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Defined in avformat.h

Set the output parameters of the output video context (see libavformat/output_example.c). Must be done even if no parameters in order to prepare the output format context. In this latter case use ap may be NULL.

int av_set_parameters(AVFormatContext *s,
                      AVFormatParameters *ap);

AVFormatContext *s

The output video context to be populated.

AVFormatParameters *ap

The parameters (sometimes gathered from the command line). May be NULL.

Unknown.

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