1 |
Basic Parameters |
Encapsulation Format |
- Valid values for video files: hls, mp4, and flv.
- Valid value for audio files: mp3.
For more information about each encapsulation format, see Terms.
|
Definition |
- Valid values for video files: Low Definition, Standard Definition, High Definition,
Ultra High Definition, 2K, 4K, and Original.
Note
- For more information about the definition of narrowband HD 1.0 such as LD-Narrowband HD1.0 or SD-Narrowband HD1.0, see Narrowband HD TM 1.0.
- If you set Definition to Original, the original definition and bitrate of videos are retained. Only the container format
of videos is modified. This template group is suitable for scenarios in which you
do not need to adjust the size or bitrate of videos.
- Valid values for audio files: Standard Quality and High Quality.
|
2 |
Video Parameters |
Disable Video |
If you select Disable Video, the transcoded stream does not contain video information.
You can select Disable Video to extract audio in scenarios such as radio broadcasts.
|
Encoding Format |
Valid values: H.264 and H.265. |
Bitrate (Kbps) |
Valid values: 10 to 50000. The definition is based on the bitrate. We recommend that
you use the recommended bitrate in the following table for each definition.
|
Resolution |
Valid values: 128 to 4096, in pixels. You can specify the width or height of the video.
For example, if you specify the width of the video, the height is automatically calculated
based on the original aspect ratio of the video.
|
Frame Rate |
The number of frames displayed per second. We recommend that you use the recommended
value.
|
Maximum Keyframe Interval |
The number of frames in a group of pictures (GOP). We recommend that you use the recommended
value.
|
Watermark |
Specifies whether to add a watermark to a video. To add a watermark to a video, you
must add watermark materials in watermark settings and turn on Watermark. For more
information, see Manage watermarks.
|
3 |
Audio Parameters |
Disable Audio |
If you select Disable Audio, the transcoded stream does not contain audio information.
If you want to generate a video stream with no sound, select Disable Audio.
|
Encoding Format |
If you set Encapsulation Format to hls or mp4, you can set this parameter to AAC or
MP3. If you set Encapsulation Format to mp3, you can set this parameter only to MP3.
|
Sample Rate |
We recommend that you use the recommended value. |
Bitrate (Kbps) |
Valid values: 8 to 1000. We recommend that you use the recommended value. |
Audio Channels |
We recommend that you use the recommended value. |
4 |
Advanced Parameters. This section is displayed only if you set Encapsulation Format
to hls.
|
Fragment Length |
The duration of each TS segment. We recommend that you use the recommended value.
|
Video Encryption |
You can enable this feature to encrypt HLS videos. After you enable video encryption,
you must integrate an official player SDK that supports video decryption to play videos.
A free trial is provided for this feature.
Note The video encryption feature that you configure encrypts videos by using Alibaba Cloud
proprietary cryptography. For more information, see SubmitTranscodeJobs.
|
5 |
Conditional Transcoding Parameters |
Video Resolution Check |
Checks whether the resolution of the video file is lower than the resolution that
is specified in the transcoding template.
|
Video Bit Rate Check |
Checks whether the bitrate of the video file is lower than the bitrate that is specified
in the transcoding template.
|
Audio Bit Rate Check |
Checks whether the bitrate of the audio file is lower than the bitrate that is specified
in the transcoding template.
|