Tag: h.264

Amazon EC2 推出 VT1 Instance

看到 Amazon EC2 推出新機種 vt1，專門為影片壓縮而推出的 family type：「New – Amazon EC2 VT1 Instances for Live Multi-stream Video Transcoding」。

主要是透過 Alveo U30 Data Center Accelerator Card 這張卡加速，號稱比 GPU 機器還要省 30% 的費用 (CPU 的話可以到 60%)：

These VT1 instances feature Xilinx® Alveo™ U30 media accelerator transcoding cards with accelerated H.264/AVC and H.265/HEVC codecs and provide up to 30% better price per stream compared to the latest GPU-based EC2 instances and up to 60% better price per stream compared to the latest CPU-based EC2 instances.

看規格支援 H.264 與 H.265，不過看起來沒支援 royalty-free 的 VP9 與 AV1...

另外這跟 AWS Elemental MediaConvert 以及 AWS Elemental Live 好像稍微有點打對台？另外專利的費用不知道怎麼算...

Cisco 的 H.264 實作放出來了...

Cisco 在十月宣佈的 Open source H.264 codec 已經在 GitHub 上放出來了：「Open Source H.264 Codec」，這個實作包括了 encoder 與 decoder。

用的是 BSD 2-Clause License：「LICENSE」。

目前的支援度：(直接複製 OS Support 這段)

  • Windows 64-bit and 32-bit (initial release is only 32-bit, 64-bit will follow soon)
  • Mac OS X 64-bit (initial release does not include this target, will follow soon)
  • Linux 64-bit and 32-bit (initial release is only 32-bit, 64-bit will follow soon)
  • Android 32-bit (initial release does not include this target, will follow soon)
  • iOS 64-bit and 32-bit (not supported yet, may be added in the future)

看起來目前只支援桌機上的 32bits...

然後已知的問題：(複製 Known Issues 這段)

  • Encoder errors when resolution exceeds 3840x2160
  • Encoder errors when compressed frame size exceeds half uncompressed size
  • Encoder console app only support multiple of 16 width/height for now
  • Decoder errors when compressed frame size exceeds 1MB

反正就繼續看著辦？