vf_drawtext filter text align does not allows set both horizontal and vertical align

[Ivan A. Shmakov]

Summary of the bug:

vf_drawtext filter text align does not allows set both horizontal and vertical align at same time

text_align=center - allows
text_align=middle - allows
text_align=C - allows
text_align=M - allows

text_align=center|middle - not allows
text_align=CM - not allows
text_align=C|M - not allows

And could you say what format should be correct - CM or С|M and center|middle?

How to reproduce:

% ./ffmpeg -y -i ./in.avi -vf "drawtext=text='My text starting at 640x360':x=(w-text_w)/2: y=(h-text_h-line_h)/2:fontsize=10:fontcolor=white:box=1:boxborderw=5:boxcolor=#00ff00:boxw=100:boxh=20:text_align=middle|center" -c:a copy output.mp4

ffmpeg version
built on master

Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker.

[Ivan A. Shmakov]

to set both verical and horizontal text align it's allows text_align=15

bit flags of:

enum text_alignment {

TA_LEFT = (1 << 0),
TA_RIGHT = (1 << 1),
TA_TOP = (1 << 2),
TA_BOTTOM = (1 << 3),

};

But I think it's required to set in text format too. By the way could you say what format should be correct - CM or С|M and center|middle?

[Elon Musk]

Options are flags, flags are set via +, so C+M+L+T

[Michael Koch]

Replying to Elon Musk:

Options are flags, flags are set via +, so C+M+L+T

That's missing in documentation.

[Elon Musk]

Only if you are too ignorant to search.