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=====av_set_parameters=====
====Overview====
Defined in ''avformat.h''\\

Set the output parameters of the output video context (see [[ffmpeg:output_example]]). Must be done even if no parameters in order to prepare the output format context. In this latter case ''ap'' may be NULL.

<code c>
int av_set_parameters(AVFormatContext *s,
                      AVFormatParameters *ap);
</code>

====Parameters====
===s===
<code c>AVFormatContext *s</code>
A pointer to the output video context ([[ffmpeg:AVFormatContext]]) to be populated.

===ap===
<code c>AVFormatParameters *ap</code>
A pointer to the format parameters ([[ffmpeg:AVFormatParameters]]) (sometimes gathered from the command line). May be NULL.


====Return value====
On invalid output format returns a negative number.

====See also====

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Back to [[ffmpeg:ffmpeg]]