Hi Moritz, thanks for the reply.
Using -r for the frame rate is just a simple example to check if expr: is working or not. By the way, it should be expr:, not exp: but that does not change anything for my example or output. When using max(), I still get: Invalid framerate value: expr:max(25,30) ffmpeg simply doesn't recognize any expr: on the command line!! I got the same problem with version 2.6.3 from June 2015: ffmpeg version N-36084-g993c84e-xuggle-5.5 built on Jun 11 2015 13:08:14 with gcc 4.4.7 20120313 (Red Hat 4.4.7-11) The version that worked before was 1.2.1. But maybe it has something to do with my compilation of ffmpeg? This is what I used as config options: ./configure --enable-librtmp --enable-libx264 --enable-gpl 2015-09-03 10:54 GMT+02:00 Moritz Barsnick <barsn...@gmx.net>: > Hi Frans, > > On Thu, Sep 03, 2015 at 10:36:32 +0200, Frans Gouverne wrote: > > since I recompiled ffmpeg some months ago, I cannot use expressions on > the > > command line anymore, they are simply not recognized. For example: > > > > ffmpeg -re -i demo.mp4 -ac 2 -b:a 64k -ar 44100 -c:v libx264 -r > > exp:gt(25,30) -f mp4 output.mp4 > > > > Invalid framerate value: exp:gt(25,30) > > a) I can successfully use expressions for "-r" if I omit the "exp:" > part. (That may have changed over the months, I don't know.) > > b) gt(25,30) won't work with "-r", as "-r" doesn't accept "0"! > From the docs: > ‘gt(x, y)’ > Return 1 if x is greater than y, 0 otherwise. > Are you looking for "max(25,30)"? > > > built on Jan 19 2013 20:36:06 with gcc 4.7.2 (GCC) > > Did you say "some months ago"?? 32 months! How old was the ffmpeg you > were using before? > > Moritz > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > -- Gouverne Web Design Colenso 125 3761GL Soest Tel: 035-6015569 Mobiel: 06-11408032 KvK: 32108255 _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user