Lesson 4 · 19 min
With the approved still, the generator already knows who, where and what light. The prompt now only says what changes: the camera movement, the action and the sound. With first and last frame, you also decide where the shot ends. And before moving on, the page checks the clip.
Start the lesson
Goal: animate an approved still with a motion-only prompt and check the clip on the page before moving on.
Six steps. Click each one.
If the clip changes the character or the light, go back to the motion prompt: it's probably describing the scene again.
The example is shot 4 of "The first batch": close-up, low camera, dolly in, 4 s.
In image-to-video mode, the still is the starting point. Write the camera movement, the action that happens and the sound, nothing else.
If the result comes out static, name the movement and the speed ("slow dolly in"). If it comes out chaotic, take out actions: one per shot.
Slow dolly in. The oven door opens and steam rises against the light. Sound: creak of the door and hiss of the steam.
With two frames, the generator creates the path between them. It works for action with a set ending: the peel goes in empty and comes out with the bread.
As of Oct 2026 it exists in Veo 3.1 and in Luma's Ray3 Modify; on the open path, there are official first and last frame templates for Wan 2.2 and LTX-2.5 in ComfyUI (lesson 7).
Google Developers Blog (Veo 3.1); TechCrunch, 12/18/2025 (Ray3 Modify); ComfyUI and LTX documentation (checked on 10/19/2026).
When the action continues in the next shot, use the last frame of the previous clip as the first frame of the next one. The light and the position of things carry over.
To grab the last frame: pause the clip at the end and export the frame in your editor. If you use a terminal, the command is in the block below.
Duration within the request, width of at least 1280 pixels, and a 16:9 aspect ratio, the same as the scene. A vertical or square clip in the middle of a 16:9 scene turns into black bars in the edit.
What the page doesn't measure, you check by eye: is the character the same? is the movement what you asked for? If not, generate again before moving on to the next shot.
The sheet for the animated shot and, for those who use a terminal, the command that grabs the last frame.
Shot: <number and line of the shot list> First frame: <file of the approved still> Last frame: <file, or "none"> Motion prompt: <camera movement. action. sound.> Requested duration: <seconds> Generator: <name and version (Oct 2026)> Clip: <plano-NN.mp4>
ffmpeg -v error -y -sseof -0.1 -i plano-03.mp4 -frames:v 1 ultimo-quadro-03.png
First, the rehearsal: the two examples are clips made from a photo, without a generator. Then choose your own.
Choose the clip for your shot. It is read here in the browser: nothing is uploaded.
Only for those who already use a terminal and have ffmpeg installed (ffprobe reads the video). Download the course from GitHub and run it in its folder: the rules are the same as on the page. For your clip, replace --exemplo with its name (plano-04.mp4); it exits 0 when it passes.
python3 conferir.py movimento --exemplo; echo "saída: $?" python3 conferir.py movimento --errado; echo "saída: $?"
$ python3 conferir.py movimento --exemplo; echo "saída: $?" OK: 6,0 s · 1280×720 · 16:9 saída: 0
$ python3 conferir.py movimento --errado; echo "saída: $?" Ainda não. O que falta: - O vídeo tem 2,0 s; o pedido é de 3 a 15 s. - O vídeo é 720×720 (1:1); o pedido é 16:9. - O vídeo tem 720 px de largura; o mínimo é 1280 px. saída: 1
Generating is done with whatever tool you have. The rehearsal comes first and costs nothing.
Under "Check your clip," click "Example that passes" and then "Example with an error." Read what the page says about the second one: it's the kind of message you'll see if your clip comes out in the wrong format.
Done when: the page answers OK: 6.0 s · 1280×720 · 16:9 for the example that passes and, for the example with an error, lists the duration, aspect ratio and width.
Choose an approved still from lesson 3. Fill in the movimento.txt, generate the clip in 16:9 in whatever generator you have (closed or open) and download it with the shot number. Choose the file under "Check your clip."
Done when: the page answers OK: [s] s · [w]×[h] · 16:9 for your clip, with a duration between 3 and 15 s, and the clip and the movimento.txt are in the project folder.
Four questions. The explanation shows up after each answer.
Question 1 of 4
What should you write in the prompt when the still already exists?
Question 2 of 4
When do the first and last frame help most?
Question 3 of 4
The page said your clip is 9:16, in a scene that is all 16:9. What do you do?
Question 4 of 4
What can the page NOT check in your clip?
Pick an answer. The explanation appears after you try.