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vbi_aspect_ratio Struct Reference
[Events]

Information about the picture aspect ratio and open subtitles. More...


Data Fields

int first_line
int last_line
double ratio
vbi_bool film_mode
vbi_subt open_subtitles


Detailed Description

Information about the picture aspect ratio and open subtitles.

This is available via VBI_EVENT_ASPECT.


Field Documentation

int vbi_aspect_ratio::first_line
 

first_line and last_line, inclusive, describe the bounds of active video, i. e. without the black bars in letterbox mode. These are first field line numbers according to the ITU-R line numbering scheme, see vbi_sliced. For example PAL 23 ... 310 (288 lines), NTSC 22 ... 262 (240 lines).

double vbi_aspect_ratio::ratio
 

The picture aspect ratio in anamorphic mode, 16/9 for example. Normal or letterboxed video has aspect ratio 1/1.

vbi_bool vbi_aspect_ratio::film_mode
 

TRUE when the source is known to be film transferred to video, as opposed to interlaced video from a video camera. (This is actually a helper flag for PALPlus decoders, but it may assist deinterlacers too.)

vbi_subt vbi_aspect_ratio::open_subtitles
 

Describes how subtitles are inserted into the picture, see vbi_subt for details.


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