multimedia_state_of_the_art.md

Introduction

This table shows the current implementation status of several multimedia fomats by popular tools and browsers. All tests were run with the latest available version, or git HEAD for open source software.

Symbols mean

• ✅ fully supported
• ❗ unsupported
• 💭 work in progress
• 1️⃣️ see notes

Codecs

	ffmpeg	VLC	l-smash	Firefox	Chrome	Edge	Safari
WebP	✅	n/a	n/a	💭 1️⃣️	✅	❗	😂
VP9 (webM)	✅	✅	n/a	✅	✅	✅	😂
Opus (webM)	✅	✅	n/a	✅	✅	✅	😂
VP9 (MP4)	✅3️⃣️	✅	❗	✅2️⃣️	💭 4️⃣️	❗	😂
Opus (MP4)	❗5️⃣️	✅	❗9️⃣️	✅6️⃣️	❗7️⃣️	❗	😂
FLAC (MP4)	❗	❗	❗	💭*️⃣	❗	❗	😂
VP9 10 bit	✅	✅	❗	❗8️⃣️	💭 🔟	❗	😂
H.264 10 bit	✅	✅	✅	❗8️⃣️	✅	❗	❗
HEVC 8/10 bit	✅	✅	✅	❗	❗	✅	❗

• 1️⃣️ Firefox bug
• 2️⃣️ Supported in ff52, there might be some implementation problems (Firefox bug)
• 3️⃣️ Decoding works, encoding requires -strict experimental
• 4️⃣️ Needs a command line switch --enable-vp9-in-mp4, work is being done to enable it by default (Chrome bug)
• 5️⃣️ Needs this patch upstreamed, but there are some implementation problems
• 6️⃣️ Fragmented MP4 is supported from ff49, full support in ff52
• 7️⃣️ Chrome bug
• 8️⃣️ Firefox bug
• 9️⃣️ Patch is available, waiting on spec finalization
• 🔟 Chrome bug
• *️⃣ Firefox bug

Color spaces

	ffmpeg	VLC	Firefox	Chrome	Edge	Safari
BT.709	✅	✅	✅	✅	✅	✅
DCI P3	❗	✅	❗	❗	❗	✅
BT.2020	✅	✅	❗2️⃣️	❗	❗	✅
BT.2100	❗	❗	❗	❗	❗	❗

• Original bt709 Firefox bug
• Original bt709 Chrome bug
• 2️⃣️ Firefox bug

Further resources

• Edge features breakdown
• Opus in MP4 spec
• Firefox intent to support Opus in MP4
• Chrome bug for BT.709 support

[9] is poorly-worded

Maybe add VP8/VP9 alpha feature?
Supported by Chrome, Firefox bug.

I can't get VLC to play the 10-bit VP9 clips from the VP9 testsuite (e.g. street1_1_2048X1088_fr60_bd10_sub8x8_sf_l41.webm). However, Chrome now can.