+ c->ctx->ctx_flags = c->ctx->ctx_flags & ~(unsigned)AVFMTCTX_UNSEEKABLE;
+ if (!c->n_variants || !c->variants[0]->n_playlists ||
+ !(c->variants[0]->playlists[0]->finished ||
+ c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
+ c->ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;