Lanczos3, bicúbico y bilineal cambian el tamaño con un filtro. El informe no habla de IA generativa. La página de la herramienta dice local, sin subida, sin IA. El código sigue esa frase. WebCodecs decodifica fotogramas, un módulo WebAssembly los remuestrea y WebCodecs codifica el resultado.
Lanczos3, bicúbico y bilineal cambian el tamaño con un filtro. El informe no habla de IA generativa.
La página de la herramienta dice local, sin subida, sin IA. El código sigue esa frase. WebCodecs decodifica fotogramas, un módulo WebAssembly los remuestrea y WebCodecs codifica el resultado. Los filtros son Lanczos3, bicúbico y bilineal. El contraste de bordes es un Laplaciano 3×3 pequeño: natural, sutil o nítido. El filtro no añade caras, letras ni textura que no estuvieran en el fotograma.
Los ajustes de calidad son Mejor (Lanczos3), Equilibrado (bicúbico) y Rápido (bilineal). Los destinos son 1080p, 1440p, 4K UHD, 2× y un tamaño propio dentro de los límites del control. Las opciones de un caso son los controles usados, no una lista de ajustes que nadie ejecutó.
El remuestreo actual trabaja con fotogramas SDR de 8 bits. HDR y color de 10 bits no son una vía prometida. El audio compatible se copia cuando el contenedor de salida puede llevarlo. Las etiquetas ordinarias se omiten si «Quitar metadatos» sigue marcado, que es el valor inicial.
Los fotogramas más grandes suelen hacer un archivo más grande. Los bytes de cada caso son los tamaños capturados. Esta página no los convierte en una nota de calidad. SIMD se usa cuando el navegador lo tiene; no es una tasa medida para cada visita.
No es un escalado generativo ni por difusión.
Una cifra de tiempo solo aparece si la sonda de ese caso la registró.
Generated CC0 lab input via tests/helpers/video-acceptance.mjs makeSyntheticMp4 (testsrc 320x240, 15 fps, 2 seconds, sine 440 Hz). This is an original lab input, not a product output and not a real-world recording.
{"videoStart":0,"videoEnd":2,"audioStart":-0.02322,"audioEnd":2,"startDriftSec":0.02322,"endDriftSec":0,"scope":"this clip only; not a general A/V sync guarantee"}
This download probed as h264 with aac audio. Output is 122742 bytes and the input fixture is 36625 bytes. The output file is larger than the input on this clip. The output audio stream is present on this clip. Packet start drift 0.02322s is for this clip only. Elapsed 947ms is for this environment only. Output is 640x480 and input is 320x240. Dimensions increased by resampling. This does not show recovered detail.
publicClaims
["This download probed as h264 with aac audio.","Output is 122742 bytes and the input fixture is 36625 bytes. The output file is larger than the input on this clip.","The output audio stream is present on this clip.","Packet start drift 0.02322s is for this clip only.","Elapsed 947ms is for this environment only.","Output is 640x480 and input is 320x240. Dimensions increased by resampling. This does not show recovered detail."]
{"videoStart":0,"videoEnd":2,"audioStart":-0.02322,"audioEnd":2,"startDriftSec":0.02322,"endDriftSec":0,"scope":"this clip only; not a general A/V sync guarantee"}
{"method":"Relative box at 8% from the left and 12% from the top, covering 40% by 40% of each frame. The output crop was scaled down to the input crop pixel size with sharp lanczos3 as a reading aid.","productStep":false,"qualityScore":false}
observedStates
[{"t":1790925450460,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925450590,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925451686,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925451745,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925451915,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925451979,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925452552,"phase":"","rowState":"","busy":false,"progress":"0% Frame 0 of 30"},{"t":1790925452703,"phase":"","rowState":"","busy":false,"progress":"63% Frame 18 of 30 · 23.4 FPS"},{"t":1790925452779,"phase":"","rowState":"","busy":false,"progress":"100% Frame 29 of 30 · 34.3 FPS"},{"t":1790925452814,"phase":"","rowState":"","busy":false,"progress":"100% Frame 30 of 30 · 34 FPS"},{"t":1790925452976,"phase":"","rowState":"","busy":false,"progress":"100% Frame 30 of 30 · 34 FPS"}]
{"observedUnique":10,"violations":[],"scope":"Observed requests in this run only. Not a universal no-exfiltration certificate."}
pageErrorCount
0
Fotogramas emparejados y recortes de detalle
Estas imágenes son los fotogramas emparejados o los recortes de detalle guardados con este caso. Un cambio de ancho o de alto es el reescalado matemático registrado, no detalle nuevo.
Decoded input frame from this clip.Browser-output frame from this clip.
Decoded input frame and browser-output frame from this clip.
Input crop from the same relative box, kept as a reading aid.Browser-output crop from the same relative box, kept as a reading aid.
