Nicolas George george at nsup.org writes:
Le quintidi 25 messidor, an CCXXIII, Carl Eugen Hoyos a écrit :
I can confirm that there may be an issue
but it is not overlay-related:
$ ffmpeg -i input -vf
split[x][z];[x]format=gray[x1];[x1]nullsink
-strict -2 -vcodec jpeg2000 -ss 1 out1.avi
Sorry my poor english.
The format of the output of the overlay filter
is yuva420p. This is not supported by x264, so
the output format file-wise is yuv420p.
The output is visually gray because you
overlayed a gray frame (x1) over another
frame (of the same size).
Yes. This is right.
I
nicolab robelt2525 at gmail.com writes:
ffmpeg -f lavfi -i rgbtestsrc=d=10,format=yuv420p
-vcodec libx264 rgbtestsrc.mp4
This is visually rgb color[z] overlayed video.
ffmpeg -i rgbtestsrc.mp4 -vf
split[x][z];[x]format=gray[x1];[x1][z]overlay
-vcodec libx264 10.mp4
This is visually
Nicolas George george at nsup.org writes:
Le quintidi 25 messidor, an CCXXIII, Carl Eugen Hoyos a écrit :
I can confirm that there may be an issue
but it is not overlay-related:
$ ffmpeg -i input -vf
split[x][z];[x]format=gray[x1];[x1]nullsink
-strict -2 -vcodec jpeg2000 -ss 1
Using -ss seconds in fornt of inputfile, apply format filter and overlay
output is strange?
Creat rgbtestsrc video.
ffmpeg -f lavfi -i rgbtestsrc=d=10 -vcodec utvideo rgbtestsrc.avi
Overlay z output file is not change format before -ss input file.
This is OK.
ffmpeg -i rgbtestsrc.avi -ss 1 -vf
nicolab robelt2525 at gmail.com writes:
Output is gray format. This is OK.
^^
ffmpeg -i rgbtestsrc.avi -ss 1 -vf
split[x][z];[x]format=gray[x1];[z][x1]overlay
-vcodec libx264 3.mkv
The format of the output of the overlay filter
is yuva420p. This is not supported by
