See http://lists.ffmpeg.org/pipermail/ffmpeg-user/2017-April/035975.html Parsed_filter_X could remain and user can override it with custom one. Example: ffplay -f lavfi "nullsrc=s=640x360, sendcmd='1 drawtext@top reinit text=Hello; 2 drawtext@bottom reinit text=World', drawtext@top=x=16:y=16:fontsize=20:fontcolor=Red:text='', drawtext@bottom=x=16:y=340:fontsize=16:fontcolor=Blue:text=''"
Showing the changes to libavfilter/graphparser.c (1 of 2 files). Show all
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| @@ -88,20 +88,36 @@ static char *parse_link_name(const char **buf, void *log_ctx) · 87 unmodified lines | |||
| 88 | * @param filt_ctx put here a filter context in case of successful creation and configuration, NULL otherwise. | 88 | * @param filt_ctx put here a filter context in case of successful creation and configuration, NULL otherwise. |
| 89 | * @param ctx the filtergraph context | 89 | * @param ctx the filtergraph context |
| 90 | * @param index an index which is supposed to be unique for each filter instance added to the filtergraph | 90 | * @param index an index which is supposed to be unique for each filter instance added to the filtergraph |
| 91 | * @param filt_name the name of the filter to create | 91 | * @param name the name of the filter to create, can be filter name or filter_name\@id as instance name |
| 92 | * @param args the arguments provided to the filter during its initialization | 92 | * @param args the arguments provided to the filter during its initialization |
| 93 | * @param log_ctx the log context to use | 93 | * @param log_ctx the log context to use |
| 94 | * @return >= 0 in case of success, a negative AVERROR code otherwise | 94 | * @return >= 0 in case of success, a negative AVERROR code otherwise |
| 95 | */ | 95 | */ |
| 96 | static int create_filter(AVFilterContext **filt_ctx, AVFilterGraph *ctx, int index, | 96 | static int create_filter(AVFilterContext **filt_ctx, AVFilterGraph *ctx, int index, |
| 97 | const char *filt_name, const char *args, void *log_ctx) | 97 | const char *name, const char *args, void *log_ctx) |
| 98 | { | 98 | { |
| 99 | AVFilter *filt; | 99 | AVFilter *filt; |
| 100 | char inst_name[30]; | 100 | char name2[30]; |
| 101 | const char *inst_name = NULL, *filt_name = NULL; | ||
| 101 | char *tmp_args = NULL; | 102 | char *tmp_args = NULL; |
| 102 | int ret; | 103 | int ret, k; |
| 104 | |||
| 105 | av_strlcpy(name2, name, sizeof(name2)); | ||
| 106 | |||
| 107 | for (k = 0; name2[k]; k++) { | ||
| 108 | if (name2[k] == '@' && name[k+1]) { | ||
| 109 | name2[k] = 0; | ||
| 110 | inst_name = name; | ||
| 111 | filt_name = name2; | ||
| 112 | break; | ||
| 113 | } | ||
| 114 | } | ||
| 103 | 115 | ||
| 104 | snprintf(inst_name, sizeof(inst_name), "Parsed_%s_%d", filt_name, index); | 116 | if (!inst_name) { |
| 117 | snprintf(name2, sizeof(name2), "Parsed_%s_%d", name, index); | ||
| 118 | inst_name = name2; | ||
| 119 | filt_name = name; | ||
| 120 | } | ||
| 105 | 121 | ||
| 106 | filt = avfilter_get_by_name(filt_name); | 122 | filt = avfilter_get_by_name(filt_name); |
| 107 | 123 | ||