TeamTalk 5 Java DLL: Stream Media Files

TeamTalk 5 Java DLL Version 5.18A

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Classes | Enumerations | Functions | Variables
Stream Media Files

Get or query the raw RGB32 bitmap data of a user's video frame. More...

## Classes

struct | BearWare.AudioFormat
| Struct describing the audio format used by a media file. More...
struct | BearWare.MediaFileInfo
| Struct describing the audio and video format used by a media file. More...
struct | BearWare.MediaFilePlayback
| Properties for initializing or updating a file for media streaming. More...
struct | BearWare.AudioInputProgress
| The progress of the audio currently being processed as audio input. More...

## Enumerations

enum

BearWare.MediaFileStatus : uint {
BearWare.MediaFileStatus.MFS_CLOSED = 0 , BearWare.MediaFileStatus.MFS_ERROR = 1 , BearWare.MediaFileStatus.MFS_STARTED = 2 , BearWare.MediaFileStatus.MFS_FINISHED = 3 ,
BearWare.MediaFileStatus.MFS_ABORTED = 4 , BearWare.MediaFileStatus.MFS_PAUSED = 5 , BearWare.MediaFileStatus.MFS_PLAYING = 6
}

| Status of media file being written to disk. More...

enum

BearWare.AudioFileFormat : uint {
BearWare.AudioFileFormat.AFF_NONE = 0 , BearWare.AudioFileFormat.AFF_CHANNELCODEC_FORMAT = 1 , BearWare.AudioFileFormat.AFF_WAVE_FORMAT = 2 , BearWare.AudioFileFormat.AFF_MP3_16KBIT_FORMAT = 3 ,
BearWare.AudioFileFormat.AFF_MP3_32KBIT_FORMAT = 4 , BearWare.AudioFileFormat.AFF_MP3_64KBIT_FORMAT = 5 , BearWare.AudioFileFormat.AFF_MP3_128KBIT_FORMAT = 6 , BearWare.AudioFileFormat.AFF_MP3_256KBIT_FORMAT = 7 ,
BearWare.AudioFileFormat.AFF_MP3_320KBIT_FORMAT = 8
}

| Media file formats supported for muxed audio recordings. More...

## Functions

bool | BearWare.TeamTalkBase.StartStreamingMediaFileToChannel (string szMediaFilePath, VideoCodec lpVideoCodec)
| Stream media file to channel, e.g. avi-, wav- or MP3-file.
bool | BearWare.TeamTalkBase.StartStreamingMediaFileToChannel (string szMediaFilePath, MediaFilePlayback lpMediaFilePlayback, VideoCodec lpVideoCodec)
| Stream media file to channel, e.g. avi-, wav- or MP3-file.
bool | BearWare.TeamTalkBase.UpdateStreamingMediaFileToChannel (MediaFilePlayback lpMediaFilePlayback, VideoCodec lpVideoCodec)
| Update active media file being streamed to channel.
bool | BearWare.TeamTalkBase.StopStreamingMediaFileToChannel ()
| Stop streaming media file to channel.
int | BearWare.TeamTalkBase.InitLocalPlayback (string szMediaFilePath, MediaFilePlayback lpMediaFilePlayback)
| Play media file using settings from BearWare.TeamTalkBase instance.
bool | BearWare.TeamTalkBase.UpdateLocalPlayback (int nPlaybackSessionID, MediaFilePlayback lpMediaFilePlayback)
bool | BearWare.TeamTalkBase.StopLocalPlayback (int nPlaybackSessionID)
static bool | BearWare.TeamTalkBase.GetMediaFileInfo (string szMediaFilePath, ref MediaFileInfo lpMediaFileInfo)
| Get the properties of a media file.
VideoFrame | BearWare.TeamTalkBase.AcquireUserMediaVideoFrame (int nUserID, out Bitmap bmp)
| Extract a user's media video frame for display.
bool | BearWare.TeamTalkBase.ReleaseUserMediaVideoFrame (VideoFrame lpVideoFrame)
| Delete a user's video frame, acquired through TeamTalkBase.AcquireUserMediaVideoFrame(), so its allocated resources can be released.

## Variables

const uint | BearWare.TeamTalkBase.TT_MEDIAPLAYBACK_OFFSET_IGNORE = 0xFFFFFFFF

## Detailed Description

Get or query the raw RGB32 bitmap data of a user's video frame.

