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StreamMerging_BackgroundAudio.php
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StreamMerging_BackgroundAudio.php
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<?php
require './vendor/autoload.php';
require_once('./common/ConfigProvider.php');
use BitmovinApiSdk\BitmovinApi;
use BitmovinApiSdk\Common\BitmovinApiException;
use BitmovinApiSdk\Common\Logging\ConsoleLogger;
use BitmovinApiSdk\Configuration;
use BitmovinApiSdk\Models\AacAudioConfiguration;
use BitmovinApiSdk\Models\AclEntry;
use BitmovinApiSdk\Models\AclPermission;
use BitmovinApiSdk\Models\AudioMixChannelType;
use BitmovinApiSdk\Models\AudioMixInputChannelLayout;
use BitmovinApiSdk\Models\AudioMixInputStream;
use BitmovinApiSdk\Models\AudioMixInputStreamChannel;
use BitmovinApiSdk\Models\AudioMixInputStreamSourceChannel;
use BitmovinApiSdk\Models\AudioMixSourceChannelType;
use BitmovinApiSdk\Models\CodecConfiguration;
use BitmovinApiSdk\Models\Encoding;
use BitmovinApiSdk\Models\EncodingOutput;
use BitmovinApiSdk\Models\H264VideoConfiguration;
use BitmovinApiSdk\Models\HttpInput;
use BitmovinApiSdk\Models\IngestInputStream;
use BitmovinApiSdk\Models\Input;
use BitmovinApiSdk\Models\MessageType;
use BitmovinApiSdk\Models\Mp4Muxing;
use BitmovinApiSdk\Models\MuxingStream;
use BitmovinApiSdk\Models\Output;
use BitmovinApiSdk\Models\PresetConfiguration;
use BitmovinApiSdk\Models\S3Output;
use BitmovinApiSdk\Models\StartEncodingRequest;
use BitmovinApiSdk\Models\Status;
use BitmovinApiSdk\Models\Stream;
use BitmovinApiSdk\Models\StreamInput;
use BitmovinApiSdk\Models\StreamMode;
use BitmovinApiSdk\Models\StreamSelectionMode;
use BitmovinApiSdk\Models\Task;
/**
* This example demonstrates how to merge multiple stereo streams (from a single file, but this can
* easily be extended to select them from separate input files), adjusting gain on the second stream
* to turn it into a background effect.
*
* <p>This example illustrates one of the use cases in the [tutorial on audio manipulations]
* (https://bitmovin.com/docs/encoding/tutorials/separating-and-combining-audio-streams)
*
* <p>The following configuration parameters are expected:
*
* <ul>
* <li>BITMOVIN_API_KEY - Your API key for the Bitmovin API
* <li>BITMOVIN_TENANT_ORG_ID - (optional) The ID of the Organisation in which you want to perform
* the encoding.
* <li>HTTP_INPUT_HOST - The Hostname or IP address of the HTTP server hosting your input files,
* e.g.: my-storage.biz
* <li>HTTP_INPUT_FILE_PATH_TWO_STEREO_TRACKS - the path to a file containing a video with 2 stereo tracks
* <li>S3_OUTPUT_BUCKET_NAME - The name of your S3 output bucket. Example: my-bucket-name
* <li>S3_OUTPUT_ACCESS_KEY - The access key of your S3 output bucket
* <li>S3_OUTPUT_SECRET_KEY - The secret key of your S3 output bucket
* <li>S3_OUTPUT_BASE_PATH - The base path on your S3 output bucket where content will be written.
