Profils d'acquisition standard pour la diffusion dynamique et le codage sensible au contexte

Audio renditions

Segmented audio renditions

Notes

• ^[1-1] When you reference a rendition in an ingest profile, be sure to prefix the name with default/ - for example: default/audio128
• ^[1-2] A segment correlates to a downloadable file. For example, with HLS you might segmented the file every 6 seconds. Each segment contains enough information to allow it to be decoded and played independently of other segments. An HLS manifest will list each segment path and its duration.

  A fragment refers to fragments of an MP4 file. A non-fragmented MP4 contains metadata at the start or end of the file and requires that the data (FTYP, MOOV atoms) be decoded before the media (MDAT atom). To make streaming easier, an MP4 file can be fragmented so that the metadata and necessary for playback as well as the media are chunked into fragments within the file. This allows players to seek to specific chunks of media easily as well as allowing smooth transitions between different renditions. Fragmenting was initially created for DASH but is now also supported by HLS.

  You can also fragment and dash media such that a segment (file) can contain multiple fragments. It is common to make the segment and fragment duration the same. Note that duration and length refer to the same thing when discussing fragments and segments.

Progressive audio renditions

Notes

• ^[2-1] When you reference a rendition in an ingest profile, be sure to prefix the name with default/ - for example: default/audio128

Video renditions

Dynamic delivery video renditions

Notes

• ^[3-1] Width of output renditions depends on input source aspect ratio
• ^[3-2] When you reference a rendition in an ingest profile, be sure to prefix the name with default/ - for example: default/video2000

HEVC video renditions^[4-1]

Notes

• ^[4-1] HEVC support is a paid add-on. Contact your Account Manager if you are interested in HEVC support
• ^[4-2] Width is also included for 16:9 aspect ratios, but actual width of output renditions depends on input source aspect ratio
• ^[4-3] When you reference a rendition in an ingest profile, be sure to prefix the name with default/ - for example: default/video2000
• ^[4-4] In addition to those shown in the table, HEVC renditions have the following properties:
  • fixed_keyframe_interval: true
  • segment_seconds: 2
  • video_bframes: 3
  • video_codec_profile: main
  • video_reference_frames: 6

Progressive video renditions

Notes

• ^[5-0] In addition to the properties shown above, all progressive renditions have the following settings:
  • Aspect Mode: Preserve
  • Speed: 3
  • Video Codec: h264
  • Upscale: false
  • Audio Codec: aac
  • AAC Profile: aac-lc
• ^[5-1] Width of output renditions depends on input source aspect ratio
• ^[5-2] When you reference a rendition in an ingest profile, be sure to prefix the name with default/ - for example: default/progressive1200

If you require renditions with bit rates/resolutions other than those in the tables above, please Contact Brightcove Support.