diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index c7db12a640..2aa220da29 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -582,7 +582,6 @@ typedef struct OutputFile {
     const AVOutputFormat *format;
 
     AVFormatContext *ctx;
-    AVDictionary *opts;
     int ost_index;       /* index of the first stream in output_streams */
     int64_t recording_time;  ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
     int64_t start_time;      ///< start time in microseconds == AV_TIME_BASE units
@@ -686,7 +685,7 @@ int hw_device_setup_for_filter(FilterGraph *fg);
 
 int hwaccel_decode_init(AVCodecContext *avctx);
 
-int of_muxer_init(OutputFile *of, int64_t limit_filesize);
+int of_muxer_init(OutputFile *of, AVDictionary *opts, int64_t limit_filesize);
 /* open the muxer when all the streams are initialized */
 int of_check_init(OutputFile *of);
 int of_write_trailer(OutputFile *of);
diff --git a/fftools/ffmpeg_mux.c b/fftools/ffmpeg_mux.c
index ed091a3d2d..0fd7888d4f 100644
--- a/fftools/ffmpeg_mux.c
+++ b/fftools/ffmpeg_mux.c
@@ -46,6 +46,8 @@ typedef struct MuxStream {
 struct Muxer {
     MuxStream *streams;
 
+    AVDictionary *opts;
+
     /* filesize limit expressed in bytes */
     int64_t limit_filesize;
     int64_t final_filesize;
@@ -281,7 +283,7 @@ int of_check_init(OutputFile *of)
             return 0;
     }
 
-    ret = avformat_write_header(of->ctx, &of->opts);
+    ret = avformat_write_header(of->ctx, &of->mux->opts);
     if (ret < 0) {
         av_log(NULL, AV_LOG_ERROR,
                "Could not write header for output file #%d "
@@ -374,6 +376,7 @@ static void mux_free(Muxer **pmux, int nb_streams)
         av_fifo_freep2(&ms->muxing_queue);
     }
     av_freep(&mux->streams);
+    av_dict_free(&mux->opts);
 
     av_freep(pmux);
 }
@@ -393,12 +396,11 @@ void of_close(OutputFile **pof)
     if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE))
         avio_closep(&s->pb);
     avformat_free_context(s);
-    av_dict_free(&of->opts);
 
     av_freep(pof);
 }
 
-int of_muxer_init(OutputFile *of, int64_t limit_filesize)
+int of_muxer_init(OutputFile *of, AVDictionary *opts, int64_t limit_filesize)
 {
     Muxer *mux = av_mallocz(sizeof(*mux));
     int ret = 0;
@@ -424,6 +426,7 @@ int of_muxer_init(OutputFile *of, int64_t limit_filesize)
     }
 
     mux->limit_filesize = limit_filesize;
+    mux->opts           = opts;
 
     if (strcmp(of->format->name, "rtp"))
         want_sdp = 0;
diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index 4d4939c6fd..1bcb7a3006 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -2332,7 +2332,7 @@ static int open_output_file(OptionsContext *o, const char *filename)
     OutputFile *of;
     OutputStream *ost;
     InputStream  *ist;
-    AVDictionary *unused_opts = NULL;
+    AVDictionary *unused_opts = NULL, *format_opts = NULL;
     const AVDictionaryEntry *e = NULL;
 
     if (o->stop_time != INT64_MAX && o->recording_time != INT64_MAX) {
@@ -2357,7 +2357,7 @@ static int open_output_file(OptionsContext *o, const char *filename)
     of->recording_time = o->recording_time;
     of->start_time     = o->start_time;
     of->shortest       = o->shortest;
-    av_dict_copy(&of->opts, o->g->format_opts, 0);
+    av_dict_copy(&format_opts, o->g->format_opts, 0);
 
     if (!strcmp(filename, "-"))
         filename = "pipe:";
@@ -2379,7 +2379,7 @@ static int open_output_file(OptionsContext *o, const char *filename)
         oc->flags    |= AVFMT_FLAG_BITEXACT;
         of->bitexact  = 1;
     } else {
-        of->bitexact  = check_opt_bitexact(oc, of->opts, "fflags",
+        of->bitexact  = check_opt_bitexact(oc, format_opts, "fflags",
                                            AVFMT_FLAG_BITEXACT);
     }
 
@@ -2760,7 +2760,7 @@ loop_end:
         /* open the file */
         if ((err = avio_open2(&oc->pb, filename, AVIO_FLAG_WRITE,
                               &oc->interrupt_callback,
-                              &of->opts)) < 0) {
+                              &format_opts)) < 0) {
             print_error(filename, err);
             exit_program(1);
         }
@@ -2768,7 +2768,7 @@ loop_end:
         assert_file_overwrite(filename);
 
     if (o->mux_preload) {
-        av_dict_set_int(&of->opts, "preload", o->mux_preload*AV_TIME_BASE, 0);
+        av_dict_set_int(&format_opts, "preload", o->mux_preload*AV_TIME_BASE, 0);
     }
     oc->max_delay = (int)(o->mux_max_delay * AV_TIME_BASE);
 
@@ -2962,7 +2962,7 @@ loop_end:
         exit_program(1);
     }
 
-    err = of_muxer_init(of, o->limit_filesize);
+    err = of_muxer_init(of, format_opts, o->limit_filesize);
     if (err < 0) {
         av_log(NULL, AV_LOG_FATAL, "Error initializing internal muxing state\n");
         exit_program(1);
