Creare un job di transcodifica che incorpora i sottotitoli nel video di output. I sottotitoli possono includere sia i sottotitoli.
Per saperne di più
Per la documentazione dettagliata che include questo esempio di codice, vedi quanto segue:
Esempio di codice
Go
Prima di provare questo esempio, segui le istruzioni per la configurazione di Go nella guida rapida all'API Transcoder mediante le librerie client. Per ulteriori informazioni, consulta la documentazione di riferimento per l'API Transcoder API Go.
import (
"context"
"fmt"
"io"
transcoder "cloud.google.com/go/video/transcoder/apiv1"
"cloud.google.com/go/video/transcoder/apiv1/transcoderpb"
)
// createJobWithEmbeddedCaptions creates a job that embeds captions in the
// output video. See https://cloud.google.com/transcoder/docs/how-to/captions-and-subtitles
// for more information.
func createJobWithEmbeddedCaptions(w io.Writer, projectID string, location string, inputVideoURI string, inputCaptionsURI string, outputURI string) error {
// projectID := "my-project-id"
// location := "us-central1"
// inputVideoURI := "gs://my-bucket/my-video-file"
// inputCaptionsURI := "gs://my-bucket/my-captions-file"
// outputURI := "gs://my-bucket/my-output-folder/"
ctx := context.Background()
client, err := transcoder.NewClient(ctx)
if err != nil {
return fmt.Errorf("NewClient: %v", err)
}
defer client.Close()
req := &transcoderpb.CreateJobRequest{
Parent: fmt.Sprintf("projects/%s/locations/%s", projectID, location),
Job: &transcoderpb.Job{
OutputUri: outputURI,
JobConfig: &transcoderpb.Job_Config{
Config: &transcoderpb.JobConfig{
Inputs: []*transcoderpb.Input{
{
Key: "input0",
Uri: inputVideoURI,
},
{
Key: "caption_input0",
Uri: inputCaptionsURI,
},
},
EditList: []*transcoderpb.EditAtom{
{
Key: "atom0",
Inputs: []string{"input0", "caption_input0"},
},
},
ElementaryStreams: []*transcoderpb.ElementaryStream{
{
Key: "video_stream0",
ElementaryStream: &transcoderpb.ElementaryStream_VideoStream{
VideoStream: &transcoderpb.VideoStream{
CodecSettings: &transcoderpb.VideoStream_H264{
H264: &transcoderpb.VideoStream_H264CodecSettings{
BitrateBps: 550000,
FrameRate: 60,
HeightPixels: 360,
WidthPixels: 640,
},
},
},
},
},
{
Key: "audio_stream0",
ElementaryStream: &transcoderpb.ElementaryStream_AudioStream{
AudioStream: &transcoderpb.AudioStream{
Codec: "aac",
BitrateBps: 64000,
},
},
},
{
Key: "cea-stream0",
ElementaryStream: &transcoderpb.ElementaryStream_TextStream{
TextStream: &transcoderpb.TextStream{
Codec: "cea608",
Mapping: []*transcoderpb.TextStream_TextMapping{
{
AtomKey: "atom0",
InputKey: "caption_input0",
InputTrack: 0,
},
},
},
},
},
},
MuxStreams: []*transcoderpb.MuxStream{
{
Key: "sd",
Container: "mp4",
ElementaryStreams: []string{"video_stream0", "audio_stream0"},
},
{
Key: "sd-hls",
Container: "ts",
ElementaryStreams: []string{"video_stream0", "audio_stream0"},
},
{
Key: "sd-dash",
Container: "fmp4",
ElementaryStreams: []string{"video_stream0"},
},
{
Key: "audio-dash",
Container: "fmp4",
ElementaryStreams: []string{"audio_stream0"},
},
},
Manifests: []*transcoderpb.Manifest{
{
FileName: "manifest.m3u8",
Type: transcoderpb.Manifest_HLS,
MuxStreams: []string{"sd-hls"},
},
{
FileName: "manifest.mpd",
Type: transcoderpb.Manifest_DASH,
MuxStreams: []string{"sd-dash", "audio-dash"},
},
},
},
},
},
}
// Creates the job. Jobs take a variable amount of time to run.
