行业 / 视频流媒体

视频与媒体工程

视频转码 &
流媒体管道工程

从采集到播放：自适应流媒体管道，依据 Apple HLS Authoring、Netflix Photon 和 Amazon Prime Video 的公开交付规范构建并通过质检。硬件编码、multi-DRM 及 SCTE-35 广告插入，适用于生产级规模。

讨论您的管道方案播放器与 UI 专业能力
已验证的专业能力

我们的工程能力

以下每项能力均已投入生产，并使用规范本身的术语加以描述。

自适应流媒体管道

HLS、LL-HLS、CMAF、DASH 全链路。Per-title 编码阶梯、ABR 逻辑及 Manifest 生成，依据 Apple HLS Authoring、Netflix Photon 和 Amazon Prime Video 的公开交付规范构建并验证。

硬件与软件编码器

NETINT Quadra VPU T1A/T2A、NVENC、Intel Quick Sync、AMD VCN 用于硬件加速。x264、x265、SVT-AV1、VVenC 用于软件编码路径。根据延迟和成本目标选择编解码器。

multi-DRM 内容保护

FairPlay、Widevine 和 PlayReady，支持 CENC 与 cbcs 加密方案。密钥轮换、许可证服务器集成及 PSSH Box 生成。

广播与广告插入

IMF（SMPTE ST 2067）打包、HLS Interstitials、SCTE-35/104 信号注入，以及基于内容信号的 AI 驱动广告断点检测。

质量指标与 QC

逐 Segment 计算 VMAF、PSNR、SSIM，并呈现于运维仪表盘。Segment 打包前执行自动化 QC 门控。

可观测性

OpenTelemetry 追踪贯穿编码 → 打包 → Origin。Kafka 事件流提供 Segment 级遥测。延迟、stall rate 和错误峰值告警。

在线演示

转码管道仪表盘 — 实时演示

视频转码农场的交互式仿真：8 个 Worker 节点执行 ABR 阶梯生成，实时展示作业进度、Worker 吞吐量和质量门控。管道每 2 秒推进一次。

Transcoding cluster — demo3 active · 7 queued · 41 completed today
HealthyLive09:14
HealthHealthy
HealthyAPI + worker heartbeat
Active jobs
37 waiting in queue
Completed today
411 failed
Throughput
96GB/h processed
Success rate
97.4%Rolling 24h
Throughput — 24h

GB/h processed across all encode and packaging workers.

00
03
06
09
12
15
18
21
Current
96 GB/h
3 active · 7 queued
Peak today
120 GB/h
Ø 87 GB/h
Completed today
41
1 failed · 97.4% success

Live progress

Queue and in-flight jobs. Progress advances while the simulation is running.

feature_reel_master.mov

job-2401 · HLS 1080p H.264 · worker-01

42%~7 min
Runningworker-01

promo_cutdown_v3.mp4

job-2402 · HLS 720p HEVC · worker-02

68%~3 min
Runningworker-02

trailer_uhd_source.mxf

job-2403 · MP4 4K HEVC · worker-04

18%~14 min
Runningworker-04

episode_s02e04.mp4

job-2404 · HLS 1080p H.264

0%queued
Queuedunassigned

sizzle_alt_audio.mov

job-2405 · AAC 5.1

0%queued
Queuedunassigned

Pipelines

Saved pipelines. Run starts a local mock job when a worker is idle.

pipeline-hls-main

/ingest/features → HLS

Last run: 2 min ago
Running
pipeline-cmaf-abr

/ingest/promos → CMAF

Last run: 1 h ago
Idle
pipeline-mp4-mezz

/ingest/mezzanine → MP4

Last run: yesterday
Idle

Workers

Connected encode and packaging workers. Busy nodes track the assigned job progress.

worker-01

10.0.12.11 · transcode

Busy

HLS 1080p H.264

42%job-2401

worker-02

10.0.12.12 · transcode

Busy

HLS 720p HEVC

68%job-2402

worker-03

10.0.12.13 · transcode

Idle

Waiting for the next job

worker-04

10.0.12.14 · packaging

Busy

MP4 4K HEVC

18%job-2403

Video profiles

Encode ladders used by pipelines and manual uploads.

NameResolutionCodecBitrateFrame rate
HLS 1080p H.2641920×1080H.2645 Mbps25 fps
HLS 720p HEVC1280×720H.2653 Mbps25 fps
MP4 4K HEVC3840×2160H.26512 Mbps25 fps
HLS 480p H.264854×480H.2641.5 Mbps25 fps

Audio profiles

Audio encode presets for stereo and surround delivery.

