ffmpeg: remove presets.

Nothing except x264 uses them and native x264 presets should be used
with private options.

ffmpeg.c

@@ -4285,47 +4285,6 @@ static int opt_bsf(const char *opt, const char *arg)
     return 0;
 }
 
-static int opt_preset(const char *opt, const char *arg)
-{
-    FILE *f=NULL;
-    char filename[1000], tmp[1000], tmp2[1000], line[1000];
-    char *codec_name = *opt == 'v' ? video_codec_name :
-                       *opt == 'a' ? audio_codec_name :
-                                     subtitle_codec_name;
-
-    if (!(f = get_preset_file(filename, sizeof(filename), arg, *opt == 'f', codec_name))) {
-        fprintf(stderr, "File for preset '%s' not found\n", arg);
-        exit_program(1);
-    }
-
-    while(!feof(f)){
-        int e= fscanf(f, "%999[^\n]\n", line) - 1;
-        if(line[0] == '#' && !e)
-            continue;
-        e|= sscanf(line, "%999[^=]=%999[^\n]\n", tmp, tmp2) - 2;
-        if(e){
-            fprintf(stderr, "%s: Invalid syntax: '%s'\n", filename, line);
-            exit_program(1);
-        }
-        if(!strcmp(tmp, "acodec")){
-            opt_audio_codec(tmp, tmp2);
-        }else if(!strcmp(tmp, "vcodec")){
-            opt_video_codec(tmp, tmp2);
-        }else if(!strcmp(tmp, "scodec")){
-            opt_subtitle_codec(tmp, tmp2);
-        }else if(!strcmp(tmp, "dcodec")){
-            opt_data_codec(tmp, tmp2);
-        }else if(opt_default(tmp, tmp2) < 0){
-            fprintf(stderr, "%s: Invalid option or argument: '%s', parsed as '%s' = '%s'\n", filename, line, tmp, tmp2);
-            exit_program(1);
-        }
-    }
-
-    fclose(f);
-
-    return 0;
-}
-
 static void log_callback_null(void* ptr, int level, const char* fmt, va_list vl)
 {
 }
@@ -4461,10 +4420,6 @@ static const OptionDef options[] = {
     { "vbsf", HAS_ARG | OPT_VIDEO | OPT_EXPERT, {(void*)opt_bsf}, "", "bitstream_filter" },
     { "sbsf", HAS_ARG | OPT_SUBTITLE | OPT_EXPERT, {(void*)opt_bsf}, "", "bitstream_filter" },
 
-    { "apre", HAS_ARG | OPT_AUDIO | OPT_EXPERT, {(void*)opt_preset}, "set the audio options to the indicated preset", "preset" },
-    { "vpre", HAS_ARG | OPT_VIDEO | OPT_EXPERT, {(void*)opt_preset}, "set the video options to the indicated preset", "preset" },
-    { "spre", HAS_ARG | OPT_SUBTITLE | OPT_EXPERT, {(void*)opt_preset}, "set the subtitle options to the indicated preset", "preset" },
-    { "fpre", HAS_ARG | OPT_EXPERT, {(void*)opt_preset}, "set options from indicated preset file", "filename" },
     /* data codec support */
     { "dcodec", HAS_ARG | OPT_DATA, {(void*)opt_data_codec}, "force data codec ('copy' to copy stream)", "codec" },