MTV Converter
AMV Converter
NSV Converter
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MTV, SMV, AMV, DMV, MVS, NSV, MPV, Encoder, Decoder, Player
On this website, you can find all the following mentioned items:
MP3 Players MP4 Players that support MTV format: Smaples MPIO MG100 supported video format MTV, (AVI, MPEG4, WMV, or Quick Time movie formats can be converted to the MTV format using the provided MPIO MTV Converter software)
ALi’s M5661 chip, Ali MTV Converter DENVER MPG-1012, MPG-2012 and MPG-4012 series, Denver MTV Converter
MTV, SMV, AMV, DMV, MVS, NSV Format Explanation: 1) MTV, MTV Converter MTV is file format supposedly created to allow video playback capabilities on inexpensive Chinese-made portable MP4 players without increasing the cost of those players with the license royalties (and more processor power). These Chinese MP4/MTV Player (sold as "MP4 Player" or "PMP", for Personal Media Player) are flash-based digital audio players, mostly manufactured in China and capable of displaying images, videos, and text files. Although commonly called MP4 players, are unable to play true MP4 (MPEG-4 AVC H.264) formated videos and are limited to proprietary formats such as MTV and AMV. MTV vs. [MPEG-2] (using typical values/approximations): Note! These MTV/AMV calculations are based on 30 minutes at 128 x 96 pixels, 12 frames/s, 22050 samples/s mono sound : 80 MB (approx) The audio is 22050 samples/s, mono, MP3(?) - a safe guess would be a maximum of 10 MB being audio, yielding 70 MB for video, or approximately 40,000 bytes per second.
The format operates by displaying a series of raw uncompressed rgb565/555 image frames while playing MP3 audio but as the files are of low resolution and frame rate, sizes are comparable to MPEG-1 or MPEG-2. (in a bytes-per-minute sense). Encoding and decoding are less processor-intensive than other contemporary formats, as in fact very little "encoding" is actually done. The MTV format consists of a 512 byte file header, followed by alternating audio and image blocks. Audio frame data is not necessarily aligned on block boundaries and each one of them has from 1 to n subblocks of 512 bytes each with 'n' remaining constant through the entire file/stream. The first 12 bytes of each audio subblock is padding data and is always set to 0. Image data, on the other hand, is perfectly contained in each image data block, each one representing an entire frame. During decoding of the video stream, the audio frames are passed to the MP3 hardware decoder, while the memory pointer of the display hardware is simply adjusted to the next raw image within the video stream. While this concept does not require additional * hardware for the decoding process, it leads to huge memory requirements as no compression is applied to the image frame data. Encoding and transcoding/conversion software utilities The software available in April 2006 allows screen sizes of 94x64, 128x96 and 128x128 pixels, typically set to frame rates of 8, 12 and 16 frames per second (described as "low","medium" and "high"), which fits reasonably well on 1.2 to 1.5+ inch screens. By editing configuration files the range of frame rates handled by the encoder can be expanded to 8-24 (in 1fps increments), though using alternate framerates may cause problems if the player is not designed for those.
2) AMV, AMV Converter AMV is a proprietary video file format, produced for MP4 players, as well as S1 MP3 players with video playback. There are now two different MTV formats: the older one for the Actions chip, and a newer one for ALi’s M5661 chip. This format for ALi one was ALIAVI. The container is a modified version of AVI. The video format is a variant of motion JPEG, with fixed rather than variable quantisation tables. The audio format is a variant of IMA ADPCM, where the first 8 bytes of each frame are origin (16 bits), index (16 bits) and number of encoded 16-bit samples (32 bits); all known AMV files run sound at 22050 samples/second. Low decoder overhead is paramount as the S1 MP3 players have very low-end processors (a Z80 variant). Video compression ratio is low — around 4 pixels/byte, compared with over 10 pixels/byte for MPEG-2 — though as the files are of low resolution (96×96 up to 208×176) and frame rate (10, 12, or 16 fps), file sizes are small in bytes per second. With a resolution of 128×96 pixels and a framerate of 12 fps, a 30-minute video will be compressed into 80 MB. The image compression algorithm of this format is inefficient by modern standards (about 4 pixels per byte, compared with over 10 pixels per byte for MPEG-2 / DVD video). There are a fixed range of resolutions (96 × 96 to 208 × 176 pixels) and frame-rates (12 or 16 frame/s) available. A 30-minute video would have a filesize of approximately 100 MB at a 160 × 120 resolution. Some small portable MP3 players also allow reproducing images and videos (maybe MP4 players, mp5 player), but they need the latter to be in some funny format called MTV, SMV (for devices with SigmaTel chipset. Other devices use different formats, such as AMV for devices with Actions chipset, MVS for those with Sunplus chipsets, NSV, DMV or ASF). 3) SMV, SMV Converter SMV stands for “SigmaTel Motion Video”, and was developed by SigmaTel Inc to allow users to transform common PC video files and watch them on their portable multimedia players (PMP). SMV files is quite a simple format composed of some headers, a WAV audio file and some JPEG frames: An SMV file has three sections, concatenated together: 1. An IMA ADPCM .wav file, with header. The SMV header is a magic string in ASCII ("SMV002000") followed by a number of 24-bit (3-byte) little-endian values representing the width, height, header length (in 3-byte words, starting with some magic “002″), some apparently constant value (1), the jpeg modulo, fps, number of frames. some apparently constant values (a 1 and a 0), the number of frames per jpeg, and 4 padding values (65793 == 0×010101). The default qualities seem to be 35kBps (”High”), 25kBps (”Medium”) and 16kBps (”Low”). Many people try to find MTV Converter, AMV Converter, NSV Converter, SMV Converter, etc. to convert videos to mtv, amv, nsv, smv, dmv formats. Now MTV Converter, AMV Converter and NSV Converter come for your convenience to convert various video files to MTV, AMV format easily. |
