Understanding Video Codecs: H.264, HEVC, VP9 and ProRes Explained

Video is everywhere, from documentaries streaming over Australian lounge-room TVs to short films premiering at Adelaide's festival circuit. Behind every smooth frame sits a codec quietly compressing raw footage into files small enough to store, stream and share. Without these mathematical workhorses, modern viewing habits would collapse under the weight of uncompressed data.

For creators working out of Melbourne studios, YouTubers filming on Sydney's northern beaches, or editors at post-production houses in Brisbane, the choice of compression standard shapes everything from upload times to colour grading flexibility. A codec determines how much detail survives compression, how much hardware can accelerate playback, and which devices, cameras and platforms will accept the final file.

The four formats dominating today's pipelines are H.264, HEVC, VP9 and ProRes. Each one was engineered with different priorities in mind, whether that is universal compatibility, peak efficiency, royalty-free web delivery or near-lossless editing. Knowing what each codec does well, and where it falls short, helps Australian producers make smarter decisions about mastering, archiving and delivery.

Australia's National Broadband Network continues rolling out fibre and fixed-wireless services across regional towns, making higher-bitrate streaming feasible for households that once struggled with constant buffering. Still, with average evening speeds varying widely between Perth suburbs and remote Tasmanian communities, the codec used at the encoding stage has a direct effect on whether viewers see clean footage or compression artefacts.

H.264: the universal workhorse

H.264, also called AVC, has been the lingua franca of digital video for nearly two decades. It compresses files efficiently enough to stream over modest connections while remaining compatible with virtually every phone, tablet, smart TV and browser on the market. When a Sydney wedding videographer exports a highlight reel for clients, H.264 wrapped in an MP4 container is almost always the safest choice.

The codec handles a wide range of resolutions, frame rates and colour depths, which is why broadcast television, Blu-ray discs, security cameras and consumer camcorders all rely on it. Hardware decoders are baked into most chipsets, meaning playback is light on battery and CPU. For Australian content creators who need footage to play on everything from a friend's aging laptop to a 4K television in Adelaide, H.264 removes guesswork.

The trade-off is file size relative to newer standards. A one-hour 1080p programme can easily run past four gigabytes at high quality, which becomes expensive for cloud storage and slow to upload from regional centres with limited upload speeds. Bitrate efficiency has also been overtaken by more recent codecs, prompting many creators to consider the alternatives that follow.

HEVC: tighter compression for higher resolutions

HEVC, marketed as H.265, was designed as H.264's successor. It typically halves the bitrate required for a comparable image, which is why it has become the default codec for 4K Blu-ray, most HDR streaming catalogues and the latest action cameras. For filmmakers shooting in 8K along the Great Ocean Road or capturing wildlife documentaries in the Top End, HEVC makes high-resolution files practical to handle.

The technology achieves this efficiency through larger coding tree units and more sophisticated motion prediction, allowing each frame to be described with fewer bits. Streaming services delivered across the NBN benefit directly, because smaller files mean less bandwidth consumed per viewer, which matters during peak evening hours when household networks strain under simultaneous streaming demands.

Compatibility remains the catch. Hardware support has matured, but some older devices and free software players still struggle with HEVC, partly because of complex patent licensing arrangements. Australian editors exporting deliverables for a mixed audience sometimes still default to H.264 for the master file and reserve HEVC for archival or high-end streaming releases.

VP9: the open alternative built for the web

VP9 emerged from Google's push for a royalty-free codec that could handle web video without the licensing entanglements of HEVC. It powers most YouTube playback, especially for high-resolution and HDR streams, and pairs with the WebM container for open distribution. Australian YouTubers, podcasters and independent news outlets uploading through Google's infrastructure benefit from VP9's efficient encoding pipeline.

Quality for bitrate sits between H.264 and HEVC, which made VP9 a sensible compromise for years before AV1 arrived. It handles 4K, 8K and HDR, and supports features such as tile-based encoding that helps streaming services adapt streams to different devices. Browsers including Chrome, Firefox and Edge all decode VP9 natively, eliminating the need for plug-ins or extra codecs on the viewer's side.

Outside the browser, support is patchier. Some older smart TVs, set-top boxes and editing programs still cannot handle VP9 reliably, and many Australian broadcasters continue to standardise on H.264 for linear distribution. VP9 is therefore most useful for projects targeting web audiences rather than broadcast or physical media.

ProRes: the editing suite favourite

ProRes is Apple's family of intermediate codecs, designed for the high-pressure environment of professional post-production. Variants such as ProRes 422, ProRes HQ and ProRes 4444 preserve enough quality for grading, compositing and multi-layer effects while keeping file sizes manageable on fast storage. Australian post houses in Sydney and Melbourne routinely cut feature films, television dramas and commercials in ProRes.

The codec uses intra-frame compression, meaning each frame stands alone rather than relying on neighbouring frames. This makes timeline scrubbing, trimming and reversing clips lightning fast in editors such as Final Cut Pro, Premiere Pro and DaVinci Resolve. VFX artists rely on ProRes precisely because individual frames can be pulled and processed without long decoding routines.

ProRes files are large compared with delivery codecs, so they are not meant for the final master sent to viewers. They are working files, captured from cameras or rendered from edit timelines, then transcoded down to H.264, HEVC or a streaming-friendly format for distribution. This two-step approach keeps editing responsive and delivery efficient.

Choosing the right codec for your workflow

Picking a codec comes down to where the video will live, who will watch it and how much storage is available. A short social clip destined for Instagram Reels, TikTok and YouTube Shorts will travel well as H.264, since most platforms re-encode uploads anyway. A feature documentary headed to international streaming services is usually mastered in ProRes for editing and then delivered as HEVC or H.264 depending on platform requirements.

Creators managing huge archives on a single drive should weigh HEVC for its storage savings, while those prioritising the broadest playback compatibility will keep falling back on H.264. Web-first producers, including Australian educators publishing courses through online platforms, often find VP9 the most efficient path to YouTube and embedded players.

When footage arrives in a container that does not suit the next step in the pipeline, conversion becomes necessary. Converting MKV files for broader playback can rescue projects where the original codec is fine but the wrapper causes compatibility headaches. The trick is matching the codec, container and bitrate to the final destination rather than blindly re-encoding everything into a single format.

A practical habit is to keep a high-quality master, whether ProRes or a high-bitrate HEVC file, and export smaller delivery versions only when needed. That way, future re-releases for new platforms do not require going back to original camera files, and Australian creators retain control over their work for years to come.