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Category Archives: Video Compression
When you watch a video online, rarely are you viewing the original footage. Online video, either streamed or downloaded, is encoded one of several video codecs as a way of reducing the file size and making transfer a faster, easier and less taxing process for hardware.
If you’re interested in live streaming or video production, knowing more about the most popular and widely used video encoding formats can help you deliver high-quality footage without the usual large file sizes or quality issues that can be a major problem online.
Below, we’ve listed the four most common online video formats, along with a brief description of each codec’s key advantages, disadvantages, and unique features.
Widely used online, MPEG-4 is one of the most common video formats available. MPEG-4 type encoding can be used to store both audio and video — most of the time, you’ll see it used as an option for video, with the file extension .mp4.
MP4 stands for “MPEG-4 Part 14.” As one of the oldest video containers out there, MPEG-4 has been widely used since the late 1990s. Because of its low file size, it’s a popular option for a video that needs to be downloaded before viewing, as well as online streaming video.
As well as its small file size, a key advantage of MPEG-4 is its compatibility. Almost every device and browser, from modern PCs and smartphones to aging hardware, will offer complete support for MP4 video.
AVI, or “audio video interleave,” is another old video file format. Developed in the early 1990s as a Windows video codec by Microsoft, AVI is one of the most widely viewed digital video options, with an almost defacto status for web video.
One interesting fact about AVI video is that it can be encoded using a variety of different video codecs. This means that while AVI itself is widely compatible, you might need to download an additional codec if you’re viewing an AVI video on an older computer.
Like MPEG-4, AVI is so widely used that it’s viewable on almost any device. Most short, lower resolution online videos are saved in the AVI format, although you’ll also find many short videos saved as MP4 files.
Another highly versatile video codec, H.264 has grown massively in popularity over the past few years as video content on the web has switched from lower resolutions to full HD and, in the last two to three years, to 4K.
A major advantage of H.264 is that it’s extremely versatile. Videos encoded using H.264 can be lossy and small in size, or almost completely lossless. It’s also far more efficient, from a file size perspective than older video codecs such as MPEG-4.
If you want to minimize your video’s file size while preserving as much detail as possible, H.264 is a great option. It’s also a widely supported codec, with full support on almost every operating system for PCs and mobile devices.
High-Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard, one of the several potential successors to the widely used AVC (H.264 or MPEG-4 Part 10). In comparison to AVC, HEVC offers double the data compression ratio at the same level of video quality or substantially improved video quality at the same bit rate. It supports resolutions up to 8192×4320, including 8K UHD.
In most ways, HEVC is an extension of the concepts in H.264/MPEG-4 AVC. Both work by comparing different parts of a frame of video to find areas that are redundant, both within a single frame as well as subsequent frames. These redundant areas are then replaced with a short description instead of the original pixels. The primary changes for HEVC include the expansion of the pattern comparison and difference-coding areas from 16×16 pixel to sizes up to 64×64, improved variable-block-size segmentation, improved “intra” prediction within the same picture, improved motion vector prediction and motion region merging, improved motion compensation filtering, and an additional filtering step called sample-adaptive offset filtering. Effective use of these improvements requires much more signal processing capability for compressing the video but has less impact on the amount of computation needed for decompression.
If you’re an Apple user, you’ll definitely recognize this file format. Introduced by Apple as part of QuickTime in the 1990s, MOV is a video format that’s widely used to compress video produced using Mac OS.
Apple has updated the MOV file format over the years, with the current QuickTime X offering a good mix of quality and compression. Because this format is designed by Apple for its range of devices and operating systems, it isn’t as widely used as AVI or MPEG-4.
Another reason for the lack of popularity of MOV files is their lack of compression. While most MOV files are of a reasonable file size, they still take up more space than equivalent video in AVI, MP4 or H.264 formats.
Learn more about digital video networking
From live video to IPTV and more, we specialize in helping businesses of all sizes use digital video to their advantage. To learn more, please contact our expert staff for personalized help and recommendations.
Wireless Video Formats and Compression
The best format for transporting video is in its native uncompressed state. Using this format prevents image distortions that arise from compression and eliminates the delays incurred by encoding and decoding the signal. There are a few wireless technologies that can support these bit rates; these can be easily deployed by broadcasters if the system setup rules are properly followed.
The vast majority of wireless transmission systems use compression to reduce the bit rate of standard definition and HD signals enough to fit within the channel capacities of the various wireless frequency bands. In a few cases, this compression is relatively light (meaning that a high bit rate channel is used), but in most cases heavy compression is required to reduce the bit rate so that it will fit within the available channel.
Compression technologies can be divided into two distinct categories: intra-frame and inter-frame. Intra-frame (also called I-frame-only) compression processes each image (frame) of a video sequence separately, with no dependence between adjacent frames. Inter-frame (or motion-compensation-based) compression can achieve higher amounts of compression (i.e. lower resulting bit rates) by only transmitting the differences between adjacent video frames.
MPEG4 AVC H.264 Video Encoders – $3.5K
VidOvation is offering the best deal in the industry with MPEG4 AVC H.264 video encoders starting at $3.5K per channel for SD. Reach us now for additional price breaks.
We are pioneers for IPTV, Video Networking, and Live Television Distribution on your own network. These MPEG4 AVC H.264 video encoders offer the industry’s highest channel density at highly competitive prices. Call us for re-seller and systems integrator pricing.
VidOvation specializes in MPEG AVC H.264 video encoders, offering both their VEN-2200 Stand-alone MPEG4 Encoders and their VEN-5200 openGear MPEG Encoders below.
Not only do we offer the best in MPEG AVC H.264 video encoders, but we also fully support the application needs of your video system. Whatever specific needs or issues you have, you can rely on us to help guide you in the decision making process and ensure the best result.
Additionally, VidOvation has the experience and the ability to guide you in the design and implementation of your video system. We suggest you go with us to avoid making costly mistakes and ensure the highest quality solution for your budget. Feel free to check out some of our many educational resources on the topic by clicking the link below.
VidOvation leads the way in providing turn-key solutions for IPTV, Live Television, and Video Distribution on your own network. Please see some of the new features below.Save time and hassle with auto video configuration. Synchronize the audio and video lip-sync inside the encoder with no external hardware. Save the cost of external scaling with basic built in scaling capability. New built in features streamline and help expedite technical support.Today we are featuring the VidOvation TV family of MPEG-4 AVC H.264 encoders which offer the industry’s highest channel density at prices starting at $3.5K per channel for SD. This is an industry first!
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- Auto-detection on input video with auto configuration and some scaling
- Additional audio encoding with two more MEPG-1 Layer II stereo and mono encoding
- Audio sync adjustment for up to 100 milliseconds of manual A/V synchronization
- SD resolutions and SD scaling to 640x480p29.97, 528x480p29.97, 640x576p25 and 528x576p25. Ideal for computer displays
- Support tab to send an e-mail to tech support with log and configuration files
In addition to providing leading technology, VidOvation can guide you through the design and implementation process of your Video system to help you avoid costly mistakes and deliver the highest quality solution for your budget.
The VidOvation TV encoder platform is unique in the industry supporting up to 10 channels of SD or HD per rack-unit and with resolutions up to 1080p60. The VidOvation TV encoder family is also one of the few encoders in its price range to offer both DVB-ASI and IP outputs standard and can be configured to provide SMPTE 2022 forward error correction.
If you want to learn more about VidOvation and how we can help with your video and data communications needs just call me at +1-949-777-5435. If you act now, receive additional discounts. Call now and save!
My team and I look forward to helping you.
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