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Calculadora de Bitrate e Tamanho de Arquivo de Vídeo (H.264, H.265, AV1)

Converta entre bitrate de vídeo, tamanho de arquivo e duração para H.264, H.265, AV1 e ProRes em qualquer resolução e FPS. Tabela de bitrate recomendado para upload e arquivamento.

Duração (mm:ss ou segundos) ex.: 10:00 ou 600

Resolução

Taxa de quadros (fps)

Codec

Taxa de bits de áudio (kbps)

Taxa de bits recomendada

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Tamanho do arquivo: — · Total (vídeo + áudio): — Mbps

Codec	Taxa de bits (Mbps)	Tamanho do arquivo	Cabe em

Como o cálculo funciona

Tamanho do arquivo = (taxa de bits de vídeo + taxa de bits de áudio) × duração / 8, em bytes. As taxas recomendadas seguem as diretrizes do YouTube e de transmissão para H.264/H.265/AV1; o ProRes usa a tabela de taxa de dados publicada pela Apple. 60 fps recebe um multiplicador de ~1,5×, 120 fps de ~2×.

ProRes é um codec intermediário intra-quadro — muito maior que os codecs de entrega, mas ideal para edição.

Como o cálculo funciona

File size = (video bitrate + audio bitrate) x duration / 8. The recommended bitrate itself is a lookup rather than a formula: each codec carries a table of Mbps per resolution. H.264 is 8 Mbps at 1080p and 45 at 4K UHD, H.265 is 5 and 25, AV1 is 4 and 20, ProRes 422 is 147 and 492. Frame rate then applies a multiplier, 1.0 up to 30 fps, 1.5 at 60 fps and 2.0 at 120 fps.

Resolution and codec move the number furthest. Duration accepts mm:ss, hh:mm:ss or plain seconds and starts at 10:00; Resolution spans 480p to 8K UHD with 1080p selected; Codec defaults to H.264 (AVC). Audio bitrate defaults to 192 kbps and is added to the video rate before the size is worked out, which is why the headline Mbps and the total underneath differ. All five codecs appear in the table simultaneously for comparison.

These are published-guideline starting points, not encoder output. Real file size depends on how much motion and fine detail a shot contains, whether you encode at constant or variable bitrate, and which preset and quality target you choose, so a static talking head at 1080p H.265 will land well under 5 Mbps. The ProRes rows are fixed data rates and therefore dependable; the H.264, H.265 and AV1 rows are estimates that any two-pass encode will beat or miss.

Perguntas Frequentes

What bitrate should I use for 1080p at 60fps?

The tool applies a 1.5x frame-rate multiplier above 30 fps, so H.264 rises from 8 to 12 Mbps at 1080p60, H.265 from 5 to 7.5 Mbps and AV1 from 4 to 6 Mbps. At 120 fps the multiplier becomes 2.0 instead.

How much smaller is H.265 than H.264 at the same quality?

In the built-in table H.265 sits at roughly 60% of the H.264 rate and AV1 at about half. At 4K UHD that reads 45 Mbps for H.264, 25 Mbps for H.265 and 20 Mbps for AV1, for a comparable picture.

Why are ProRes files so much bigger?

ProRes is an intra-frame editing codec: every frame is compressed independently, with no reference to neighbouring frames. At 1080p the tool lists ProRes 422 at 147 Mbps and ProRes 4444 at 220 Mbps, against 8 Mbps for H.264 delivery.

Does the audio bitrate count towards the file size?

Yes. The audio figure in kbps is divided by 1,000 and added to the video bitrate before duration is applied. The big number shows video only, while the line beneath it reports the combined video-plus-audio rate actually used for the size.

How do I enter a two-hour runtime?

Type 2:00:00, or 120:00 for minutes and seconds, or 7200 for raw seconds. The duration parser handles all three: two colons are read as hours, minutes and seconds, one colon as minutes and seconds, and a bare number as seconds.

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Calculadora de Bitrate e Tamanho de Arquivo de Vídeo (H.264, H.265, AV1)

Como o cálculo funciona

Perguntas Frequentes

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