Video API, REST: Video.Transcode

Written by

Updated at May 28, 2026

HTTP request
Path parameters
Body parameters
VideoTranslationSettings
TranslationTrack
InputTrack
SubtitleTrack
AudioTrack
VideoSummarizationSettings
SummarizationTrack
InputTrack
VideoSpeechToTextSettings
SpeechToTextTrack
InputTrack
Response
Status

Initiates or updates video transcoding with specified parameters.
Can be used to start transcoding for videos with auto_transcode=DISABLE,
or to re-process a completed video with new transcoding settings.
Supports additional features like subtitle processing, translation, summarization, and speech-to-text.

HTTP request

POST https://video.api.cloud.yandex.net/video/v1/videos/{videoId}:transcode

Path parameters

Field

Description

videoId

string

Required field. ID of the video to transcode.

The maximum string length in characters is 50.

Body parameters

{
  "fieldMask": "string",
  "subtitleIds": [
    "string"
  ],
  "translationSettings": {
    "tracks": [
      {
        "inputTrack": {
          "trackIndex": "string",
          "srcLang": "string"
        },
        "subtitles": [
          {
            "dstLang": "string",
            "label": "string"
          }
        ],
        "audio": [
          {
            "dstLang": "string",
            "label": "string"
          }
        ]
      }
    ]
  },
  "summarizationSettings": {
    "tracks": [
      {
        "inputTrack": {
          "trackIndex": "string",
          "srcLang": "string"
        }
      }
    ],
    "processAllTracks": "boolean"
  },
  "speechToTextSettings": {
    "tracks": [
      {
        "inputTrack": {
          "trackIndex": "string",
          "srcLang": "string"
        }
      }
    ],
    "processAllTracks": "boolean"
  }
}

Field	Description
fieldMask	string (field-mask) Required field. A comma-separated names off ALL fields to be updated. Only the specified fields will be changed. The others will be left untouched. If the field is specified in `updateMask` and no value for that field was sent in the request, the field's value will be reset to the default. The default value for most fields is null or 0. If `updateMask` is not sent in the request, all fields' values will be updated. Fields specified in the request will be updated to provided values. The rest of the fields will be reset to the default.
subtitleIds[]	string IDs of manually uploaded subtitle files to include in the transcoding process. These subtitles will be embedded in the video output.
translationSettings	VideoTranslationSettings Settings for automatic translation of audio tracks. Defines source tracks and target languages for subtitle and audio translation.
summarizationSettings	VideoSummarizationSettings Settings for automatic video content summarization. Defines which audio tracks should be processed to generate text summaries.
speechToTextSettings	VideoSpeechToTextSettings Settings for automatic speech recognition (speech-to-text). Defines which audio tracks should be transcribed to generate text transcripts.

VideoTranslationSettings

Field

Description

tracks[]

TranslationTrack

Translation settings for each track.

TranslationTrack

Field	Description
inputTrack	InputTrack Required field. Input track settings.
subtitles[]	SubtitleTrack Settings for target subtitle tracks.
audio[]	AudioTrack Settings for target audio tracks.

InputTrack

Field

Description

trackIndex

string (int64)

Input audio track index (one-based).

The minimum value is 1.

srcLang

string

Source track language represented as a three-letter code according to ISO 639-2/T.
Track language will be deduced automatically if not provided.
In the latter case the deduction accuracy is not guaranteed.
For better performance please do specify the source track language when possible.

Value must match the regular expression |ara|deu|eng|fra|ita|jpn|kor|rus|spa|tur|zho.

SubtitleTrack

Field

Description

dstLang

string

Required field. Target language represented as a three-letter code according to ISO 639-2/T.

Value must match the regular expression ara|deu|eng|fra|ita|jpn|kaz|kor|rus|spa|tur|ukr|zho.

label

string

Required field. Track label to be displayed on the screen during video playback.

The maximum string length in characters is 50.

AudioTrack

Field

Description

dstLang

string

Required field. Target language represented as a three-letter code according to ISO 639-2/T.

Value must match the regular expression eng|kaz|rus.

label

string

Required field. Track label to be displayed on the screen during video playback.

The maximum string length in characters is 50.

VideoSummarizationSettings

Field

Description

tracks[]

SummarizationTrack

Summarization settings for each track.

processAllTracks

boolean

Summarize all available tracks.
If enabled, tracks parameter is ignored.
Enables automatic source language deduction for each track
and thus may lead to performance degradation.

SummarizationTrack

Field

Description

inputTrack

InputTrack

Required field. Input track settings.

InputTrack

Field

Description

trackIndex

string (int64)

Input audio track index (one-based).

