ROQ to AMR
Convert ROQ to AMR, ROQ to AMR Converter
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Total Audio MP3 Converter converts ROQ files to AMR format. The software is an all in one audio converter that supports more than 90 audio and video files as input, and converts to popular formats such as MP3, WAV, AAC, M4A, OGG, WMA, and AMR.
Total Audio MP3 Converter also supports batch conversion, and is full compatible with Vista and Windows 7.
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 AMR?
Convert ROQ to AMR Related Topics: AMR to AAC, XVID to AMR, DAT to AMR, VOC to AMR, M4V to AMR, DXA to AMR, IT to AMR, AMR to M4B, WV to AMR, PSX to AMR, VQF to AMR, HDTV to AMR, MPA to AMR, ULAW to AMR, FLAC to AMR, XA to AMR, WM to AMR, GXF to AMR, M4B to AMR, 3GPP to AMR, MJ2 to AMR, 4XM to AMR, SND to AMR, MPC to AMR, SWF to AMR, W64 to AMR, 3G2 to AMR, QT to AMR, MTM to AMR, MPGA to AMR, F4B to AMR, QCP to AMR, OGX to AMR, MPE to AMR, DTS to AMR, OGV to AMR, WAV to AMR, SOL to AMR, MOD to AMR, SMK to AMR
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