TEMPORARY MEDIA WORKSPACE / VIDEO RESIZER
Scale video to a selected maximum height without stretching its aspect ratio, then download a compatible H.264 MP4.
The processor required by this tool is available, and this worker can accept a temporary job.
Step 1 / source
Source intake
Choose the video whose pixel dimensions you want to reduce or standardize.
Checking publication status before file selection...
The selected bytes are sent only to the Nirmion media API for this request. Processing uses a private temporary workspace rather than permanent catalogue storage.
Server-side source and result files are removed when the response stream closes. Re-downloads use the result Blob retained only in this browser tab.
Nirmion writes a separately named result containing nirmion_tools and never overwrites the selected source file.
Know the product contract
Every media page documents the accepted source, the selected FFmpeg transformation, the output container, and the limits that can affect the job.
Check the source dimensions. Enlarging low-resolution footage cannot recover detail that is not present.
FFmpeg scales the video within the chosen height while preserving aspect ratio, then encodes H.264 video and available AAC audio.
Use the measured dimensions in the result card to verify the actual aspect-ratio-preserving output.
Plain-language method
Downscaling removes pixel detail and re-encoding is lossy. Upscaling changes dimensions but does not create genuine sharpness.
Check the source dimensions. Enlarging low-resolution footage cannot recover detail that is not present.
Choose the lowest height that still keeps text, faces, and interface details readable for the destination.
Use the measured dimensions in the result card to verify the actual aspect-ratio-preserving output.
Useful when
Before processing
Container and codec
The result is MP4 with H.264 video. Aspect ratio is preserved, so width varies with each source rather than forcing one fixed canvas.
Know the boundary
A lower resolution often reduces size but does not guarantee a specific byte count. Use Video Compressor when the primary goal is stronger size reduction.
Quick answers
These answers describe the actual upload, FFmpeg processing, download, and temporary-retention contract.
No. Width is derived from the source aspect ratio.
No. A larger pixel canvas cannot recreate missing source detail.
The result uses H.264 video in an MP4 container with AAC audio when available.