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Media Processing Service
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    Audio/Video Transcoding Template

    Last updated: 2024-12-16 17:13:33
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      Overview

      You can preset different processing parameters for different application scenarios by configuring audio/video transcoding templates, so that they can be reused later.
      If you need to process video files, you can configure video transcoding templates, including general video transcoding templates, Top Speed Codec (TSC) transcoding templates, video adaptive bitrate streaming templates, and remuxing templates.
      If you need to process audio-only files, you can configure audio transcoding templates, including general audio transcoding templates, TSC audio transcoding templates, and audio adaptive bitrate streaming templates.
      For a brief introduction to each feature, refer to the table below:
      Applicable Input Source
      Feature
      Description
      Video
      General transcoding
      It can reduce the video bitrate and change the encoding standard, resolution, frame rate, and other parameters of the original bitstream, thus adapting to playback on different terminals and in different network environments.
      TSC transcoding
      TSC transcoding is an "upgrade" of General Transcoding. It can adaptively optimize different types of videos, providing users with a clearer viewing experience at lower bandwidth. While ensuring or even improving image quality, it can save bandwidth costs by 50%+.
      Video adaptive bitrate streaming
      It can convert the input original video file into multiple bitstreams suitable for playback in different scenarios, so that users can choose a video with an appropriate bitrate for playback based on their network, thereby enhancing user experiences.
      Remuxing
      It can change the container format of the original video file.
      Audio
      General audio transcoding
      It can reduce the audio bitrate and change the encoding standard, sample rate, channel, and other parameters, thus adapting to playback on different terminals and in different network environments.
      TSC audio transcoding
      TSC audio transcoding is an "upgrade" of general audio transcoding. It can adaptively optimize different types of audio to provide users with a better audio experience with lower bandwidth.
      Audio adaptive bitrate streaming
      It can convert the input original audio file into multiple bitstreams suitable for playback in different scenarios, thereby adapting to different network conditions and enhancing user experiences.

      Video Transcoding Templates

      1. General Transcoding

      MPS provides preset General Transcoding Templates, which can be used directly. You can also click Create template to customize your own General Transcoding Templates.
      

      Table of Detailed Configuration Item Description

      Item
      Description
      Template name
      Max 64 characters; supports Chinese characters, letters, digits, underscores (_), hyphens (-), and periods.
      Container format
      MP4, FLV, HLS, MXF, MOV, TS, WEBM, and MKV.
      Configuration Item
      Video parameters (required) and audio parameters (optional).
      
      Segmentation Rules
      
      (configurable when the container format is HLS)
      Multipart Format
      TS, MP4.
      Data Sharding
      Segment File (segment), Single File (single-file).
      Note: Single File requires the server to support byte range requests. Not all HLS devices and players support a single file/byte range.
      Average Segmentation Duration
      The following two methods are supported:
      Automatic
      Custom: Fill in the average segment duration (in s).
      Segment Duration at Startup
      This configuration item is disabled by default.
      Once it is enabled, you can set a special average duration for the first few segments of the video. For example, set the first segment to have a shorter duration than other segments to reduce video buffering time and improve user experiences. Enter an integer value greater than or equal to 1.
      Number of Effected Segments
      It is used to specify the number of the first few video segments to take effect when Segment Duration at Startup is enabled. Enter an integer value greater than or equal to 1.
      Video Parameters
      Encoding standard
      H.264, H.264 intra, H.265, AV1, H.266, MV-HEVC, MPEG2, VP8, and VP9.
      
