overlay transparent animation over video with ffmpeg
Solution 1
The problem arises due to 64bit png.
Use this to solve the problem in method 1:
convert -size 1280x720 xc:transparent -background transparent \
-channel RGBA -fill '#0FF8' \
-draw 'polygon 200, 600, 200, 20, 600, 50, 600, 50' \
-fill '#0008' -draw 'polygon 200, 660, 200, 40, 660, 70, 660, 70' \
-fill '#fFF8' -draw 'polygon 200, 500, 200, 00, 500, 30, 500, 30' \
-channel RGBA -depth 8 -blur '10x5' test.png
Here I added -depth 8
to restrict the png to 32 bits rather than 64.
If you check the pngs you created, size of test.png is 318.8kb and that of cyan.png is 17.3kb. Also, testing with ffmpeg:
ffmpeg -i cyan.png
...
Input #0, png_pipe, from 'cyan.png':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: png, rgba, 1280x720 [SAR 72:72 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
But for the multiple overlay png it is:
ffmpeg -i test.png
...
Input #0, png_pipe, from 'test.png':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: png, rgba64be, 1280x720 [SAR 72:72 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
You see that the codecs are different- one is rgba64be
and the other is rgba
. The 64bit png may be a problem for ffmpeg for now.
So your flow becomes:
Step 1- create the overlay png.
convert -size 1280x720 xc:transparent -background transparent \
-channel RGBA -fill '#0FF8' \
-draw 'polygon 200, 600, 200, 20, 600, 50, 600, 50' -fill '#0008' \
-draw 'polygon 200, 660, 200, 40, 660, 70, 660, 70' -fill '#fFF8' \
-draw 'polygon 200, 500, 200, 00, 500, 30, 500, 30' -channel RGBA \
-depth 8 -blur '10x5' test.png
Step 2- create the background image.
convert -size 1280x720 xc:yellow -background yellow -channel RGBA gnd.png
Step 3- create the overlay movie.
ffmpeg -loop 1 -i test.png -t 1 -pix_fmt argb -vcodec qtrle z.mov
Step 4- create the background movie.
ffmpeg -loop 1 -i gnd.png -t 1 -pix_fmt argb -vcodec qtrle gnd.mov
Step 5 - overlay the overlay movie.
ffmpeg -vcodec qtrle -i gnd.mov -vcodec qtrle -i z.mov \
-filter_complex "[0:0][1:0]overlay=format=rgb[out]" -shortest \
-map [out] -vcodec qtrle test.mov
The movie should be fine now.
However I would also suggest that it is possible to skip the creation of an overlay movie. Just use:
ffmpeg -i gnd.mov -i test.png \
-filter_complex "[0:0][1:0]overlay=format=rgb[out]" \
-map [out] -vcodec qtrle test.mov
Solution 2
Seems like ffmpeg can't very well handle overlay of blurred semi-transparent primitives of different color.
Workaround I've come up with:
- Create several videos. One for each color you need.
- Overlay them over background video sequentialy.
To illustrate this let's create image with 3 overlayed triangles of different color. And an image with solid red background.
