IDOL 23.2.2

# Media Server

Media Server is an ACI server. For details of changes that affect all ACI servers, see ACI Server Framework.

## 23.2.2

Media Server 23.2.2 resolves an issue that prevented more than one speech-to-text model version being loaded for the same language. For example, it was not possible to run tasks using both the `small` and `large` models to process `ENUK` speech.

## 23.2.0

### New Features

- Media Server supports new speech-to-text models that offer significantly better accuracy, especially for English speech. The speech-to-text analysis engine has a new configuration parameter, `ModelVersion`. The default behavior (`ModelVersion=legacy`) uses the same models as Media Server 12.x. To use one of the new speech to text models you must set this parameter to either `small` (the fastest of the new models) or `large` (which offers the best accuracy). Custom language models and custom word dictionaries are neither necessary nor supported with the new models, because the vocabulary of the new models is not limited by their training. Due to their size, the new models are not included in the Media Server package and must be downloaded separately.
- Media Server can perform speaker clustering, which segments an audio recording into different speakers. There is a new analysis engine (`Type=ClusterSpeech`). Speaker clustering does not need training but does require that you install an appropriate speech-to-text language pack.
- Transcript alignment (`action=AlignAudioTranscript`) has a new parameter named `IngestDateTime`. You can use this to configure the start time for the timestamps. For example, set this parameter when you want the timestamps to match the time when the video was broadcast.
- Face recognition accuracy has been significantly improved.
- OCR accuracy has been improved when processing high resolution images in scene mode.
- The OCR `WordResult` track supports scrolling text (often seen below television news broadcasts).
- Strict action validation has been extended so that it validates any session configuration that you pass to a `process` action. When strict action validation is used, the `process` action will fail immediately if the configuration includes unknown parameters, or includes a configuration section that is referenced but contains no parameters.

### Resolved Issues

- Media Server could terminate unexpectedly when running Optical Character Recognition (OCR).
- Some temporary files produced by KeyView were written to the system temporary directory, rather than the location specified by the `TempDir` parameter in the `[Paths]` section of the configuration file. Some temporary files were not deleted when no longer required.

### Notes

- The older session configuration format, which was replaced in Media Server 12.0, is no longer supported. Media Server 23.2 only reads the list of processing tasks from the `[Session]` section of the configuration file. The older section names, such as `[Ingest]`, `[Analysis]`, `[Transform]`, `[Encoding]`, and `[Output]`, are now ignored.
- Media Server no longer supports the alias `Image_1` for the `Default_Image` track. In your session configuration files, replace `Image_1` with `Default_Image`. This change does not affect fully-qualified track names such as `TaskName.Image_1`, where `TaskName` is the name of an ingest task.
- The deprecated parameters `Language` and `CustomLM` have been removed from the speech-to-text analysis engine. Use the `LanguagePack` and `CustomLanguageModel` parameters instead.
- Strict action validation has been enabled by default. If you prefer to disable this, set the configuration parameter `StrictActionValidation=FALSE` in the `[Server]` section of the configuration file.
- The records in the OCR `WordData` and `WordResult` tracks now have unique UUIDs for each word. In earlier versions of Media Server all of the words on the same line had the same UUID. Now, there is a unique UUID for each word and the `parentID` field provides the UUID of the parent line.

## Deprecated Features

The following features are deprecated and might be removed in a future release.

Category | Deprecated Feature | Deprecated Since
--- | --- | ---
Speech processing | The `SampleFrequency` parameter, for speech-to-text and for the `AlignAudioTranscript` action, has been deprecated. Media Server can now determine the correct sample frequency from the language pack. | 23.2.0
Transcript alignment | The output of the `AlignAudioTranscript` action has been updated. The `startTime`, `duration`, and `endTime` fields (which provide timestamps in milliseconds from the beginning of the file) have been deprecated. There is now a `timestamp` field that provides timestamp information in both ISO 8601 format and in epoch microseconds. | 23.2.0
Face detection | In the XML output from face detection there are fields named `outOfPlaneAngleX`, `outOfPlaneAngleY`, and `percentageInImage`. The macros and Lua table entries that were available to access these data were named `outofplaneanglex`, `outofplaneangley`, and `percentageinimage` (note the difference in case). Media Server has been updated so that the macros and Lua table entries are consistent with the XML output. The all-lowercase names have been deprecated and will be removed in a future release. | 23.2.0
OCR | The `Blacklist` and `Whitelist` configuration parameters have been deprecated. Use the parameters `DisabledCharacters` and `ExtraEnabledCharacters` instead. | 23.2.0
Actions | The `GetLatestRecord` action. The new actions `KeepLatestRecords` and `GetLatestRecords` provide more control over what to store and retrieve. | 12.5.0

## Supported Platforms

Media Server 23.2.0 is supported on the following platforms.

Windows (x86-64)

- Windows Server 2022
- Windows Server 2019
- Windows Server 2016
- Windows Server 2012

Linux (x86-64)

The minimum supported versions of particular distributions are:

- Red Hat Enterprise Linux (RHEL) 7
- CentOS 7
- SuSE Linux Enterprise Server (SLES) 12
- Ubuntu 14.04
- Debian 8

## Documentation

The following documentation is available for Media Server version 23.2.0.

- Media Server Help

Copyright 2023 Open Text
Version 23.2.2 | Last updated May 2023

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Product: IDOL 23.2.2

Topic Title: Media Server