> On Jun 28, 2015, at 11:07 AM, Paul B Mahol <one...@gmail.com> wrote: > > On 6/28/15, Dave Rice <d...@dericed.com> wrote: >> Hi, >> >>> On Jun 27, 2015, at 4:52 PM, Paul B Mahol <one...@gmail.com> wrote: >>> >>> Signed-off-by: Paul B Mahol <one...@gmail.com> >>> --- >>> doc/filters.texi | 76 ++++++++++++ >>> libavfilter/Makefile | 1 + >>> libavfilter/allfilters.c | 1 + >>> libavfilter/vf_drawgraph.c | 297 >>> +++++++++++++++++++++++++++++++++++++++++++++ >>> 4 files changed, 375 insertions(+) >>> create mode 100644 libavfilter/vf_drawgraph.c >>> > > [...] > >> >> With this version using a color name for foreground no longer works: >> >> This works: >> ffplay -f lavfi -i mandelbrot -vf >> signalstats,drawgraph=metadata=lavfi.signalstats.YAVG:min=0:max=255:slide=scroll:bg=green:fg=0x0000FF >> >> This doesn't: >> ffplay -f lavfi -i mandelbrot -vf >> signalstats,drawgraph=metadata=lavfi.signalstats.YAVG:min=0:max=255:slide=scroll:bg=green:fg=red > > AFAIK The expressions can not work with strings. > >> >> Also here's an example with blend: >> ffplay -f lavfi -i mandelbrot -vf "signalstats,split=3[a][b][c];\ >> [a]drawgraph=metadata=lavfi.signalstats.YAVG:min=0:max=255:slide=scroll:fg=0xFFFF0000:mode=dot[a1];\ >> [b]drawgraph=metadata=lavfi.signalstats.UAVG:min=0:max=255:slide=scroll:fg=0xFF00FF00:mode=dot[b1];\ >> [c]drawgraph=metadata=lavfi.signalstats.VAVG:min=0:max=255:slide=scroll:fg=0xFFFFFF00:mode=dot[c1];\ >> [a1][b1]blend=and[ab];[ab][c1]blend=and[out]" >> > > The blending kills difference in colors so I may add multiple graphs > support for filter.
Setting the background to black and blending seems a little better, though I’m losing one of my graphs in this example. ./ffplay -f lavfi -i mandelbrot -vf "signalstats,split=3[a][b][c];\ [a]drawgraph=lavfi.signalstats.YAVG:min=0:max=255:slide=scroll:bg=black:fg=0x0000FF:mode=dot[a1];\ [b]drawgraph=lavfi.signalstats.YLOW:min=0:max=255:slide=scroll:bg=black:fg=0x00FF00:mode=dot[b1];\ [c]drawgraph=lavfi.signalstats.YHIGH:min=0:max=255:slide=scroll:bg=black:fg=0xFF0000:mode=dot[c1];\ [a1][b1]blend=lighten,[c1]blend=lighten[out]” Also the foreground expression is in ABGR or BGR. This is the opposite arrangement of what is specified here http://ffmpeg.org/ffmpeg-utils.html#Color. Best Regards, Dave Rice _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
