On Sun, Jan 26, 2020, at 4:46 AM, Paul B Mahol wrote:
> +@item wipeleft
> +@item wiperight
> +@item wipeup
> +@item wipedown
Nice filter, but you're missing the best wipe of them all: starwipe.
> +@item slideleft
> +@item slideright
> +@item slideup
> +@item slidedown
> +@end table
> +Default transition effect is fade.
> +
> +@item duration
> +Set cross fade duration in seconds.
Add "Default is 1 second".
> +@item offset
> +Set cross fade start relative to first input stream.
Add "Default is 0".
Compilation is spammy with warnings on gcc 9.2.0:
libavfilter/vf_xfade.c: In function ‘uninit’:
libavfilter/vf_xfade.c:107:19: warning: unused variable ‘s’ [-Wunused-variable]
107 | XFadeContext *s = ctx->priv;
| ^
libavfilter/vf_xfade.c: In function ‘slideleft8_transition’:
libavfilter/vf_xfade.c:300:35: warning: ‘*’ in boolean context, suggest ‘&&’
instead [-Wint-in-bool-context]
300 | dst[x] = (zx > 0) * (zx < width) ? xf1[zz] : xf0[zz];
\
| ~~~~~~~~~^~~~~~~~~~~~~~
libavfilter/vf_xfade.c:310:1: note: in expansion of macro ‘SLIDELEFT_TRANSITION’
310 | SLIDELEFT_TRANSITION(8, uint8_t, 1)
| ^~~~~~~~~~~~~~~~~~~~
libavfilter/vf_xfade.c: In function ‘slideleft16_transition’:
libavfilter/vf_xfade.c:300:35: warning: ‘*’ in boolean context, suggest ‘&&’
instead [-Wint-in-bool-context]
300 | dst[x] = (zx > 0) * (zx < width) ? xf1[zz] : xf0[zz];
\
| ~~~~~~~~~^~~~~~~~~~~~~~
libavfilter/vf_xfade.c:311:1: note: in expansion of macro ‘SLIDELEFT_TRANSITION’
311 | SLIDELEFT_TRANSITION(16, uint16_t, 2)
| ^~~~~~~~~~~~~~~~~~~~
libavfilter/vf_xfade.c: In function ‘slideright8_transition’:
libavfilter/vf_xfade.c:333:35: warning: ‘*’ in boolean context, suggest ‘&&’
instead [-Wint-in-bool-context]
333 | dst[x] = (zx > 0) * (zx < width) ? xf1[zz] : xf0[zz];
\
| ~~~~~~~~~^~~~~~~~~~~~~~
libavfilter/vf_xfade.c:343:1: note: in expansion of macro
‘SLIDERIGHT_TRANSITION’
343 | SLIDERIGHT_TRANSITION(8, uint8_t, 1)
| ^~~~~~~~~~~~~~~~~~~~~
libavfilter/vf_xfade.c: In function ‘slideright16_transition’:
libavfilter/vf_xfade.c:333:35: warning: ‘*’ in boolean context, suggest ‘&&’
instead [-Wint-in-bool-context]
333 | dst[x] = (zx > 0) * (zx < width) ? xf1[zz] : xf0[zz];
\
| ~~~~~~~~~^~~~~~~~~~~~~~
libavfilter/vf_xfade.c:344:1: note: in expansion of macro
‘SLIDERIGHT_TRANSITION’
344 | SLIDERIGHT_TRANSITION(16, uint16_t, 2)
| ^~~~~~~~~~~~~~~~~~~~~
libavfilter/vf_xfade.c: In function ‘slideup8_transition’:
libavfilter/vf_xfade.c:366:35: warning: ‘*’ in boolean context, suggest ‘&&’
instead [-Wint-in-bool-context]
366 | dst[x] = (zy > 0) * (zy < height) ? xf1[x] : xf0[x];
\
| ~~~~~~~~~^~~~~~~~~~~~~~~
libavfilter/vf_xfade.c:374:1: note: in expansion of macro ‘SLIDEUP_TRANSITION’
374 | SLIDEUP_TRANSITION(8, uint8_t, 1)
| ^~~~~~~~~~~~~~~~~~
libavfilter/vf_xfade.c: In function ‘slideup16_transition’:
libavfilter/vf_xfade.c:366:35: warning: ‘*’ in boolean context, suggest ‘&&’
instead [-Wint-in-bool-context]
366 | dst[x] = (zy > 0) * (zy < height) ? xf1[x] : xf0[x];
\
| ~~~~~~~~~^~~~~~~~~~~~~~~
libavfilter/vf_xfade.c:375:1: note: in expansion of macro ‘SLIDEUP_TRANSITION’
375 | SLIDEUP_TRANSITION(16, uint16_t, 2)
| ^~~~~~~~~~~~~~~~~~
libavfilter/vf_xfade.c: In function ‘slidedown8_transition’:
libavfilter/vf_xfade.c:397:35: warning: ‘*’ in boolean context, suggest ‘&&’
instead [-Wint-in-bool-context]
397 | dst[x] = (zy > 0) * (zy < height) ? xf1[x] : xf0[x];
\
| ~~~~~~~~~^~~~~~~~~~~~~~~
libavfilter/vf_xfade.c:405:1: note: in expansion of macro ‘SLIDEDOWN_TRANSITION’
405 | SLIDEDOWN_TRANSITION(8, uint8_t, 1)
| ^~~~~~~~~~~~~~~~~~~~
libavfilter/vf_xfade.c: In function ‘slidedown16_transition’:
libavfilter/vf_xfade.c:397:35: warning: ‘*’ in boolean context, suggest ‘&&’
instead [-Wint-in-bool-context]
397 | dst[x] = (zy > 0) * (zy < height) ? xf1[x] : xf0[x];
\
| ~~~~~~~~~^~~~~~~~~~~~~~~
libavfilter/vf_xfade.c:406:1: note: in expansion of macro ‘SLIDEDOWN_TRANSITION’
406 | SLIDEDOWN_TRANSITION(16, uint16_t, 2)
| ^~~~~~~~~~~~~~~~~~~~
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