NextCore Media

Create images, videos and short films with the free generations of profiles signed in to Muse AI, ChatGPT, Gemini and other services, with an AI Director that drafts scenes and sizes for each platform.

Sidebar › NEXTCORE MEDIA. This screen creates images, videos and short films using the profiles you have signed in to image generation services (Muse AI, ChatGPT, Gemini…). The app types the request and reads the result in the background inside the profile, so each generation counts against that service account's plan, not against NextCore.

A film is made of several scenes. You tell the Đạo diễn (Director) what the video is for, the Director proposes scenes one by one, and every scene you keep goes into the script. No generations are spent until you click build.

#Top bar

The right corner of the top bar shows the remaining Muse quota; click it to open Nguồn tạo (Generation sources). The Hướng dẫn (Guide) button opens a task list, and the app circles each button to click right on the screen.

#Projects screen

The top of the page reads Media · N dự án (Media · N projects). Below it are the box for talking to the Director, the Tìm dự án, nhân vật (Search projects, characters) box, the filters Tất cả (All) · Đang dựng (In progress) · Đã xuất (Exported) · Lỗi (Error) and an aspect ratio filter. The project table has the columns Dự án (Project), Nhân vật (Characters), Cảnh (Scenes), Sửa lúc (Edited), Trạng thái (Status); in a narrow window two columns are hidden. Click a row to open the project.

With no projects yet, the screen has only two buttons: Dự án mới (New project) and Chọn từ 12 mẫu (Choose from 12 templates). Dự án mới (New project) creates an empty project and opens the Director straight away.

#First step: add profiles to Generation sources

1. Open Nguồn tạo (Generation sources) and click Thêm profile vào bể (Add profile to pool) (or Gắn profile (Attach profile) on a service row that has no profile yet).
2. In the Thêm profile vào bể quota (Add profile to quota pool) dialog: choose the Dịch vụ (Service), choose the Profile that is (or will be) signed in to that service, and choose the Gói thuê bao (Subscription plan), which is used to estimate the weekly generation cap.
3. If the profile is not signed in yet, click Mở profile đăng nhập (Open profile to sign in), sign in, then click the recheck button on the card (or Kiểm phiên (Check session) on the service row).

Each profile card in the pool shows the session status, a bar of the remaining quota and the refresh time. A quota marked «ước tính» (estimate) means the app counts the generations used this week against the plan's cap; for Muse the real number can be read. Làm mới quota (Refresh quota) rechecks the sessions of the whole pool. The ⋯ menu on a card: change plan, Dịch vụ đã cấp lại lượt (Service has restored generations), Bỏ khỏi bể (Remove from pool).

#Voice

The Giọng đọc (Voice) row in Nguồn tạo (Generation sources) uses the text-to-speech sources you added in NEXTCORE AGENT (OpenAI, ElevenLabs, MiniMax, or Tuỳ chỉnh (OpenAI-compatible) (Custom (OpenAI-compatible))). With no source yet, click Tìm máy chủ trên máy này (Find servers on this machine): the app looks for text-to-speech servers already running on your machine (ports 8880, 8000, 8890) and offers Thêm làm nguồn (Add as source) in one click. A local server costs nothing; the app does not install or download voice models itself.

Type a Câu đọc thử (Test sentence), choose the Giọng (Voice) and Tốc độ (Speed), and click Đọc thử (Read aloud). A local machine usually takes 10–20 seconds; when it is done you can listen right in the app, and Open folder gets you the audio file. In a character profile you can choose a separate voice and speed (0.5× to 2×); click Nghe thử (Preview) to listen.

When generating, the app picks the profile of that service with the most quota left. A profile the service has just rate-limited (429) rests until the time it reopens.

#Fallback through Cloud API

The NEXTCORE AGENT · Cloud API row at the bottom of the service list is the fallback route: when the profile pool runs out of generations or sessions, the app switches to generating with your API key, with nothing to click. Images go through OpenAI Images, Imagen 4 or FLUX (Together); videos go through Veo with a Google Gemini key. The app chooses the model from the list of models that key is allowed to use.

• No key: the row says «Chưa có khoá» (No key yet). Add an OpenAI, Google Gemini or Together key in NEXTCORE AGENT › Nhà cung cấp (Providers).
• With a key: the row says «Sẵn sàng» (Ready) with the names of the providers available.
• Generations through the API are billed to your key and count toward the trần chi tiêu mỗi ngày (daily spending cap) set in NEXTCORE AGENT. When the cap is reached, the app stops and creates nothing more.

#Character voice

In the panel for creating or editing a virtual character in PROFILE MANAGER, the Giọng đọc (Voice) box opens a list of voices grouped by source (OpenAI, ElevenLabs, MiniMax, This machine, Tuỳ chỉnh (Custom)). Type in the Tìm giọng (Search voices) box (for example «nữ, miền Nam, ấm», meaning female, southern accent, warm; typing without diacritics works too), or filter by gender and region. Each row has a preview button of about 3 seconds, one voice at a time. Tốc độ (Speed) goes from 0.8× to 1.2×. The voice chosen here is the default voice for that character's lines in NEXTCORE MEDIA; if you have not chosen one, click Chọn sau (Choose later) and the character can still be created.

