fftools/ffmpeg_mux: add private muxer context

Move header_written into it, which is not (and should not be) used by
any code outside of ffmpeg_mux.

In the future this context will contain more muxer-private state that
should not be visible to other code.

1 files changed, 6 insertions, 0 deletions

diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index ac7fe3b27a..eb2ec2ef07 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -3006,6 +3006,12 @@ loop_end:
         exit_program(1);
     }
 
+    err = of_muxer_init(of);
+    if (err < 0) {
+        av_log(NULL, AV_LOG_FATAL, "Error initializing internal muxing state\n");
+        exit_program(1);
+    }
+
     return 0;
 }