// You can query for the job state; see getJob() in get_job.go.
response, err := client.CreateJob(ctx, req)
if err != nil {
return fmt.Errorf("CreateJob: %v", err)
}
fmt.Fprintf(w, "Job: %v", response.GetName())
return nil
}
Java
Prima di provare questo esempio, segui le istruzioni per la configurazione di Java nella guida rapida all'API Transcoder mediante le librerie client. Per ulteriori informazioni, consulta la documentazione di riferimento per l'API Transcoder API Java.
import com.google.cloud.video.transcoder.v1.AudioStream;
import com.google.cloud.video.transcoder.v1.CreateJobRequest;
import com.google.cloud.video.transcoder.v1.EditAtom;
import com.google.cloud.video.transcoder.v1.ElementaryStream;
import com.google.cloud.video.transcoder.v1.Input;
import com.google.cloud.video.transcoder.v1.Job;
import com.google.cloud.video.transcoder.v1.JobConfig;
import com.google.cloud.video.transcoder.v1.LocationName;
import com.google.cloud.video.transcoder.v1.Manifest;
import com.google.cloud.video.transcoder.v1.Manifest.ManifestType;
import com.google.cloud.video.transcoder.v1.MuxStream;
import com.google.cloud.video.transcoder.v1.Output;
import com.google.cloud.video.transcoder.v1.TextStream;
import com.google.cloud.video.transcoder.v1.TextStream.TextMapping;
import com.google.cloud.video.transcoder.v1.TranscoderServiceClient;
import com.google.cloud.video.transcoder.v1.VideoStream;
import java.io.IOException;
public class CreateJobWithEmbeddedCaptions {
public static void main(String[] args) throws IOException {
// TODO(developer): Replace these variables before running the sample.
String projectId = "my-project-id";
String location = "us-central1";
String inputVideoUri = "gs://my-bucket/my-video-file";
String inputCaptionsUri = "gs://my-bucket/my-captions-file";
String outputUri = "gs://my-bucket/my-output-folder/";
createJobWithEmbeddedCaptions(projectId, location, inputVideoUri, inputCaptionsUri, outputUri);
}
// Creates a job from an ad-hoc configuration that embeds captions in the output video.
public static void createJobWithEmbeddedCaptions(
String projectId,
String location,
String inputVideoUri,
String inputCaptionsUri,
String outputUri)
throws IOException {
// Initialize client that will be used to send requests. This client only needs to be created
// once, and can be reused for multiple requests.
try (TranscoderServiceClient transcoderServiceClient = TranscoderServiceClient.create()) {
VideoStream videoStream0 =
VideoStream.newBuilder()
.setH264(
VideoStream.H264CodecSettings.newBuilder()
.setBitrateBps(550000)
.setFrameRate(60)
.setHeightPixels(360)
.setWidthPixels(640))
.build();
AudioStream audioStream0 =
AudioStream.newBuilder().setCodec("aac").setBitrateBps(64000).build();
TextStream textStream0 =
TextStream.newBuilder()
.setCodec("cea608")
.addMapping(
0,
TextMapping.newBuilder()
.setAtomKey("atom0")
.setInputKey("caption_input0")
.setInputTrack(0)
.build())
.build();
JobConfig config =
JobConfig.newBuilder()
.addInputs(Input.newBuilder().setKey("input0").setUri(inputVideoUri))
.addInputs(Input.newBuilder().setKey("caption_input0").setUri(inputCaptionsUri))
.addEditList(
0, // Index in the edit list
EditAtom.newBuilder()
.setKey("atom0")
.addInputs("input0")
.addInputs("caption_input0")
.build())
.setOutput(Output.newBuilder().setUri(outputUri))
.addElementaryStreams(
ElementaryStream.newBuilder()
.setKey("video_stream0")
.setVideoStream(videoStream0))
.addElementaryStreams(
ElementaryStream.newBuilder()
.setKey("audio_stream0")
.setAudioStream(audioStream0))
.addElementaryStreams(
ElementaryStream.newBuilder().setKey("cea_stream0").setTextStream(textStream0))
.addMuxStreams(
0,