convert -size 1280x720 xc:transparent -background transparent -channel RGBA -fill '#0FF8' -draw 'polygon 200, 600, 200, 20, 600, 50, 600, 50' -fill '#0008' -draw 'polygon 200, 660, 200, 40, 660, 70, 660, 70' -fill '#fFF8' -draw 'polygon 200, 500, 200, 00, 500, 30, 500, 30' -channel RGBA -blur '10x5' test.png
convert -size 1280x720 xc:yellow -background yellow -channel RGBA gnd.png
Now we create two 1 sec movies from each and overlay them
ffmpeg -loop 1 -i test.png -t 1 -pix_fmt argb -vcodec qtrle z.mov
ffmpeg -loop 1 -i gnd.png -t 1 -pix_fmt argb -vcodec qtrle gnd.mov
ffmpeg -vcodec qtrle -i gnd.mov -vcodec qtrle -i z.mov -filter_complex "[0:0][1:0]overlay[out]" -shortest -map [out] -vcodec qtrle -pix_fmt argb test.mov
here's a frame from poor quality overlay we've got:
Lets create three different videos for each color
convert -size 1280x720 xc:transparent -background transparent -channel RGBA -fill '#0FF8' -draw 'polygon 200, 600, 200, 20, 600, 50, 600, 50' -channel RGBA -blur '10x5' cyan.png
convert -size 1280x720 xc:transparent -background transparent -channel RGBA -fill '#0008' -draw 'polygon 200, 660, 200, 40, 660, 70, 660, 70' -channel RGBA -blur '10x5' black.png
convert -size 1280x720 xc:transparent -background transparent -channel RGBA -fill '#fFF8' -draw 'polygon 200, 500, 200, 00, 500, 30, 500, 30' -channel RGBA -blur '10x5' white.png
convert -size 1280x720 xc:red gnd.png
ffmpeg -loop 1 -i cyan.png -t 1 -pix_fmt argb -vcodec qtrle cyan.mov
ffmpeg -loop 1 -i white.png -t 1 -pix_fmt argb -vcodec qtrle white.mov
ffmpeg -loop 1 -i black.png -t 1 -pix_fmt argb -vcodec qtrle black.mov
ffmpeg -loop 1 -i gnd.png -t 1 -pix_fmt argb -vcodec qtrle gnd.mov
And overlay them one by one over our background video
ffmpeg -i gnd.mov -i cyan.mov -i white.mov -i black.mov -filter_complex "[0:0][2:0]overlay[tmp1]; [tmp1][3:0]overlay[tmp2]; [tmp2][1:0]overlay[out]" -shortest -map [out] -vcodec qtrle -pix_fmt argb good.mov
What we've got is a way better picture.
Important note is that overlay sequence matter a lot here!
Related videos on Youtube
Adrian
Updated on September 18, 2022Comments
-
Adrian over 1 year
Overall task is to overlay animated infographics over video.
What I would like as a result shown in this video http://www.youtube.com/watch?v=ZhMF3WD9pr0
Nice animated semi-transparent cyan line on 00:08-00:11
Figured out how to do it by overlaying images one by one with "convert" from ImageMagick. Works fine but it's slow.
Tried to create and overlay video with transparency according to answers in this thread stackoverflow.com/questions/644684/turn-image-sequence-into-video-with-transparency
and some improvisations as well like:
ffmpeg -loop 1 -i ./frames/0253.png -r 30 -t 3 -pix_fmt rgba -vcodec png frame.mov
then create video with alpha channel from animated pics
ffmpeg -pattern_type glob -i 'angle/*.png' -r 30 -pix_fmt rgba -vcodec png z.mov
And overlay videos
ffmpeg -i frame.mov -i z.mov -filter_complex "[0:0][1:0]overlay[out]" -shortest -map [out] -pix_fmt rgba -vcodec png test.mov
But it all results in rough pixelized picture
Would appreciate some hints on what am I missing here and what else could I do...
