Manifest Filtering - AWS Elemental MediaPackage

Manifest Filtering

With manifest filtering, MediaPackage dynamically produces client manifests based on parameters that you specify in a query appended to your playback request. This enables you to do things such as restrict viewer access to premium 4K HEVC content, or target specific device types and audio sample rate ranges—all from a single endpoint. Previously, you would have to configure multiple endpoints to accomplish this behavior. MediaPackage now provides a cost-effective way to dynamically produce different client manifests on the same endpoint.

Working with manifest filters

When you use a manifest filter, the resulting manifest includes only the audio and video streams that match the characteristics that you specify in your query. If no manifest filter is used, then all of the ingested streams are present in the endpoint output stream. The exception to this is if you have set stream filters for the endpoint, such as minimum video bitrate. In that case, the manifest filter is applied after the stream filter, which could skew your output, and is not recommended.

Manifest filtering can be used on all endpoint types supported by MediaPackage:

  • Apple HLS

  • DASH-ISO

  • Microsoft Smooth

  • CMAF

To use manifest filtering, append aws.manifestfilter query parameters to your playback request to MediaPackage. MediaPackage evaluates the query, and serves a client manifest based on those query parameters. Manifest queries are not case-sensitive and can be up to 1024 characters long. If the query is malformed, or if it there aren't streams that match the query parameters, MediaPackage returns an incomplete or empty manifest. For query syntax, see the following section.

Note

If you are using Apple HLS or CMAF endpoints, special conditions apply. For information about these conditions, see Special conditions for HLS and CMAF manifests.

Query syntax

The base query parameter is aws.manifestfilter, which is followed by optional parameter name and value pairs. To construct the query, append ?aws.manifestfilter= to the end of the MediaPackage endpoint URL, followed by parameter names and values. For a list of all of the available parameters, see Manifest filter query parameters.

An Apple HLS filter query might look like this:

https://example-mediapackage-endpoint.mediapackage.us-west-2.amazonaws.com/out/v1/examplemediapackge/index.m3u8?aws.manifestfilter=audio_sample_rate:0-44100;video_bitrate:0-2147483647;video_codec:h265;audio_language:fr,en-US,de

The query syntax is listed in the following table.

Query String Component Description
? A restricted character that marks the beginning of a query.
aws.manifestfilter= The base query, which is followed by parameters constructed of name and value pairs. For a list of all of the available parameters, see Manifest filter query parameters.
: Used to associate the parameter name with a value. For example, parameter_name:value.
; Separates parameters in a query that contains multiple parameters. For example, parameter1_name:value;parameter2_name:minValue-maxValue.
, Separates a list of values. For example, parameter_name:value1,value2,value3. Comma-separated values in a list imply an OR relationship.
- Used to define a parameter's minimum - maximum value range. For example, audio_sample_rate:0-44100. When a numerical value is used in a range, it is included in the range definition. This means that streams must be greater than or equal to the minimum value, and less than or equal to the maximum value. With ranges, the minimum and maximum values are mandatory. The supported range values are 0 - 2147483647.
Note

If you use Amazon CloudFront as your CDN, you might need to set additional configurations. For more information, see Configure cache behavior for all endpoints..

Manifest filter query parameters

MediaPackage supports the following query parameters.

Category Name Description Example
Audio audio_channels
  • The number of audio channels.

  • Accepted values: Two integers aggregated with a dash that define an inclusive range. The supported range values are 1 - 32767.

stream.mpd?aws.manifestfilter=audio_channels:1-8
Audio audio_codec
  • Audio codec type.

  • Accepted values: AACL, AACH, AC-3, EC-3. You must include the - for AC-3 and EC-3.

    The values are not case-sensitive.

stream.mpd?aws.manifestfilter=audio_codec:AACL,AC-3
Audio audio_language
  • Audio languages or functional codes derived from encoder passthrough.

  • Accepted values: Arbitrary strings, such as two or four character ISO-639-1 language codes. You must use the same language strings that are set for your encoder.

    The values are not case-sensitive.

stream.mpd?aws.manifestfilter=audio_language:fr,en-US,de
Audio audio_sample_rate
  • Audio sample rate in Hz.

  • Accepted values: Two integers aggregated with a dash that define an inclusive range. The supported range values are 0 - 2147483647.

stream.mpd?aws.manifestfilter=audio_sample_rate:0-44100
Subtitle subtitle_language
  • The subtitle language(s) or functional codes derived from encoder passthrough.

  • Accepted values: Arbitrary strings, such as two or four character ISO-639-1 language codes. You must use the same language strings that are set for your encoder.

    The values are not case-sensitive.

stream.mpd?aws.manifestfilter=subtitle_language:en-US, hi
Video video_bitrate
  • Video bitrate in bits per second.

