mirror of https://git.ffmpeg.org/ffmpeg.git
doc/filters: drawtext additions and corrections
Document the pict_type constant. Clarify availability of metadata. Minor grammar fixes. Written with the help of Gyan and kepstin
This commit is contained in:
parent
a1a8815220
commit
18dab6175b
|
@ -8962,7 +8962,10 @@ the width of the rendered text
|
|||
the x and y offset coordinates where the text is drawn.
|
||||
|
||||
These parameters allow the @var{x} and @var{y} expressions to refer
|
||||
each other, so you can for example specify @code{y=x/dar}.
|
||||
to each other, so you can for example specify @code{y=x/dar}.
|
||||
|
||||
@item pict_type
|
||||
A one character description of the current frame's picture type.
|
||||
@end table
|
||||
|
||||
@anchor{drawtext_expansion}
|
||||
|
@ -9032,11 +9035,18 @@ The first argument is mandatory and specifies the metadata key.
|
|||
The second argument is optional and specifies a default value, used when the
|
||||
metadata key is not found or empty.
|
||||
|
||||
Available metadata can be identified by inspecting entries
|
||||
starting with TAG included within each frame section
|
||||
printed by running @code{ffprobe -show_frames}.
|
||||
|
||||
String metadata generated in filters leading to
|
||||
the drawtext filter are also available.
|
||||
|
||||
@item n, frame_num
|
||||
The frame number, starting from 0.
|
||||
|
||||
@item pict_type
|
||||
A 1 character description of the current picture type.
|
||||
A one character description of the current picture type.
|
||||
|
||||
@item pts
|
||||
The timestamp of the current frame.
|
||||
|
|
Loading…
Reference in New Issue