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Encoding Profile Settings

Notice

This document is a machine-translated draft and is currently undergoing review. Some content may be inaccurate or differ from the original Korean version. For the most precise information, refer to the Korean documentation.

  • PlanStarterBasicEnterprise

※ Availability varies by plan. Unless otherwise noted, all plans support this feature.

What is an encoding profile?​

An encoding profile is a set of configuration values used for transcoding tasks. Original files uploaded to Kollus VOD are automatically converted into formats optimized for various viewing environments, based on the resolution, bitrate, audio settings, and other parameters defined in the encoding profile.

Why is transcoding necessary?​

To play a single video file seamlessly across various devices (PC, mobile, tablet, etc.) and network conditions, multiple quality versions optimized for each environment must be created. This process is called transcoding, which involves decoding the original file and then re-compressing(Encoding) it with settings suited to the viewing environment.

With proper profile settings, you can build an adaptive bitrate streaming environment where video quality automatically adjusts according to network speed, minimizing buffering.

List of supported encoding profiles​

This is the full list of encoding profiles provided by Kollus VOD. Check whether each is supported based on your workspace plan.

Audio profile​

CodecQualityBitrateSample rateSupported plan
MP3Normal192 Kbps44.1 kHzEnterprise

Video profile​

For detailed descriptions of each property, refer to the Edit an Encoding profile section.

DeviceCodecAspect ratioQualityResolutionBitrateFrame rateSupported plan
TVH.264/MPEG-4 AVC16:9HD1920×10806 Mbps60 fpsBasic Enterprise
TVH.264/MPEG-4 AVC16:9High1280×7202.7 Mbps30 fpsEnterprise
TVH.264/MPEG-4 AVC16:9Normal960×5401.2 Mbps30 fpsEnterprise
PCH.264/MPEG-4 AVC16:9HD1280×7202 Mbps30 fpsStarter Basic Enterprise
PCH.264/MPEG-4 AVC16:9High960×5401.5 Mbps30 fpsEnterprise
PCH.264/MPEG-4 AVC16:9Normal640×360800 Kbps30 fpsEnterprise
PCH.264/MPEG-4 AVC4:3HD1280×9602 Mbps30 fpsEnterprise
PCH.264/MPEG-4 AVC4:3High960×7201.5 Mbps30 fpsEnterprise
PCH.264/MPEG-4 AVC4:3Normal640×480800 Kbps30 fpsEnterprise
TABLETH.264/MPEG-4 AVC16:9HD960×5401.5 Mbps30 fpsEnterprise
TABLETH.264/MPEG-4 AVC16:9High1920×10801.2 Mbps30 fpsEnterprise
TABLETH.264/MPEG-4 AVC16:9Normal428×240600 Kbps30 fpsEnterprise
TABLETH.264/MPEG-4 AVC16:10HD1152×7201.5 Mbps30 fpsEnterprise
TABLETH.264/MPEG-4 AVC16:10High864×540800 Kbps30 fpsEnterprise
TABLETH.264/MPEG-4 AVC16:10Normal576×360600 Kbps30 fpsEnterprise
TABLETH.264/MPEG-4 AVC4:3HD960×7201.5 Mbps30 fpsEnterprise
TABLETH.264/MPEG-4 AVC4:3High720×540800 Kbps30 fpsEnterprise
TABLETH.264/MPEG-4 AVC4:3Normal480×360600 Kbps30 fpsEnterprise
MOBILEH.264/MPEG-4 AVC4:3HD720×5401 Mbps30 fpsEnterprise
MOBILEH.264/MPEG-4 AVC4:3Normal480×360600 Kbps24 fpsEnterprise
MOBILEH.264/MPEG-4 AVC4:3Low240×180300 Kbps15 fpsEnterprise
MOBILEH.264/MPEG-4 AVC16:9HD960×5401 Mbps30 fpsEnterprise
MOBILEH.264/MPEG-4 AVC16:9Normal480×270600 Kbps24 fpsEnterprise
MOBILEH.264/MPEG-4 AVC16:9Low240×136300 Kbps24 fpsEnterprise

These are recommended values considering typical internet streaming environments for customers.

PropertyRecommended value
File formatMP4
CodecH.264/MPEG-4 AVC
ProfileMain@L3.0
Bitrate
  • PC: 1.5–2.5 Mbps
  • MOBILE: 1.0–1.5 Mbps
Frame rate30 fps
Video size
  • PC: 1280×720–1920×1080
  • MOBILE: 960×540–1280×720
Audio codecAAC

View encoding profiles​

View the list of encoding profiles from the [Settings] > [Encoding profile] menu in the Kollus VOD console.

The main configuration items of each encoding profile are as follows.

