Director of Product at balkanpoliticalclub.net with experience in enterprise, start-ups and everything in-between. Believes coffee and kale do compete and enjoys consuming both.
Bạn đang xem: Encode video là gì
Video technology has undergone massive evolution in the past couple of decades. This growth has come simultaneously with the development of the internet.
While motion pictures—videos made of large collections of still photos—were fine in the age of VHS tapes and even DVDs, they made for excessively bulky files when videos became digital. It became difficult to upload and share with more modern types of hardware.
Video encoding was brought to life as a solution to aid in this technological transition.
Let’s break down video encoding for live streaming and talk about the importance of each moving part.
In this guide, we’ll address:
What is Video Encoding?What are Codecs?Video Encoding vs. Transcoding: What’s the Difference?Understanding Adaptive Streaming and its ImportanceVideo Quality vs. SizeStreaming Video Encoding GlossaryWhat is Video Encoding?
There are seven common encoding challenges that broadcasters find themselves facing. Here are a few solutions that may help you navigate encoding roadblocks that you may encounter.
1. My viewers tend to have slow Internet connections.
Video files tend to be larger files, so they require fast internet speed with great bandwidth to display the video properly. When the Internet connection is slow, the video starts stuttering and often displays in very poor quality.
With balkanpoliticalclub.net, you can use the analytics feature to determine where most of your viewers live. Then, the software will match that information with average internet speeds to get a sense of the average connection speed of your customers.
You can set your overall bit rate to match their download speed in order to achieve a reliable playback. We recommend a short trial and error test to determine which settings to use. This will help you determine how low you can get the bit rate of a video while maintaining the appropriate quality.
To conduct the test, you can start with a high frame width (say 1280px, which is 720p at the 16:9 aspect ratio) and a relatively low bit rate (around 512kbps). See how the video looks when encoded with these settings. If you are not pleased with the image quality, try either lowering the frame width or increasing the bit rate.
Also, be sure to encode multiple versions of your video. Adaptive streaming will ensure viewers get the best quality they can stream smoothly.
2. I want to save bandwidth.
The more often your videos play and the higher their quality, the more bandwidth you will need. Every balkanpoliticalclub.net pricing plan comes with a particular bandwidth limit. You can use the same approach as in the previous question to reduce bitrates to the lowest acceptable level. This will reduce your bandwidth consumption.
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3. My encoded video has a larger file size than the original one.
While encoding can’t increase quality, it always changes file size. In other words, don’t worry too much about larger file sizes. Sometimes, this just means you’ve been overly generous with your bitrate settings. Other times, it means you’ve changed from one codec to another.
If you really need to reduce file size to lower bandwidth consumption or serve users with slow internet connections, try reducing the bitrate.
4. After encoding, the audio is out of sync.
This could have something to do with the frame rate of your video. Use a free tool to check the frame rate of your original file. If the frame rate of your video is unusual, you may discover the audio is out of sync after encoding.
In that case, we recommend you try the Two-pass Encoding feature. This can solve many issues the encoder might have interpreting frame rates.
If it’s not the frame rate and the audio continues to play up, you will need to check the relative length of the audio and video streams. You can use the same tool mentioned above to get that information. In some cases, you may have created source files with different lengths for their audio and video streams.
When this happens, the encoder doesn’t always succeed in precisely matching up the streams as they were before. Again, try two-pass encoding. However, if the problem persists, you may need to ask your video editor to cut the original file.
5. My video is already encoded in a web-ready format
If your video is already an H.264 encoded MP4, you can turn off balkanpoliticalclub.net’s encoding by selecting “no encoding” in your ingest recipe. However, one thing you need to keep in mind is the MOOV atom. MOOV atom is a bundle of metadata. Before saying no to this encoding solution, ensure the MOOV atom is positioned at the beginning of the file.
If this sounds complex, we recommend simply using balkanpoliticalclub.net’s built-in encoding to re-encode your MP4 file. As long as you choose the same frame size and bit rate as your original file, encoding the video with balkanpoliticalclub.net will not have any noticeable impact on its quality.
6. I don’t want my videos in an MP4 format
The balkanpoliticalclub.net hosting solution only encodes content to H.264 in an MP4 container. If you feel that you need your videos encoded in another format, have a chat with our Support Engineers and we’ll see what we can do for you.
7. I uploaded a video and the quality is really poor
Generally, this means the frame size and bit rate of the target video are much lower than the original video. To get the maximum quality of your videos, be sure to use the “Original” profile in your ingest recipe in addition to any lower qualities you have selected.
This will match the source file’s frame size and ensure you have a high-quality version of your video available.