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ApsaraVideo Media Processing:Limits

Last Updated:Feb 04, 2024

This topic describes the limits on the features and service performance of ApsaraVideo Media Processing (MPS). We recommend that you take note of these limits and arrange your region-based topologies in advance before you use MPS.

Limits on features

Item

Limit

Scenario

MPS queue

By default, a standard MPS queue and an MPS queue for intelligent production are activated for each Alibaba Cloud account in each region. For more information about how to create or activate MPS queues of other types, see the Create an MPS queue in the MPS console section of the "Create an MPS queue" topic.

Create an MPS queue in the MPS console.

Jobs in an MPS queue

Each MPS queue can contain up to 10,000 jobs.

Submit an MPS job.

Concurrent jobs in an MPS queue

The maximum number of jobs that can concurrently run in an MPS queue depends on resources. For more information about the default concurrency of MPS queues, see Create an MPS queue.

Submit an MPS job.

Custom transcoding template

A maximum of 10 custom transcoding templates can be created within an Alibaba Cloud account in each region.

Create a transcoding template in the MPS console. For more information, see Transcoding templates.

Custom watermark template

A maximum of 10 custom watermark templates can be created within an Alibaba Cloud account in each region.

Create a watermark template in the MPS console. For more information, see Manage watermark templates.

Workflow

A maximum of 10 workflows can be created within an Alibaba Cloud account in each region.

Create a workflow in the MPS console. For more information, see Create a workflow.

Queries per second (QPS)

MPS limits the QPS of a single account for some API operations. For more information, see QPS limits.

Call the MPS API.

Limits on high-speed transcoding

High-speed transcoding is not supported for all videos. Before you enable high-speed transcoding, make sure that your video meets the following requirements.

Requirements on input files

  • File type: The input file must be a video and cannot be audio-only.

  • Video length: The length of the input file must be greater than 10 minutes. We recommend that you upload a video whose length is greater than 30 minutes.

  • Encoding format: The input file must be encoded in the H.264 or H.265 format, and cannot be encoded in the vp9, ac3, or ec3 format.

Requirements on output files

The output resolution must be 4K or lower.

Support for high-speed transcoding

High-speed transcoding is not supported for audio-only files. High-speed transcoding is supported for videos in scenarios other than container format conversion and transcoding in which timelines are involved. The following table describes the details.

Transcoding type

Whether high-speed transcoding is supported

Regular transcoding

Supported

Audio transcoding

Not supported

Container format conversion

Not supported

Narrowband HD™ 1.0

Supported

Narrowband HD™ 2.0

Supported

Super resolution

Supported

Frame interpolation

Supported

Video repair

Supported

SDR to HDR

Supported

HDR to SDR

Supported

SDR+

Supported

Dolby audio

Not supported

Transcoding feature

Parameter of an API operation

Whether high-speed transcoding is supported

Two-pass encoding

N/A

Supported

Audio extraction

Remove

Not supported

Video extraction

Remove

Not supported

Black bar removal

Crop

Supported

Video cropping

Crop

Supported

Black bar addition

Pad

Supported

Auto-rotate screen

LongShortMode

Supported

Video rotation

Rotate

Supported

Video merging

MergeList or MergeConfigUrl

Not supported

Video clipping

Clip

Supported

Video head and tail

OpeningList and TailSlateList

Not supported

Blurring

DeWatermark

Not supported if timelines are involved

Audio mixing

Amix

Not supported

Watermarking

WaterMarks

Not supported if timelines are involved

Subtitle hardcoding

SubtitleConfig

Not supported

Packaging

HLS and DASH

Not supported

HTTP Live Streaming (HLS) encryption

N/A

Not supported

Alibaba Cloud proprietary cryptography

N/A

Supported

Digital rights management (DRM) encryption

N/A

Not supported

References