* Example: /outputs
* </ul>
*
* <p>Configuration parameters will be retrieved from these sources in the listed order:
*
* <ol>
* <li>command line arguments (eg BITMOVIN_API_KEY=xyz)
* <li>properties file located in the root folder of the JAVA examples at ./examples.properties
* (see examples.properties.template as reference)
* <li>environment variables
* <li>properties file located in the home folder at ~/.bitmovin/examples.properties (see
* examples.properties.template as reference)
* </ol>
*/
$exampleName = 'StreamMerging_BackgroundAudio';
$configProvider = new ConfigProvider();
try {
$bitmovinApi = new BitmovinApi(Configuration::create()
->apiKey($configProvider->getBitmovinApiKey())
// uncomment the following line if you are working with a multi-tenant account
// ->tenantOrgId($configProvider->getBitmovinTenantOrgId())
->logger(new ConsoleLogger())
);
$encoding = createEncoding(
"Audio Mapping - Stream Merging",
"Multiple stereo input tracks -> Output with single merged stereo track");
$input = createHttpInput($configProvider->getHttpInputHost());
$inputFilePath = $configProvider->getHttpInputFilePathWithTwoStereoTracks();
$output = createS3Output(
$configProvider->getS3OutputBucketName(),
$configProvider->getS3OutputAccessKey(),
$configProvider->getS3OutputSecretKey()
);
$h264Config = createH264VideoConfig();
$aacConfig = createAacStereoAudioConfig();
$videoIngestInputStream = createIngestInputStream($encoding, $input, $inputFilePath);
$mainAudioIngestInputStream =
createIngestInputStreamForAudioTrack($encoding, $input, $inputFilePath, 0);
$secondaryAudioIngestInputStream =
createIngestInputStreamForAudioTrack($encoding, $input, $inputFilePath, 1);
$secondaryAudioMixInputStream = new AudioMixInputStream();
$secondaryAudioMixInputStream->channelLayout(AudioMixInputChannelLayout::CL_STEREO());
for ($i = 0; $i <= 1; $i++) {
$sourceChannel = new AudioMixInputStreamSourceChannel();
$sourceChannel->type(AudioMixSourceChannelType::CHANNEL_NUMBER());
$sourceChannel->channelNumber($i);
$sourceChannel->gain(0.5);
$inputStreamChannel = new AudioMixInputStreamChannel();
$inputStreamChannel->inputStreamId($secondaryAudioIngestInputStream->id);
$inputStreamChannel->outputChannelType(AudioMixChannelType::CHANNEL_NUMBER());
$inputStreamChannel->outputChannelNumber($i);
$inputStreamChannel->sourceChannels([$sourceChannel]);
$secondaryAudioMixInputStream->audioMixChannels[] = $inputStreamChannel;
}
$secondaryAudioMixInputStream = $bitmovinApi->encoding->encodings->inputStreams->audioMix->create($encoding->id, $secondaryAudioMixInputStream);
$videoStream = createStream($encoding, array($videoIngestInputStream), $h264Config);
$audioStream = createStream($encoding, array($mainAudioIngestInputStream, $secondaryAudioMixInputStream), $aacConfig);
createMp4Muxing($encoding, $output, "/", array($videoStream, $audioStream), "stereo-track-merged.mp4");
$startEncodingRequest = new StartEncodingRequest();
executeEncoding($encoding, $startEncodingRequest);
} catch (Exception $exception) {
echo $exception;
}
/**
* Starts the actual encoding process and periodically polls its status until it reaches a final
* state
*
* <p>API endpoints:
* https://bitmovin.com/docs/encoding/api-reference/all#/Encoding/PostEncodingEncodingsStartByEncodingId
* https://bitmovin.com/docs/encoding/api-reference/sections/encodings#/Encoding/GetEncodingEncodingsStatusByEncodingId
*
* <p>Please note that you can also use our webhooks API instead of polling the status. For more
* information consult the API spec:
* https://bitmovin.com/docs/encoding/api-reference/sections/notifications-webhooks
*
* @param Encoding $encoding The encoding to be started
* @param StartEncodingRequest $startEncodingRequest The request object to be sent with the start call
* @throws BitmovinApiException
* @throws Exception
*/
function executeEncoding(Encoding $encoding, StartEncodingRequest $startEncodingRequest)
{
global $bitmovinApi;
$bitmovinApi->encoding->encodings->start($encoding->id, $startEncodingRequest);
do {
sleep(5);
$task = $bitmovinApi->encoding->encodings->status($encoding->id);
echo 'Encoding status is ' . $task->status . ' (progress: ' . $task->progress . ' %)' . PHP_EOL;
} while ($task->status != Status::FINISHED() && $task->status != Status::ERROR());
if ($task->status == Status::ERROR()) {
logTaskErrors($task);
throw new Exception('Encoding failed');
}
echo 'Encoding finished successfully' . PHP_EOL;
}
/**
* Creates an MP4 muxing.
