# Bulin 47 AI model and output details

Updated: 2026-10-11. https://bulin47.online/

## Generation workflow

The studio uses Kie’s bytedance/seedance-2-5 model for the Bulin 47 freestyle workflow. Sign in with Google, choose one portrait and use a paid generation credit. The motion reference and prompt are fixed for this scene.

One photo guides the main subject's appearance. A fixed motion reference guides gestures, rhythm and camera timing. The output is a 10-second, 720p, 9:16 MP4 with the matching reference soundtrack. Likeness, movement and background details can vary because AI generates new frames.

## A prepared workflow for this scene

Choose this studio when you want to put yourself into the fixed Bulin 47 freestyle scene using one photo. You do not need to film your own performance, write a prompt, upload a reference or compare model settings. The scene reference, prompt and soundtrack are prepared. The 10-second vertical MP4 is available in your private video history to review and download.

For captions, cuts or finishing an existing clip, an editor such as CapCut can help. CapCut also offers face-swap tools; check the particular feature for the result you want. For a different scene or custom parameters, check the portrait and video-reference capabilities of a general AI video tool's current mode. No single model is claimed to be best for every use, and a TikTok post alone does not establish which generator made it.

## Photo preparation and reference roles

Use JPG/JPEG, PNG or WebP up to 10 MB, with each side 301–5760 pixels and width/height strictly between 0.4 and 2.5. The input photo need not be 9:16. Show one unobstructed face with space around the head and shoulders; crop out other people while keeping sufficient resolution. A small face, blur or a heavy beauty filter can reduce the useful appearance information.

The portrait provides appearance information, the motion video provides the performance and camera reference, and the audio provides the soundtrack. These inputs do different jobs: a photo does not provide a voice, and a descriptive prompt does not contain the exact reference performance. The workflow targets the main rapper originally wearing sunglasses and a pale pink shirt behind the foreground speaker holder, not selectable crowd members. There is no duration selector or extension option.

Start with the guide’s preparation checklist: https://bulin47.online/guides/how-to-make-bulin-47-ai-video#before-you-start. The trend guide explains the recognizable 10-second scene and compares the prepared studio with filming, editing and a custom AI workflow: https://bulin47.online/guides/what-is-bulin-47-ai#freestyle-scene.

## Reference and audio

The owner supplied motion.mp4: 23.15 seconds, 720×1250, with an audio track. The default reference is the first 10 seconds, with matching audio extracted separately. Video generation uses Seedance 2.5 with generated audio disabled; the extracted reference audio is added afterward using FAL’s media composition workflow. The uploaded portrait does not provide a voice or a new rap recording.

## Supplied examples

Six supplied creator examples are 6 seconds each, 360×640, vertical 9:16, with no audio track. Creators: @freddoapxj1 (samples 1, 3, 6), @srjimenez_fan (sample 2), @tokischa.luna (sample 4), @yaiseloficial (sample 5). They are not presented as outputs generated through this site and their resolution differs from the 720p output format. Watch pages: /examples/sample-1 through /examples/sample-6.

## Reviewing a result

Watch the start, middle and end instead of judging only a thumbnail. Check the face during head turns, hands and the speaker, clothing, crowd details, camera framing and audio timing. If playback looks wrong, compare the downloaded MP4. A stretched image may need correct aspect-ratio playback rather than another generation. Check the task status before retrying; uncertain tasks can remain reserved while support investigates. A completed result with visual artifacts is different from a confirmed failed task.

After checking the result, download it before the 30-day storage period ends. Save the MP4 to your device, then upload it to TikTok or another app yourself. Add captions or trim it in an editor if needed. The studio does not post to your social account. Label the shared clip as AI-generated and use images, footage and music you are authorized to share.

## Limits and privacy

No claim that Seedance or another model is best for this trend. No model selector, custom prompt, alternate scenes or automatic social posting. AI can alter facial features, anatomy, clothing and motion. Exact likeness and frame matching are not guaranteed. Independent service with no official affiliation with Bulin 47, Kie or model providers. No footage, music or likeness rights are granted by the service.

Photos and results are private to the account. Photos are retained up to 7 days and completed videos for 30 days. Providers process data under their own policies. https://bulin47.online/privacy

## Español

El estudio usa Seedance 2.5 mediante Kie para crear un MP4 de 10 segundos, 720p y 9:16 a partir de un retrato y una referencia fija. La referencia original dura 23.15 segundos, mide 720×1250 y tiene audio; se usan sus primeros 10 segundos. El audio correspondiente se añade después de generar el video mediante FAL. Se requiere Google y un crédito de pago. Los seis ejemplos duran 6 segundos, son de 360×640 y no tienen audio. No son resultados de este sitio. La semejanza y el movimiento pueden variar.

La referencia, el prompt y el audio están preparados: no necesitas grabarte ni elegir un modelo. Revisa y descarga el resultado privado; después puedes subirlo a TikTok o añadir subtítulos en un editor. Para otras escenas o ajustes personalizados, comprueba los modos de referencia de otras herramientas. No se afirma que todo el mundo use un mismo generador.

## 中文

工作室通过 Kie 的 Seedance 2.5，以一张人像和固定参考生成10秒、720p、9:16 MP4。原始参考片为23.15秒、720×1250且带音轨，默认采用前10秒；生成后通过 FAL 合成同一段参考音频。使用 Google 登录并消耗付费生成次数。六条展示样例为6秒、360×640无音轨视频，不声称由本站生成。AI 的外貌与动作效果可能变化。

动作参考、提示词和音轨已准备好，无需自己拍摄或选择模型。检查并下载私有成品后，可自行上传到 TikTok 或先用剪辑工具添加字幕。如果需要其他场景或自定义参数，请核查其他工具的参考输入模式。仅凭成品不能判断所有人都使用同一个生成工具。