mp4gettrackvideotype.3

完整的RTP RTSP代码库

.TH "MP4" "3" "Version 0.9" "Cisco Systems Inc." "MP4 File Format Library"
.SH "NAME"
.LP 
\fBMP4GetTrackVideoType\fR \- Get the encoding type of a video track
.SH "SYNTAX"
.LP 
#include <mp4.h>
.LP 
u_int8_t \fBMP4GetTrackVideoType\fR(
.br 
	MP4FileHandle \fIhFile\fP,
.br 
	MP4TrackId \fItrackId\fP
.br 
)
.SH "ARGUMENTS"
.LP 
.TP 
\fIhFile\fP
Specifies the mp4 file to which the operation applies.
.TP 
\fItrackId\fP
Specifies the track for which the video type is desired.
.SH "RETURN VALUES"
.LP 
Upon success, the video type of the track. Upon error, MP4_INVALID_VIDEO_TYPE is returned.
.SH "DESCRIPTION"
.LP 
\fBMP4GetTrackVideoType\fR returns the encoding type of the specified video track in the mp4 file.
.LP 
Known video encoding types are:
.LP 
MP4_MPEG1_VIDEO_TYPE	
.br 
	MPEG\-1 Video
.LP 
MP4_MPEG2_SIMPLE_VIDEO_TYPE	
.br 
	MPEG\-2 Simple Profile Video
.LP 
MP4_MPEG2_MAIN_VIDEO_TYPE
.br 
	MPEG\-2 Main Profile Video (Broadcast/DVD)
.LP 
MP4_MPEG2_SNR_VIDEO_TYPE	
.br 
	MPEG\-2 SNR Profile Video
.LP 
MP4_MPEG2_SPATIAL_VIDEO_TYPE 
.br 
	MPEG\-2 Spatial Scalability Profile Video
.LP 
MP4_MPEG2_HIGH_VIDEO_TYPE 
.br 
	MPEG\-2 High Profile Video (HDTV)
.LP 
MP4_MPEG2_442_VIDEO_TYPE 
.br 
	MPEG\-2 442 Profile Video (Studio)
.LP 
MP4_MPEG4_VIDEO_TYPE	
.br 
	MPEG\-4 Video
.LP 
MP4_JPEG_VIDEO_TYPE
.br 
	JPEG stills or motion JPEG
.LP 
MP4_PRIVATE_VIDEO_TYPE
.br 
	User private type
.SH "SEE ALSO"
.LP 
MP4(3) MP4AddVideoTrack(3)