*
* <p>API endpoint:
* https://bitmovin.com/docs/encoding/api-reference/sections/encodings#/Encoding/PostEncodingEncodingsMuxingsMp4ByEncodingId
*
* @param Encoding $encoding The encoding to add the MP4 muxing to
* @param Output $output The output that should be used for the muxing to write the segments to
* @param string $outputPath The output path where the fragments will be written to
* @param array $streams A list of streams to be added to the muxing
* @param string $filename The name of the file that will be written to the output
* @return Mp4Muxing
* @throws BitmovinApiException
*/
function createMp4Muxing(Encoding $encoding, Output $output, string $outputPath, array $streams, string $filename): Mp4Muxing
{
global $bitmovinApi;
$muxing = new Mp4Muxing();
$muxing->outputs([buildEncodingOutput($output, $outputPath)]);
$muxing->fileName($filename);
foreach ($streams as $stream) {
$muxingStream = new MuxingStream();
$muxingStream->streamId($stream->id);
$muxing->streams[] = $muxingStream;
}
return $bitmovinApi->encoding->encodings->muxings->mp4->create($encoding->id, $muxing);
}
/**
* Creates a configuration for the H.264 video codec to be applied to video streams.
*
* <p>The output resolution is defined by setting the height to 1080 pixels. Width will be
* determined automatically to maintain the aspect ratio of your input video.
*
* <p>To keep things simple, we use a quality-optimized VoD preset configuration, which will apply
* proven settings for the codec. See <a
* href="https://bitmovin.com/docs/encoding/tutorials/how-to-optimize-your-h264-codec-configuration-for-different-use-cases">How
* to optimize your H264 codec configuration for different use-cases</a> for alternative presets.
*
* <p>API endpoint:
* https://bitmovin.com/docs/encoding/api-reference/sections/configurations#/Encoding/PostEncodingConfigurationsVideoH264
*
* @return H264VideoConfiguration
* @throws BitmovinApiException
*/
function createH264VideoConfig(): H264VideoConfiguration
{
global $bitmovinApi;
$h264Config = new H264VideoConfiguration();
$h264Config->name("H.264 1080p 1.5 Mbit/s");
$h264Config->presetConfiguration(PresetConfiguration::VOD_STANDARD());
$h264Config->height(1080);
$h264Config->bitrate(1500000);
return $bitmovinApi->encoding->configurations->video->h264->create($h264Config);
}
/**
* Creates a configuration for the AAC audio codec to be applied to audio streams.
