Opened 14 years ago
Closed 14 years ago
#198 closed defect (invalid)
Video filters bug?
| Reported by: | burek | Owned by: | Michael Niedermayer |
|---|---|---|---|
| Priority: | minor | Component: | ffmpeg |
| Version: | unspecified | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | yes |
Description
Hi,
While helping a guy to stack 'scale' and 'crop' video filters, we've encountered a possible bug, so I think it's better to report it, although I'm not sure if the duplicate of this report exist.
Anyway: "scale=-1:480,crop=iw-mod(iw,2):480" gives: No such filter: '2):480'
when
-vf "scale=-1:480,crop=iw-mod(iw,2):480"
is given, ffmpeg mistakes the comma in the parenthesis for the delimiter of video filters (or this is the intended behavior?)
however, the issue can be resolved with a workaround:
"scale=-1:480,crop=(iw-mod(iw\,2)):480"
Change History (1)
comment:1 by , 14 years ago
| Analyzed by developer: | set |
|---|---|
| Reproduced by developer: | set |
| Resolution: | → invalid |
| Status: | new → closed |
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Hi, this is the assumed behavior, since ',' is a special character in the filtergraph syntax, so you need to escape it.
This can be done either with:
crop='iw-mod(iw,2):480',...
or as you suggested:
crop=iw-mod(iw\,2):480,...
On the other hand I see this should be documented better, and maybe we should add some examples in the crop documentation (contributions in this area are welcome).