Full ffmpeg output:
alexandrov@ThinkPad-Edge:~/Documents/training 20150109/edit$ ffmpeg -loop 1 -i ./frames/0253.png -r 30 -t 3 -pix_fmt rgba -vcodec png frame.mov >> log.txt ffmpeg version 2.5.git Copyright (c) 2000-2015 the FFmpeg developers built on Jan 11 2015 19:12:34 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) configuration: --prefix=/home/alexandrov/ffmpeg_build --extra-cflags=-I/home/alexandrov/ffmpeg_build/include --extra-ldflags=-L/home/alexandrov/ffmpeg_build/lib --bindir=/home/alexandrov/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab libavutil 54. 16.100 / 54. 16.100 libavcodec 56. 20.100 / 56. 20.100 libavformat 56. 18.100 / 56. 18.100 libavdevice 56. 3.100 / 56. 3.100 libavfilter 5. 7.100 / 5. 7.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, png_pipe, from './frames/0253.png': Duration: N/A, bitrate: N/A Stream #0:0: Video: png, rgb24, 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc File 'frame.mov' already exists. Overwrite ? [y/N] y Output #0, mov, to 'frame.mov': Metadata: encoder : Lavf56.18.100 Stream #0:0: Video: png (png / 0x20676E70), rgba, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 30 fps, 15360 tbn, 30 tbc Metadata: encoder : Lavc56.20.100 png Stream mapping: Stream #0:0 -> #0:0 (png (native) -> png (native)) Press [q] to stop, [?] for help frame= 5 fps=0.0 q=0.0 size= 5321kB time=00:00:00.10 bitrate=435924 frame= 7 fps=6.6 q=0.0 size= 8869kB time=00:00:00.16 bitrate=435922 frame= 11 fps=5.9 q=0.0 size= 15964kB time=00:00:00.30 bitrate=435922 frame= 13 fps=5.4 q=0.0 size= 19512kB time=00:00:00.36 bitrate=435922 frame= 17 fps=5.5 q=0.0 size= 26607kB time=00:00:00.50 bitrate=435922 frame= 19 fps=5.1 q=0.0 size= 30154kB time=00:00:00.56 bitrate=435921 frame= 23 fps=5.3 q=0.0 size= 37249kB time=00:00:00.70 bitrate=435922 frame= 25 fps=5.0 q=0.0 size= 40797kB time=00:00:00.76 bitrate=435921 frame= 29 fps=5.1 q=0.0 size= 47892kB time=00:00:00.90 bitrate=435921 frame= 31 fps=4.9 q=0.0 size= 51439kB time=00:00:00.96 bitrate=435921 frame= 35 fps=4.9 q=0.0 size= 58534kB time=00:00:01.10 bitrate=435921 frame= 37 fps=4.9 q=0.0 size= 62082kB time=00:00:01.16 bitrate=435921 frame= 41 fps=4.9 q=0.0 size= 69177kB time=00:00:01.30 bitrate=435921 frame= 43 fps=4.8 q=0.0 size= 72725kB time=00:00:01.36 bitrate=435921 frame= 47 fps=4.9 q=0.0 size= 79820kB time=00:00:01.50 bitrate=435921 frame= 49 fps=4.7 q=0.0 size= 83367kB time=00:00:01.56 bitrate=435921 frame= 53 fps=4.9 q=0.0 size= 90462kB time=00:00:01.70 bitrate=435921 frame= 55 fps=4.7 q=0.0 size= 94010kB time=00:00:01.76 bitrate=435921 frame= 60 fps=4.8 q=0.0 size= 102879kB time=00:00:01.93 bitrate=435921 frame= 63 fps=4.7 q=0.0 size= 108200kB time=00:00:02.03 bitrate=435921 frame= 66 fps=4.7 q=0.0 size= 113521kB time=00:00:02.13 bitrate=435921 frame= 69 fps=4.7 q=0.0 size= 118843kB time=00:00:02.23 bitrate=435921 frame= 73 fps=4.7 q=0.0 size= 125938kB time=00:00:02.36 bitrate=435921 frame= 78 fps=4.7 q=0.0 size= 134807kB time=00:00:02.53 bitrate=435921 frame= 81 fps=4.7 q=0.0 size= 140128kB time=00:00:02.63 bitrate=435921 frame= 84 fps=4.7 q=0.0 size= 145449kB time=00:00:02.73 bitrate=435921 frame= 87 fps=4.7 q=0.0 size= 150770kB time=00:00:02.83 bitrate=435921 frame= 90 fps=4.7 q=0.0 size= 156092kB time=00:00:02.93 bitrate=435921 frame= 90 