网飞公司, at least for the VOD distribution of the codecs, it primarily depends on the devices' decoder support. So when we see more devices coming with newer codecs, then we'll see more streaming with these new products.”
See videos of the full program from 流媒体 Connect February 2024 在这里.
We'll be back in person for 纽约流媒体 May 20-22, 2024. 更多细节请点击这里.
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