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Christmas is coming! Father Christmas from some cold northern land will come down the chimney of the fireplace to put presents by the bed or to fill the stocking for everybody. Yes, it is a great festival for all the people all over the world.

In this great Day, Aunsoft Studio is providing great discount on Aunsoft Video and Audio programs, converters and rippers.

Generally, you will get 20% off for most of the single programs. But, you would get more pleasure if you like to focus on the special packages that Aunsoft Offers.

Aunsoft Package Gold & Platinum (Mac and Windows), are two flag packages for customers, providing great multimedia solutions to help you enjoy a happy Christmas holidays.

In the Package Gold, two great-magic products, Aunsoft Final Mate and Blu-ray Video Converter Ultimate are offered in $79.9, 30% off.

If you are a great HD Camcorder Fans, Aunsoft Final Mate is an ideal solution for you. It is an AVCHD MTS powerful converter, useful MTS editor and more than you expected. It will also help you Manage the camcorder footages in an easy and user-friendly way. In shorts, if you have a HD Camcorder, Aunsoft Final Mate will help you deal with the HD shootings greatly and happily. For iMac users, converting MTS to Prores 422 for FCP and AIC for iMovie is a great features that Aunsoft Final Mate provides!

Blu-ray Video Converter Ultiamte, called iMedia Converter on iMac, is an all-in-one converter program. It includes Video Converter, converting video and audio between various formats, DVD Ripper and Blu-ray Ripper, ripping Blu-rays and DVDs to various video and audio formats. You can get the HD output for your Tablets like iPad, XOOM, Playbook and Kindle Fire, etc. Full HD 1080P output is supported. It supports batch conversion. You can load more than 1 DVD or Blu-ray movies into the program at the same time and get them converted in one conversion task.
All of the Aunsoft programs will full-utilize your CPU cores in the conversion, so thatthe conversion speed will be 50% faster. It is a significant feature of Aunsoft programs.

In the Aunsoft Package Platinum, besides Final Mate and Ultimate Converter, TransMXF and MKV Converter are also integrated into the Package. TransMXF, a professional MXF Converter, is an enhanced support for MXF files shot by Panasonic P2 Card Camcorder. The MXF conversion by this program will avoid the video and audio sync problem in converting P2 Card Camcorder MXF files. For most of MKV files, they will be composed by several audio or subtitle tracks/streams. Aunsoft MKV Converter will allow you to choose any of them you like to convert, which means you can select the subtitle or audio you want in the MKV files and get them converted as you like. For most of other MKV Converters, you can not do that and the program will only pick up one of the streams at random.

So you will be able to enjoy all the technologies and solutions that Aunsoft Studio can offer in the Aunsoft Package Platinum. It will only cost $115.9 during the Christmas, from Dec 12 to the mid of January 2012, 35% off.

Aunsoft Studio also releases two discount packages for HD Camcorder fans, Aunsoft HD Camcorder Suite Gold & Platinum (Windows and Mac). In the Gold Suite, you will get Final Mate and TransMXF in the price $58.9, 30% off. In the Platinum, besides Final Mate and TransMXF, Aunsoft Video Converter is included, which will help you get MP4, AVI or MOV shot by camcorders converted. HD Camcorder Suite Platinum will be sold on $77.9, 35% off. All those discount prices will be only available from Dec 12 to the mid of January 2012.

Besides those four packages, you will get the bundles in the combination of Final Mate, TransMXF, Video Converter, Blu-ray Ripper, and DVD Ripper in various ways. During the discount time, DVD Ripper will be only $9.9 in all of the bundles that DVD Ripper is offered. For example, Video Converter is $35, but the package which includes Video Converter and DVD Ripper will only be $44.9 ($35+$9.9).

Do you have a Windows PC and an iMac, as well? Do you have to buy two different versions to run on different platform? No, Aunsoft Studio also provides many Cross-platform Bundles. For all the programs that Aunsoft Studio offers, you can get such a cross-platform bundles in 35% off. For example, the original price for Video Converter Windows and Mac is $70 totally; but you will only pay $45.9 to get them all!

For more details about all the discount package, please click HERE.

Extracting audio from video is an easy job for most such softwares. Actually this process is necessary for the video making. Lots of people purchase video-to-audio software when edting the movies or videos. And here I will recommend everyone a Totally Free one, which works pretty well: Aunsoft Video to Audio Converter.

This software has main functions to convert audio in the movies to any format you want, such as MP3, WAV, M4A, OGG, AC3, AU, AIFF, MP2, FLAC, and MKA. And meanwhile, you can directly Copy the whole video to keep the original quality.

This software is really easy-to-use. Just Import the videos into and then Select the correct audio format you want for exporting. The following picture will show you how to manage it.




Of course, for Mac users, Aunsoft Video to Audio Converter for Mac will do the same job.