fps=4.6 q=0.0 Lsize= 159640kB time=00:00:03.00 bitrate=435924.5kbits/s dup=15 drop=0 video:159639kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000662% alexandrov@ThinkPad-Edge:~/Documents/training 20150109/edit$ ffmpeg -pattern_type glob -i 'angle/*.png' -r 30 -pix_fmt rgba -vcodec png z.mov >> log.txt ffmpeg version 2.5.git Copyright (c) 2000-2015 the FFmpeg developers built on Jan 11 2015 19:12:34 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) configuration: --prefix=/home/alexandrov/ffmpeg_build --extra-cflags=-I/home/alexandrov/ffmpeg_build/include --extra-ldflags=-L/home/alexandrov/ffmpeg_build/lib --bindir=/home/alexandrov/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab libavutil 54. 16.100 / 54. 16.100 libavcodec 56. 20.100 / 56. 20.100 libavformat 56. 18.100 / 56. 18.100 libavdevice 56. 3.100 / 56. 3.100 libavfilter 5. 7.100 / 5. 7.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, image2, from 'angle/*.png': Duration: 00:00:03.24, start: 0.000000, bitrate: N/A Stream #0:0: Video: png, rgba64be, 1280x720 [SAR 72:72 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc File 'z.mov' already exists. Overwrite ? [y/N] y Output #0, mov, to 'z.mov': Metadata: encoder : Lavf56.18.100 Stream #0:0: Video: png (png / 0x20676E70), rgba, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 30 fps, 15360 tbn, 30 tbc Metadata: encoder : Lavc56.20.100 png Stream mapping: Stream #0:0 -> #0:0 (png (native) -> png (native)) Press [q] to stop, [?] for help frame= 6 fps=0.0 q=0.0 size= 363kB time=00:00:00.13 bitrate=22310. frame= 12 fps= 11 q=0.0 size= 1105kB time=00:00:00.33 bitrate=27156. frame= 18 fps= 11 q=0.0 size= 1803kB time=00:00:00.53 bitrate=27698. frame= 24 fps= 10 q=0.0 size= 2576kB time=00:00:00.73 bitrate=28777. frame= 30 fps= 10 q=0.0 size= 3282kB time=00:00:00.93 bitrate=28809. frame= 36 fps= 10 q=0.0 size= 4100kB time=00:00:01.13 bitrate=29634. frame= 42 fps= 10 q=0.0 size= 4829kB time=00:00:01.33 bitrate=29672. frame= 48 fps= 10 q=0.0 size= 5586kB time=00:00:01.53 bitrate=29844. frame= 54 fps= 10 q=0.0 size= 6441kB time=00:00:01.73 bitrate=30443. frame= 59 fps= 10 q=0.0 size= 7154kB time=00:00:01.90 bitrate=30846. frame= 65 fps= 10 q=0.0 size= 8010kB time=00:00:02.10 bitrate=31244. frame= 69 fps= 10 q=0.0 size= 8580kB time=00:00:02.23 bitrate=31471. frame= 75 fps= 10 q=0.0 size= 9435kB time=00:00:02.43 bitrate=31763. frame= 81 fps= 10 q=0.0 size= 10290kB time=00:00:02.63 bitrate=32012. frame= 87 fps= 10 q=0.0 size= 11146kB time=00:00:02.83 bitrate=32225. frame= 93 fps= 10 q=0.0 size= 12001kB time=00:00:03.03 bitrate=32410. frame= 97 fps= 10 q=0.0 Lsize= 12857kB time=00:00:03.23 bitrate=32575.6kbits/s dup=16 drop=0 video:12856kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.009313% alexandrov@ThinkPad-Edge:~/Documents/training 20150109/edit$ ffmpeg -i frame.mov -i z.mov -filter_complex "[0:0][1:0]overlay[out]" -shortest -map [out] -pix_fmt rgba -vcodec png test.mov >> log.txt ffmpeg version 2.5.git Copyright (c) 2000-2015 the FFmpeg developers built on Jan 11 2015 19:12:34 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) configuration: --prefix=/home/alexandrov/ffmpeg_build --extra-cflags=-I/home/alexandrov/ffmpeg_build/include --extra-ldflags=-L/home/alexandrov/ffmpeg_build/lib --bindir=/home/alexandrov/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab libavutil 54. 