MuxStream.newBuilder()
.setKey("sd")
.setContainer("mp4")
.addElementaryStreams("video_stream0")
.addElementaryStreams("audio_stream0")
.build())
.addMuxStreams(
1,
MuxStream.newBuilder()
.setKey("sd_hls")
.setContainer("ts")
.addElementaryStreams("video_stream0")
.addElementaryStreams("audio_stream0")
.build())
.addMuxStreams(
2,
MuxStream.newBuilder()
.setKey("sd_dash")
.setContainer("fmp4")
.addElementaryStreams("video_stream0")
.build())
.addMuxStreams(
3,
MuxStream.newBuilder()
.setKey("audio_dash")
.setContainer("fmp4")
.addElementaryStreams("audio_stream0")
.build())
.addManifests(
0,
Manifest.newBuilder()
.setFileName("manifest.m3u8")
.setType(ManifestType.HLS)
.addMuxStreams("sd_hls")
.build())
.addManifests(
1,
Manifest.newBuilder()
.setFileName("manifest.mpd")
.setType(ManifestType.DASH)
.addMuxStreams("sd_dash")
.addMuxStreams("audio_dash")
.build())
.build();
var createJobRequest =
CreateJobRequest.newBuilder()
.setJob(Job.newBuilder().setOutputUri(outputUri).setConfig(config).build())
.setParent(LocationName.of(projectId, location).toString())
.build();
// Send the job creation request and process the response.
Job job = transcoderServiceClient.createJob(createJobRequest);
System.out.println("Job: " + job.getName());
}
}
}Node.js
Prima di provare questo esempio, segui le istruzioni per la configurazione di Node.js nella guida rapida all'API Transcoder mediante le librerie client. Per ulteriori informazioni, consulta la documentazione di riferimento per l'API Transcoder API Node.js.
/**
* TODO(developer): Uncomment these variables before running the sample.
*/
// projectId = 'my-project-id';
// location = 'us-central1';
// inputVideoUri = 'gs://my-bucket/my-video-file';
// inputCaptionsUri = 'gs://my-bucket/my-captions-file';
// outputUri = 'gs://my-bucket/my-output-folder/';
// Imports the Transcoder library
const {TranscoderServiceClient} =
require('@google-cloud/video-transcoder').v1;
// Instantiates a client
const transcoderServiceClient = new TranscoderServiceClient();
async function createJobWithEmbeddedCaptions() {
// Construct request
const request = {
parent: transcoderServiceClient.locationPath(projectId, location),
job: {
outputUri: outputUri,
config: {
inputs: [
{
key: 'input0',
uri: inputVideoUri,
},
{
key: 'caption_input0',
uri: inputCaptionsUri,
},
],
editList: [
{
key: 'atom0',
inputs: ['input0', 'caption_input0'],
},
],
elementaryStreams: [
{
key: 'video-stream0',
videoStream: {
h264: {
heightPixels: 360,
widthPixels: 640,
bitrateBps: 550000,
frameRate: 60,
},
},
},
{
key: 'audio-stream0',
audioStream: {
codec: 'aac',
bitrateBps: 64000,
},
},
{
key: 'cea-stream0',
textStream: {
codec: 'cea608',
mapping: [
{
atomKey: 'atom0',
inputKey: 'caption_input0',
inputTrack: 0,
},
],
languageCode: 'en-US',
displayName: 'English',
},
},
],
muxStreams: [
{
key: 'sd-hls',
container: 'ts',
elementaryStreams: ['video-stream0', 'audio-stream0'],
},
{
key: 'sd-dash',
container: 'fmp4',
elementaryStreams: ['video-stream0'],
},
{
key: 'audio-dash',
container: 'fmp4',
elementaryStreams: ['audio-stream0'],
},
],
manifests: [
{
fileName: 'manifest.m3u8',
type: 'HLS',
muxStreams: ['sd-hls'],
},
{
fileName: 'manifest.mpd',
type: 'DASH',
muxStreams: ['sd-dash', 'audio-dash'],
},
],
},
},
};
// Run request
const [response] = await transcoderServiceClient.createJob(request);
console.log(`Job: ${response.name}`);
}
createJobWithEmbeddedCaptions();Python
Prima di provare questo esempio, segui le istruzioni per la configurazione di Python nella guida rapida all'API Transcoder mediante le librerie client. Per ulteriori informazioni, consulta la documentazione di riferimento per l'API Transcoder API Python.