      Resolution & Bitrate
      
      Bitrate Control Mode
      The following four bitrate control modes are supported:
      1. VBR (default): variable bitrate. The bitrate of the output is adjusted dynamically based on the complexity of video images, resulting in higher image quality. It is suitable for storage scenarios as well as applications requiring high image quality.
      2. ABR: average bitrate. The average bitrate of the output video is kept stable to the greatest extent, but short-term bitrate fluctuations are allowed. It is suitable for scenarios where minimizing the overall bitrate is required while a certain image quality is maintained.
      3. CBR: constant bitrate. The bitrate of the output is kept constant during the video encoding process without considering changes in image complexity. It is suitable for scenarios with strict network bandwidth requirements.
      4. CRF: constant quality factor. Video quality is controlled by setting a quality factor to achieve constant quality encoding of videos, with the bitrate adjusted automatically based on the complexity of the content. It is suitable for scenarios requiring stable image quality.
      CRF Value
      Video constant bitrate control factor, supporting the following two modes:
      Automatic: The CRF value is automatically selected.
      Custom: The range of the CRF value is 0 to 51, where 0 means lossless compression and 51 means maximum compression. The typically recommended value range is 18 to 28, where 18 represents a low compression ratio with high quality and 28 represents a high compression ratio with low quality.
      Note:
      When the bitrate control mode is set to VBR and the CRF value is configured, MPS will process the video in VBR mode according to the CRF value and the average bitrate upper limit, to balance the video quality, bitrate, transcoding efficiency, and file size.
      When the bitrate control mode is set to CRF, the average bitrate upper limit setting will be invalid, and encoding will be performed according to the CRF value.
      When the bitrate control mode is set to ABR or CBR, the CRF does not need to be set.
      Proportional Compression Bitrate
      Disabled (default).
      Enabled: The bitrate of the output video will be adjusted based on the input compression ratio.
      Compression Ratio
      It is used when Proportional Compression Bitrate is enabled. The compression ratio is an integer within the range of [0, 100].
      Recommended Settings
      Select the desired output video quality, such as Standard Definition (SD), and the preset video bitrate, resolution, and audio bitrate will be automatically populated for you.
      Note: different encoding standards have varying recommended parameters. For more details, refer to the Appendix.
      Average Bitrate
      The following two modes are supported:
      No video bitrate limit is set.
      Custom: It is customized within the range of [128, 35000] (in Kbps).
      Resolution
      The following three modes are supported:
      Keep the original: The resolution is consistent with that of the source video.
      Scale: The image is scaled proportionally according to the long or short side (width or height), with a size range of [128, 4096] (in px).
      Custom: Both the long and short sides (width and height) can be scaled in custom proportion, with a size range of [128, 4096] (in px).
      Display Aspect Ratio (SAR)
      It is used when the resolution is set to Custom and the aspect ratio of the video differs from that of the source video. The sample aspect ratio (SAR) refers to the pixel aspect ratio of the video and is used to specify the shape of pixels. The following three modes are supported:
      Keep the origin (default)
      1 : 1
      2 : 1
      Padding Rules
      It is used when the resolution is set to Custom and the aspect ratio of the video differs from that of the source video. The following five modes are supported:
      Scale to fill: This will scale the video image to fill the entire display area, which may cause distortion.
      Black bars: (default) Black bars are added around the video to maintain the original aspect ratio, which may waste some display space.
      White bars: It is similar to the mode of black bars, but white bars are added on the top and bottom/left and right sides of the video.
      Gaussian Blur: Applies a Gaussian Blur effect to the stretched or filled areas to reduce visual discomfort.
      Intelligent cropping: The video image to be retained is intelligently selected at the time of video cropping.
      
      Frame Rate
      
      The following two video frame rate setting modes are supported:
      Keep the original: The frame rate is consistent with that of the source video.
      Custom: The frame rate is customized within the range of [1, 120] (in FPS). If the set value exceeds the source frame rate, duplicate frames will be inserted to make up for it.
      
      GOP
      
      Same Origin of GOP Structure
      Disabled (default).
      Enabled: The GOP is consistent with that of the source file. Once it is enabled, no other GOP parameters need to be set.
      GOP Length
      The following two modes are supported:
      Automatic
      Custom: Enter an integer number of frames or duration (in seconds).
      Adaptive I-Frame Decision
      Disabled (default).
      Enabled: MPS will automatically identify transition points between different scenarios in the video and adaptively insert keyframes (I-frames) at these points, thereby improving the video's random accessibility and encoding efficiency.
      Max. Number of Consecutive B Frames
      Supported options: Automatic, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and 16.
      When the encoding standard is set to H.264 or H.265, it is recommended to select [Automatic] so that MPS can select the optimal number of B frames.
      GOP Duration at Startup
      Disabled (default).
      Enabled: It is used to set the GOP duration of the video at startup (in seconds).
      GOP Quantity at Startup
      It is used when GOP Duration at Startup is enabled.
      It is used to set the first x GOPs of the video to take effect at startup, where x is input by the user.
      
