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| author | Stefano Sabatini <stefasab@gmail.com> | 2013-12-23 18:24:57 +0100 |
|---|---|---|
| committer | Stefano Sabatini <stefasab@gmail.com> | 2013-12-25 18:25:53 +0100 |
| commit | 97aa554634044b84a498f41ac9bd88b688731c3b (patch) | |
| tree | 31ec381ccdd68888939b3e1655bb41fe167502b5 /doc | |
| parent | 7619a87cc8b9a1ac6ea6cf03b674f5a74b1ac90c (diff) | |
| download | ffmpeg-97aa554634044b84a498f41ac9bd88b688731c3b.tar.gz | |
lavfi/volume: implement process_command() callback, with the volume command
Address trac ticket #2868.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/filters.texi | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 548cb43801..a57996468f 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -1828,7 +1828,8 @@ Set when the volume expression is evaluated. It accepts the following values: @table @samp @item once -only evaluate expression once during the filter initialization +only evaluate expression once during the filter initialization, or +when the @samp{volume} command is sent @item frame evaluate expression for each incoming frame @@ -1870,6 +1871,18 @@ Note that when @option{eval} is set to @samp{once} only the @var{sample_rate} and @var{tb} variables are available, all other variables will evaluate to NAN. +@subsection Commands + +This filter supports the following commands: +@table @option +@item volume +Modify the volume expression. +The command accepts the same syntax of the corresponding option. + +If the specified expression is not valid, it is kept at its current +value. +@end table + @subsection Examples @itemize |