Initialize format. May allocate data here, and set any AVFormatContext or
AVStream parameters that need to be set before packets are sent.
This method must not write output.
Return 0 if streams were fully configured, 1 if not, negative AVERROR on failure
Any allocations made here must be freed in deinit().
Initialize format. May allocate data here, and set any AVFormatContext or AVStream parameters that need to be set before packets are sent. This method must not write output.
Return 0 if streams were fully configured, 1 if not, negative AVERROR on failure
Any allocations made here must be freed in deinit().