[FFmpeg-user] ~50% performance difference overlaying static image with png series using -vf/-filter_complex

[d-fens]

Zitat von Paul B Mahol <onemda at gmail.com>:

> On 8/23/13, d-fens <d-fens at 00010111.de> wrote:
>> Zitat von Paul B Mahol <onemda at gmail.com>:
>>
>>> On 8/22/13, d-fens <d-fens at 00010111.de> wrote:
>>>> hi,
>>>>
>>>> i have a background png and a sequence of pngs with transparency which
>>>> should overlay the background.
>>>>
>>>> when i use
>>>>
>>>> ./ffmpeg -i %04d.png -vf "movie=bg.png [bg]; [in] format=rgb32, split
>>>> [T1], fifo, [bg] overlay=0:0, [T2] overlay=0:0 [out]; [T1] fifo [T2]"
>>>> out.mp4
>>>>
>>>> (taken from
>>>> http://stackoverflow.com/questions/10438713/overlay-animated-images-with-transparency-over-a-static-background-image-using-f)
>>>> i get arround 13fps for fullHD images, but using
>>>>
>>>> ./ffmpeg -loop 1 -i bg.png -i %04d.png -filter_complex
>>>> overlay=shortest=1 out.mp4
>>>
>>> Try removing loop and shortest.
>>
>>
>> this just outputs one frame, so no success :(
>
> Than change order of streams - make bg.png 2nd.

well that puts the background over the sequence, its fast (15fps  
processing) though :| but very static ...