A página da ferramenta diz local, sem envio, sem IA. O código segue essa frase. O WebCodecs decodifica quadros, um módulo WebAssembly reamostra e o WebCodecs codifica o resultado. Os filtros são Lanczos3, bicúbico e bilinear. O contraste das bordas é um Laplaciano 3×3 pequeno: natural, sutil ou nítido.
A página da ferramenta diz local, sem envio, sem IA. O código segue essa frase. O WebCodecs decodifica quadros, um módulo WebAssembly reamostra e o WebCodecs codifica o resultado. Os filtros são Lanczos3, bicúbico e bilinear. O contraste das bordas é um Laplaciano 3×3 pequeno: natural, sutil ou nítido. O filtro não acrescenta rostos, letras ou textura que não estavam no quadro.
Os presets de qualidade são Melhor (Lanczos3), Equilibrado (bicúbico) e Rápido (bilinear). Os destinos são 1080p, 1440p, 4K UHD, 2× e um tamanho próprio dentro dos limites do controle. As opções de um caso são os controles usados, não uma lista de presets que ninguém executou.
A reamostragem atual trabalha com quadros SDR de 8 bits. HDR e cor de 10 bits não são um caminho prometido. O áudio compatível é copiado quando o contêiner de saída consegue carregá-lo. As tags comuns ficam de fora quando “Remover metadados” continua marcado, que é o padrão.
Quadros maiores em geral geram um arquivo maior. As contagens de bytes de cada caso são os tamanhos capturados. Esta página não transforma isso numa nota de qualidade. SIMD é usado quando o navegador tem; não é uma taxa medida para cada visita.
Isto não é ampliação generativa nem por difusão.
Um número de tempo só aparece se a sonda daquele caso o registrou.
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
Quadros pareados e recortes de detalhe
Estas imagens são os quadros pareados ou os recortes de detalhe salvos com este caso. Uma largura ou altura diferente é o redimensionamento matemático registrado, não um detalhe novo.
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.
Limites registrados neste 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 tela da sessão
Entrada · settings visible · 1120×571. Video upscaler for cpk-lab-cc0-chart-motion-sine-320x240.mp4. Target text 640 × 480. Quality high. Sharpen off.Processando · running progress 0% · 1120×806. upscaling-lab-chart-sine-lanczos3-2x while the page showed running progress 0%.Saída · 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
Quadros pareados e recortes de detalhe
Estas imagens são os quadros pareados ou os recortes de detalhe salvos com este caso. Uma largura ou altura diferente é o redimensionamento matemático registrado, não um detalhe novo.
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.
Limites registrados neste 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 tela da sessão
Entrada · settings visible · 1120×571. Video upscaler for mc-vid-h264-aac-1s.mp4. Target text 128 × 128. Quality high. Sharpen off.Processando · running progress 0% · 1120×806. upscaling-mc-vid-001-limitation while the page showed running progress 0%.Saída · result visible · 1120×818. Video upscaler result for mc-vid-h264-aac-1s.mp4.