ItemDescription
Profile group (①)The group name classified based on the playback device type and aspect ratio.
Profile name (②)A name automatically generated by combining the playback device, aspect ratio, and quality information.
Profile key (③)A unique identifier for the profile. It is used as a reference value for FTP passthrough uploads or category linking.
Profile group classification

Profile group classification​

Group nameDevice and aspect ratio
Audio-
TV-
PC1PC 16:9
PC2PC 4:3
PC3PC 21:9
TABLET1TABLET 16:9
TABLET2TABLET 4:3
TABLET3TABLET 16:10
MOBILE1MOBILE 16:9
MOBILE2MOBILE 4:3

Add a new encoding profile​

  • PlanEnterprise
Permissions and restrictions
  • Permission guide: Only super administrator and administrator level users of a workspace using the Enterprise plan can add encoding profiles.
  • Not applied retroactively: Newly added encoding profiles apply only to content uploaded after the configuration is completed.

Add a new encoding profile when you need a specific resolution or bitrate setting in addition to the default profiles.

  1. Go to the [Settings] > [Encoding profile] menu in the Kollus VOD console.
  2. Click [Add profile] in the upper right corner of the screen.
  3. Click [Add (+)] to the right of the profile item you want to add. For detailed descriptions of each property, refer to the Edit an Encoding profile section.
  4. After the setup is complete, the encoding profile is automatically applied and transcoded for newly uploaded videos.

Edit an Encoding profile​

  • PlanEnterprise
Permissions and restrictions
  • Permission guide: Only super administrator and administrator level users of a workspace using the Enterprise plan can edit encoding profiles.
  • Items that cannot be edited: The profile key is a unique identifier and cannot be changed.
  • Not applied retroactively: Changes are not applied retroactively to existing content that has already completed transcoding before the setting was modified. For stable operation, it is recommended to add a new profile rather than editing an existing one.

Edit the properties of an existing encoding profile. For recommended values for each property, refer to Recommended settings for video content.

  1. Go to the [Settings] > [Encoding profile] menu in the Kollus VOD console.
  2. Click the edit icon to the right of the profile item you want to edit.
  3. Edit the detailed properties. Refer to the table below for a description of each item.

Common settings​

ItemDescription
Profile nameThe name used to identify the profile. (Up to 50 characters including spaces; emoji not allowed)
File formatThe container format of the content to be used in the service. You can select MP4 for video and MP3 for audio.
Bitrate modeThe processing method for the amount of data transmitted per second (bitrate).
  • Constant bitrate(CBR): Encodes at a fixed bitrate to maintain consistent quality.
  • Variable bitrate(VBR): Adjusts the bitrate according to the video's complexity to increase efficiency.

Video settings​

ItemDescription
CodecThe video compression format.
  • H.264/MPEG-4 AVC: The most universally compatible standard codec
  • MPEG-4 Video(MP4V): An older-generation video codec
ProfileDefines the compression level and technical specifications of the video codec.
  • When codec H.264/MPEG-4 AVC is selected
    • Baseline@L1.3 Mobile
    • Baseline@L3.0
    • Main@L3.0
    • High@L3.0
    • High@L4.1
    • High@L5.1
  • When codec MPEG-4 Video(MP4V) is selected
    • No selectable items
Bitrate(Kbps)The amount of data processed per second. (0–100,000 Kbps)
Frame rate(fps)The number of frames displayed per second. (10–60 fps)
Video sizeAfter selecting the aspect ratio, enter the width value and the height value will be calculated automatically. (Custom settings available)

Audio settings​

ItemDescription
Audio codecThe audio compression format. AAC offers better sound quality and compression efficiency than MP3, but some devices may not support AAC.
  • AAC: A standard codec that provides better sound quality and higher compression efficiency than MP3.
  • MP3: A codec with high compatibility but relatively lower compression efficiency.
Bitrate(Kbps)The amount of data processed per second. (48–320 Kbps)
Sample rate(Hz)The number of samples per second used to convert analog audio signals into digital signals. (11025, 22050, 44100, 48000 Hz)
Use additional profileEnabling this option allows you to link the profile to a specific category for automatic transcoding, or to perform additional transcoding on individual content.
Additional transcoding restrictions

The additional transcoding feature can only be applied to content with saved original files. It applies only to new files uploaded after the setting is completed in the [Settings] > [Save original files] menu of the Kollus VOD console.

Category-profile auto linking​

  • PlanEnterprise
Permissions and restrictions
  • Permission guide: Only super administrator and administrator level users of a workspace using the Enterprise plan can configure this.
  • Not applied retroactively: Applies only to content newly uploaded after the configuration is completed.

Automatically applies a pre-designated encoding profile to content uploaded to a specific category.

  1. Referring to the Edit an Encoding profile section, enable the [Use additional profile] option for the target profile.
  2. Click [Add (+)], which appears below the profile item.
  3. Select the category to link, then click [Select this category].
  4. Once the setup is complete, all videos uploaded to that category are automatically converted using the default profile together with the linked additional profile.

Disable an encoding profile​

Change the active status of each profile using the toggle switch in the [Settings] > [Encoding profile] menu of the Kollus VOD console.

To ensure normal content upload and transcoding processing by the system, at least one encoding profile must always remain active.