Set -scan_all_pmts 1 in ffmpeg, ffplay and ffprobe if not set by user.

Fixes ticket #3762.

ffmpeg_opt.c

@@ -794,6 +794,7 @@ static int open_input_file(OptionsContext *o, const char *filename)
     char *   video_codec_name = NULL;
     char *   audio_codec_name = NULL;
     char *subtitle_codec_name = NULL;
+    int scan_all_pmts_set = 0;
 
     if (o->format) {
         if (!(file_iformat = av_find_input_format(o->format))) {
@@ -864,12 +865,18 @@ static int open_input_file(OptionsContext *o, const char *filename)
     ic->flags |= AVFMT_FLAG_NONBLOCK;
     ic->interrupt_callback = int_cb;
 
+    if (!av_dict_get(o->g->format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
+        av_dict_set(&o->g->format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
+        scan_all_pmts_set = 1;
+    }
     /* open the input file with generic avformat function */
     err = avformat_open_input(&ic, filename, file_iformat, &o->g->format_opts);
     if (err < 0) {
         print_error(filename, err);
         exit_program(1);
     }
+    if (scan_all_pmts_set)
+        av_dict_set(&o->g->format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
     remove_avoptions(&o->g->format_opts, o->g->codec_opts);
     assert_avoptions(o->g->format_opts);
 

ffplay.c

@@ -2890,6 +2890,7 @@ static int read_thread(void *arg)
     AVDictionary **opts;
     int orig_nb_streams;
     SDL_mutex *wait_mutex = SDL_CreateMutex();
+    int scan_all_pmts_set = 0;
 
     memset(st_index, -1, sizeof(st_index));
     is->last_video_stream = is->video_stream = -1;
@@ -2899,12 +2900,19 @@ static int read_thread(void *arg)
     ic = avformat_alloc_context();
     ic->interrupt_callback.callback = decode_interrupt_cb;
     ic->interrupt_callback.opaque = is;
+    if (!av_dict_get(format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
+        av_dict_set(&format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
+        scan_all_pmts_set = 1;
+    }
     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
     if (err < 0) {
         print_error(is->filename, err);
         ret = -1;
         goto fail;
     }
+    if (scan_all_pmts_set)
+        av_dict_set(&format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
+
     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
         ret = AVERROR_OPTION_NOT_FOUND;

ffprobe.c

@@ -2386,12 +2386,19 @@ static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
     AVFormatContext *fmt_ctx = NULL;
     AVDictionaryEntry *t;
     AVDictionary **opts;
+    int scan_all_pmts_set = 0;
 
+    if (!av_dict_get(format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
+        av_dict_set(&format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
+        scan_all_pmts_set = 1;
+    }
     if ((err = avformat_open_input(&fmt_ctx, filename,
                                    iformat, &format_opts)) < 0) {
         print_error(filename, err);
         return err;
     }
+    if (scan_all_pmts_set)
+        av_dict_set(&format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
         return AVERROR_OPTION_NOT_FOUND;