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avfilter/dualinput: Add support to skip initial unpaired frames
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -66,6 +66,9 @@ int ff_dualinput_init(AVFilterContext *ctx, FFDualInputContext *s)
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in[1].after = EXT_NULL;
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in[1].sync = 0;
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}
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if (s->skip_initial_unpaired) {
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in[1].before = EXT_STOP;
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}
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return ff_framesync_configure(&s->fs);
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}
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@ -35,6 +35,7 @@ typedef struct {
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AVFrame *(*process)(AVFilterContext *ctx, AVFrame *main, const AVFrame *second);
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int shortest; ///< terminate stream when the second input terminates
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int repeatlast; ///< repeat last second frame
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int skip_initial_unpaired; ///< Skip initial frames that do not have a 2nd input
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} FFDualInputContext;
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int ff_dualinput_init(AVFilterContext *ctx, FFDualInputContext *s);
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