      More
      
      Encoder Level
      The default value is Automatic.
      If H.264 is selected as the encoding standard, the following options are supported: Automatic, 1, 1.1, 1.2, 1.3, 2, 2.1, 2.2, 3, 3.1, 3.2, 4, 4.1, 4.2, 5, and 5.1.
      If H.265 is selected as the encoding standard, the following options are supported: Automatic, 1, 2, 2.1, 3, 3.1, 4, 4.1, 5, 5.1, 5.2, 6, 6.1, 6.2, and 8.5.
      If H.266, MV-HEVC, or AV1 is selected as the encoding standard, this option is not available.
      profile
      This configuration item is available only when H.264 is selected as the encoding standard. Different profiles are suitable for different scenarios.
      Auto(default): Automatically select the most suitable profile.
      Baseline: Supports only I/P frames and non-interlaced scenarios, suitable for video calls and mobile videos.
      Main: The mainstream profile, providing I-frames, P-frames, and B-frames. It supports both non-interlaced and interlaced modes, mainly used in mainstream audio and video consumer products like video players and streaming media transmission devices.
      High: The highest encoding level, adding 8x8 prediction to Main Profile and supporting customized quantization, widely used in Blu-ray storage and high-definition television.
      Bit
      8 (default) and 10
      Keep Original Timestamp
      Disabled (default)
      Enabled
      
      Audio Parameters
      
      Audio Transcoding
      Enabled: Audio transcoding parameters can be set.
      Disabled: The original audio is used.
      Encoding standard
      When the container format is MP4, the corresponding encoding standards are AAC and MP3.
      When the container format is FLV, the corresponding encoding standard is AAC.
      When the container format is HLS, the corresponding encoding standard is AAC.
      When the container format is MXF, the corresponding encoding standards are PCM16 and PCM24.
      When the container format is MOV, the corresponding encoding standards are AAC and MP3.
      When the container format is TS, the corresponding encoding standards are AAC and MP3.
      When the container format is WEBM, the corresponding encoding standard is Opus.
      When the container format is MKV, the corresponding encoding standards are AAC and Opus.
      Sample rate
      7350, 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000, 64000, 88200, 96000, in Hz.
      Bitrate
      The following two modes are supported:
      Keep the original
      Custom: It is customized within the range of [26, 256] (in Kbps).
      Channel
      Mono-channel, Dual-channel, Multichannel.

      2. TSC Transcoding

      MPS provides preset TSC templates, which can be used directly. You can also click Create template to customize your own TSC templates.
      

      Table of Detailed Configuration Item Description

      Item
      Description
      Template name
      Max 64 characters; supports Chinese characters, letters, digits, underscores (_), hyphens (-), and periods.
      Container format
      MP4, FLV, HLS, MXF, MOV, TS, WEBM, and MKV.
      Configuration Item
      Video parameters (required) and audio parameters (optional).
      Segmentation Rules
      Multipart Format
      Segmentation rules can be configured when the container format is HLS.
      Data Sharding
      Average Segmentation Duration
      Segment Duration at Startup
      Number of Effected Segments
      Video Parameters
      Encoding standard
      H.264, H.264 intra, H.265, AV1, H.266, MV-HEVC, MPEG2, VP8, and VP9.
      
