HEVC (H.265) is a video compression standard that achieves half the bitrate of H.264 at equivalent image quality.
HEVC stands for High Efficiency Video Coding and refers to a video compression standard that is also known under the names H.265 (ITU-T) and MPEG-H Part 2 (ISO/IEC). It is not a lighting or grip device, but a codec technology from the realm of camera/recording and post-production. HEVC was jointly developed by the ITU-T VCEG and ISO/IEC MPEG (in the Joint Collaborative Team on Video Coding, JCT-VC) and adopted in 2013.
HEVC is the successor to H.264/AVC and pursues the same goal: the highest possible image quality at the lowest possible data rate. The key advantage is efficiency – HEVC achieves comparable image quality to H.264 at about half the data rate.
HEVC replaces the rigid macroblock structure of H.264 with flexible Coding Tree Units (CTUs), which can process significantly larger block sizes. Large, uniform image areas are compressed with a few large blocks, while detailed edges and textures are handled with smaller blocks. Additionally, there are more intra-prediction modes than in H.264, which further increases efficiency.
| Feature | H.264 / AVC | HEVC / H.265 |
|---|---|---|
| Data Rate at Equal Quality | Reference | approx. 50% lower |
| Block Architecture | Macroblocks (max. 16 × 16) | Coding Tree Units (up to 64 × 64) |
| Maximum Resolution | 4K range | up to 8K UHD |
Many current cameras offer HEVC as a recording format, often in conjunction with 10-bit 4:2:2 recording. The codec is primarily used here to capture high-resolution material (UHD/4K and higher) at a moderate data rate and small file sizes on memory cards. Canon, for example, offers a variant as XF-HEVC (H.265 in an MXF container) in cinema and professional camcorders.
HEVC, as a delivery and recording format, is highly compressed and – depending on the implementation – computationally intensive to decode. For actual editing, HEVC material is therefore converted into an edit-friendly intermediate format like ProRes in many workflows, as such intermediate codecs are designed for smooth editing rather than minimal file size. For distribution and streaming, however, HEVC fully leverages its bandwidth efficiency.
Beim Monitoring am Set kann ich dank HEVC-Hardware-Decoder in modernen Rekorder-Monitoren Live-Proxies in 4K-Qualität bei nur 25 Mbit/s betrachten, ohne Latenz oder Qualitätsverlust. Die 10-Bit-Unterstützung von HEVC Main 10 Profile ermöglicht mir präzise Belichtungskontrolle im Log-Workflow, da Banding-Artefakte auch bei starken Korrekturen vermieden werden. Besonders bei Available-Light-Szenen profitiere ich von der effizienten Kompression dunkler Bildbereiche.
Für meine Remote-Sessions mit dem Editor übertrage ich HEVC-komprimierte Dailies in nativer 4K-Qualität über Standard-Internetverbindungen, wodurch ich präzise Schnittentscheidungen bereits während der Dreharbeiten treffen kann. Die geringe Latenz bei der Hardware-Dekodierung erlaubt mir flüssige Scrubbing-Vorgänge durch komplexe VFX-Sequenzen. Bei Farbentscheidungen sehe ich dank 10-Bit-HEVC bereits am Set das finale HDR-Bild, ohne auf zeitaufwändige Transcoding-Prozesse warten zu müssen.
HEVC reduziert meine Cloud-Storage-Kosten für Archivierung um 55% gegenüber H.264, bei einer 120-Minuten-4K-Produktion spare ich etwa 15.000 Euro jährlich an Speichergebühren. Die Hardware-Acceleration in modernen Workstations halbiert die Renderzeiten im Vergleich zu software-basierten Codecs, wodurch sich Post-Production-Zyklen um 2-3 Tage verkürzen. Für internationale Vertriebskopien benötige ich dank HEVC nur noch 35 TB statt 80 TB Bandbreite pro Delivery.
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