H261 to AVI

H261 to AVI Converter, Convert H261 to AVI

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Convert H261 to AVI

H261 to AVI Software converts H261 to AVI quickly. Besides AVI, the converter could convert H261 to common video formats and portable devices, for example, OGV, AVI, VOB, 3GP, DivX, DV, MOV, WMV, iPhone, MPEG, and so on.

The converter is an all-in-one video converter that supports more than 100 video and audio file formats and converts to 40 popular formats. It could convert XVID to DivX, DRC to iPod, XVID to WMV, Y4M to 3G2, 3GPP to Xbox 360, DXA to MP4, WM to WMV, F4V to 3G2, and so on.

H261 to AVI Software supports batch conversion and is full compatible with 32-bit and 64-bit editions Vista and Windows 7.

H261 to AVI Software is compatible with Windows 10, 8, 7, Vista, XP, 2008, 2003, and 2000

What is H261?
H.261 is a 1990 ITU-T video coding standard, ratified in November 1988. Originally designed for transmission over ISDN lines on which data rates are multiples of 64 kbit/s. It is one member of the H.26x family of video coding standards in the domain of the ITU-T Video Coding Experts Group (VCEG). The coding algorithm was designed to be able to operate at video bit rates between 40 kbit/s and 2 Mbit/s. The standard supports two video frame sizes: CIF (352x288 luma with 176x144 chroma) and QCIF (176x144 with 88x72 chroma) using a 4:2:0 sampling scheme. It also has a backward-compatible trick for sending still picture graphics with 704x576 luma resolution and 352x288 chroma resolution (which was added in a later revision in 1993).

The H.261 standard actually only specifies how to decode the video. Encoder designers were left free to design their own encoding algorithms, as long as their output was constrained properly to allow it to be decoded by any decoder made according to the standard. Encoders are also left free to perform any pre-processing they want to their input video, and decoders are allowed to perform any post-processing they want to their decoded video prior to display. One effective post-processing technique that became a key element of the best H.261-based systems is called deblocking filtering. This reduces the appearance of block-shaped artifacts caused by the block-based motion compensation and spatial transform parts of the design. Indeed, blocking artifacts are probably a familiar phenomenon to almost everyone who has watched digital video. Deblocking filtering has since become an integral part of the most recent standard, H.264 (although even when using H.264, additional post-processing is still allowed and can enhance visual quality if performed well).

What is AVI?
Audio Video Interleave, known by its acronym AVI, is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows technology. AVI files can contain both audio and video data in a file container that allows synchronous audio-with-video playback. Like the DVD video format, AVI files support multiple streaming audio and video, although these features are seldom used. Most AVI files also use the file format extensions developed by the Matrox OpenDML group in February 1996. These files are supported by Microsoft, and are unofficially called "AVI 2.0".

There is slight overhead when used with popular MPEG-4 codecs (Xvid and DivX, for example), increasing file size more than necessary. The AVI container has no native support for modern MPEG-4 features like B-Frames. Hacks are sometimes used to enable modern MPEG-4 features and subtitles, however, this is the source of playback incompatibilities.

Step-by-Step Instructions to Converting H261 to AVI

Free Download H261 to AVI Software
Install the software by step-by-step instructions
Launch H261 to AVI Software
Choose H261 files

Add Files

H261

Open

Choose "to AVI"

[Optional] If you want to change AVI encoding parameters, for example, vodec codec, bit rate, frame rate, video size, and aspect ratio, please click "Options".