Hello,
I'm attempting "mask" a time selection of a video using the split, select and delogo filters but I just can't seem to get my head around the split filter. Looking at the start of the example[1] at the start of the libav documentation it certainly appears that what I want to do is possible but I'm struggling to build the proper filter. For example I would like to mask the entire video of a 640x480 video from 0 - 10 seconds. Based on the example in the docs and this[2] stackoverflow posting I've tried things like: ./avconv -i input -vf "[in] split [T1], fifo, [T2] overlay [out]; [T1] fifo,select='gte(t,0)*lte(t,10)',delogo=x=0:y=0:w=640:h=480 [T2]" output Hoping that would do something like : input --> split --> fifo -----------------------------------------------------> overlay --> output | ^ | | +------> fifo --> select 0-10 seconds --> delogo --------+ But I'm either completely unable to get the command to run or when I do I don't get the desired results. Any help or suggestions for a more appropriate approach would be greatly appreciated. Thanks, Keith. 1: http://libav.org/libavfilter.html#Introduction 2: http://stackoverflow.com/questions/9429194/adding-a-color-filter-at-specific-intervals-in-ffmpeg
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