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| author | Stefano Sabatini <stefasab@gmail.com> | 2012-12-12 00:21:26 +0100 |
|---|---|---|
| committer | Stefano Sabatini <stefasab@gmail.com> | 2012-12-13 00:16:30 +0100 |
| commit | 6ba1f280087d32ed71332211b1d9cc1b350f7e28 (patch) | |
| tree | 2c55c05eed58cd1a2f204a1f304def1934936184 /doc/filters.texi | |
| parent | c214cd18e2962202aea8388b217458a3fa7f9d99 (diff) | |
| download | ffmpeg-6ba1f280087d32ed71332211b1d9cc1b350f7e28.tar.gz | |
lavfi/select: add support to options
Add options introspection, and improve error feedback.
Diffstat (limited to 'doc/filters.texi')
| -rw-r--r-- | doc/filters.texi | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 67789001dd..76c694b35b 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -4637,9 +4637,14 @@ Below is a description of the currently available multimedia filters. @section aselect, select Select frames to pass in output. -It accepts in input an expression, which is evaluated for each input -frame. If the expression is evaluated to a non-zero value, the frame -is selected and passed to the output, otherwise it is discarded. +These filters accept a single option @option{expr} or @option{e} +specifying the select expression, which can be specified either by +specyfing @code{expr=VALUE} or specifying the expression +alone. + +The select expression is evaluated for each input frame. If the +evaluation result is a non-zero value, the frame is selected and +passed to the output, otherwise it is discarded. The expression can contain the following constants: |