      Intelligent
      Scenario Configuration
      Disabled (default)
      Enabled: Video scenarios and transcoding strategies applicable for the template parameter can be selected. MPS will intelligently adjust underlying processing parameters based on the selected scenarios and strategies to achieve better transcoding effects for different scenario characteristics.
      Applicable video scenarios
      MPS provides several preset video scenarios, with different processing modes configured to adapt to different scenario characteristics:
      General Transcoding Scenarios: General transcoding compression scenarios.
      PGC High-Definition Movie and TV Drama: The focus is on the viewing experience of movies and TV dramas at the time of compression. ROI encoding is applied based on the characteristics of movies and TV dramas, while high-quality video and audio contents are retained.
      High-Definition Material: This scenario involves material resource categories with extremely high requirements for picture quality and includes many transparent picture elements. The compression achieves almost visually lossless quality.
      User-Generated Content (UGC): It is suitable for a wide range of UGC/short video scenarios. It optimizes the encoding bitrate and image quality based on the characteristics of short videos and improves business QoS/QoE metrics.
      Showroom/e-commerce category: Emphasizes detail clarity and ROI area enhancement during compression, with particular attention to maintaining image quality in facial areas.
      Education Category: The emphasis is on the clarity and readability of text and images at the time of compression to help students better comprehend the content, ensuring the clear conveyance of instructional material.
      Transcoding strategy
      TSC transcoding supports the Standard Compression and Extreme Compression strategies. Different strategies have different underlying transcoding models, which will affect the bitrate, image quality, and other results.
      Standard Compression: Standard TSC transcoding, which provides three options:
      Low Compression - Image quality preferred
      Medium Compression - Comprehensive optimization
      High Compression - Bitrate preferred
      From top to bottom, the higher the compression level, the smaller the output video file size, and the greater the image quality loss. Using any option of this strategy only incurs TSC transcoding fees.
      Extreme Compression: An "upgraded version" of standard compression, with the highest compression level, which maximizes the compression bitrate while ensuring a certain level of image quality, significantly saving bandwidth and storage costs. Using this strategy incurs both TSC transcoding and audio/video enhancement - artifacts removal fees. For details, see Billing Description.
      Note:
      If the output video is intended for viewing on a TV, it is not recommended to use the extreme compression strategy.
      Resolution & Bitrate
      Bitrate Control Mode
      CRF Value
      Proportional Compression Bitrate
      Compression Ratio
      Recommended Settings
      Average Bitrate
      Resolution
      Display Aspect Ratio (SAR)
      Padding Rules
      Frame Rate
      GOP
      Same Origin of GOP Structure
      GOP Length
      Adaptive I-Frame Decision
      Max. Number of Consecutive B Frames
      GOP Duration at Startup
      GOP Quantity at Startup
      More
      Encoder Level
      profile
      Bit
      Keep Original Timestamp
      Audio Parameters
      Audio Transcoding
      Encoding standard
      Sample rate
      Bitrate
      Channel

      3. Video Adaptive Bitrate Streaming Template

      MPS provides preset Video Adaptive Bitrate Streaming Templates, which can be used directly. You can also click Create template to customize your own Video Adaptive Bitrate Streaming Templates.
      

      Table of Detailed Configuration Item Description

      Item
      Description
      Template Name
      Max 64 characters; supports Chinese characters, letters, digits, underscores (_), hyphens (-), and periods.
      Template Description
      Max 256 characters; supports Chinese characters, letters, digits, underscores (_), hyphens (-), and periods.
      Packaging Format
      HLS, MPEG-DASH.
      Multipart Format
      (HLS Packaging Options)
      MP4, MP4+Packed Audio, TS, TS+Packed Audio.
      Data sharding (HLS Packaging Options)
      Segment File (segment), Single File (single-file).
      Resolution
      Disallow low resolution video to high resolution conversion
      Allow low resolution video to high resolution conversion: Transcoding a low-resolution original video to high resolution does not directly enhance the image quality. If you desire to improve the quality effect of the video, you can use the Audio and Video Enhancement feature.
      Substream Information
      Transcoding Type
      You can select a transcoding type for each substream, supporting General transcoding or TSC transcoding.
      Video Parameters
      Encoding standard
      H.264, H.265, AV1 ,MV-HEVC.
      Intelligent Scenario Configuration
      If the substream transcoding type is TSC transcoding, this configuration is supported.
      For configuration instructions, see the section TSC Transcoding - Table of Detailed Configuration Item Description above.
      Applicable video scenarios
      Transcoding policy
      Bitrate & Resolution
      Frame Rate
      Note:
      The frame rate configuration of each substream must be consistent.
      GOP
      Note:
      The GOP configuration of each substream must be consistent.
      More
      Segmentation Rules
      Segmentation rules can be configured when the container format is HLS.
      Note:
      The segmentation rules for each substream are consistent by default. If needed, you can click "Configure Different Rules" to set distinct average segment durations and initial segment lengths for substreams.
      
      
      
      Audio Parameters

      4. Remuxing Template

      The system provides remuxing templates, which can be used directly. Currently, the system provides templates for transcoding to MP4 and HLS formats, with no support for custom remuxing templates.

