Formats/RoQ
The RoQ video format is a legacy format inherited from legacy id Tech engines.
Note
The RoQ format will be available starting with Dæmon 0.55.
Usage
The only usage of RoQ videos in the Dæmon engine is to be used on in-game surfaces using the videoMap material keyword.
In practice any resolution is supported, as long as the dimensions are divisible by 16. The sound channel will be ignored.
Here is a command to convert a given video.webm into a video.roq:
ffmpeg -i video.webm -an -vf scale="256:256" -r 30 video.roq
History
The Multimedia Wiki says:
RoQ is a full motion video format originally developed for The 11th Hour by Graeme Devine. The format was later used as the FMV format for Quake III: Arena and derivative games. According to excerpts of Devine's 11th Hour development journal published in Wired at http://www.wired.com/wired/archive/3.08/shipping.html, the RoQ format was named after Devine's newborn daughter, Roqee.
The Edge wiki also says:
RoQ is a video file format that originated in The 11th Hour game. After Graeme Devine, the creator of the format joined id Software, the RoQ file format has been in use in every game the company has released such as Quake III, Return to Castle Wolfenstein and DOOM 3.
Format
The format only supports 30 frames per second framerate. There is a space designated for FPS in the file header, but it is ignored by the reference implementation.
About video resolution in predecessor engines, the Edge wiki says:
Videos may technically be up to 65520 x 65520 pixels with both dimensions divisible by 16 and produce a valid RoQ file, but none of id Software’s games will play back a video with dimensions that aren’t a power of two, most likely because of OpenGL’s texture sizing restrictions.
The OpenArena wiki says that Quake Ⅲ was able to use video resolutions up to 512×512 for cinematic and that video resolution should not be greater than 256×256 to be played as an in-game surface with the videoMap material keyword. The Dæmon engine doesn't support cinematic but supports the videoMap material keyword.
The RoQ format supports mono, stereo, with 22050 Hz being the only rate supported, or the absence of any audio channel. We have no usage for RoQ sound in the Dæmon engine.
The ffmpeg video codec is roqvideo and the audio codec is roq_dpcm.
