À propos des fichiers H265

H265 (H.265/HEVC Raw Stream · Format vidéo)

Lancement 2013 Par ITU-T VCEG + ISO/IEC MPEG (JCT-VC)

H.265/HEVC Raw Stream (.h265) est un format de fichier pris en charge par KaijuConverter pour l’archivage, l’échange professionnel et la conversion multiplateforme.

Famille

Video Files

Extension

.h265

Type MIME

video/h265

Utilisable comme

Entrée

L'histoire

COMMENT H265
A VU LE JOUR.

2013

2015

H.265 — also called HEVC (High Efficiency Video Coding) — was ratified in April 2013 by the Joint Collaborative Team on Video Coding. Its mission: 50% better compression than H.264 at equivalent quality. At the cost of ~10× encoding complexity and more aggressive patent fees, it delivered.

HEVC’s adoption was slowed not by technology but by a patent standoff. Three separate patent pools (MPEG LA, HEVC Advance, Velos Media) demanded fees, and several major patent holders stayed outside all three. That licensing chaos is the direct reason AV1 exists: Google, Amazon, Netflix, Meta, and Mozilla founded the Alliance for Open Media in 2015 specifically to avoid HEVC fees. HEVC still dominates where hardware decode matters (every Apple device, every smart TV, every iPhone 7+ recording, 4K Blu-ray) but its web footprint is a fraction of what H.264 enjoys.

CURIOSITÉS ET
ANECDOTES.

Apple's 2017 decision to adopt HEVC on every iPhone made it the "default" codec for a billion cameras overnight.

Three separate HEVC patent pools (MPEG LA, HEVC Advance, Velos Media) with overlapping claims is why AV1 was born — the patent mess scared the web off.

Every 4K Blu-ray Ultra HD disc uses HEVC for its main video stream.

HEVC encoding is 5-10× slower than H.264 — which is why AV1, though mathematically better, is even slower still.

Main 10 profile (10-bit HDR) is the baseline for 4K HDR content on streaming services.

POINTS FORTS ET
LIMITES.

Points forts

~50% smaller files than H.264 at equivalent quality.
HDR (HDR10, HLG, Dolby Vision) first-class support.
Up to 8K resolution and beyond in the spec.
Hardware decode on every iPhone, most smart TVs, and most 2018+ GPUs.
Main 10 profile (10-bit) standard for streaming 4K HDR.

Limites

Patent licensing is a fragmented mess — three pools with incompatible terms.
Encoding is 5-10× slower than H.264.
Apple-ecosystem heavy — web browsers outside Safari have been reluctant.
AV1 is gradually replacing HEVC for royalty-free streaming.

Tailles et poids typiques

1080p @ 3 Mbps (1 min)

~22 MB

4K HDR @ 15 Mbps (1 min)

~112 MB

4K Ultra HD Blu-ray (2 hours)

50-100 GB

Spécifications techniques

MIME type: video/hevc
Extensions: .h265, .265, .hevc (raw bytestream)
Standard: ITU-T Rec. H.265 / ISO/IEC 23008-2 (HEVC)
Typical containers: MP4, MKV, MOV, TS, HEIF (still images)
Profiles: Main, Main 10, Main 4:2:2, Main 4:4:4, Monochrome, High Throughput

CONVERTIR DEPUIS
H265

h265 jpg h265 png h265 webp h265 gif h265 bmp h265 mp4 h265 mov h265 mkv h265 avi h265 webm h265 flv h265 wmv h265 mpeg h265 3gp h265 mp3 h265 wav h265 flac h265 aac h265 m4a h265 ogg h265 opus h265 wma h265 ogv h265 m4v h265 ts h265 asf h265 dv h265 f4v h265 h264 h265 m2v h265 mjpeg h265 mxf h265 rm h265 rmvb h265 divx h265 nut h265 y4m

CONVERTIR EN
H265

asf h265 dv h265 f4v h265 h264 h265 m2v h265 mjpeg h265 mxf h265 rm h265 rmvb h265 divx h265 nut h265 y4m h265

Cas d'usage courants

Ultra HD encoding, 4K/8K video pipelines, next-gen broadcast