Customizing a Transcoding Template

In addition to the presets, you can customize one-in one-out transcoding templates based on your needs.

1. Log in to the MPC console.
2. In the navigation pane, choose Global Settings > Custom Templates.
3. Click Create Custom Template. In the displayed dialog box, specify related parameters.

   

4. Set basic information. See Table 1.

   Table 1 Basic information

   Parameter	Description
   Template Name	Enter a maximum of 128 characters. Only letters, underscores (_), and digits are allowed. Example: MP4_H264
   Output Format	Format of an output audio or video file. The following output formats are supported: Video formats: MP4, HLS, DASH+HLS, and DASH Audio formats: ADTS and MP3 Note: If you select Audio only, the video parameters are disabled and only audio is transcoded.

5. Set video parameters. See Table 2.

   If Audio only is selected, the output file does not contain any video information. This option applies to the scenario where audio is extracted from a media file. Perform step 7 to set audio parameters.

   Table 2 Basic video parameters

   Parameter	Description
   Video Codec	The H.264 and H.265 formats are supported.
   Low Bitrate HD (PVC)	Whether to enable low bitrate HD. The function is disabled by default. If this function is enabled, the output bitrate is about 20% lower than the configured bitrate.
   HLS Segment Duration	Length of an HLS segment. This parameter is only used when Output Format is set to HLS or DASH+HLS. The value ranges from 2 to 10. Default value: 5 Unit: s
   Dash Segment Duration	Length of a dash segment. This parameter is only used when Output Format is set to DASH or DASH+HLS. The value ranges from 2 to 10. Default value: 5 Unit: s
   Width (Unit: px)	Width of an output video. Its value range: If H.264 is selected for Video Codec, this value is 0 or a multiple of 2 from 32 to 4,096. If H.265 is selected for Video Codec, this value is 0 or a multiple of 2 from 160 to 4,096.
   Height (Unit: px)	Height of an output video. Its value range: If H.264 is selected for Video Codec, this value is 0 or a multiple of 2 from 32 to 2,880. If H.265 is selected for Video Codec, this value is 0 or a multiple of 2 from 96 to 2,880.
   Bitrate (Unit: kbit/s)	Bitrate of an output video. The value is 0 or ranges from 40 to 30,000. You are advised to set it to a recommended value. For details, see Table 3. If Bitrate is set to 0, the recommended bitrate is used.

   

   • If both the video width and height are set to 0, an output video is generated based on the resolution of the input video.
   • If the video bandwidth or height is set to 0, the corresponding value is scaled based on the original size.

   Table 3 Recommended resolutions and bitrates

   Video Quality	Recommended Resolution	Recommended Bitrate for H.265 (kbit/s)	Recommended Bitrate for H.264 (kbit/s)
   4K	3840x2160	5600	8000
   2K	2560x1440	4900	7000
   UHD	1920x1080	2100	3000
   HD	1280x720	700	1000
   SD	854x480	500	600
   LD	480x270	200	300

   

   If the bitrate is set to 0 and the configured resolution is not one of the recommended resolutions in the preceding table, use the recommended bitrate for the recommended resolution which is close to the configured resolution.

   For example, if the bitrate is set to 0 and the resolution is set to 900x500, the output bitrate is the recommended bitrate for the resolution 854x480, that is, 500 for H.265 and 600 for H.264.

6. Configure advanced video parameters. See Table 4.

   Table 4 Advanced video parameters

   Parameter	Description
   Maximum I-Frame Interval	Maximum interval between I frames (initial frame during playback). The value ranges from 2 to 5.
   Maximum Consecutive B-Frames	Maximum number of consecutive B-frames (intermediate frames during playback). Value range: 0 to 7 for H.264. The default value is 4. 0 to 7 for H.265. The default value is 7.
   Profile	Video encoding level, which is related to the video codec. It cannot be modified. If Video Codec is H.264, the default value is VIDEO_PROFILE_H264_HIGH. If Video Codec is H.265, the default value is VIDEO_PROFILE_H265_MAIN.
   FPS	Frame rate of an output video file. The value is 0 or ranges from 5 to 30. The value 0 indicates that the FPS of the output video is the same as that of the input video.
   Maximum Reference Frames	Number of past and future frames affected during decoding. Its value is: An integer ranging from 1 to 8 for H.264 Permanently 4 for H.265
   Quality	Quality level of video encoding. It cannot be modified. Possible values are: VIDEO_PRESET_HSPEED2 VIDEO_PRESET_HSPEED VIDEO_PRESET_NORMAL (default value)
   Black Bar Removal	Whether to automatically detect black bars and remove them. This function is disabled by default.

7. Set audio parameters by referring to Table 5.
   If Video only is selected, the output file does not contain any audio information. This option applies to the scenario where video is extracted from a media file.

   Table 5 Audio parameters

   Parameter	Description
   Audio Codec	Audio codec. Possible values include AAC and HEAAC1. The default value is AAC.
   Audio Channel	Possible values include Stereo, Mono, and 5.1 Channel. The default is Stereo.
   Sampling Rate	Choose one from Auto, 22050, 32000, 44100, 48000, and 96000. The default value is Auto. The unit is Hz. Auto indicates adaptive sampling.
   Bitrate	Bitrate of an output audio. The value is 0 or an integer ranging from 8 to 1,000. Unit: kbit/s

8. Click OK.