User Guide

Job Limitations for Accelerated Transcoding in AWS Elemental MediaConvert

Before you enable accelerated transcoding, make sure that your job conforms to the following requirements and limitations.

Video Input Requirements

The following table shows the supported video input codecs and containers.

Container Video Codecs Supported with Container
IMF JPEG 2000 (J2K)
MPEG Transport Streams AVC (H.264), HEVC (H.265), MPEG-2, VC-1
MPEG-4 AVC Intra 50/100, AVC (H.264), HEVC (H.265), MPEG-2
MXF Apple ProRes, AVC Intra 50/100, AVC (H.264), JPEG 2000 (J2K), MPEG-2, SonyXDCam, SonyXDCam (as an MPEG-2 variant only)
QuickTime Apple ProRes, AVC Intra 50/100, AVC (H.264), JPEG 2000 (J2K), MPEG-2

Output Restrictions

  • Use only supported combinations of container and codec. The following table shows the supported video output codecs and containers.

    Container Codecs Supported with Container
    CMAF AVC (H.264), HEVC (H.265)
    DASH AVC (H.264), HEVC (H.265)
    HLS AVC (H.264), HEVC (H.265)
    MPEG-2 TS AVC (H.264), HEVC (H.265), MPEG-2
    MPEG-4 (.mp4) AVC (H.264), HEVC (H.265)
    MPEG-4 Flash (.f4v) AVC (H.264)
    MXF (.mxf) MPEG-2
    QuickTime AVC (H.264), MPEG-2
    Smooth (ISMV) AVC (H.264)
    Raw (no container) AVC (H.264), HEVC (H.265), MPEG-2


    For MPEG-2 TS outputs, to use accelerated transcoding, you must change the default value of CBR for Transport stream settings > Rate mode to VBR.

  • Use only supported output captions formats. For accelerated transcoding, MediaConvert doesn’t support the following output captions formats:

    • Not supported: Burn-in

    • Not supported: SCTE-20

    For a list of supported captions formats, see Captions Support Tables by Output Container Type.

Transcoding Features Not Supported with Accelerated Transcoding

  • Avail blanking

  • Motion image inserter (Motion graphic overlay)

  • Interpolated frame rate conversion

  • VBI passthrough

  • Timecode passthrough

  • SEI timecode

  • Timecode anchor

  • Telecine output

  • Inverse telecine output

  • Open GOP outputs

  • Embedded timecode source


    With accelerated transcoding, you can set the input setting Timecode source to Embedded, but not the job-wide setting Source under Timecode configuration.

  • Values for Min-I interval other than the default of 0

  • ESAM

  • SCTE-35 passthrough