16.100 / 54. 16.100 libavcodec 56. 20.100 / 56. 20.100 libavformat 56. 18.100 / 56. 18.100 libavdevice 56. 3.100 / 56. 3.100 libavfilter 5. 7.100 / 5. 7.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'frame.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf56.18.100 Duration: 00:00:03.00, start: 0.000000, bitrate: 435924 kb/s Stream #0:0(eng): Video: png (png / 0x20676E70), rgba, 1280x720 [SAR 1:1 DAR 16:9], 435921 kb/s, 30 fps, 30 tbr, 15360 tbn, 15360 tbc (default) Metadata: handler_name : DataHandler encoder : Lavc56.20.100 png Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'z.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf56.18.100 Duration: 00:00:03.23, start: 0.000000, bitrate: 32568 kb/s Stream #1:0(eng): Video: png (png / 0x20676E70), rgba, 1280x720 [SAR 1:1 DAR 16:9], 32572 kb/s, 30 fps, 30 tbr, 15360 tbn, 15360 tbc (default) Metadata: handler_name : DataHandler encoder : Lavc56.20.100 png Output #0, mov, to 'test.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf56.18.100 Stream #0:0: Video: png (png / 0x20676E70), rgba, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 30 fps, 15360 tbn, 30 tbc (default) Metadata: encoder : Lavc56.20.100 png Stream mapping: Stream #0:0 (png) -> overlay:main Stream #1:0 (png) -> overlay:overlay overlay -> Stream #0:0 (png) Press [q] to stop, [?] for help frame= 3 fps=0.0 q=0.0 size= 1717kB time=00:00:00.03 bitrate=421888 frame= 5 fps=3.8 q=0.0 size= 5212kB time=00:00:00.10 bitrate=427001 frame= 7 fps=3.7 q=0.0 size= 8720kB time=00:00:00.16 bitrate=428613 frame= 8 fps=3.3 q=0.0 size= 10475kB time=00:00:00.20 bitrate=429061 frame= 11 fps=3.7 q=0.0 size= 15746kB time=00:00:00.30 bitrate=429972 frame= 13 fps=3.7 q=0.0 size= 19264kB time=00:00:00.36 bitrate=430381 frame= 13 fps=3.2 q=0.0 size= 19264kB time=00:00:00.36 bitrate=430381 frame= 15 fps=3.1 q=0.0 size= 22781kB time=00:00:00.43 bitrate=430672 frame= 17 fps=3.1 q=0.0 size= 26297kB time=00:00:00.50 bitrate=430857 frame= 19 fps=3.0 q=0.0 size= 29814kB time=00:00:00.56 bitrate=431000 frame= 21 fps=3.1 q=0.0 size= 33331kB time=00:00:00.63 bitrate=431122 frame= 23 fps=3.1 q=0.0 size= 36848kB time=00:00:00.70 bitrate=431228 frame= 25 fps=3.1 q=0.0 size= 40367kB time=00:00:00.76 bitrate=431328 frame= 27 fps=3.2 q=0.0 size= 43884kB time=00:00:00.83 bitrate=431399 frame= 29 fps=3.2 q=0.0 size= 47402kB time=00:00:00.90 bitrate=431466 frame= 31 fps=3.2 q=0.0 size= 50923kB time=00:00:00.96 bitrate=431548 frame= 33 fps=3.2 q=0.0 size= 54449kB time=00:00:01.03 bitrate=431655 frame= 36 fps=3.3 q=0.0 size= 59741kB time=00:00:01.13 bitrate=431822 frame= 38 fps=3.3 q=0.0 size= 63267kB time=00:00:01.20 bitrate=431903 frame= 40 fps=3.3 q=0.0 size= 66794kB time=00:00:01.26 bitrate=431981 frame= 43 fps=3.3 q=0.0 size= 72080kB time=00:00:01.36 bitrate=432055 frame= 46 fps=3.4 q=0.0 size= 77365kB time=00:00:01.46 bitrate=432117 frame= 48 fps=3.4 q=0.0 size= 80889kB time=00:00:01.53 bitrate=432159 frame= 50 fps=3.4 q=0.0 size= 84414kB time=00:00:01.60 bitrate=432197 frame= 53 fps=3.5 q=0.0 size= 89700kB time=00:00:01.70 bitrate=432248 frame= 55 fps=3.4 q=0.0 size= 93224kB time=00:00:01.76 bitrate=432279 frame= 57 fps=3.4 q=0.0 size= 96749kB time=00:00:01.83 bitrate=432308 frame= 58 