ffm_read_write_index 2412 ffserver.c         if ((c->stream->feed_write_index = ffm_read_write_index(fd)) < 0) {
ffm_read_write_index 3554 ffserver.c             feed->feed_write_index = ffm_read_write_index(fd);
ffm_read_write_index 1235 libavformat/avformat.h int64_t ffm_read_write_index(int fd);