NameCodecChannelsSample rateBitrate
AAC StereoAAC2.048 kHz192 kbps
AAC 5.1AAC5.148 kHz384 kbps
AC-3 BroadcastAC-35.148 kHz448 kbps

ABR ladder

Adaptive bitrate renditions ordered by resolution. Bar length is relative to the top rendition's bitrate.

MP4 4K HEVC3840×2160 · H.26512 Mbps · 25 fps
HLS 1080p H.2641920×1080 · H.2645 Mbps · 25 fps
HLS 720p HEVC1280×720 · H.2653 Mbps · 25 fps
HLS 480p H.264854×480 · H.2641.5 Mbps · 25 fps

Quality metrics (VMAF)

Per-rendition quality probes against the mezzanine. VMAF ≥ 90 passes, 80–90 watched, below 80 fails QA.

RenditionResolutionCodecBitrateVMAFPSNRSSIMQA
4K HEVC3840×2160H.26512 Mbps96.844.10.987Pass
1080p H.2641920×1080H.2645 Mbps94.242.60.979Pass
1080p HEVC1920×1080H.2654 Mbps95.143.00.982Pass
720p HEVC1280×720H.2653 Mbps92.440.80.969Pass
480p H.264854×480H.2641.5 Mbps87.637.20.941Watch
360p H.264640×360H.2640.8 Mbps81.334.10.912Watch

S3 connectors

Public connector metadata only — name, region and bucket. No access keys or secrets.

connector-media-in

eu-central-1 · media-ingest-prod

Connected

Credentials are never shown in this demo.

connector-delivery-out

eu-west-1 · delivery-packaging

Connected

Credentials are never shown in this demo.

connector-archive

us-east-1 · media-archive-cold

Error

Credentials are never shown in this demo.

DRM settings

Neutral packaging and key-rotation options for protected outputs.

Content protection

Enabled · rotation every 24h

Provider

Widevine + FairPlay

Packaging

CMAF + HLS

Event log

Live pipeline events from scheduler, workers, packager and QA probes.

09:14schedulerPipeline pipeline-hls-main started · 3 jobs dispatched
09:14worker-01Assigned job-2401 · HLS 1080p H.264
09:14packagerCMAF segment #1 written · 2.4 MB
09:13connector-archiveS3 HEAD timeout · retry 1/3
09:12qaVMAF probe complete · 4K HEVC 96.8

Demonstration UI composed from shacdn primitives. Not connected to a live cluster.

技术参考

格式、编码器与标准

我们在生产环境中集成的格式与硬件。

流媒体格式
HLSLL-HLSCMAFDASHIMF (SMPTE ST 2067)ProRes
硬件编码器
NETINT Quadra VPU T1ANETINT Quadra VPU T2ANVENCIntel Quick SyncAMD VCN
软件编码器
x264x265SVT-AV1VVenC
DRM 方案
FairPlayWidevinePlayReadyCENCcbcs
质量与插入
VMAFPSNRSSIMSCTE-35SCTE-104HLS Interstitials
差异化优势

依据公开交付规范构建

Netflix Photon 一致性

输出包通过 Netflix Photon Conformance 工具检验。CMAF Segment 结构、时序元数据和编解码器约束依据 Photon 公开要求验证后再交付。

Apple HLS Authoring Specification

Manifest 和 Segment 依据 Apple HLS Authoring Specification 验证，涵盖 HEVC、FairPlay 加密和 HLS Interstitials。码率阶梯和时序要求依据公开创作指南检查。

Amazon Prime Video ingest

编码阶梯和打包方案与 Amazon Prime Video 已记录的 Ingest Profile 对齐，包括 HDR 元数据透传和依据公开要求的音频响度归一化。

交付成果

您将获得

编码阶梯文档

Per-title 分析报告，包含各编解码器的码率和分辨率目标，并附实测 VMAF 评分和文档化依据。

基础设施与硬件选型

针对 NETINT、NVENC 和软件路径，实测每小时处理视频的成本，并提供面向目标吞吐量的硬件规模建议。

打包与 DRM 配置

HLS/DASH/CMAF Manifest、CENC/cbcs 加密、密钥轮换计划及许可证服务器集成，经端到端测试验证。

运维仪表盘

实时 QoE 与质量指标 — VMAF、stall rate、延迟 — 配置针对您 SLO 的告警阈值，并在 Grafana 或同等工具中展示。

Runbook 与告警

常见故障模式的文档化 Runbook，以及针对您的事件管理工具配置的值班告警路由。

压测后移交

管道在目标吞吐量下完成验收，附文档化移交包和交付后一周的支持窗口。

正在优化转码管道？

告知您的采集格式、输出目标和规模要求 — 我们将为您规划符合成本与延迟目标的架构和硬件方案。

联系我们云基础设施专业能力