ROQ to OGG
Convert ROQ to OGG, ROQ to OGG Converter
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OGG Video Converter converts ROQ files to OGG format easily and quickly. The software is an ALL-IN-ONE audio converter that supports more than 100 audio and video files.
OGG Video Converter supports batch conversion, and is full compatible with 32-bit and 64-bit Vista and Windows 7.
Click "Add Files" to choose ROQ files and add to conversion list.
Choose one or more ROQ files you want to convert and then click "Open". OGG Video Converter will open the files and get information such as width, height, frame rate, video bit rate, audio sample rate, audio bit rate, audio channels, and then list the information at conversion list.
Click "Convert" to convert ROQ files to OGG format.
The software is converting ROQ files to OGG format.
Right-click converted WMA file and choose "Play Destination" to play the outputted WMA file; choose "Browse Destination Folder" to open Windows Explorer to browse the WMA file.
What is ROQ?
The format runs at a fixed 30 frames per second with an optional 22050 Hz mono or stereo sound track. 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.
NOTE: It's been reported that movies with dimensions greater than 512 x 512 cause issues in various id Software games. Until this can be positively confirmed or denied it's best to avoid higher resolutions.
RoQ is a motion compensating vector quanitizer format, similar to Cinepak, but higher quality due to the use of the ITU-R BT.601 colorspace (the same one used in component video, PAL televisions, JPEG and MPEG), whereas Cinepak uses a low-quality YUV-like colorspace designed for faster decoding that often results in gamut degradation before compression even begins.
Because it's a vector quantizer, RoQ files are very fast to decode and very slow to encode. Decoding involves nothing more than converting the colorspace of the codebooks and then copying data, whereas encoding involves using several complicated schemes to produce a "palette" of image fragments that will result in the least degradation.
RoQ uses two codebooks per frame, with the second being constructed from pieces of the first, with up to 256 entries each. Due to this, only 1024 new colors can be introduced each frame, severely limiting the color gamut. This could arguably be improved by better predicting which sections will be motion compensated, but doing so is difficult, since codebook entries are generated from non-motion-compensated image sections, but whether or not they'll be used depends on the quality of them compared to motion compensated sections, resulting in a chicken-and-egg problem. This is made worse by the fact that all three major RoQ codecs are single-pass.
While the format is limited and much lower quality than MPEG and Indeo Video, it was presumedly preferred by id Software because of the lack of royalties, the lack of patent liability that presents a serious problem with most video formats, and the absence of complex platform-specific APIs.
What is OGG?
The name "Ogg" refers to the file format which can multiplex a number of separate independent free and open source codecs for audio, video, text (such as subtitles), and metadata.
In the Ogg multimedia framework, Theora provides a lossy video layer, while the music-oriented Vorbis codec most commonly acts as the audio layer. The human speech compression codec Speex, lossless audio compression codec FLAC, and OggPCM may also act as audio layers.
The term "Ogg" is commonly used to refer to audio file format Ogg Vorbis, that is, Vorbis-encoded audio in the Ogg container. Previously, the .ogg file extension was used for any content distributed within Ogg, but as of 2007, the Xiph.Org Foundation requests that .ogg be used only for Vorbis due to backward compatibility concerns. The Xiph.Org Foundation decided to create a new set of file extensions and media types to describe different types of content such as .oga for audio only files, .ogv for video with or without sound (including Theora), and .ogx for applications.
Because the format is free, and its reference implementation is non-copylefted, Ogg's various codecs have been incorporated into a number of different free and proprietary media players, both commercial and non-commercial, as well as portable media players and GPS receivers from different manufacturers.
Convert ROQ to OGG Related Topics: M2A to OGG, GSM to OGG, XVID to OGG, HDTV to OGG, VQF to OGG, F4V to OGG, 3GP2 to OGG, ROQ to OGG, M1A to OGG, MKV to OGG, DNXHD to OGG, STR to OGG, THD to OGG, VCD to OGG, H264 to OGG, MJ2 to OGG, MTV to OGG, SWF to OGG, AVI to OGG, FLIC to OGG, H261 to OGG, OGA to OGG, DIF to OGG, OMA to OGG, DV to OGG, 3G2 to OGG, M1V to OGG, ALAW to OGG, TS to OGG, SMK to OGG
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