doc/examples/filtering_video: better demo ffmpeg filters; demos chaining the filters
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -38,7 +38,10 @@
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#include <libavfilter/buffersrc.h>
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#include <libavutil/opt.h>
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const char *filter_descr = "scale=78:24";
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const char *filter_descr = "scale=78:24,transpose=cclock";
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/* other way:
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scale=78:24 [scl]; [scl] transpose=cclock // assumes "[in]" and "[out]" to be input output pads respectively
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*/
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static AVFormatContext *fmt_ctx;
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static AVCodecContext *dec_ctx;
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