      System Preset Remuxing Template List

      Template Name
      Template ID
      Container Format
      Transformat-MP4
      9
      MP4
      Transformat-HLS
      6
      HLS

      Appendix:Recommended Settings

      To accommodate varying requirements for video clarity, it is recommended that you configure the video bitrate, resolution, and audio bitrate according to the following suggested parameters. Please note:
      The recommended settings vary across different encoding standards. For instance, the suggested video bitrate under the H.265 encoding standard is generally 60% of that recommended for the H.264 encoding standard.
      Compared to standard video transcoding, ultra-high-definition rapid transcoding recommends a lower video bitrate configuration.
      Encoding standards
      Recommended settings level
      Resolution setting
      General Transcoding
      TSC Transcoding
      Audio bitrate setting (Kbps)
      Video bitrate setting (Kbps)
      H.264
      H.264intra
      VP9
      SD
      (Long side) Proportionally scaled * (Short side) 480
      1200
      720
      64
      HD
      (Long side) Proportionally scaled * (Short side) 720
      2500
      1500
      96
      FHD
      (Long side) Proportionally scaled * (Short side) 1080
      6000
      3600
      2K
      (Long side) Proportionally scaled * (Short side) 1440
      8000
      4800
      128
      4K
      (Long side) Proportionally scaled * (Short side) 2160
      20000
      12000
      H.265
      SD
      (Long side) Proportionally scaled * (Short side) 480
      720
      432
      64
      HD
      (Long side) Proportionally scaled * (Short side) 720
      1500
      900
      96
      FHD
      (Long side) Proportionally scaled * (Short side) 1080
      3600
      2160
      2K
      (Long side) Proportionally scaled * (Short side) 1440
      4800
      2880
      128
      4K
      (Long side) Proportionally scaled * (Short side) 2160
      12000
      7200
      AV1
      SD
      (Long side) Proportionally scaled * (Short side) 480
      540
      324
      64
      HD
      (Long side) Proportionally scaled * (Short side) 720
      1125
      675
      96
      FHD
      (Long side) Proportionally scaled * (Short side) 1080
      2700
      1620
      2K
      (Long side) Proportionally scaled * (Short side) 1440
      3600
      2160
      128
      4K
      (Long side) Proportionally scaled * (Short side) 2160
      9000
      5400
      H.266
      SD
      (Long side) Proportionally scaled * (Short side) 480
      420
      252
      64
      HD
      (Long side) Proportionally scaled * (Short side) 720
      875
      525
      96
      FHD
      (Long side) Proportionally scaled * (Short side) 1080
      2100
      1260
      2K
      (Long side) Proportionally scaled * (Short side) 1440
      2800
      1680
      128
      4K
      (Long side) Proportionally scaled * (Short side) 2160
      7000
      4200
      MV-HEVC
      FHD
      (Long side) Proportionally scaled * (Short side) 1080
      9000
      5400
      96
      2K
      (Long side) Proportionally scaled * (Short side) 1440
      12000
      7200
      128
      4K
      (Long side) Proportionally scaled * (Short side) 2160
      30000
      18000
      8K
      (Long side) Proportionally scaled * (Short side) 4320
      75000
      45000
      256
      MPEG2
      SD
      (Long side) Proportionally scaled * (Short side) 480
      1800
      1080
      64
      HD
      (Long side) Proportionally scaled * (Short side) 720
      3750
      2250
      96
      FHD
      (Long side) Proportionally scaled * (Short side) 1080
      9000
      5400
      2K
      (Long side) Proportionally scaled * (Short side) 1440
      12000
      7200
      128
      4K
      (Long side) Proportionally scaled * (Short side) 2160
      30000
      18000
      VP8
      SD
      (Long side) Proportionally scaled * (Short side) 480
      1560
      936
      64
      HD
      (Long side) Proportionally scaled * (Short side) 720
      3250
      1950
      96
      FHD
      (Long side) Proportionally scaled * (Short side) 1080
      7800
      4680
      2K
      (Long side) Proportionally scaled * (Short side) 1440
      10400
      6240
      128
      4K
      (Long side) Proportionally scaled * (Short side) 2160
      26000
      15600

      Audio Transcoding Templates

      1. General Audio Transcoding Template

      MPS provides preset General Audio Transcoding Templates, which can be used directly. You can also click Create template to customize your own General Audio Transcoding Templates.
      

      Table of Detailed Configuration Item Description

      Item
      Description
      Template Name
      Support Chinese characters, letters, digits, underscores, hyphens, and dots, with a length of up to 64 chars.
      Container Format
      MP3, FLAC, OGG, M4A.
      Audio Parameter Encoding Standard
      When the container format is MP3, the corresponding encoding standard is MP3.
      When the container formats are FLAC and OGG, the corresponding encoding standard is FLAC.
      When the container format is M4A, the corresponding encoding standards are MP3, AAC, and AC3.
      Sample Rate
      Multiple sample rates such as 32000Hz, 44100Hz, and 48000Hz are supported.
      Bitrate (Audio Bitrate)
      The audio bitrate can be the same as that of the source file or be customized within the range of [26, 256] (in Kbps).
      Sound Channel
      Mono-channel, Dual-channel.
      Templates created are displayed in the General Audio Transcoding Template list. You can view, edit, or delete custom templates, but preset templates can be viewed only, not edited or deleted.

