Hi, I'd like to submit the following patch adding a feature that I was missing and decided to try to implement myself.
The problem I had was that although the parameters of the lutyuv filter are all commands, there was no way to use sendcmd to generate the expressions for the parameters using time-dependent [expr] flag. So I added a [format] flag that indicates ARG is to be interpreted as a format string (printf-style) followed by arguments separated by commas (that require proper escaping for it to work), and used to generate the string that is eventually sent to the filter. This is currently limited to %f with optional width and precision. Tested to work with ARG as "gammaval(%.2f), 1-TI*.3", to make a gamma ramp over an interval of time. What do you think about it? Cheers, Ignacy Ignacy Gawędzki (1): avfilter/f_sendcmd: add format expressions libavfilter/f_sendcmd.c | 161 +++++++++++++++++++++++++++++++++++----- 1 file changed, 143 insertions(+), 18 deletions(-) -- 2.48.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
