WebM
WebM (.webm) is a video file format developed by Google. WebM was originally designed to be used on webpages to save bandwidth, but it also has some benefits when it comes to video games and many other applications.
The biggest benefit of WebM over Bink (or AVI) for games is that of file size; a WebM video will be significantly smaller than that of a similar-quality Bink file. For example, the installation size of Hunt Down the Freeman decreased by 5.7 GB when switching its FMV cutscenes from Bink to WebM[1]. Furthermore, WebM is much more common and easier to make than the Bink file format, as Bink requires a tool that only takes AVI, then only to find out there's audio or video sync issues that may sometimes happen.
WebM is supported in the following games, engines, and engine branches:
Video codecs | Audio codecs | ||||
---|---|---|---|---|---|
Implementation | VP8 | VP9 | AV1 | Vorbis | Opus |
Source 2 ( tested) | Yes | Yes | No | Yes** | Yes** |
GoldSrc (since 25th anniversary update; intro video only) |
Yes | Yes | No | Yes* | No |
Counter-Strike: Global Offensive (since 2018 Panorama update) |
Yes | Yes | No | Yes*** | No |
Team Fortress 2 ( x64_test branch)
|
Yes | Yes | No | Yes | No |
Strata Source | Yes | Yes | No | Yes | No |
WebM Video Services for (used by Hunt Down the Freeman) |
Yes | Yes | No | Yes | Yes |
- *Audio is read, but muted.
<moddir>/sound/ui/valve_sound.wav
is used instead. - **Audio is read, but muted. (only in ) If the video was unable to play due to incompatible codecs or other codecs issue, then part of the intro sounds (
sounds/ui/logo_startup.vsnd_c
, which is played separately) will not play or likely be played in lower volume. - ***Sometimes audio plays in slower speed and lower pitch.
References
References | ||
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