ROQ to M4A
Convert ROQ to M4A, ROQ to M4A Converter
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ROQ to M4A Software converts ROQ files to M4A. The software is an ALL-IN-ONE audio converter that supports more than 110 audio and video files.
ROQ to M4A Software supports batch conversion and is full compatible with Windows 10/8/7/Vista/XP/2000.
Right-click converted item and choose "Play Destination" to play the destination file, choose "Browse Destination Folder" to open Windows Explorer to browse the destination 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 M4A?
Because of its exceptional performance and quality, Advanced Audio Coding (AAC) is at the core of the MPEG-4, 3GPP and 3GPP2 specifications and is the audio codec of choice for Internet, wireless and digital broadcast arenas. AAC provides audio encoding that compresses much more efficiently than older formats, such as MP3, yet delivers quality rivaling that of uncompressed CD audio.
Convert ROQ to M4A Related Topics: DV to M4A, DVR-MS to M4A, DXA to M4A, GSM to M4A, GXF to M4A, H263 to M4A, H264 to M4A, HDTV to M4A, KAR to M4A, MKA to M4A, MLP to M4A, MP1 to M4A, MPE to M4A, MPG to M4A, NUV to M4A, OGM to M4A, OGV to M4A, OGX to M4A, OMA to M4A, PSX to M4A, PVA to M4A, QCP to M4A, QT to M4A, ROQ to M4A, ULAW to M4A, VCD to M4A, VFW to M4A, VID to M4A, VMD to M4A, VQF to M4A, W64 to M4A, WAVE64 to M4A, IT to M4A, M4A to WAV, M4B to M4A, MO3 to M4A, MOD to M4A, MP3 to M4A, UMX to M4A, WAV to M4A, WMA to M4A, WMV to M4A, WV to M4A
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