Media files, mp3, avi, wmv, wma, etc. can be streamed to a channel and controlled separately from the voice and video capture input. Streaming a media file requires UserRight.USERRIGHT_TRANSMIT_MEDIAFILE_AUDIO and/or UserRight.USERRIGHT_TRANSMIT_MEDIAFILE_VIDEO.

The media formats supported by the TeamTalk DLL depends on the platform. On Windows the Windows Media Player's API is used to convert media files to TeamTalk's internal formats (i.e. Speex, OPUS and WebM). So whatever Windows Media Player can play should also be possible to stream using TeamTalkBase. On Mac and Linux avconv is used for converting media files which in similar way makes use of what the platform provides.

Use BearWare.TeamTalkBase.GetMediaFileInfo() to see if the media file format is supported and what properties are used for audio and video.

To stream a media file to a channel call BearWare.TeamTalkBase.StartStreamingMediaFileToChannel() and to stop the stream call BearWare.TeamTalkBase.StopStreamingMediaFileToChannel(). The user receiving the media stream can control volume levels by calling BearWare.TeamTalkBase.SetUserVolume() and BearWare.TeamTalkBase.AcquireUserMediaVideoFrame() to obtain video frames.

Subscription of media files is controlled by Subscription.SUBSCRIBE_MEDIAFILE.

Parameters

  nUserID | The user's ID. 0 for local client instance.
  lpPicture | Reference to a bitmap which will receive the video frame. If the lpPicture reference is null or not the proper size a new Bitmap object will be allocated and returned instead. Ensure to ALWAYS call with the same lpPicture reference for each nUserID, otherwise a new Bitmap object will be allocated each time and cause the application to use a significant amount of memory.

See also
  PaintVideoFrame

## Enumeration Type Documentation

## ◆ MediaFileStatus

enum BearWare.MediaFileStatus : uint

Status of media file being written to disk.

See also
  CLIENTEVENT_USER_RECORD_MEDIAFILE

Enumerator
MFS_CLOSED |
MFS_ERROR | Error while processing media file.
MFS_STARTED | Started processing media file.
MFS_FINISHED | Finished processing media file.
MFS_ABORTED | Aborted processing of media file.
MFS_PAUSED | Paused processing of media file.
MFS_PLAYING | Playing media file with updated `uElapsedMSec` of BearWare.MediaFileInfo.

Definition at line 521 of file TeamTalk.cs.

## ◆ AudioFileFormat

enum BearWare.AudioFileFormat : uint

Media file formats supported for muxed audio recordings.

See also
  TeamTalkBase.StartRecordingMuxedAudioFile()

Enumerator
AFF_NONE | Used to denote nothing selected.

AFF_CHANNELCODEC_FORMAT

Store audio in the same format as the BearWare.Channel's configured audio codec.

Audio is stored in OGG format. OGG format is supported by https://www.xiph.org/ogg and can be played using VLC media player http://www.videolan.org

Requires TeamTalk version 5.2.0.4730.

See also
  TeamTalkBase.SetUserMediaStorageDir()
  TeamTalkBase.StartRecordingMuxedAudioFile()

AFF_WAVE_FORMAT | Store in PCM 16-bit wave format.
AFF_MP3_16KBIT_FORMAT | Store in MP3-format.

AFF_MP3_32KBIT_FORMAT

See also
  BearWare.AudioFileFormat.AFF_MP3_16KBIT_FORMAT

AFF_MP3_64KBIT_FORMAT

See also
  BearWare.AudioFileFormat.AFF_MP3_16KBIT_FORMAT

AFF_MP3_128KBIT_FORMAT

See also
  BearWare.AudioFileFormat.AFF_MP3_16KBIT_FORMAT

AFF_MP3_256KBIT_FORMAT

See also
  BearWare.AudioFileFormat.AFF_MP3_16KBIT_FORMAT

AFF_MP3_320KBIT_FORMAT

See also
  BearWare.AudioFileFormat.AFF_MP3_16KBIT_FORMAT

Definition at line 542 of file TeamTalk.cs.

## Function Documentation

## ◆ StartStreamingMediaFileToChannel() [1/2]

bool BearWare.TeamTalkBase.StartStreamingMediaFileToChannel | ( | string | szMediaFilePath,
|  | VideoCodec | lpVideoCodec )

Stream media file to channel, e.g. avi-, wav- or MP3-file.

See also
  TeamTalkBase.StartStreamingMediaFileToChannel()

Definition at line 5920 of file TeamTalk.cs.

