avc1.4d0034 - Codec Support | WebCodecs Fundamentals ← Back to Codec Support Table

Codec: avc1.4d0034

98.73% Encoder Support
2,120,818 of 2,148,059 sessions supported encoding
99.81% Decoder Support
2,092,958 of 2,096,990 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Main
Level 5.2
Maximum Resolution 8K (8192×4352)
Maximum Bitrate 240 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 2,148,059 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.4% 862,044 / 867,272 99.77% 100,387 / 100,619 — 97.37% 631,994 / 649,050 96.73% 42,325 / 43,754
SafariSafari
 — 99.78% 48,117 / 48,223 99.98% 218,032 / 218,074 — —
EdgeEdge
 99.89% 143,820 / 143,985 100.0% 1,459 / 1,459 — 99.55% 4,198 / 4,217 98.84% 680 / 688
FirefoxFirefox
 95.83% 51,323 / 53,559 99.96% 7,481 / 7,484 — 0.0% 0 / 124 98.85% 6,011 / 6,081

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,096,990 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,583 / 844,777 99.81% 96,792 / 96,977 — 99.65% 636,789 / 639,029 98.4% 41,832 / 42,514
SafariSafari
 — 99.85% 46,809 / 46,878 99.98% 212,439 / 212,480 — —
EdgeEdge
 100.0% 140,006 / 140,013 100.0% 1,417 / 1,417 — 100.0% 4,140 / 4,140 98.97% 675 / 682
FirefoxFirefox
 99.96% 51,802 / 51,822 99.94% 7,236 / 7,240 — 0.0% 0 / 113 98.6% 5,762 / 5,844