• If the server does not return a voice list, the box turns into a field for a voice ID, for example vi_hoa.
• Máy chủ không trả âm thanh (503) (Server returned no audio (503)): the model is loading, try again in a few seconds.
• With a wrong API key (401), the preview buttons of that whole group are locked; fix the key in NEXTCORE AGENT › Nhà cung cấp (Providers).

#Director's brain

The Bộ não Đạo diễn (Director's brain) block in Nguồn tạo (Generation sources) chooses who drafts the scenes:

• A model in NEXTCORE AGENT: replies in about 3 seconds, with API costs billed to your key.
• Muse through a profile: free, takes about 20–30 seconds.

This choice is the default for every project; inside each project you can still change it in the selector under the chat panel.

#Build a video with the Director

1. Dự án (Projects) › the «Kể Đạo diễn video bạn muốn làm» (Tell the Director the video you want to make) box (or Dự án mới (New project), then describe it in the chat panel). Keep it short: how many seconds the video is, who watches it, what you want them to do. For example: «a 20-second video reviewing a room with a bathtub and a hill view in Da Lat, the audience is young couples from Saigon, I want them to book a weekend». Click send.
2. The app creates the project and opens the chat view. The Director asks a few questions and proposes scenes. Click Giữ cảnh này (Keep this scene) on each scene, or Giữ cả N cảnh đề xuất (Keep all N proposed scenes).
3. Kept scenes appear in the Bảng cảnh (Scene board), one row per scene: frame, content, lines, voice, length, status. The Director sits in the right panel; on a narrow screen click Đạo diễn · N tin (Director · N messages) to open the panel and Esc to close it.
4. The top of the page has one main button that changes with the stage: Dựng N cảnh còn lại (Build N remaining scenes) creates each scene with the profile pool, Ghép phim (Assemble film) once all scenes are ready, then Xuất & đăng (Export & post). A failed scene has a rebuild button right on its row.
5. The bar above the board: Tạo bằng (Create with) (the service for the whole project), Giọng chung (Shared voice) (applies one voice to every scene), Nối khung cuối cảnh trước (Chain from previous scene's last frame).

A project has three modes: Bảng cảnh (Scene board), Luồng (Flow) (a node graph: profiles, scene prompts, results, film export) and Dòng thời gian (Timeline) (character, product and setting profiles plus the shot list).

In Dòng thời gian (Timeline): Thêm nhân vật (Add character), Thêm sản phẩm (Add product), Thêm bối cảnh (Add setting) lock profiles shared by every scene; Thêm phân cảnh (Add shot); NEXTCORE AGENT đề xuất cốt truyện (NEXTCORE AGENT suggests a storyline); Chạy cả chuỗi (Run the whole sequence) creates every scene in turn. For two consecutive scenes, the last frame of the earlier scene is chained to the first frame of the next so the film flows continuously.

#Shared characters

Characters created on the Profile screen (virtual characters attached to a profile) can be reused in any project. Since version 0.3.149:

• An older character profile that lives inside one project: in Dòng thời gian (Timeline), open the character card's menu › Thành nhân vật dùng chung (Make shared character). The app copies the description, reference images and outfits into a new character; if a character with the same name already exists, it merges into that one.
• To attach an existing character to a profile: in the Tạo nhân vật (Create character) panel, the Hoặc gắn nhân vật có sẵn (Or attach an existing character) block lists characters not attached to any profile.
• If a character has a voice description, scenes with that character's lines carry the voice into the video prompt automatically (for example «speaks slowly», «speaks fast»). A scene where you wrote its own voice keeps the scene's voice. Muse, Veo, Kling and Hailuo generate speech from the text in the prompt, so the voice here is a description, not a prerecorded voice.

#Brand stamp

Below the Bảng cảnh (Scene board), the Đóng dấu (Stamp) block opens the Đóng dấu thương hiệu (Brand stamp) dialog: enter the Chữ thương hiệu (Brand text), choose the Logo (PNG, WebP, JPG with a transparent background), the Vị trí (Position) (one corner, or Luân phiên (Rotate) to change corner every scene) and the Cỡ logo (Logo size). The stamp is drawn into the film on export; the original clips in the Library stay unchanged.

#Create from real sources

On the Dự án (Projects) screen, open the collapsible Tạo từ nguồn thật (Create from real sources) block below the table. This block builds a project from existing data. Scenes with real images are done immediately and spend no generations.

#Quick create an image or video

Tạo nhanh (Quick create) › choose Ảnh (Image) or Video đa chủ thể (Multi-subject video).

