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On-Demand Video and Audio Encoding Recommendations

Video quality recommendations for video files uploaded to EMMS for ABR encoding


The Endavo platform generally encodes all uploaded video files into 4 standard renditions to support adaptive bitrate (ABR) streaming to all Endavo devices, apps and players. We currently encode files to the following renditions (sizes) for ABR streaming: 1080p, 720p, 480p, 270p. It is important to note that the platform will only encode up to the highest quality of the original file (e.g., if 720p file is uploaded, we can only create 720p and lower renditions). We generally recommend uploading high definition (HD) 1080 p/i files with a minimum bitrate of 3200 kbps to accommodate successful video and audio encoding on the Endavo platform for optimal streaming quality. 

File bitrate also affects encoding, so we recommend the following minimum bitrates for video and audio encoding: 

  • 1080p - minimum 3200 kbps; optimal 3600 kbps
  • 720p - 2000 kbps
 Further video/audio specifications for advanced users: 

Format

 

Video bit-rate (Kbit/s)

 

Video Specification for H.264 encoding

 

Audio Specification for AAC-LC encoding

 

SD TV (digitized NTSC)
DVD 480i/p

1200

Frame rate: 29.97 fps
Frame size:
640x480 (4:3)
854x480 or 848x480 (16:9)

Bit-rate: 128 Kbit/s

Channels: 2 - Stereo

Sampling frequency: 44.1 or 48 KHz

Bits per sample:
16 or 24

SD TV (digitized PAL/SECAM) DVD 576i/p

1200

Frame rate: 25 fps
Frame size:
768x576 (4:3)
1024x576 (16:9)

HD TV - 720p

2000

Frame rate: 29.97/30 or 25 or 24/23.976 fps depending on the original frame rate

Full HD TV - 1080p/i

3600

Frame rate: 29.97/30 or 25 or 24/23.976 fps depending on the original frame rate

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