[FFmpeg-user] whats wrong with select between filter syntax

[Clément Bœsch]

On Fri, Jan 03, 2014 at 04:12:51PM -0500, Travis Kelley wrote:
> I can't seem to get the select filter to work properly on a gentoo linux
> system.  I've tried all combinations I can think of with quotes in
> different places, and I have other vf combinations working, including
> "select=1".  I'm trying to eventually construct a command that will allow
> me to select multiple segments to be included in the output file, but I'm
> struggling to get even a single select working.  Can anyone help?
> 
> # ffmpeg -i "input.mp4" -vf "select=between(t,10,20)" /tmp/output.mp4
> Missing ')' or too many args in 'between(t'
> [Parsed_select_0 @ 0x912870] Error while parsing expression 'between(t'
> [AVFilterGraph @ 0x9127d0] Error initializing filter 'select' with args
> 'between(t'
> 
> # ffmpeg -i "input.mp4" -vf "select=between(t\,10\,20)" /tmp/output.mp4

Note: you can do -vf "select='between(t,10,20)'"

> Unknown function in 'between(t,10,20)'
> [Parsed_select_0 @ 0x801150] Error while parsing expression
> 'between(t,10,20)'
> [AVFilterGraph @ 0x801b70] Error initializing filter 'select' with args
> 'between(t,10,20)'
> Error opening filters!
> 
> # ffmpeg -version
> ffmpeg version 1.0.7

This is way too old. It doesn't have between(). You can emulate with
"select='gt(t,10)*lt(t,20)'"

> built on Dec  5 2013 09:58:46 with gcc 4.7.3 (Gentoo 4.7.3-r1 p1.3,
> pie-0.5.5)

-- 
Clément B.
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