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authorMichael Niedermayer <michaelni@gmx.at>2012-04-14 21:49:01 +0200
committerMichael Niedermayer <michaelni@gmx.at>2012-04-14 22:37:43 +0200
commit7432bcfe5a36331502c49fe03aefe39b9936247a (patch)
tree398b1874abbd4bcf7c103738ac4548e830af0a43 /doc/filters.texi
parent01bf2ad7351fdaa2e21b6bdf963d22d6ffccb920 (diff)
parent7bf9e3391fa21d90ff283fc03a12287fe73db9e8 (diff)
downloadffmpeg-7432bcfe5a36331502c49fe03aefe39b9936247a.tar.gz
Merge remote-tracking branch 'qatar/master'
* qatar/master: vsrc_buffer: fix check from 7ae7c41. libxvid: Reorder functions to avoid forward declarations; make functions static. libxvid: drop some pointless dead code wmal: vertical alignment cosmetics wmal: Warn about missing bitstream splicing feature and ask for sample. wmal: Skip seekable_frame_in_packet. wmal: Drop unused variable num_possible_block_size. avfiltergraph: make the AVFilterInOut alloc/free API public graphparser: allow specifying sws flags in the graph description. graphparser: fix the order of connecting unlabeled links. graphparser: add avfilter_graph_parse2(). vsrc_buffer: allow using a NULL buffer to signal EOF. swscale: handle last pixel if lines have an odd width. qdm2: fix a dubious pointer cast WMAL: Do not try to read rawpcm coefficients if bits is invalid mov: Fix detecting there is no sync sample. tiffdec: K&R cosmetics avf: has_duration does not check the global one dsputil: fix optimized emu_edge function on Win64. Conflicts: doc/APIchanges libavcodec/libxvid_rc.c libavcodec/libxvidff.c libavcodec/tiff.c libavcodec/wmalosslessdec.c libavfilter/avfiltergraph.h libavfilter/graphparser.c libavfilter/version.h libavfilter/vsrc_buffer.c libswscale/output.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'doc/filters.texi')
-rw-r--r--doc/filters.texi8
1 files changed, 7 insertions, 1 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 38312a5237..08ed11cc73 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -76,6 +76,12 @@ In a complete filterchain all the unlabelled filter input and output
pads must be connected. A filtergraph is considered valid if all the
filter input and output pads of all the filterchains are connected.
+Libavfilter will automatically insert scale filters where format
+conversion is required. It is possible to specify swscale flags
+for those automatically inserted scalers by prepending
+@code{sws_flags=@var{flags};}
+to the filtergraph description.
+
Follows a BNF description for the filtergraph syntax:
@example
@var{NAME} ::= sequence of alphanumeric characters and '_'
@@ -84,7 +90,7 @@ Follows a BNF description for the filtergraph syntax:
@var{FILTER_ARGUMENTS} ::= sequence of chars (eventually quoted)
@var{FILTER} ::= [@var{LINKNAMES}] @var{NAME} ["=" @var{ARGUMENTS}] [@var{LINKNAMES}]
@var{FILTERCHAIN} ::= @var{FILTER} [,@var{FILTERCHAIN}]
-@var{FILTERGRAPH} ::= @var{FILTERCHAIN} [;@var{FILTERGRAPH}]
+@var{FILTERGRAPH} ::= [sws_flags=@var{flags};] @var{FILTERCHAIN} [;@var{FILTERGRAPH}]
@end example
@c man end FILTERGRAPH DESCRIPTION