import argparse
from google.cloud.video import transcoder_v1
from google.cloud.video.transcoder_v1.services.transcoder_service import (
TranscoderServiceClient,
)
def create_job_with_embedded_captions(
project_id,
location,
input_video_uri,
input_captions_uri,
output_uri,
):
"""Creates a job based on an ad-hoc job configuration that embeds captions in the output video.
Args:
project_id (str): The GCP project ID.
location (str): The location to start the job in.
input_video_uri (str): Uri of the input video in the Cloud Storage
bucket.
input_captions_uri (str): Uri of the input captions file in the Cloud
Storage bucket.
output_uri (str): Uri of the video output folder in the Cloud Storage
bucket."""
client = TranscoderServiceClient()
parent = f"projects/{project_id}/locations/{location}"
job = transcoder_v1.types.Job()
job.output_uri = output_uri
job.config = transcoder_v1.types.JobConfig(
inputs=[
transcoder_v1.types.Input(
key="input0",
uri=input_video_uri,
),
transcoder_v1.types.Input(
key="caption-input0",
uri=input_captions_uri,
),
],
edit_list=[
transcoder_v1.types.EditAtom(
key="atom0",
inputs=["input0", "caption-input0"],
),
],
elementary_streams=[
transcoder_v1.types.ElementaryStream(
key="video-stream0",
video_stream=transcoder_v1.types.VideoStream(
h264=transcoder_v1.types.VideoStream.H264CodecSettings(
height_pixels=360,
width_pixels=640,
bitrate_bps=550000,
frame_rate=60,
),
),
),
transcoder_v1.types.ElementaryStream(
key="audio-stream0",
audio_stream=transcoder_v1.types.AudioStream(
codec="aac", bitrate_bps=64000
),
),
transcoder_v1.types.ElementaryStream(
key="cea-stream0",
text_stream=transcoder_v1.types.TextStream(
codec="cea608",
mapping_=[
transcoder_v1.types.TextStream.TextMapping(
atom_key="atom0",
input_key="caption-input0",
input_track=0,
),
],
),
),
],
mux_streams=[
transcoder_v1.types.MuxStream(
key="sd",
container="mp4",
elementary_streams=["video-stream0", "audio-stream0"],
),
transcoder_v1.types.MuxStream(
key="sd-hls",
container="ts",
elementary_streams=["video-stream0", "audio-stream0"],
),
transcoder_v1.types.MuxStream(
key="sd-dash",
container="fmp4",
elementary_streams=["video-stream0"],
),
transcoder_v1.types.MuxStream(
key="audio-dash",
container="fmp4",
elementary_streams=["audio-stream0"],
),
],
manifests=[
transcoder_v1.types.Manifest(
file_name="manifest.m3u8",
type_="HLS",
mux_streams=["sd-hls"],
),
transcoder_v1.types.Manifest(
file_name="manifest.mpd",
type_="DASH",
mux_streams=["sd-dash", "audio-dash"],
),
],
)
response = client.create_job(parent=parent, job=job)
print(f"Job: {response.name}")
return response
Passaggi successivi
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