av_write_header  2021 ffmpeg.c               if (av_write_header(os) < 0) {
av_write_header  2090 ffserver.c             if (av_write_header(&c->fmt_ctx) < 0) {
av_write_header  3223 ffserver.c         if (av_write_header(ctx) < 0) {
av_write_header  3538 ffserver.c                 if (av_write_header(s) < 0) {
av_write_header  1119 libavformat/avformat.h int av_write_header(AVFormatContext *s);
av_write_header   500 output_example.c     av_write_header(oc);