Relative box at 8% from the left and 12% from the top, covering 40% by 40% of each frame. The output crop was scaled down to the input crop pixel size with sharp lanczos3 as a reading aid. This pair is a reading aid.
Límites registrados en este caso
The upscaler control is mathematical resampling (Lanczos3, bicubic, or bilinear), not a generative model.
Capture instrumentation aborts known preexisting Cloudflare telemetry at static.cloudflareinsights.com and /cdn-cgi/rum before transmission. That block is not evidence that production has no analytics.
Capturas de pantalla de la sesión
Entrada · settings visible · 1120×571. Video upscaler for cpk-lab-cc0-chart-motion-sine-320x240.mp4. Target text 640 × 480. Quality high. Sharpen off.Proceso · running progress 0% · 1120×806. upscaling-lab-chart-sine-lanczos3-2x while the page showed running progress 0%.Salida · result visible · 1120×818. Video upscaler result for cpk-lab-cc0-chart-motion-sine-320x240.mp4.
tests/fixtures/media-corpus manifest MC-VID-001, constructed by scripts/generate-media-corpus.mjs. CC0-1.0 constructed original. Not regenerated by this capture.
{"videoStart":0,"videoEnd":1,"audioStart":-0.064,"audioEnd":1,"startDriftSec":0.064,"endDriftSec":0,"scope":"this clip only; not a general A/V sync guarantee"}
This download probed as h264 with aac audio. Output is 6097 bytes and the input fixture is 7209 bytes. The output byte count is not larger than the input on this clip. The output audio stream is present on this clip. Packet start drift 0.064s is for this clip only. Elapsed 352ms is for this environment only. Output is 128x128 and input is 64x48. Dimensions increased by resampling. This does not show recovered detail.
publicClaims
["This download probed as h264 with aac audio.","Output is 6097 bytes and the input fixture is 7209 bytes. The output byte count is not larger than the input on this clip.","The output audio stream is present on this clip.","Packet start drift 0.064s is for this clip only.","Elapsed 352ms is for this environment only.","Output is 128x128 and input is 64x48. Dimensions increased by resampling. This does not show recovered detail."]
{"videoStart":0,"videoEnd":1,"audioStart":-0.064,"audioEnd":1,"startDriftSec":0.064,"endDriftSec":0,"scope":"this clip only; not a general A/V sync guarantee"}
{"method":"Relative box at 8% from the left and 12% from the top, covering 40% by 40% of each frame. The output crop was scaled down to the input crop pixel size with sharp lanczos3 as a reading aid.","productStep":false,"qualityScore":false}
observedStates
[{"t":1790925454580,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925454706,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925455192,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925455247,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925455412,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925455465,"phase":"","rowState":"","busy":false,"progress":"0% Starting local processing…"},{"t":1790925455699,"phase":"","rowState":"","busy":false,"progress":"100% Frame 11 of 12 · 37.2 FPS"},{"t":1790925455741,"phase":"","rowState":"","busy":false,"progress":"100% Frame 12 of 12 · 37.1 FPS"},{"t":1790925455875,"phase":"","rowState":"","busy":false,"progress":"100% Frame 12 of 12 · 37.1 FPS"}]
{"observedUnique":10,"violations":[],"scope":"Observed requests in this run only. Not a universal no-exfiltration certificate."}
pageErrorCount
0
Fotogramas emparejados y recortes de detalle
Estas imágenes son los fotogramas emparejados o los recortes de detalle guardados con este caso. Un cambio de ancho o de alto es el reescalado matemático registrado, no detalle nuevo.
Decoded input frame from this clip.Browser-output frame from this clip.
Decoded input frame and browser-output frame from this clip.
Input crop from the same relative box, kept as a reading aid.Browser-output crop from the same relative box, kept as a reading aid.
Relative box at 8% from the left and 12% from the top, covering 40% by 40% of each frame. The output crop was scaled down to the input crop pixel size with sharp lanczos3 as a reading aid. This pair is a reading aid.
Límites registrados en este caso
The upscaler control is mathematical resampling (Lanczos3, bicubic, or bilinear), not a generative model.
MC-VID-001 is 64x48, about 1 second, 12 fps, and 7209 bytes. It is a limitation case, not a quality benchmark.
Capture instrumentation aborts known preexisting Cloudflare telemetry at static.cloudflareinsights.com and /cdn-cgi/rum before transmission. That block is not evidence that production has no analytics.
Capturas de pantalla de la sesión
Entrada · settings visible · 1120×571. Video upscaler for mc-vid-h264-aac-1s.mp4. Target text 128 × 128. Quality high. Sharpen off.Proceso · running progress 0% · 1120×806. upscaling-mc-vid-001-limitation while the page showed running progress 0%.Salida · result visible · 1120×818. Video upscaler result for mc-vid-h264-aac-1s.mp4.
Preguntas frecuentes
¿Aparece detalle que no estaba en la toma?
El filtro no crea una escena nueva. Reescala la que hay.