## ◆ StartStreamingMediaFileToChannel() [2/2]

bool BearWare.TeamTalkBase.StartStreamingMediaFileToChannel | ( | string | szMediaFilePath,
|  | MediaFilePlayback | lpMediaFilePlayback,
|  | VideoCodec | lpVideoCodec )

Stream media file to channel, e.g. avi-, wav- or MP3-file.

Call TeamTalkBase.GetMediaFileInfo() to get the properties of a media file, i.e. audio and video format.

The event BearWare.ClientEvent.CLIENTEVENT_STREAM_MEDIAFILE is posted when the media file starts streaming. The flags BearWare.ClientFlag.CLIENT_STREAM_AUDIO and/or BearWare.ClientFlag.CLIENT_STREAM_VIDEO will be set if the call is successful.

A media file is streamed using BearWare.StreamType.STREAMTYPE_MEDIAFILE_AUDIO and/or BearWare.StreamType.STREAMTYPE_MEDIAFILE_VIDEO. To subscribe/unsubscribe a media file being streamed use BearWare.Subscription.SUBSCRIBE_MEDIAFILE.

Streaming a media file requires BearWare.UserRight.USERRIGHT_TRANSMIT_MEDIAFILE_VIDEO and/or BearWare.UserRight.USERRIGHT_TRANSMIT_MEDIAFILE_AUDIO.

Parameters

  szMediaFilePath | File path to media file.
  lpMediaFilePlayback | Playback settings to pause, seek and preprocess audio. If BearWare.AudioPreprocessorType.SPEEXDSP_AUDIOPREPROCESSOR then the echo cancellation part of BearWare.SpeexDSP is unused. Only denoise and AGC settings are applied.
  lpVideoCodec | If video file then specify output codec properties here. Specify BearWare.Codec .NO_CODEC if video should be ignored.

See also
  TeamTalkBase.UpdateStreamingMediaFileToChannel()
  TeamTalkBase.StopStreamingMediaFileToChannel()
  TeamTalkBase.InitLocalPlayback()

Definition at line 5956 of file TeamTalk.cs.

## ◆ UpdateStreamingMediaFileToChannel()

bool BearWare.TeamTalkBase.UpdateStreamingMediaFileToChannel | ( | MediaFilePlayback | lpMediaFilePlayback,
|  | VideoCodec | lpVideoCodec )

Update active media file being streamed to channel.

While streaming a media file to a channel it's possible to pause, seek and manipulate audio preprocessing by passing new BearWare.MediaFilePlayback properties.

Parameters

  lpMediaFilePlayback | Playback settings to pause, seek and preprocess audio. If BearWare.AudioPreprocessorType.SPEEXDSP_AUDIOPREPROCESSOR then the echo cancellation part of BearWare.SpeexDSP is unused. Only denoise and AGC settings are applied.
  lpVideoCodec | If video file then specify output codec properties here, otherwise NULL.

See also
  TeamTalkBase.StartStreamingMediaFileToChannel()
  TeamTalkBase.StopStreamingMediaFileToChannel()

Definition at line 5981 of file TeamTalk.cs.

## ◆ StopStreamingMediaFileToChannel()

bool BearWare.TeamTalkBase.StopStreamingMediaFileToChannel | ( |  | ) |

Stop streaming media file to channel.

This will clear the flags BearWare.ClientFlag.CLIENT_STREAM_AUDIO and/or BearWare.ClientFlag.CLIENT_STREAM_VIDEO.

See also
  TeamTalkBase.StartStreamingMediaFileToChannel()

Definition at line 5994 of file TeamTalk.cs.

## ◆ InitLocalPlayback()

int BearWare.TeamTalkBase.InitLocalPlayback | ( | string | szMediaFilePath,
|  | MediaFilePlayback | lpMediaFilePlayback )

Play media file using settings from BearWare.TeamTalkBase instance.

The sound system properties of the BearWare.TeamTalkBase instance will be used for playback, i.e. TeamTalkBase.SetSoundOutputMute(), TeamTalkBase.SetSoundOutputVolume() and TeamTalkBase.InitSoundOutputDevice().

Monitor progress of playback by checking for event #OnLocalMediaFile.

Parameters

  szMediaFilePath | Path to media file.
  lpMediaFilePlayback | Playback settings to pause, seek and preprocess audio. If BearWare.AudioPreprocessorType.SPEEXDSP_AUDIOPREPROCESSOR then the echo cancellation part of BearWare.SpeexDSP is unused. Only denoise and AGC settings are applied.

