RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

lavfi: document assumptions about the input and output labels of a filter graph description

This commit is contained in:
Stefano Sabatini 2015-01-27 13:21:56 +01:00
parent d11fcf735f
commit af7b89e08b
2 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
doc/filters.texi
View File

@ -195,6 +195,10 @@ instance two input pads. The first output pad of split is labelled
output pad of split is linked to the second input pad of overlay, output pad of split is linked to the second input pad of overlay,
which are both unlabelled. which are both unlabelled.
In a filter description, if the input label of the first filter is not
specified, "in" is assumed; if the output label of the last filter is not
specified, "out" is assumed.
In a complete filterchain all the unlabelled filter input and output In a complete filterchain all the unlabelled filter input and output
pads must be connected. A filtergraph is considered valid if all the pads must be connected. A filtergraph is considered valid if all the
filter input and output pads of all the filterchains are connected. filter input and output pads of all the filterchains are connected.

4
libavfilter/avfilter.h
View File

@ -1419,6 +1419,10 @@ int avfilter_graph_parse(AVFilterGraph *graph, const char *filters,
/** /**
* Add a graph described by a string to a graph. * Add a graph described by a string to a graph.
* *
* In the graph filters description, if the input label of the first
* filter is not specified, "in" is assumed; if the output label of
* the last filter is not specified, "out" is assumed.
*
* @param graph the filter graph where to link the parsed graph context * @param graph the filter graph where to link the parsed graph context
* @param filters string to be parsed * @param filters string to be parsed
* @param inputs pointer to a linked list to the inputs of the graph, may be NULL. * @param inputs pointer to a linked list to the inputs of the graph, may be NULL.