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These are the specifications for all Mezzanine Asset delivery to Wurl: 

Video

Recommended

MP4 or MOV container

Mezzanine HD 1080p 10 Mbps, h.264, High profile, 4.1

Minimum required

MP4 or MOV container

HD 1080p, h.264, High profile, 4.1

Additional notes

  • No edit lists
  • Closed GOP, 1 second long
  • Chroma subsampling: 4:2:0

Depending on ingest method, large file sizes can cause difficulties with content delivery and result in ingestion delays. 

We cannot accept either of these formats

  • MXF
  • R3D (If mezzanine is desired)

Video files must not have drop frame timestamps

If you would like to deliver in a different format, please contact your onboarding manager.

Commercial Blacks/Bumpers/Bars and Tone

Minimum required

Remove all commercial blacks, bumpers, bars and tone, and production delivery slates from all assets.

Aspect Ratio (16:9)

Recommended

16:9, 1920x1080

Minimum required

16:9, 1920x1080

Additional notes

Wurl distributes to 16:9 aspect ratio players. Other aspect ratios will be processed and black bars will be added on the left/right (pillar boxes) or at the top/bottom (letter boxes) to make a 16:9 ratio on playout.

Video Frame Rate

Recommended

29.97 fps or 30 fps

Minimum required

23.98, 24, 25, 29.97, 30, 48, 50, 60 fps

Additional notes

  • Keep the framerate in the format in which it was recorded.
  • Wurl will deinterlace content by default, but it is recommended that content is deinterlaced prior to ingesting to Wurl so that you can control the quality.

Video Bitrate

Recommended

1080p at 10 Mbps (or higher)

Minimum required

1080p at 6 Mbps

Audio

Recommended

  • AAC, AAC-LC

Minimum Required

  • PCM 16-bit, AAC, AAC-LC

Audio Setting

Recommended

2-channel stereo

Minimum required

2-channel stereo

Audio Sample Rate

Recommended

48 Khz

Minimum required

44.1 Khz

Audio Bit Rate

Recommended

Stereo at 384 kbps

Minimum required

Stereo at 128 kbps

Audio Level

Recommended

  • All audio levels must be below 0 db.
  • Overall audio level should normalized to -24 db.

Minimum required

 

Captions

Recommended

SCC

Minimum required

SCC or SRT

Additional notes

  • Captions cannot be rollup.
  • Captions must be delivered 0-aligned to the video in order to properly sync with the audio.
  • Captions must not have drop-frame timestamps.
  • Captions must use UTF-8 encoding.
  • SCC captions only support English characters. SRT should be used to deliver captions with non-English characters.
  • HTML tags in CC are not supported in Wurl's system. 

 

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