Quali sono i codec migliori?
AV1 is widely recognized in 2025 as the mainstream, royalty-free video codec offering superior compression and efficiency for internet video transmission, streaming, and storage. It is supported by all major browsers, many new smart TVs, and the latest hardware from Apple and Android, with YouTube, Netflix, and major platforms now frequently using AV1 for 4K and mobile video to reduce bandwidth costs and storage without sacrificing quality [1] [2] [5] [10].
AV1’s key advantages in 2025:
- Superior Compression: AV1 offers 20–50% better compression than H.264/HEVC, enabling smaller file sizes and lower bandwidth requirements for equivalent quality, especially at higher resolutions [1] [2] [4] [5] [10].
- Royalty-Free and Open Source: Developed by the Alliance for Open Media (AOMedia), AV1 is completely royalty-free, avoiding the licensing fees and legal complexities associated with HEVC (H.265) and making it attractive for open-source and commercial projects [1] [2] [3] [8].
- Broad Adoption: The codec is now mainstream—fully supported in Chrome, Firefox, Edge, and natively baked into Android 14 and new Apple M-series hardware, with growing (but not yet universal) hardware decode availability in TVs and mobile devices [2] [4] [5].
- Streaming and Storage Optimization: Large platforms like YouTube and Netflix report up to 50% storage/bandwidth savings versus H.264 for their 4K content. AV1 is replacing older codecs in many 4K/UHD delivery pipelines [2] [4] [5] [10].
- Advanced Features: AV1 supports 4K/8K, HDR (HDR10+, Dolby Vision), wide color gamuts, high frame rates, and is optimized for adaptive bitrate streaming [1] [5].
Current limitations:
- Hardware Decoding Gaps: Hardware decode is available in most new high-end phones (iPhone 15/16, latest Android flagships, recent M-series Macs) and TVs, but legacy and mid-range devices may lack efficient hardware support. In these, playback can fall back to less efficient software decoding [2] [4] [5].
- Encoding Speed: Compared to H.264/H.265, AV1 encoding is significantly more compute-intensive; real-time or live encoding often requires substantial hardware or specialized accelerators [1] [4] [5].
- Transition Period: Platforms still maintain multi-codec pipelines (offering H.264/H.265 alongside AV1) for backward compatibility—H.264 remains crucial for older devices [2] [4] [5].
AV1 ecosystem in 2025:
- Software support: Mature, with widespread AV1 encoding tools (aomenc, SVT-AV1, rav1e; integration in ffmpeg, HandBrake, cloud services like AWS, Bitmovin, Telestream Cloud) [1] [5].
- Real-world usage: Major services (YouTube, Netflix, Facebook Watch, Messenger, Instagram, WhatsApp) have transitioned much of their new video content to AV1 [2] [5].
- Industry trends: Mozilla defaults to AV1 for all WebRTC calls, and at least half of new smart TVs support native AV1 decoding [5].
- Image format: AVIF, a format for still images using AV1 compression, sees increasing web and app support [3].
In summary, as of 2025, AV1 is the preferred codec for new video delivery projects targeting modern devices and 4K+ content, striking the best balance of efficiency, quality, and licensing freedom. However, full universal adoption is still progressing as hardware support matures and legacy devices phase out [2] [5] [4].