    Note

    If you're using this parameter, we recommend that you use only the video_bitrate filter parameter to set the video bitrate. Don't also set the minimum and maximum video bitrate via the MediaPackage console or AWS CLI. The video_bitrate filter applies to the video bitrate settings created at the endpoint. If you use the parameter and set the bitrate in the console or AWS CLI, your output might be skewed.

  • Accepted values: Two integers aggregated with a dash that define an inclusive range. The supported range values are 0 - 2147483647.

  • Note

    You can't use this parameter with trick play streams.

stream.mpd?aws.manifestfilter=video_bitrate:0-2147483647
Video video_codec
  • Video codec type.

  • Accepted values: H264, H265.

    The values are not case-sensitive.

stream.mpd?aws.manifestfilter=video_codec:h264
Video video_dynamic_range
  • Video dynamic range.

  • Accepted values: hdr10, hlg, sdr.

    The values are not case-sensitive.

stream.mpd?aws.manifestfilter=video_dynamic_range:hdr10
Video video_framerate
  • Video frame rate range in the NTSC format.

  • Accepted values: Two floating-point numbers aggregated with a dash that define an inclusive range. Each number can have up to three optional fractional values. For example, 29.97 or 29.764. The supported range values are 1 - 999.999.

stream.mpd?aws.manifestfilter=video_framerate:23.976-30
Video video_height
  • The height of the video in pixels.

  • Accepted values: Two integers aggregated with a dash that define an inclusive range. The supported range values are 1 - 32767.

stream.mpd?aws.manifestfilter=video_height:720-1080

Manifest filtering examples

These are manifest filtering examples.

Example 1: Target a player that supports AVC and a 44.1k audio sample rate

The viewer is playing content on a device that can only support AVC and a 44.1k audio sample rate. You set the video_codec and audio_sample_rate to filter out streams that don't fit these requirements.

?aws.manifestfilter=audio_sample_rate:0-44100;video_codec:h264

Example 2: Restrict 4k HEVC content

Your 4K HEVC stream is 15 Mbps, and all your other streams are less than 9 Mbps. To exclude the 4K stream from the stream set, you set a threshold of 9,000,000 bits per second to filter out the higher bitrate.

?aws.manifestfilter=video_bitrate:0-9000000

Example 3: Include video between 23.976 and 30 frames per second

To only include video within a certain frame rate range, use video_framerate. This parameter accepts floating-point numbers with up to three optional decimal values.

?aws.manifestfilter=video_framerate:23.976-30

Special conditions for HLS and CMAF manifests

If you are using HLS or CMAF manifests, these special conditions apply.

  • For HLS manifests, we strongly recommend that you use audio rendition groups to avoid removing the video streams that are multiplexed with the audio streams that are filtered out. For more information about rendition groups, see Rendition Groups Reference in AWS Elemental MediaPackage.

  • In HLS and CMAF manifests, the audio sample rate is not signaled, so it's not easy to visually check the original or filtered manifests for this setting. To verify the audio sample rate, check the audio sample rate at the encoder level and output level.

  • In HLS and CMAF manifests, the BANDWIDTH attribute for a variant associates the bandwidth of the audio track with the video track, whether it is multiplexed with the video track, or if it is an audio rendition track referenced by the video track. Therefore you can't visually inspect the original and filtered manifests to confirm the video_bitrate filter has worked. To verify the filter, check the video bitrate at the encoder level and output level.

  • For HLS and CMAF manifests, request parameters appended to bitrate playlists or segments result in an HTTP 400 error.

Error conditions

Common error conditions are listed in the following table.

Error Condition Example HTTP Status Code
A list parameter is not found and is not part of a constrained list ?aws.manifestfilter=audio_language:dahlia 200
Only subtitle streams are present in the stream ?aws.manifestfilter=audio_sample_rate:0-1;video_bitrate=0-1 200
Duplicate filter parameter ?aws.manifestfilter=audio_sample_rate:0-48000;aws.manifestfilter=audio_sample_rate:0-48000 400
Invalid parameter ?aws.manifestfilter=donut_type:rhododendron 400
Invalid range parameter ?aws.manifestfilter=audio_sample_rate:300-0 400
Invalid range value (more than INT_MAX) ?aws.manifestfilter=audio_sample_rate:0-2147483648 400
Malformed query string ?aws.manifestfilter=audio_sample_rate:is:0-44100 400
Parameter string is greater than 1024 characters ?aws.manifestfilter=audio_language:abcdef.... 400
Query parameters on an HLS or CMAF bitrate manifest index_1.m3u8?aws.manifestfilter=video_codec:h264 400
Query parameters on a segment request ..._1.[ts|mp4|vtt..]?aws.manifestfilter=video_codec:h264 400
Repeated query parameter ?aws.manifestfilter=audio_sample_rate:0-48000;aws.manifestfilter=video_bitrate:0-1 400
Application of the filter results in an empty manifest (content has no streams that meet the conditions defined in the query string) ?aws.manifestfilter=audio_sample_rate:0-1;video_bitrate=0-1 400