Returns
  A Session ID for identifing the media playback session. If Session ID is <= 0 indicates an error.
  A session ID identifier referred to as `nPlaybackSessionID`.

See also
  TeamTalkBase.UpdateLocalPlayback()
  TeamTalkBase.StopLocalPlayback()
  TeamTalkBase.StartStreamingMediaFileToChannel()

Definition at line 6023 of file TeamTalk.cs.

## ◆ UpdateLocalPlayback()

bool BearWare.TeamTalkBase.UpdateLocalPlayback | ( | int | nPlaybackSessionID,
|  | MediaFilePlayback | lpMediaFilePlayback )

Update media file currently being played by TeamTalk instance.

Parameters

  nPlaybackSessionID | Session ID created by TeamTalkBase.InitLocalPlayback().
  lpMediaFilePlayback | BearWare.AudioPreprocessorType of BearWare.AudioPreprocessor cannot be changed. It must be the same as used in TeamTalkBase.InitLocalPlayback().

See also
  TeamTalkBase.InitLocalPlayback()
  TeamTalkBase.StopLocalPlayback()
  TeamTalkBase.UpdateStreamingMediaFileToChannel()

Definition at line 6039 of file TeamTalk.cs.

## ◆ StopLocalPlayback()

bool BearWare.TeamTalkBase.StopLocalPlayback | ( | int | nPlaybackSessionID | ) |

Stop media file currently being played by TeamTalk instance.

Parameters

  nPlaybackSessionID | Session ID created by TeamTalkBase.InitLocalPlayback().

See also
  TeamTalkBase.InitLocalPlayback()
  TeamTalkBase.UpdateLocalPlayback()
  TeamTalkBase.StopStreamingMediaFileToChannel()

Definition at line 6053 of file TeamTalk.cs.

## ◆ GetMediaFileInfo()

static bool BearWare.TeamTalkBase.GetMediaFileInfo | ( | string | szMediaFilePath,
|  | ref MediaFileInfo | lpMediaFileInfo )

static

Get the properties of a media file.

Use this function to determine the audio and video properties of a media file, so the user knows what can be streamed.

See also
  TeamTalkBase.StartStreamingMediaFileToChannel()

Definition at line 6065 of file TeamTalk.cs.

## ◆ AcquireUserMediaVideoFrame()

VideoFrame BearWare.TeamTalkBase.AcquireUserMediaVideoFrame | ( | int | nUserID,
|  | out Bitmap | bmp )

Extract a user's media video frame for display.

The BearWare.VideoFrame extracted from the client instance will contain a pointer to the image's frame buffer, so a RGB32 bitmap can be displayed in a window control.

To release the acquired BearWare.VideoFrame call TeamTalkBase.ReleaseUserMediaVideoFrame().

A media video frame comes from a user's BearWare.StreamType.STREAMTYPE_MEDIAFILE_VIDEO.

Parameters

  nUserID | The user's ID. 0 for local user.
  bmp | A bitmap created from the BearWare.VideoFrame's data.

Returns
  Returns video frame which will contain the image data. Note that it's the frameBuffer member of BearWare.VideoFrame which will contain the image data allocated internally by TeamTalkBase. Returns NULL if no video frame could be acquired.

See also
  TeamTalkBase.ReleaseUserMediaVideoFrame()

Definition at line 6090 of file TeamTalk.cs.

## ◆ ReleaseUserMediaVideoFrame()

bool BearWare.TeamTalkBase.ReleaseUserMediaVideoFrame | ( | VideoFrame | lpVideoFrame | ) |

Delete a user's video frame, acquired through TeamTalkBase.AcquireUserMediaVideoFrame(), so its allocated resources can be released.

Parameters

  lpVideoFrame | Pointer to BearWare.VideoFrame which should be deallocated.

Returns
  Returns TRUE if a video frame was successfully deallocated.

See also
  AcquireUserMediaVideoFrame()

Definition at line 6112 of file TeamTalk.cs.

## Variable Documentation

## ◆ TT_MEDIAPLAYBACK_OFFSET_IGNORE

const uint BearWare.TeamTalkBase.TT_MEDIAPLAYBACK_OFFSET_IGNORE = 0xFFFFFFFF

static

Specify this value as uOffsetMSec in BearWare.MediaFilePlayback when calling BearWare.TeamTalkBase.InitLocalPlayback() and TeamTalkBase.UpdateLocalPlayback() to ignore rewind or forward.

Definition at line 4293 of file TeamTalk.cs.