#11610: scale with reference prevents video to be scaled with a second scale
filter
instance
-------------------------------------+-------------------------------------
Reporter: Alexander | Type: defect
Status: new | Priority: normal
Component: swscale | Version: 7.1
Keywords: scale | Blocked By:
scale2ref |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
== Summary of the bug:
A user needs to overlay a logo which is scaled using a reference video as
input. The reference video should be also scaled in the same command.
**Result:** Scale filter fails to scale a video that is used as input for
the reference.
**Tests:** Logo scaled without reference video does not prevent video to
be scaled (the video is scaled, logo scaled, logo overlayed).
== How to reproduce:
{{{
% ffmpeg -y -t 10 -i 'input.mp4' -loop 1 -t 13 -i logo.png -filter_complex
"\
\
[0:v]scale=-2:720[prepaired]; \
[1:v][prepaired]scale=-1:rw/8[logo_scaled]; \
[prepaired][logo_scaled]overlay=10:10" -c:v libx264 -preset fast
output.mp4
ffmpeg version N-119657-gf1b3e51950 [2025-05-22] [7.1.git]
built with gcc 12 (Debian 12.2.0-14+deb12u1)
}}}
Patches should be submitted to the ffmpeg-devel mailing list and not this
bug tracker.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11610>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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