Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+<h1><a href="videointelligence_v1.html">Cloud Video Intelligence API</a> . <a href="videointelligence_v1.videos.html">videos</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#annotate">annotate(body, x__xgafv=None)</a></code></p>
+<p class="firstline">Performs asynchronous video annotation. Progress and results can be</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="annotate">annotate(body, x__xgafv=None)</code>
+  <pre>Performs asynchronous video annotation. Progress and results can be
+retrieved through the `google.longrunning.Operations` interface.
+`Operation.metadata` contains `AnnotateVideoProgress` (progress).
+`Operation.response` contains `AnnotateVideoResponse` (results).
+
+Args:
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Video annotation request.
+    "videoContext": { # Video context and/or feature-specific parameters. # Additional video context and/or feature-specific parameters.
+      "shotChangeDetectionConfig": { # Config for SHOT_CHANGE_DETECTION. # Config for SHOT_CHANGE_DETECTION.
+        "model": "A String", # Model to use for shot change detection.
+            # Supported values: "builtin/stable" (the default if unset) and
+            # "builtin/latest".
+      },
+      "textDetectionConfig": { # Config for TEXT_DETECTION. # Config for TEXT_DETECTION.
+        "languageHints": [ # Language hint can be specified if the language to be detected is known a
+            # priori. It can increase the accuracy of the detection. Language hint must
+            # be language code in BCP-47 format.
+            #
+            # Automatic language detection is performed if no hint is provided.
+          "A String",
+        ],
+        "model": "A String", # Model to use for text detection.
+            # Supported values: "builtin/stable" (the default if unset) and
+            # "builtin/latest".
+      },
+      "speechTranscriptionConfig": { # Config for SPEECH_TRANSCRIPTION. # Config for SPEECH_TRANSCRIPTION.
+        "languageCode": "A String", # *Required* The language of the supplied audio as a
+            # [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt) language tag.
+            # Example: "en-US".
+            # See [Language Support](https://cloud.google.com/speech/docs/languages)
+            # for a list of the currently supported language codes.
+        "filterProfanity": True or False, # *Optional* If set to `true`, the server will attempt to filter out
+            # profanities, replacing all but the initial character in each filtered word
+            # with asterisks, e.g. "f***". If set to `false` or omitted, profanities
+            # won't be filtered out.
+        "enableAutomaticPunctuation": True or False, # *Optional* If 'true', adds punctuation to recognition result hypotheses.
+            # This feature is only available in select languages. Setting this for
+            # requests in other languages has no effect at all. The default 'false' value
+            # does not add punctuation to result hypotheses. NOTE: "This is currently
+            # offered as an experimental service, complimentary to all users. In the
+            # future this may be exclusively available as a premium feature."
+        "enableSpeakerDiarization": True or False, # *Optional* If 'true', enables speaker detection for each recognized word in
+            # the top alternative of the recognition result using a speaker_tag provided
+            # in the WordInfo.
+            # Note: When this is true, we send all the words from the beginning of the
+            # audio for the top alternative in every consecutive responses.
+            # This is done in order to improve our speaker tags as our models learn to
+            # identify the speakers in the conversation over time.
+        "maxAlternatives": 42, # *Optional* Maximum number of recognition hypotheses to be returned.
+            # Specifically, the maximum number of `SpeechRecognitionAlternative` messages
+            # within each `SpeechTranscription`. The server may return fewer than
+            # `max_alternatives`. Valid values are `0`-`30`. A value of `0` or `1` will
+            # return a maximum of one. If omitted, will return a maximum of one.
+        "audioTracks": [ # *Optional* For file formats, such as MXF or MKV, supporting multiple audio
+            # tracks, specify up to two tracks. Default: track 0.
+          42,
+        ],
+        "diarizationSpeakerCount": 42, # *Optional*
+            # If set, specifies the estimated number of speakers in the conversation.
+            # If not set, defaults to '2'.
+            # Ignored unless enable_speaker_diarization is set to true.
+        "enableWordConfidence": True or False, # *Optional* If `true`, the top result includes a list of words and the
+            # confidence for those words. If `false`, no word-level confidence
+            # information is returned. The default is `false`.
+        "speechContexts": [ # *Optional* A means to provide context to assist the speech recognition.
+          { # Provides "hints" to the speech recognizer to favor specific words and phrases
+              # in the results.
+            "phrases": [ # *Optional* A list of strings containing words and phrases "hints" so that
+                # the speech recognition is more likely to recognize them. This can be used
+                # to improve the accuracy for specific words and phrases, for example, if
+                # specific commands are typically spoken by the user. This can also be used
+                # to add additional words to the vocabulary of the recognizer. See
+                # [usage limits](https://cloud.google.com/speech/limits#content).
+              "A String",
+            ],
+          },
+        ],
+      },
+      "segments": [ # Video segments to annotate. The segments may overlap and are not required
+          # to be contiguous or span the whole video. If unspecified, each video is
+          # treated as a single segment.
+        { # Video segment.
+          "endTimeOffset": "A String", # Time-offset, relative to the beginning of the video,
+              # corresponding to the end of the segment (inclusive).
