How 网飞公司, Meta, 统一的云 Choose New Codecs 和 Why
Migrating to new codecs is fraught with challenges 和 complications for companies with massive content libraries like 网飞公司 和 Meta，或者像 统一的云. What drives change-of-codec decisions 和 what considerations 和 trade-offs complicate these decisions vis a vis legacy users 和 more?
Tim Siglin, Founding Executive Director, 帮助我流研究基金会, 特约编辑，流媒体， discusses these issues with Andrey Norkin, Senior 研究 Scientist - Video Algorithms, 网飞公司, Hassene Tmar, 技术项目经理, 视频的基础设施, Meta, 软件协调员, 急性中耳炎, 和博班·卡萨洛维奇, 产品经理, 流媒体, 联合云的片段 流媒体连接.
Siglin begins by asking Norkin what drives 网飞公司 to choose new codecs.
“An important factor is if it enables new applications,” Norkin says. “As in the case of 4K or HDR, you may know that you need a new codec if you want to stream that.” He also emphasizes the importance of projected device support, the particular features specific codecs may have for different streaming scenarios, 比如低比特率和实时编码, 投影设备支持.
Tmar from Meta says that they primarily focus on the specific benefits based on the needs of their users. “One of the examples we have seen is AV1 enabling a lot of quality for countries with much lower b和width,他说. He also notes that the cost of adding a new codec, 包括存储和转码, 也是一个主要考虑因素吗. “So we are actively working on optimizing that. And this is one of the main reasons we are moving away from AVC, because we don't want to keep yet another AVC rendition in terms of storage costs.” The number of videos they h和le 和 store 也是一个主要考虑因素吗. “在我们的用例中, we deal with approximately a few billion videos a day, we tend to try to keep all of those videos so that you can have your memories after 10 or 15 years,他说. “If we keep them in the original state that it came through, 在AVC高比特率流中, then we would be paying a lot for our storage. We could recompress that original video with much newer codecs, which will allow us to maintain quality at a much lower bitrate.”
Kasalovic says that three important factors exist for 统一的云 to determine when to choose a new codec. “The first one is device footprint coverage because this can be directly proportional to how much savings we can get on the IP network 和 the CDN side. And that can be very significant for our telcos,他说. The second factor to consider is the bitrate savings on a new codec versus previous ones. “And the third one is encoding complexity 和 how we are going to implement that codec,他说. Other aspects to think of, he says, are DRM support 和 supporting encapsulation. “在我看来,他说, “the best balance between all those things we have with HEVC is [that it is] slightly more expensive on the encoding side but has relatively good device coverage.”
See videos of the full program from 流媒体连接 February 2024 在这里.
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