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cdef extern from "libavfilter/avfilter.h" nogil:
cdef struct AVFilterGraph:
int nb_filters
AVFilterContext **filters
cdef struct AVFilterInOut:
char *name
AVFilterContext *filter_ctx
int pad_idx
AVFilterInOut *next
cdef AVFilterGraph* avfilter_graph_alloc()
cdef void avfilter_graph_free(AVFilterGraph **ptr)
cdef int avfilter_graph_parse2(
AVFilterGraph *graph,
const char *filter_str,
AVFilterInOut **inputs,
AVFilterInOut **outputs
)
cdef AVFilterContext* avfilter_graph_alloc_filter(
AVFilterGraph *graph,
const AVFilter *filter,
const char *name
)
cdef int avfilter_graph_create_filter(
AVFilterContext **filt_ctx,
AVFilter *filt,
const char *name,
const char *args,
void *opaque,
AVFilterGraph *graph_ctx
)
cdef int avfilter_link(
AVFilterContext *src,
unsigned int srcpad,
AVFilterContext *dst,
unsigned int dstpad
)
cdef int avfilter_graph_config(AVFilterGraph *graph, void *logctx)
cdef char* avfilter_graph_dump(AVFilterGraph *graph, const char *options)
cdef void avfilter_inout_free(AVFilterInOut **inout_list)
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