fps=3.3 q=0.0 size= 98511kB time=00:00:01.86 bitrate=432322 frame= 60 fps=3.4 q=0.0 size= 102035kB time=00:00:01.93 bitrate=432348 frame= 63 fps=3.4 q=0.0 size= 107322kB time=00:00:02.03 bitrate=432383 frame= 64 fps=3.4 q=0.0 size= 109084kB time=00:00:02.06 bitrate=432394 frame= 66 fps=3.4 q=0.0 size= 112608kB time=00:00:02.13 bitrate=432415 frame= 69 fps=3.4 q=0.0 size= 117895kB time=00:00:02.23 bitrate=432445 frame= 71 fps=3.4 q=0.0 size= 121419kB time=00:00:02.30 bitrate=432463 frame= 73 fps=3.4 q=0.0 size= 124943kB time=00:00:02.36 bitrate=432480 frame= 75 fps=3.4 q=0.0 size= 128468kB time=00:00:02.43 bitrate=432496 frame= 77 fps=3.4 q=0.0 size= 131992kB time=00:00:02.50 bitrate=432511 frame= 79 fps=3.4 q=0.0 size= 135516kB time=00:00:02.56 bitrate=432526 frame= 81 fps=3.4 q=0.0 size= 139041kB time=00:00:02.63 bitrate=432540 frame= 83 fps=3.4 q=0.0 size= 142565kB time=00:00:02.70 bitrate=432553 frame= 85 fps=3.4 q=0.0 size= 146089kB time=00:00:02.76 bitrate=432565 frame= 87 fps=3.4 q=0.0 size= 149614kB time=00:00:02.83 bitrate=432577 frame= 89 fps=3.4 q=0.0 size= 153138kB time=00:00:02.90 bitrate=432588 frame= 91 fps=3.4 q=0.0 size= 156663kB time=00:00:02.96 bitrate=432599 frame= 91 fps=3.3 q=0.0 Lsize= 160188kB time=00:00:03.03 bitrate=432613.9kbits/s dup=0 drop=6 video:160187kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000884% alexandrov@ThinkPad-Edge:~/Documents/training 20150109/edit$
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Adrian over 9 yearsquality on real video is still not perfect but way better than initial attempts i62.tinypic.com/xe4eoz.png
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user3359503 over 9 yearsPlease use StackExchange to host images, rather than external links. Thanks!
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Rajib over 9 yearsCould you explain further? I understood your original question to have only 1 overlay. Are you saying the problem happens only when there are multiple overlays?
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Elisa Cha Cha over 9 yearsBy default the overlay filter will output yuv420, so when working with RGB you can add the overlay format option such as
overlay=format=rgb
to avoid any issues caused by the RGB to YUV conversion. -
Adrian over 9 years"-depth 8" worked like a charm! Overlaying direct png image surely works way better and if the point is to overlay static picture it's best solution to stick with. I was struggling with some animation here so it was not an option. Frame by frame overlay or video on video. First was slow and with second issues described in this question I was stuck into.
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Adrian over 9 years@Rajib problem was detected when single overlay video had two or more overlayed primitives with transparency. In case shown in initial question there are cyan base lines and text and black and white copy of it shifted by several pixels to add some shape effect to them. It is best visible with text. there're black border on the right and white on the left. With lines there is workaround just drawing them another way so the white, cyan and black don't overlay. But with text they would've overlay anyway. Also overlaying video was important cause the point was displaying moving lines not static.