*
* <p>API endpoint:
* https://bitmovin.com/docs/encoding/api-reference/sections/configurations#/Encoding/PostEncodingConfigurationsAudioAac
* @return AacAudioConfiguration
* @throws BitmovinApiException
*/
function createAacStereoAudioConfig(): AacAudioConfiguration
{
global $bitmovinApi;
$aacConfig = new AacAudioConfiguration();
$aacConfig->name("AAC 128 kbit/s");
$aacConfig->bitrate(128000);
return $bitmovinApi->encoding->configurations->audio->aac->create($aacConfig);
}
/**
* Adds a video or audio stream to an encoding
*
* <p>API endpoint:
* https://bitmovin.com/docs/encoding/api-reference/sections/encodings#/Encoding/PostEncodingEncodingsStreamsByEncodingId
*
* @param Encoding $encoding The encoding to which the stream will be added
* @param array $inputStreams The list of inputStream resources providing the input file, to be merged
* @param CodecConfiguration $codecConfiguration The codec configuration to be applied to the stream
* @return Stream
* @throws BitmovinApiException
*/
function createStream(Encoding $encoding, array $inputStreams, CodecConfiguration $codecConfiguration): Stream
{
global $bitmovinApi;
$stream = new Stream();
$stream->codecConfigId($codecConfiguration->id);
$stream->mode(StreamMode::STANDARD());
for ($i = 0; $i < sizeof($inputStreams); $i++) {
$streamInput = new StreamInput();
$streamInput->inputStreamId($inputStreams[$i]->id);
$stream->inputStreams[] = $streamInput;
}
return $bitmovinApi->encoding->encodings->streams->create($encoding->id, $stream);
}
/**
* Creates an IngestInputStream and adds it to an encoding
*
* <p>The IngestInputStream is used to define where a file to read a stream from is located
*
* <p>API endpoint:
* https://bitmovin.com/docs/encoding/api-reference/sections/encodings#/Encoding/PostEncodingEncodingsInputStreamsIngestByEncodingId
*
* @param Encoding $encoding The encoding to which the stream will be added
* @param Input $input The input resource providing the input file
* @param string $inputPath The path to the input file
* @return IngestInputStream
* @throws BitmovinApiException
*/
function createIngestInputStream(Encoding $encoding, Input $input, string $inputPath): IngestInputStream
{
global $bitmovinApi;
$ingestInputStream = new IngestInputStream();
$ingestInputStream->inputId($input->id);
$ingestInputStream->inputPath($inputPath);
$ingestInputStream->selectionMode(StreamSelectionMode::AUTO());
return $bitmovinApi->encoding->encodings->inputStreams->ingest->create($encoding->id, $ingestInputStream);
}
/**
* Creates an IngestInputStream to select a specific audio strack in the input, and adds it to an
* encoding
*
* <p>The IngestInputStream is used to define where a file to read a stream from is located
*
* <p>API endpoint:
* https://bitmovin.com/docs/encoding/api-reference/sections/encodings#/Encoding/PostEncodingEncodingsInputStreamsIngestByEncodingId
*
* @param Encoding $encoding The encoding to which the stream will be added
* @param Input $input The input resource providing the input file
* @param string $inputPath The path to the input file
* @param int $position The relative position of the audio track to select in the input file
* @return IngestInputStream
* @throws BitmovinApiException
*/
function createIngestInputStreamForAudioTrack(Encoding $encoding, Input $input, string $inputPath, int $position): IngestInputStream
{
global $bitmovinApi;
$ingestInputStream = new IngestInputStream();
$ingestInputStream->inputId($input->id);
$ingestInputStream->inputPath($inputPath);
$ingestInputStream->selectionMode(StreamSelectionMode::AUDIO_RELATIVE());
$ingestInputStream->position($position);
return $bitmovinApi->encoding->encodings->inputStreams->ingest->create($encoding->id, $ingestInputStream);
}
/**
* Creates a resource representing an AWS S3 cloud storage bucket to which generated content will
* be transferred. For alternative output methods see <a
* href="https://bitmovin.com/docs/encoding/articles/supported-input-output-storages">list of
* supported input and output storages</a>
*
* <p>The provided credentials need to allow <i>read</i>, <i>write</i> and <i>list</i> operations.
* <i>delete</i> should also be granted to allow overwriting of existings files. See <a
* href="https://bitmovin.com/docs/encoding/faqs/how-do-i-create-a-aws-s3-bucket-which-can-be-used-as-output-location">creating
* an S3 bucket and setting permissions</a> for further information
*
* <p>For reasons of simplicity, a new output resource is created on each execution of this
* example. In production use, this method should be replaced by a <a
* href="https://bitmovin.com/docs/encoding/api-reference/sections/outputs#/Encoding/GetEncodingOutputsS3">get
* call</a> retrieving an existing resource.
