[FFmpeg-trac] #7947(avfilter:new): Feature request: expose more frame properties as variables in drawtext filter
FFmpeg
trac at avcodec.org
Fri Jun 7 23:11:09 EEST 2019
#7947: Feature request: expose more frame properties as variables in drawtext
filter
-------------------------------------+-------------------------------------
Reporter: | Owner:
electron.rotoscope |
Type: enhancement | Status: new
Priority: normal | Component: avfilter
Version: unspecified | Resolution:
Keywords: drawtext | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by electron.rotoscope):
documentation (with a typo fix and clarification on the expansion keyword
"metadata") written not as nicely by me
{{{
doc/filters.texi
@@ -8960,7 +8960,20
@item x
@item y
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 1 character description of the current packet's input picture type.
+
+ @item pkt_pos
+ the current packet's position in the input datastream (in bytes from the
head of the source file)
+
+ @item pkt_duration
+ the current packet's input duration
+
+ @item pkt_size
+ the current packet's input size (in bytes)
@end table
@@ -9027,7 + 9027,10
@item metadata
Frame metadata. Takes one or two arguments.
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.
+
+ The metadata accessible to this function must show up using
+ @code{ffprobe -show_packets} formatted as
TAG:[metadata_key]=[metadata_value].
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7947#comment:2>
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