On 6/28/15, Paul B Mahol <one...@gmail.com> wrote: > On 6/28/15, Dave Rice <d...@dericed.com> wrote: >> >>> On Jun 28, 2015, at 1:54 PM, Paul B Mahol <one...@gmail.com> wrote: >>> >>> On 6/28/15, Dave Rice <d...@dericed.com> wrote: >>>> >>>>> 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. >>> >>> Using blend for this is SLOW. >> >> If the background could set to full alpha, then multiple graphs could be >> added together with the overlay filter. I tested some alpha expressions >> with >> bg (black@00, 0x00000000) and didn't seem to get transparent results. > > Because filter use gbrp without alpha as output format. Will change it. > Plan is use RGBA or even YUVA as final output.
Now it uses more friendly RGBA mode. > >> >>> Have you tried new 'line' mode? >> >> Oooo, this is great. Probably more readable than dot in many situations. >> >>> Also expressions allow changing color of dot/line/bar so try it and >>> tell me if its fine. >> >> I tested this with several modes and it works as expected (excepting that >> ABGR/BGR vs RGBA/RGB note). Thanks for adding this. >> >> Some other comments: >> I tried to use an equation within metadata but got no plotted result. For >> instance, "metadata=pow(lavfi.signalstats.YMIN\,2)". There are some >> values >> that may occur in a wide range, so a logarithmic or mathematically >> adjusted >> display may be preferable. > > Will see what can be done. This complicates filter a lot, and I think this is more suited for another filter which will just operate on metadata values. > >> >> Can input width and input height be used in variables within a size >> expression. In many cases I would like to draw the graph over the input >> video, but to do this I must know the input video size in advance. > > I do not understand what you want. You want to be able to set size of > filter to input video? This again complicates filter and disallows using WxH notation and named notations. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
