Redimensionei o vídeo para a resolução máxima da TV, usando o ffmpeg :
ffmpeg -i TheWorld.mp4 -s 3840x2160 -acodec copy test.mp4
Como alternativa, o filtro de vídeo em escala pode ser usado em vez de -ss
. Forneça o valor para um eixo e o filtro fornecerá o outro enquanto preserva a proporção:
ffmpeg -i TheWorld.mp4 -vf scale=3840:-2 -acodec copy test.mp4
Aparentemente, "4K" é um equívoco, já que a TV é, na verdade, QFHD :
QFHD stands for Quad Full High Definition and it’s exactly four times the resolution of 1080p. QFHD or Quad HD measures 3840 x 2160 pixels, and it’s a digital television format with the same widescreen 16:9 aspect ratio you are used to watching at home. QFHD is literally like combining four (two-by-two) 1080p TVs together.
Many manufacturers are marketing their QFHD products as being 4K, which has now become a catchall phrase. So if you hear about a 4K TV, the resolution would actually be 3840 x 2160, i.e. Quad HD.