-
- while(ass->extra_index < avctx->extradata_size){
- uint8_t *p = avctx->extradata + ass->extra_index;
- uint8_t *end= strchr(p, '\n');
- if(!end) end= avctx->extradata + avctx->extradata_size;
- else end++;
-
- avio_write(s->pb, p, end-p);
- ass->extra_index += end-p;
-
- if(last && !memcmp(last, "[Events]", 8))
- break;
- last=p;
+ if (avctx->extradata_size > 0) {
+ avio_write(s->pb, avctx->extradata, avctx->extradata_size);
+ if (avctx->extradata[avctx->extradata_size - 1] != '\n')
+ avio_write(s->pb, "\r\n", 2);
+ ass->ssa_mode = !strstr(avctx->extradata, "\n[V4+ Styles]");
+ if (!strstr(avctx->extradata, "\n[Events]"))
+ avio_printf(s->pb, "[Events]\r\nFormat: %s, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\r\n",
+ ass->ssa_mode ? "Marked" : "Layer");