Release notes

This page documents production updates to the Transcoder API. Check this page for announcements about new or updated features, bug fixes, known issues, and deprecated functionality.

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September 30, 2021

v1

Transcoder API is GA: The Transcoder API has graduated out of beta and has reached v1. All API endpoints are updated to use https://transcoder.googleapis.com/v1/.

Added Troubleshooting guide.

August 31, 2021

v1

All client library code samples updated to v1 of the API.

Delete operations for jobs and job templates now return a 404 resource not found error if the specified resource name does not exist. Previously, these delete operations failed silently in this case. To enable the previous behavior, set the allowMissing query parameter to true when sending a request to delete a job or job template.

Encryption support (and its associated documentation) is temporarily unavailable.

August 02, 2021

v1

Added new quotas in order to group requests into 3 buckets: mutation, get, and list. More information can be found at Quotas and limits.

July 13, 2021

v1beta1 & v1

Transcoder v1 API is now available. See the migration guide for information on how to update your job templates to the new version.

The Transcoder v1beta1 API is deprecated and will be turned down. It is replaced by the Transcoder v1 API.

The API outputs CEA-608 captions instead of CEA-708.

March 31, 2021

v1beta1

Beta stage support for VPC Service Controls.

February 26, 2021

v1beta1

Sprite sheets now support different image compression levels with the new quality setting.

Sprite sheets now preserve the source aspect ratio. Set the sprite width or height field, but not both (the API will automatically calculate the missing field).

The API now supports video padding with black.

November 16, 2020

v1beta1

Added Shaka player compatibility for Dash and HLS CEA608/CEA708. Shaka player version 3.0 is used for validation testing.

The Transcoder API preserves the aspect ratio of the source video.

The Transcoder API supports cropping.

Improved performance for short input files.

Client libraries released.

The Transcoder API supports overlays.

The Cloud SDK now supports the Transcoder API.

Content encryption is supported for the following containers:

Type Technology Format Video Codecs Audio Codecs
H.264 H.265 AAC
DRM FairPlay HLS TS (SAMPLE-AES) fMP4 (SAMPLE-AES) TS (SAMPLE-AES)
fMP4 (SAMPLE-AES) fMP4 (SAMPLE-AES)
DRM Widevine, PlayReady DASH fMP4 (MPEG-CENC) fMP4 (MPEG-CENC)
DRM Widevine, PlayReady HLS fMP4 (MPEG-CENC) fMP4 (MPEG-CENC)
Content protection AES-128 HLS, DASH fMP4, TS (AES-128) fMP4, TS (AES-128) fMP4, TS (AES-128)

July 22, 2020

The Transcoder API provides output video using the VP9 codec.

The Transcoder API provides output subtitles using the WebVTT container.

The Transcoder API supports the following encryption standards for audio and video outputs:

  • AES-128 and SAMPLE-AES for TS
  • MPEG Common Encryption (MPEG-CENC) for fmp4

June 12, 2020

The Transcoder API provides output video using the H.265 codec.

The cumulative size of input files was limited to 150 GB per job. This size has been increased to 400 GB per job.

April 15, 2020

Private beta release: The Transcoder API converts video files into formats suitable for consumer distribution.

The Transcoder API provides output video using the H.264 codec.

The Transcoder API supports the following audio coding standards for audio output:

  • Dolby Digital audio codec (AC-3)
  • Dolby Digital plus, also known as enhanced AC-3 (E-AC-3)
  • Advanced audio coding high-efficiency (AAC-HE)
  • Advanced audio coding low-complexity (AAC-LC)

The Transcoder API supports the following output container formats:

  • MPEG-4 (MP4)
  • Dynamic adaptive streaming over HTTP (DASH, also known as MPEG-DASH), comprising of a manifest and fMP4 files
  • HTTP Live Streaming (HLS), comprising of manifests and media files
  • MPEG transport stream

The Transcoder API supports the following additional advanced capabilities:

  • Reusable job templates for managing job configurations
  • Caption mapping
  • Edit lists
  • Manifest naming and stream control
  • Priority queues
  • Ad-break and SCTE-35 insertion in streams and manifests
  • Flexible multiplexing and reusable elementary streams
  • Customizable H.264 codec parameters
  • Audio normalization during preprocessing
  • Sprite sheet generation, for previews and thumbnails
  • Pub/Sub notifications

The cumulative size of input files is limited to 150 GB per job.

VPC Service Controls is not supported. If your Google Cloud project uses VPC Service Controls, you can't set up a service perimeter around the Transcoder API.

The default preset/web-hd preset assumes every input file has at least one audio and one video track. If the input doesn't include either audio or video, the job fails.

Output is limited to a maximum frame rate of 120 fps and resolution of 3840 x 2160.