The Goal: Help low VRAM users (under 12GB) push their videos to 1080p and beyond—keeping the motion smooth, the quality sharp, and the audio perfectly synced without breaking your GPU.
V3.0 - Major update to the workflow
Add VOSR2 to to enhance the quality.
Use RTX to upscale the video to 1080p.
Frame interpolation to mulitply the frame rate.
Add Switch button on the Subgraph panel for each enhance step.
Update quick guide in the workflow.
Make sure switch OFF anything unwanted before click RUN.
VOSR2 is a brand-new tech for boosting image quality. While made for photos, it works like magic on video. That said, trying a massive upscale right out of the box will almost 100% crash your GPU with an OOM (Out of Memory) error if you're under 12GB VRAM. (A 15-second 1080p clip could literally take over an hour).
【The Hack】: First, shrink your 480p video by 50%, then let VOSR2 scale it back up by 2x.
* The Result: You keep the exact same resolution but get a massive jump in clarity and details.
* Render Time: Around 4 minutes total—totally worth it.
* 💡 Pro-Tip for Saving VRAM (Tile Settings):
The *Tile sizing** in this node (defaults to 512 / 64 / 512 / 64) chops up the frame during generation to save your graphics memory.
* If your card is still struggling, you can drop these values down to 256 / 32 / 256 / 32. Just keep in mind that this will hit your final image quality.
Honestly, *sticking to the default 512 gives the absolute best results** based on testing.
VOSR2 是目前用來提升畫質的新技術（原用於相片，拿來修復影片效果也很棒）。但對於低 VRAM 用家來說，直接用它來做「高倍率放大」極不現實（12GB VRAM 以下幾乎 100% 會 OOM 記憶體崩潰，生成 15 秒 1080p 影片可能耗時超過 1 小時）。
【折衷方案】：先將 480P 影片**縮小 50%**，再用 VOSR2 放大 2 倍。
* 效果：維持原解析度不變，但畫質得到顯著修復與提升。
* 耗時：總生成時間約 4 分鐘，在可接受範圍內。
* 💡 Low VRAM 關鍵節點參數設定：
節點中的 *Tile 參數**（預設值為 512 / 64 / 512 / 64）是用於生成時將畫面切塊處理以節省 VRAM。
* 如果依然遇到 VRAM 不足，可將其調低至 256 / 32 / 256 / 32，但此舉會犧牲部分畫質。
根據目前測試，*維持預設的 512 效果最為理想**。
SWITCH IT OFF on the panel if you feel too slow in generation, and everything unchange.
如果生成速度太慢, 在面板關掉它, 然後用回先前的方案。
Special thanks to the node creator: ylchen333👏
V2.1 - Minor update to the workflow
add switch to all three function among RTX/ upscale with model/ frame interpolation
add reserved VRAM to avoid OOM
For Low VRAM user, if you meet OOM in upscale 15s video, you might disable upscale with model and scale x 2.25 in RTX, megapixels = 3.7 and continue the frame interpolation.
i.e. your original video resolution x 2.25 = almost 1080p
most low VRAM user will use 480p(0.4mp) as the orginal resolution during generation
and 1080/480 = 2.25
of course this figure you might fine tune by yourself.
V2.1 - 工作流小幅更新
為 RTX / 模型放大（Upscale with model） / 補幀（Frame interpolation）這三項功能全部加入獨立開關。
增加預留顯存（VRAM）功能，以避免記憶體溢出（OOM）崩潰。
針對低顯存（Low VRAM）用戶的建議：
如果在放大 15 秒的影片時遇到 OOM 崩潰，可以嘗試關閉「模型放大」。
並在 RTX 中將縮放倍率設為 2.25 倍（百萬像素 Megapixels = 3.7），然後繼續進行補幀。
註：您的原始影片解析度乘以 2.25 倍，大約就等於 1080p。
大多數低顯存用戶在生成時，會使用 480p（0.4mp）作為原始解析度。
而 1080 除以 480 剛好等於 2.25。
當然，這個數值您也可以根據自己的情況進行微調。
V2.0 - Major update to the workflow
add frame interpolation function in the subgraph
exchange the upscale order.
add several button on the subgraph interface let user make their option.
frame interpolation could be switch off by this button as shown below.
provide link to download interpolation model.
V2.0更新
加入frame interpolation 功能
更改放大的順序由先完成RTX改成完成upscale with model 後再做RTX修復
在subgraph中增加frame interpolation開關提供用家選擇
frame interpolation可以用下方圖中的按鈕開關
提供下載連接
V1.1 - Minor update to the workflow.
Minor update to the workflow.
Add last frame generate after video upscaled.
This was supposed to be included in the workflow for the next update of Minimax H3 workflow, but I feel like some users would just upscale every single output right after generating it.
小更新
在影片upscale後加入自動生成last frame.
本來應該加在Minimax H3下次更新的Workflow中
但總覺得有用家會每生成一條就立即upscale
Simple workflow for Low VRAM user. (Extreme FAST)
This workflow isn't limited to MiniMax H3 users—those running Wan2.2 and LTX-Video 2.3 can use it exactly the same way.
Just a quick heads-up: if your video has no audio, remember to disconnect the Audio link from the Load Video node, otherwise you'll get an error.
Once again, what I'm sharing today is an ultra-simple workflow. It follows my usual style: simple, practical, completely spaghetti-free, and 100% Low VRAM friendly.
I’ve covered the rest of the details directly inside the workflow, so I won't repeat them here.
Low VRAM專用放大影片Workflow. (極快)
不限於Minimax H3 用家, Wan 2.2 和LTX 2.3的用家同樣可用
沒聲音的影片記得斷開Load Video 中Audio的連接, 不然會報錯
今次分享的亦是超簡單Workflow。
亦遵循我一貫作風, 簡單, 實際, 不會意粉化, Low VRAM能用
其他詳細在workflow中有說明就不再重覆了
How to merge videos with FFmpeg in ComfyUI Desktop (2026)?
https://civarchive.com/articles/34119/how-to-merge-videos-with-ffmpeg-in-comfyui-desktop-2026
Special thanks to Dasiwa👏
Minimax H3 Multi Ref workflow for low VRAM
https://civarchive.com/models/2862009/minimax-h3-multi-ref-workflow-for-low-vram
This is a simple workflow for VoxCPM2, featuring a single-speaker setup and a multi-speaker setup.
這是作為輸助語音生成VoxCPM2的Workflow
https://civarchive.com/models/2865730/voxcpm2-simple-workflow-for-low-v-ram
I've also written an article about VoxCPM2—feel free to check it out if you're interested!
還有關於VoxCPM2的文章, 有興趣可以看看
Krea 2 Quadview Simple workflow
Qaudview might lock the character appearence during mulit reference in long video generation.
Krea 2 多角度參考圖 Workflow
多角度參考圖可以在影片生成時鎖死角色外表, 特別在長片分多次生成中作為參考圖使用
https://civarchive.com/models/2867878/krea-2-quadview-simple-workflow-for-low-vram
Krea 2 Control Net Simple Workflow for low VRAM
https://civarchive.com/models/2869504/krea-2-control-net-simple-workflow-for-low-vram
Description
Add VOSR2 to enhance quality.
reconstruct the subgraph panel.
Switch off anything if you dont want it.