+          "startTimeOffset": "A String", # Time-offset, relative to the beginning of the video,
+              # corresponding to the start of the segment (inclusive).
+        },
+      ],
+      "labelDetectionConfig": { # Config for LABEL_DETECTION. # Config for LABEL_DETECTION.
+        "labelDetectionMode": "A String", # What labels should be detected with LABEL_DETECTION, in addition to
+            # video-level labels or segment-level labels.
+            # If unspecified, defaults to `SHOT_MODE`.
+        "model": "A String", # Model to use for label detection.
+            # Supported values: "builtin/stable" (the default if unset) and
+            # "builtin/latest".
+        "stationaryCamera": True or False, # Whether the video has been shot from a stationary (i.e. non-moving) camera.
+            # When set to true, might improve detection accuracy for moving objects.
+            # Should be used with `SHOT_AND_FRAME_MODE` enabled.
+        "frameConfidenceThreshold": 3.14, # The confidence threshold we perform filtering on the labels from
+            # frame-level detection. If not set, it is set to 0.4 by default. The valid
+            # range for this threshold is [0.1, 0.9]. Any value set outside of this
+            # range will be clipped.
+            # Note: for best results please follow the default threshold. We will update
+            # the default threshold everytime when we release a new model.
+        "videoConfidenceThreshold": 3.14, # The confidence threshold we perform filtering on the labels from
+            # video-level and shot-level detections. If not set, it is set to 0.3 by
+            # default. The valid range for this threshold is [0.1, 0.9]. Any value set
+            # outside of this range will be clipped.
+            # Note: for best results please follow the default threshold. We will update
+            # the default threshold everytime when we release a new model.
+      },
+      "explicitContentDetectionConfig": { # Config for EXPLICIT_CONTENT_DETECTION. # Config for EXPLICIT_CONTENT_DETECTION.
+        "model": "A String", # Model to use for explicit content detection.
+            # Supported values: "builtin/stable" (the default if unset) and
+            # "builtin/latest".
+      },
+      "objectTrackingConfig": { # Config for OBJECT_TRACKING. # Config for OBJECT_TRACKING.
+        "model": "A String", # Model to use for object tracking.
+            # Supported values: "builtin/stable" (the default if unset) and
+            # "builtin/latest".
+      },
+    },
+    "features": [ # Requested video annotation features.
+      "A String",
+    ],
+    "inputContent": "A String", # The video data bytes.
+        # If unset, the input video(s) should be specified via `input_uri`.
+        # If set, `input_uri` should be unset.
+    "inputUri": "A String", # Input video location. Currently, only
+        # [Google Cloud Storage](https://cloud.google.com/storage/) URIs are
+        # supported, which must be specified in the following format:
+        # `gs://bucket-id/object-id` (other URI formats return
+        # google.rpc.Code.INVALID_ARGUMENT). For more information, see
+        # [Request URIs](/storage/docs/reference-uris).
+        # A video URI may include wildcards in `object-id`, and thus identify
+        # multiple videos. Supported wildcards: '*' to match 0 or more characters;
+        # '?' to match 1 character. If unset, the input video should be embedded
+        # in the request as `input_content`. If set, `input_content` should be unset.
+    "locationId": "A String", # Optional cloud region where annotation should take place. Supported cloud
+        # regions: `us-east1`, `us-west1`, `europe-west1`, `asia-east1`. If no region
+        # is specified, a region will be determined based on video file location.
+    "outputUri": "A String", # Optional location where the output (in JSON format) should be stored.
+        # Currently, only [Google Cloud Storage](https://cloud.google.com/storage/)
+        # URIs are supported, which must be specified in the following format:
+        # `gs://bucket-id/object-id` (other URI formats return
+        # google.rpc.Code.INVALID_ARGUMENT). For more information, see
+        # [Request URIs](/storage/docs/reference-uris).
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # This resource represents a long-running operation that is the result of a
+      # network API call.
+    "metadata": { # Service-specific metadata associated with the operation.  It typically
+        # contains progress information and common metadata such as create time.
+        # Some services might not provide such metadata.  Any method that returns a
+        # long-running operation should document the metadata type, if any.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "error": { # The `Status` type defines a logical error model that is suitable for # The error result of the operation in case of failure or cancellation.
+        # different programming environments, including REST APIs and RPC APIs. It is
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
+        #
+        # You can find out more about this error model and how to work with it in the
+        # [API Design Guide](https://cloud.google.com/apis/design/errors).
+      "message": "A String", # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+      "details": [ # A list of messages that carry the error details.  There is a common set of
+          # message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+    },
+    "done": True or False, # 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.
+    "response": { # 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 standard
+        # `Get`/`Create`/`Update`, the response should be the resource.  For other
+        # methods, the response should have the type `XxxResponse`, where `Xxx`
+        # is the original method name.  For example, if the original method name
+        # is `TakeSnapshot()`, the inferred response type is
+        # `TakeSnapshotResponse`.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "name": "A String", # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should be a resource name ending with `operations/{unique_id}`.
+  }</pre>
+</div>
+
+</body></html>
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