On Thu, Mar 24, 2016 at 17:05:06 -0600, jd1008 wrote: > ffmpeg -i The_Previous_River_Trip.mp4 -s:v:1 1920x1080 -vcodec > mpeg1video -q:v 1 -y The_Previous_River_Trip.mp4
If you have only one video output, you are fine with just "-s 1920x1080". > warning, clipping 1 dct coefficients to -255..255:02:37.06 > bitrate=66271.0kbits/s > [mpeg1video @ 0xa618f00] warning, clipping 1 dct coefficients to -255..255 That has nothing to do with a "physical" clipping of the scale, this is a mathematical clipping in the mpeg1video encoder. (It may or may not lead to visual impact.) I haven't seen this for a while, but I can hardly recall when I used mpeg1video. ;-) I couldn't find a source for this info, but remember it from "way back when", that changing the macroblock decision algorithm may get rid of these warnings: Add "-mbd rd" as an output option. (I just tried, it works for me.) So replace [...] -s 1920x1080 -c:v mpeg1video -q:v 1 [...] with [...] -s 1920x1080 -c:v mpeg1video -q:v 1 -mbd rd [...] I can't guarantee though that you won't still get one or the other warning... Moritz _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
