Once you map a video to content, then the encoding process automatically starts in the server. During the encoding process, we convert the original video formats (i.e. if the original video formats are mov, flv, vob, m4v, mkv, avi, 3gp & mpg) to .mp4 (video codec - H264) format using FFMPEG. As .mp4 video format is supported by multiple platforms (i,e, Android, iOS, Web, etc.). So your end-users can play the encoded video on multiple platforms and devices. We also store the videos in different resolutions on the server after encoding.
Note: We recommend uploading .mp4 videos to your Video Library to make the encoding process faster.
Once the video is encoded, it is stored in the server from the lowest resolution to the original resolution. For example, if you upload a video with 1080p resolution, then after encoding the videos are stored in the lowest to the original video resolution i.e. in this case from 144p to 1080p. So the best resolution for the video in this scenario is 1080p. When the video is played in the player and the end-users click on the gear icon to select the resolution, they can view the highest or the original resolution of the video named "Best" (see below screenshot).
|Original Video Resolution||Encoded Video Resolution||Video Size (Video Duration 1 Hour)|
|2160||2160 (Best), 1440, 1080, 720, 480||7910 MB|
|1440||1440 (Best), 1080, 720, 480||4394 MB|
|1080||1080 (Best), 720, 480, 360||2636 MB|
|720||720 (Best), 480, 240, 144||1318 MB|
|480||480 (Best), 360, 240, 144||690 MB|
|360||360 (Best), 240, 144||439 MB|
|240||240 (Best), 144||263 MB|
|144||144 (Best), 144||175 MB|
Bitrate can describe the quality of an audio or video file. The quality of a video or audio file is measured by the bitrate just like the quality of an image is measured in resolution. During the encoding process, the video file gets compressed but it doesn't affect the bitrate/quality of the video. For example, when a 1 GB of 4K video file is encoded, the size of the file after encoding is 700 MB. But the bitrate remains the same. The below table shows the bitrate for different video resolutions after encoding.
|Video Dimension||Video Resolution||Video's Frame Rate/ Second||H264/AVC1 Compatible||Audio
|Avg Video Bitrate||Avg. Size for 1 GB Original Video|
|3840x2160||4K||29.97 fps||Yes||128 kb/s||*8500 kb/s||700MB|
|2560x1440||QHD||29.97 fps||Yes||128 kb/s||3854 kb/s||500MB|
|1920x1080||1080p||29.97 fps||Yes||128 kb/s||2236 kb/s||400MB|
|1280x720||720p||29.97 fps||Yes||128 kb/s||1000 kb/s||300MB|
|554x480||480p||29.97 fps||Yes||128 kb/s||543 kb/s||210MB|
|640x360||360p||29.97 fps||Yes||128 kb/s||400 kb/s||170MB|
|426x240||240p||29.97 fps||Yes||128 kb/s||329 kb/s||140MB|
|144x144||144p||29.97 fps||Yes||128 kb/s||270 kb/s||100MB|
|*Note: Regarding the Video bitrate, we use FFmpeg's CRF value 23, which best compress the video without losing quality|
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