The minimum value is 1.

srcLang

string

Source track language represented as a three-letter code according to ISO 639-2/T.
It will be deduced automatically if not provided.
In the latter case the deduction accuracy is not guaranteed.
For better performance please do specify the source track language when possible.

Value must match the regular expression |ara|deu|eng|fra|ita|jpn|kor|rus|spa|tur|zho.

VideoSpeechToTextSettings

Field

Description

tracks[]

SpeechToTextTrack

Speech-to-text settings for each track.

processAllTracks

boolean

Recognize speech from all available tracks.
If enabled, tracks parameter is ignored.
Enables automatic source language deduction for each track
and thus may lead to performance degradation.

SpeechToTextTrack

Field

Description

inputTrack

InputTrack

Required field. Input track settings.

InputTrack

Field

Description

trackIndex

string (int64)

Input audio track index (one-based).

The minimum value is 1.

srcLang

string

Value must match the regular expression |ara|deu|eng|fra|ita|jpn|kor|rus|spa|tur|zho.

Response

HTTP Code: 200 - OK

{
  "id": "string",
  "description": "string",
  "createdAt": "string",
  "createdBy": "string",
  "modifiedAt": "string",
  "done": "boolean",
  "metadata": "object",
  // Includes only one of the fields `error`, `response`
  "error": {
    "code": "integer",
    "message": "string",
    "details": [
      "object"
    ]
  },
  "response": "object"
  // end of the list of possible fields
}

An Operation resource. For more information, see Operation.

Field	Description
id	string ID of the operation.
description	string Description of the operation. 0-256 characters long.
createdAt	string (date-time) Creation timestamp. String in RFC3339 text format. The range of possible values is from `0001-01-01T00:00:00Z` to `9999-12-31T23:59:59.999999999Z`, i.e. from 0 to 9 digits for fractions of a second. To work with values in this field, use the APIs described in the Protocol Buffers reference. In some languages, built-in datetime utilities do not support nanosecond precision (9 digits).
createdBy	string ID of the user or service account who initiated the operation.
modifiedAt	string (date-time) The time when the Operation resource was last modified. String in RFC3339 text format. The range of possible values is from `0001-01-01T00:00:00Z` to `9999-12-31T23:59:59.999999999Z`, i.e. from 0 to 9 digits for fractions of a second. To work with values in this field, use the APIs described in the Protocol Buffers reference. In some languages, built-in datetime utilities do not support nanosecond precision (9 digits).
done	boolean If the value is `false`, it means the operation is still in progress. If `true`, the operation is completed, and either `error` or `response` is available.
metadata	object Service-specific metadata associated with the operation. It typically contains the ID of the target resource that the operation is performed on. Any method that returns a long-running operation should document the metadata type, if any.
error	Status The error result of the operation in case of failure or cancellation. Includes only one of the fields `error`, `response`. The operation result. If `done == false` and there was no failure detected, neither `error` nor `response` is set. If `done == false` and there was a failure detected, `error` is set. If `done == true`, exactly one of `error` or `response` is set.
response	object The normal response of the operation in case of success. If the original method returns no data on success, such as Delete, the response is google.protobuf.Empty. If the original method is the standard Create/Update, the response should be the target resource of the operation. Any method that returns a long-running operation should document the response type, if any. Includes only one of the fields `error`, `response`. The operation result. If `done == false` and there was no failure detected, neither `error` nor `response` is set. If `done == false` and there was a failure detected, `error` is set. If `done == true`, exactly one of `error` or `response` is set.

Status

The error result of the operation in case of failure or cancellation.

Field	Description
code	integer (int32) Error code. An enum value of google.rpc.Code.
message	string An error message.
details[]	object A list of messages that carry the error details.

Video API, REST: Video.Transcode

HTTP requestHTTP request

Path parametersPath parameters

Body parametersBody parameters

VideoTranslationSettingsVideoTranslationSettings

TranslationTrackTranslationTrack

InputTrackInputTrack

SubtitleTrackSubtitleTrack

AudioTrackAudioTrack

VideoSummarizationSettingsVideoSummarizationSettings

SummarizationTrackSummarizationTrack

InputTrackInputTrack

VideoSpeechToTextSettingsVideoSpeechToTextSettings

SpeechToTextTrackSpeechToTextTrack

InputTrackInputTrack

ResponseResponse

StatusStatus

Was the article helpful?

HTTP request

Path parameters

Body parameters

VideoTranslationSettings

TranslationTrack

InputTrack

SubtitleTrack

AudioTrack

VideoSummarizationSettings

SummarizationTrack

InputTrack

VideoSpeechToTextSettings

SpeechToTextTrack

InputTrack

Response

Status