Hi. I am trying to use the 'select' filter with avconv to output a range
of images at intervals. The following command runs without errors using
latest ffmpeg from ffmpeg.org, but fails as below with latest avconv
from libav.org. (using statically compiled binary from
http://johnvansickle.com/libav/)
$ avconv -i in.mpg -vf "select='between(n,
8992,9289)+between(n,13554,13851)'",setpts='N/(29.97*TB)' -y %06d.png
avconv version da9bffa- http://johnvansickle.com/libav/ , Copyright
(c) 2000-2015 the Libav developers
built on Jan 22 2015 01:23:24 with gcc 4.9.2 (Debian 4.9.2-10)
[mpeg @ 0x3399260] max_analyze_duration 5000000 reached
Input #0, mpeg, from
'/srv/media/video/House.S08E06.HDTV.XviD-LOL.avi.enc.mpg':
Duration: 00:43:52.70, start: 0.133467, bitrate: 1693 kb/s
Stream #0:0[0x1e0]: Video: mpeg2video (Main)
yuv420p, tv, smpte170m/smpte170m/smpte170m
720x480 [PAR 32:27 DAR 16:9], 5400 kb/s
29.97 fps, 90k tbn, 59.94 tbc
Stream #0:1[0x80]: Audio: ac3
48000 Hz, stereo, fltp, 224 kb/s
[select @ 0x33a03a0] [Eval @ 0x7fff570cdec0] Missing ')' or too many
args in 'between(n,8992,9289)+between(n,13554,13851)'
[select @ 0x33a03a0] Error while parsing expression 'between(n,
8992,9289)+between(n,13554,13851)'
[AVFilterGraph @ 0x339be00] Error initializing filter 'select' with args
'between(n, 8992,9289)+between(n,13554,13851)'
Error opening filters!
What can I do to make this filter work with avconv ?
cheers,
Robert
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