1. Dịch vụ (Service): the app picks the profile with the most quota left.
2. Chế độ (Mode) (images): Ảnh sản phẩm (Product photo) (keeps the shape and labels intact), Poster quảng cáo (Ad poster) (clear headline text), Background / phông nền (Background) (an empty backdrop for compositing), Canvas đa lớp (Layered canvas) (combine subjects, extend the frame).
3. Ảnh đầu vào (Input images): add images of characters, products, settings (PNG, JPG, WEBP). The app sends them in order.
4. Kích thước (Size) (images) or Tỷ lệ khung (Aspect ratio) (videos: 1:1, 16:9, 9:16, 4:5, 21:9). Videos also have Thể loại (Genre), Chuyển động camera (Camera motion) (Orbit 360°, Slow pan, Push-in, Handheld, Cinematic B-roll) and Âm thanh (Audio) (Không âm thanh (No audio), Nhạc nền nhẹ (Light background music), Âm thanh tại cảnh (Ambient sound)).
5. Mô tả ảnh (Image description) or Mô tả chuyển động (Motion description), up to 4,000 characters; Vietnamese is fine. Tối ưu prompt bằng NEXTCORE AGENT (Optimize prompt with NEXTCORE AGENT) rewrites the prompt in more depth; with no AI set up, the app fills in the mode's template.
6. Click Tạo ảnh (Create image) or Tạo video (Create video). The result appears on the right and is saved to the Library.

The Kết quả (Results) area on the right is a grid of up to 6 recent Quick create runs of the same type. A run in progress has a progress bar and a timer (for example «Muse AI đang vẽ · 0:18», Muse AI is drawing · 0:18). A finished run: click the image to view it large, Thêm vào dự án (Add to project) to put it in a project's Products section, and the download button to save it to the machine (the Downloads folder by default). A failed run sits as a strip below the grid with a Tạo lại (Create again) button; if the failure was an oversized reference image, the button is Nén rồi tạo lại (Compress and create again) (the app shrinks the image to 1,600 px on the long edge and sends it again). At the end of the area is a link to the Library with the Images filter already on.

#Sizes per platform

The size selector has ready sizes for each place you post to, searchable by text (for example thumbnail, bìa nhóm (group cover), A4, 1280x720, 9:16):

For sizes with a safe zone (for example Story leaves 250 px at the top and bottom for the account name), the preview frame draws a dashed line. You can also type a custom size: each side from 16 to 10,000 px, with a ratio no flatter than 8:1. The app tells you which ratio to generate at and how much to crop.

#Library, templates and film export

• Thư viện (Library): every generation, grouped by day (Hôm nay (Today), Hôm qua (Yesterday), a specific date), filtered by Tất cả (All) · Phim (Films) · Ảnh (Images) · Video (Videos) · Lỗi (Error), searchable by scene or project name. Images in the library can be reused as reference images.
• Mẫu (Templates): script templates with a ready scene rhythm and questions for the Director. Dùng mẫu (Use template) creates a new project; Bắt đầu từ mẫu trống (Start from a blank template) if you want to write it yourself. Lưu dự án thành mẫu (Save project as template) keeps the character, product and setting profiles and the scene order (it does not copy created images or videos), with a version note.
• Xuất & đăng (Export & post): each film comes with a format check line. TikTok and Reels need 9:16; Shorts accepts portrait or square, up to 60 seconds; the Facebook feed suits 4:5 or 1:1. Click Xem phim (Watch film) or Mở dự án (Open project).

The lower left corner of the screen occasionally shows a partner card (at most once every 20 minutes, hides itself after 10 seconds, never shown while you are generating or typing). Clicking the card opens the partner's page in an external browser; click ✕ to hide it for 7 days.

The app does not post films to social networks itself yet. Click Open folder while watching a film or in the Library to get the file, then post it by hand.

#Not in this version yet

• Dubbing a character's prerecorded voice into the film. Voices can be previewed in Nguồn tạo (Generation sources) and in the character's voice box. Nhạc nền (Background music) has been available since 0.3.156: the Nhạc nền (Background music) block below the Scene board, Chọn (Choose) a music file, and the app mixes it in when assembling the film.

#Common errors

• Chưa có bộ não cho Đạo diễn (The Director has no brain yet): add a Muse profile in Nguồn tạo (Generation sources) (free) or an API key in NEXTCORE AGENT.
• A profile card reports the session expired, with a cookie count: the sign-in session for the service has ended. Click Mở profile đăng nhập (Open profile to sign in), sign in again, then click recheck.
• Mở lại lúc giờ-phút (Reopens at hour:minute): the service has temporarily rate-limited this profile (429). The app uses another profile in the pool if one is left.
• Đã gửi, chưa nhận kết quả (Sent, no result yet): the service accepted the request but has not returned an image. Check inside the profile or create again later.
• Ratio flatter than 8:1: no service can generate it; choose a ratio closer to square and crop afterwards.
• An SVG logo cannot be drawn into the film yet: export the logo as a PNG with a transparent background and choose it again.

#Language

Since 0.3.172, the NEXTCORE MEDIA screen shows English when you choose English in Cài đặt › Giao diện (Settings › Appearance), or choose Use system setting on a machine that uses English. Content you enter and data taken from Facebook stay in their original language.