      System Preset General Audio Transcoding Template List

      Template Name
      Template ID
      Format
      Bitrate
      Codec
      SoundSystem
      SampleRate
      Audio-M4A-24Kbps
      1100
      M4A
      24kbps
      AAC
      Stereo
      44100Hz
      Audio-M4A-48Kbps
      1110
      M4A
      48kbps
      AAC
      Stereo
      44100Hz
      Audio-M4A-96Kbps
      1120
      M4A
      96kbps
      AAC
      Stereo
      44100Hz
      Audio-M4A-192Kbps
      1130
      M4A
      192kbps
      AAC
      Stereo
      44100Hz
      Audio-M4A-256Kbps
      1140
      M4A
      256kbps
      AAC
      Stereo
      44100Hz
      Audio-MP3-128Kbps
      1010
      MP3
      128kbps
      MP3
      Stereo
      44100Hz
      Audio-MP3-320Kbps
      1020
      MP3
      320kbps
      MP3
      Stereo
      44100Hz

      2. TSC Audio Transcoding Template

      MPS provides preset TSC Audio Transcoding Templates, which can be used directly. You can also click Create template to customize your own TSC Audio Transcoding Templates.
      

      Table of Detailed Configuration Item Description

      Item
      Description
      Template Name
      Support Chinese characters, letters, digits, underscores, hyphens, and dots, with a length of up to 64 chars.
      Container Format
      M4A
      Audio Parameter Encoding Standard
      AAC
      Sample rate
      Multiple sample rates such as 32000Hz, 44100Hz, and 48000Hz are supported.
      Bitrate (Audio Bitrate)
      The audio bitrate can be the same as that of the source file or be customized within the range of [26, 256] (in Kbps).
      Sound Channel
      Mono-channel, Dual-channel, Multichannel.
      Templates created are displayed in the TSC Audio Transcoding Template list. You can view, edit, or delete custom templates, but preset templates can be viewed only, not edited or deleted.

      System Preset TSC Audio Transcoding Template List

      Template Name
      Template ID
      Container Format
      Audio Bitrate
      Codec
      SoundSystem
      Sample Rate
      TESHD-Audio-M4A-192Kbps
      100730
      M4A
      192kbps
      AAC
      Stereo
      44100Hz
      TESHD-Audio-M4A-256Kbps
      100740
      M4A
      256kbps
      AAC
      Stereo
      44100Hz

      3. Audio Adaptive Bitrate Streaming Template

      MPS provides preset Audio Adaptive Bitrate Streaming Templates, which can be used directly. You can also click Create template to customize your own Audio Adaptive Bitrate Streaming Templates.
      Item
      Description
      Template Name
      Support Chinese characters, letters, digits, underscores, hyphens, and dots, with a length of up to 64 chars.
      Template Description
      The length cannot exceed 256 characters.
      Packaging Format
      HLS, MPEG-DASH.
      Substream Information
      Template
      Substream parameters for General Audio Transcoding or TSC Audio Transcoding are selected.
      Encoding standard
      When the packaging format is HLS, the corresponding encoding standards are AAC and AC3.
      When the packaging format is MPEG-DASH, the corresponding encoding standards are AAC, MP3, FLAC, and AC3.
      Sample rate
      Multiple sample rates such as 32000Hz, 44100Hz, and 48000Hz are supported.
      Audio Bitrate
      The audio bitrate can be the same as that of the source file or be customized within the range of [26, 256] (in Kbps).
      Channel
      Mono-channel, Dual-channel, Multichannel.
      Templates created are displayed in the Audio Adaptive Bitrate Streaming Template list. You can view, edit, or delete custom templates, but preset templates can be viewed only, not edited or deleted.

      System Preset Template List

      Template Name
      Template ID
      Packaging Format
      Substreams
      Substream details
      Transcoding Type
      Audio Bitrate
      Codec
      SoundSystem
      Sample Rate
      Adaptive-PureAudio-HLS
      30
      HLS
      1
      Standard audio transcoding
      Same as source audio
      AAC
      Stereo
      44100Hz
      
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