Recommended upload encoding settings

Video resolution & aspect ratios

Youmaker displays videos with different aspect ratios based on the platform and video format. The Youmaker video player automatically adapts to the size of each individual video.

How your video will display

The standard aspect ratio for Youmaker on a computer is 16:9. If your video has a different aspect ratio, the player will automatically change to the ideal size to match your video and the viewer’s device. 

 


Supported Youmaker file formats

Note: Audio files, like MP3, WAV, or PCM files, can’t be uploaded to Youmaker. You can use video editing software to convert your audio file to a video.

If you're not sure which format to save your video as or are getting an "invalid file format" error message when you're uploading, make sure that you’re using one of the following formats:

  • MOV
  • MP4
  • 3GPP
  • WebM

Recommended upload encoding settings

Below are recommended upload encoding settings for your videos on Youmaker

Container: MP4 

Audio codec: AAC-LC

  • Channels: Stereo or Stereo + 5.1
  • Sample rate 96khz or 48khz

Video codec: H.264

  • Progressive scan (no interlacing)
  • High Profile
  • 2 consecutive B frames
  • Closed GOP. GOP of half the frame rate.
  • CABAC
  • Variable bitrate. No bitrate limit required, though we offer recommended bit rates below for reference
  • Chroma subsampling: 4:2:0

Frame rate

Content should be encoded and uploaded in the same frame rate it was recorded.

Common frame rates include: 24, 25, 30, 48, 50, 60 frames per second (other frame rates are also acceptable).

Interlaced content should be deinterlaced before uploading. For example, 1080i60 content should be deinterlaced to 1080p30. 60 interlaced fields per second should be deinterlaced to 30 progressive frames per second.

Bitrate

The bitrates below are recommendations for uploads. Audio playback bitrate is not related to video resolution.

Recommended video bitrates for SDR uploads

To view new 4K uploads in 4K, use a browser or device that supports VP9.

Type

Video Bitrate, Standard Frame Rate

(24, 25, 30)

Video Bitrate, High Frame Rate

(48, 50, 60)

2160p (4K)

35–45 Mbps

53–68 Mbps

1440p (2K)

16 Mbps

24 Mbps

1080p

8 Mbps

12 Mbps

720p

5 Mbps

7.5 Mbps

480p

2.5 Mbps

4 Mbps

360p

1 Mbps

1.5 Mbps

 

Recommended audio bitrates for uploads

Type

Audio Bitrate

Mono

128 kbps

Stereo

384 kbps

5.1

512 kbps

 

Resolution and aspect ratio

The standard aspect ratio for Youmaker on a computer is 16:9. When uploading other aspect ratios such as vertical or square, the player automatically adapts itself to the size of the video. This setting gives the best viewing experience based on the aspect ratio and device.

 

Recommended color space for SDR uploads

Youmaker recommends BT.709 as the standard color space for SDR uploads:

 

Color Space

Color Transfer Characteristics (TRC)

Color Primaries

Color Matrix Coefficients

BT.709

BT.709 (H.273 value: 1)

BT.709 (H.273 value 1)

BT.709 (H.273 value 1)


Youmaker standardizes functionally similar color matrices and primaries before processing the video. For example, BT.601 and BT.709 TRC are identical, and Youmaker unifies them to BT.709. Or, BT.601 NTSC and PAL have functionally similar color matrices and Youmaker unifies them to BT.601 NTSC. In addition, Youmaker may take the following actions to interpret the color space values:

 

When

Youmaker Action

The upload color space has unspecified TRC.

Assumes BT.709 TRC.

The upload color space has unknown or unspecified color matrix and primaries.

Assumes BT.709 color matrix and primaries.

The upload color space mixes BT.601 and BT.709 color primaries and matrix with specified values.

Uses the color matrix to override the color primaries and make them consistent.

The upload color spaces mixes BT.601 and BT.709 color primaries and matrix, and either primaries or matrix is unspecified.

Uses the specified value of color primaries/matrix to set and override the unspecified one.

 

After the upload color space standardization, Youmaker checks if the color space matches BT.709 or BT.601, in which case the color space passes through. Otherwise, Youmaker converts the unsupported color spaces to BT.709 by mapping pixel values.

Note: Youmaker converts the color primaries that require high bit depth (which does not use a supported HDR transfer function) to avoid banding, such as BT.2020, to BT.709 (8-bit). Youmaker converts full color range to limited color range.

Warning: Youmaker does not recommend the RGB color matrix on uploads. In this case, Youmaker initially sets the color matrix to unspecified before the standardization. It will then infer the color matrix using the color primaries during standardization. Note that sRGB TRC will convert to BT.709 TRC. Youmaker re-tags the color primaries/matrix/TRC to BT.709 if it is not supported by Ffmpeg colorspace conversion filter.

 

 

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