TS

MPEG transport stream

From Wikipedia, the free encyclopedia

MPEG Transport Stream Filename extension         .ts

Internet media type        video/MP2T

Developed by           MPEG

Initial release           1995

Type of format         Media container

Container for Audio, video, data

Extended to    M2TS, TOD

Standard(s)     ISO/IEC 13818-1, ITU-T Recommendation H.222.0

MPEG transport stream (TS) is a standard format for transmission and storage of audio, video, and Program and System Information Protocol (PSIP) data, and is used in broadcast systems such as DVB and ATSC.

Transport Stream is specified in MPEG-2 Part 1, Systems (formally known as ISO/IEC standard 13818-1 or ITU-T Rec. H.222.0).

Transport stream specifies a container format encapsulating packetized elementary streams, with error correction and stream synchronization features for maintaining transmission integrity when the signal is degraded.

Transport streams differ from the similarly named Program Streams in several important ways: Program Streams, also called PS, are designed for reasonably reliable media, such as discs (like DVDs), while TS is designed for less reliable transmission, namely terrestrial or satellite broadcast. Further, a Transport Stream may carry multiple Programs.

Important elements of a transport stream

Packet

A packet is the basic unit of data in a transport stream. It consists of a sync byte, whose value is 0x47, followed by three one-bit flags and a 13-bit Packet Identifier (PID). This is followed by a 4-bit continuity counter. Additional optional transport fields, as signaled in the optional adaptation field, may follow. The rest of the packet consists of payload. Packets are 188 bytes in length, but the communication medium may add some error correction bytes to the packet. ISDB-T and DVB-T/C/S uses 204 bytes and ATSC 8-VSB, 208 bytes as the size of emission packets (transport stream packet + FEC data). ATSC transmission adds 20 bytes of Reed-Solomon forward error correction to create a packet that is 208 bytes long. The 188-byte packet size was originally chosen for compatibility with ATM systems.

PID

Each table or elementary stream in a transport stream is identified by a 13-bit packet ID (PID). A demultiplexer extracts elementary streams from the transport stream in part by looking for packets identified by the same PID. In most applications, Time-division multiplexing will be used to decide how often a particular PID appears in the transport stream.

Programs

Transport stream has a concept of programs. Each single program is described by a Program Map Table (PMT) which has a unique PID, and the elementary streams associated with that program have PIDs listed in the PMT. For instance, a transport stream used in digital television might contain three programs, to represent three television channels. Suppose each channel consists of one video stream, one or two audio streams, and any necessary metadata. A receiver wishing to decode a particular "channel" merely has to decode the payloads of each PID associated with its program. It can discard the contents of all other PIDs. A transport stream with more than one program is referred to as MPTS - Multi Program Transport Stream. A single program transport stream is referred to as SPTS.

Program Specific Information (PSI)

Main article: Program Specific Information

There are 4 PSI tables: Program Association (PAT), Program Map (PMT), Conditional Access (CAT), and Network Information (NIT). The MPEG-2 specification does not specify the format of the CAT and NIT.

PAT

PAT stands for Program Association Table. It lists all programs available in the transport stream. Each of the listed programs is identified by a 16-bit value called program_number. Each of the programs listed in PAT has an associated value of PID for its Program Map Table (PMT).

The value 0x0000 of program_number is reserved to specify the PID where to look for Network Information Table (NIT). If such a program is not present in PAT the default PID value (0x0010) shall be used for NIT.

TS Packets containing PAT information always have PID 0x0000.

PMT

Program Map Tables (PMTs) contain information about programs. For each program, there is one PMT. While the MPEG-2 standard permits more than one PMT section to be transmitted on a single PID, most MPEG-2 "users" such as ATSC and SCTE require each PMT to be transmitted on a separate PID that is not used for any other packets. The PMTs provide information on each program present in the transport stream, including the program_number, and list the elementary streams that comprise the described MPEG-2 program. There are also locations for optional descriptors that describe the entire MPEG-2 program, as well as an optional descriptor for each elementary stream. Each elementary stream is labeled with a stream_type value.

PCR

To enable a decoder to present synchronized content, such as audio tracks matching the associated video, at least once each 100 ms a Program Clock Reference, or PCR is transmitted in the adaptation field of an MPEG-2 transport stream packet. The PID with the PCR for an MPEG-2 program is identified by the pcr_pid value in the associated Program Map Table. The value of the PCR, when properly used, is employed to generate a system_timing_clock in the decoder. The STC decoder, when properly implemented, provides a highly accurate time base that is used to synchronize audio and video elementary streams. Timing in MPEG2 references this clock, for example the presentation time stamp (PTS) is intended to be relative to the PCR. The first 33 bits are based on a 90 kHz clock. The last 9 are based on a 27 MHz clock. The maximum jitter permitted for the PCR is +/- 500 ns.

Null packets

Some transmission schemes, such as those in ATSC and DVB, impose strict constant bitrate requirements on the transport stream. In order to ensure that the stream maintains a constant bitrate, a Multiplexer may need to insert some additional packets. The PID 0x1FFF is reserved for this purpose. The payload of null packets may not contain any data at all, and the receiver is expected to ignore its contents.