[FFmpeg-user] Turning an image set into an FLV with transparent background

[Carl Eugen Hoyos]

Adam <doadam <at> gmail.com> writes:

> I tested with this command and received the same results:
> ffmpeg -r 24 -i HippoBingo_B_Render_%04d.png -i music.wav 
> -r 24 -ac 1 -vcodec flv -strict experimental -s 256x384 
> -ab 128k z.flv

(Complete, uncut console output missing.)

I am not sure I understand your original report but if 
your question is why the output file does not contain 
transparency information then the answer is that FFmpeg's 
flv encoder does not support transparency (or in FFmpeg 
speech: Does not support yuva420p colour space).

I am not sure if this is likely to get implemented but I 
created ticket #3022.

Carl Eugen