*
* <p>API endpoint:
* https://bitmovin.com/docs/encoding/api-reference/sections/outputs#/Encoding/PostEncodingOutputsS3
*
* @param string $bucketName The name of the S3 bucket
* @param string $accessKey The access key of your S3 account
* @param string $secretKey The secret key of your S3 account
* @return S3Output
* @throws BitmovinApiException
*/
function createS3Output(string $bucketName, string $accessKey, string $secretKey): S3Output
{
global $bitmovinApi;
$output = new S3Output();
$output->bucketName($bucketName);
$output->accessKey($accessKey);
$output->secretKey($secretKey);
return $bitmovinApi->encoding->outputs->s3->create($output);
}
/**
* Creates a resource representing an HTTP server providing the input files. For alternative input
* methods see <a
* href="https://bitmovin.com/docs/encoding/articles/supported-input-output-storages">list of
* supported input and output storages</a>
*
* <p>For reasons of simplicity, a new input resource is created on each execution of this
* example. In production use, this method should be replaced by a <a
* href="https://bitmovin.com/docs/encoding/api-reference/sections/inputs#/Encoding/GetEncodingInputsHttpByInputId">get
* call</a> to retrieve an existing resource.
*
* <p>API endpoint:
* https://bitmovin.com/docs/encoding/api-reference/sections/inputs#/Encoding/PostEncodingInputsHttp
*
* @param string $host The hostname or IP address of the HTTP server e.g.: my-storage.biz
* @return HttpInput
* @throws BitmovinApiException
*/
function createHttpInput(string $host): HttpInput
{
global $bitmovinApi;
$input = new HttpInput();
$input->host($host);
return $bitmovinApi->encoding->inputs->http->create($input);
}
/**
* Creates an Encoding object. This is the base object to configure your encoding.
*
* <p>API endpoint:
* https://bitmovin.com/docs/encoding/api-reference/sections/encodings#/Encoding/PostEncodingEncodings
*
* @param string $name A name that will help you identify the encoding in our dashboard (required)
* @param string $description description A description of the encoding (optional)
* @return Encoding
* @throws BitmovinApiException
*/
function createEncoding(string $name, string $description): Encoding
{
global $bitmovinApi;
$encoding = new Encoding();
$encoding->name($name);
$encoding->description($description);
return $bitmovinApi->encoding->encodings->create($encoding);
}
/**
* Builds an EncodingOutput object which defines where the output content (e.g. of a muxing) will
* be written to. Public read permissions will be set for the files written, so they can be
* accessed easily via HTTP.
*
* @param Output $output The output resource to be used by the EncodingOutput
* @param string $outputPath The path where the content will be written to
* @return EncodingOutput
* @throws Exception
*/
function buildEncodingOutput(Output $output, string $outputPath): EncodingOutput
{
$aclEntry = new AclEntry();
$aclEntry->permission(AclPermission::PUBLIC_READ());
$encodingOutput = new EncodingOutput();
$encodingOutput->outputPath(buildAbsolutePath($outputPath));
$encodingOutput->outputId($output->id);
$encodingOutput->acl([$aclEntry]);
return $encodingOutput;
}
/**
* Builds an absolute path by concatenating the S3_OUTPUT_BASE_PATH configuration parameter, the
* name of this example and the given relative path
*
* <p>e.g.: /s3/base/path/exampleName/relative/path
*
* @param string $relativePath The relaitve path that is concatenated
* @return string
* @throws Exception
*/
function buildAbsolutePath(string $relativePath): string
{
global $exampleName, $configProvider;
return $configProvider->getS3OutputBasePath() . $exampleName . DIRECTORY_SEPARATOR . trim($relativePath, DIRECTORY_SEPARATOR);
}
function logTaskErrors(Task $task)
{
if ($task->messages == null) {
return;
}
$messages = array_filter($task->messages, function ($msg) {
return $msg->type == MessageType::ERROR();
});
foreach ($messages as $message) {
echo $message->text . PHP_EOL;
}
}