+/* open the muxer when all the streams are initialized */
+static int check_init_output_file(OutputFile *of, int file_index)
+{
+ int ret, i;
+
+ for (i = 0; i < of->ctx->nb_streams; i++) {
+ OutputStream *ost = output_streams[of->ost_index + i];
+ if (!ost->initialized)
+ return 0;
+ }
+
+ of->ctx->interrupt_callback = int_cb;
+
+ ret = avformat_write_header(of->ctx, &of->opts);
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Could not write header for output file #%d "
+ "(incorrect codec parameters ?): %s",
+ file_index, av_err2str(ret));
+ return ret;
+ }
+ //assert_avoptions(of->opts);
+ of->header_written = 1;
+
+ av_dump_format(of->ctx, file_index, of->ctx->filename, 1);
+
+ if (sdp_filename || want_sdp)
+ print_sdp();
+
+ /* flush the muxing queues */
+ for (i = 0; i < of->ctx->nb_streams; i++) {
+ OutputStream *ost = output_streams[of->ost_index + i];
+
+ while (av_fifo_size(ost->muxing_queue)) {
+ AVPacket pkt;
+ av_fifo_generic_read(ost->muxing_queue, &pkt, sizeof(pkt), NULL);
+ write_packet(of, &pkt, ost);
+ }
+ }
+
+ return 0;
+}
+