This file contains extensions to the standard set of parameter web constants./* constants for extractors */extern _IMPEXP_MEDIA const char * const B_DURATION;// Output only: Selects the duration of the stream.//// This is the playing time of the stream, which may be// different from some or all of the durations for the// individual streams. Return a negative number if the// duration is not a useful number. (like streaming audio)// This duration may be an estimate because determining// the exact duration may require parsing an entire file.// This duration may also be updated over time. For// example, a file being read may also be being written to// by someone else.extern _IMPEXP_MEDIA const char * const B_MEDIA_COPYRIGHT;// Output only: Selects the copyright notice of the stream.//// This is a string with a copyright notice. The// string belongs to the extractor, so don't delete// or change it.extern _IMPEXP_MEDIA const char * const B_MEDIA_TRACK_COUNT;// Output only: Selects the count of the// number of tracks in the stream.//// This is the current number of tracks in the stream.extern _IMPEXP_MEDIA const char * const B_MEDIA_FRAME_COUNT;// Output only: Selects the count of the// number of frames in the stream.//// This is the current number of frames in the stream.// See BMediaTrack::CountFrames()extern _IMPEXP_MEDIA const char * const B_MEDIA_CURRENT_FRAME_INDEX;// Output only: Selects the index of the// current frame in the stream.//// This is the current frame in the stream.// See BMediaTrack::CurrentFrame()extern _IMPEXP_MEDIA const char * const B_MEDIA_CURRENT_TIME;// Output only: Selects the current time of the stream.//// This is the time at the current position of the stream.// See BMediaTrack::CurrentTime()extern _IMPEXP_MEDIA const char * const B_MEDIA_ENCODED_FORMAT;// Output only: Selects the native encoded format of the streams data.//// See BMediaTrack::EncodedFormat()extern _IMPEXP_MEDIA const char * const B_MEDIA_TRACK_CODEC_INFO;// Output only: Selects the codec information for this stream//// See BMediaTrack::GetCodecInfo()extern _IMPEXP_MEDIA const char * const B_MEDIA_QUALITY;// Input/output: Selects the quality rating for this stream//// See BMediaTrack::GetQuality and BMediaTrack::SetQuality// Used for extractor-based seek:extern _IMPEXP_MEDIA const char * const B_MEDIA_SEEK_STREAM_NUMBER;// Input/Output: Selects the stream to be selected for seeking.//// When the extractor is asked to seek, it will seek on// this stream, and then seek the other streams depending// on where it ends up on the first stream. A typical// value for this corresponds to a video stream. In this// case the video stream will be seeked to the closest key// frame for example, and then any other streams will be// seeked to that time. Only 'open' streams will be// seeked.