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 class	BearWare.MediaFileStatus : uint {   BearWare.MFS_CLOSED = 0 , BearWare.MFS_ERROR = 1 , BearWare.MFS_STARTED = 2 , BearWare.MFS_FINISHED = 3 ,   BearWare.MFS_ABORTED = 4 , BearWare.MFS_PAUSED = 5 , BearWare.MFS_PLAYING = 6 }
	Status of media file being written to disk. More...
enum class	BearWare.AudioFileFormat : uint {   BearWare.AFF_NONE = 0 , BearWare.AFF_CHANNELCODEC_FORMAT = 1 , BearWare.AFF_WAVE_FORMAT = 2 , BearWare.AFF_MP3_16KBIT_FORMAT = 3 ,   BearWare.AFF_MP3_32KBIT_FORMAT = 4 , BearWare.AFF_MP3_64KBIT_FORMAT = 5 , BearWare.AFF_MP3_128KBIT_FORMAT = 6 , BearWare.AFF_MP3_256KBIT_FORMAT = 7 }
	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. More...
bool	BearWare.TeamTalkBase.StartStreamingMediaFileToChannel (string szMediaFilePath, MediaFilePlayback lpMediaFilePlayback, VideoCodec lpVideoCodec)
	Stream media file to channel, e.g. avi-, wav- or MP3-file. More...
bool	BearWare.TeamTalkBase.UpdateStreamingMediaFileToChannel (MediaFilePlayback lpMediaFilePlayback, VideoCodec lpVideoCodec)
	Update active media file being streamed to channel. More...
bool	BearWare.TeamTalkBase.StopStreamingMediaFileToChannel ()
	Stop streaming media file to channel. More...
int	BearWare.TeamTalkBase.InitLocalPlayback (string szMediaFilePath, MediaFilePlayback lpMediaFilePlayback)
	Play media file using settings from TeamTalkBase instance. More...
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. More...
VideoFrame	BearWare.TeamTalkBase.AcquireUserMediaVideoFrame (int nUserID, out Bitmap bmp)
	Extract a user's media video frame for display. More...
bool	BearWare.TeamTalkBase.ReleaseUserMediaVideoFrame (VideoFrame lpVideoFrame)
	Delete a user's video frame, acquired through TeamTalkBase.AcquireUserMediaVideoFrame(), so its allocated resources can be released. More...

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

strong

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 518 of file TeamTalk.cs.

AudioFileFormat

enum BearWare.AudioFileFormat : uint

strong

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 AudioFileFormat.AFF_MP3_16KBIT_FORMAT
AFF_MP3_64KBIT_FORMAT	See also AudioFileFormat.AFF_MP3_16KBIT_FORMAT
AFF_MP3_128KBIT_FORMAT	See also AudioFileFormat.AFF_MP3_16KBIT_FORMAT
AFF_MP3_256KBIT_FORMAT	See also AudioFileFormat.AFF_MP3_16KBIT_FORMAT

Definition at line 539 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 5930 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 ClientEvent.CLIENTEVENT_STREAM_MEDIAFILE is posted when the media file starts streaming. The flags ClientFlag.CLIENT_STREAM_AUDIO and/or ClientFlag.CLIENT_STREAM_VIDEO will be set if the call is successful.

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

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

Parameters

szMediaFilePath	File path to media file.
lpMediaFilePlayback	Playback settings to pause, seek and preprocess audio. If 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 Codec .NO_CODEC if video should be ignored.

See also

TeamTalkBase.UpdateStreamingMediaFileToChannel()

TeamTalkBase.StopStreamingMediaFileToChannel()

TeamTalkBase.InitLocalPlayback()

Definition at line 5966 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 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 5991 of file TeamTalk.cs.

StopStreamingMediaFileToChannel()

bool BearWare.TeamTalkBase.StopStreamingMediaFileToChannel

(

)

Stop streaming media file to channel.

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

See also

TeamTalkBase.StartStreamingMediaFileToChannel()

Definition at line 6004 of file TeamTalk.cs.

InitLocalPlayback()

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

Play media file using settings from TeamTalkBase instance.

The sound system properties of the 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 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 6033 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 6049 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 6063 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 6075 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 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 6100 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 6122 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 4300 of file TeamTalk.cs.