tencent cloud

MPS converts audio/video files to different bitrates and resolutions for smooth playback on various devices with different bandwidth options. It has the following features:

Transcoding Audio/Video

Transcoding is an offline task that changes the codec, resolution, bitrate, etc., of an audio/video stream to suit different playback devices and network conditions. The benefits of transcoding include:

Benefit	Description
Increased compatibility	A source video can be transcoded to formats (e.g., MP4) compatible with more devices for smooth playback.
Increased bandwidth adaptability	A source video can be transcoded for playback at different clarity levels such as smooth, SD, HD, and FHD. End users can select the bitrate that best suits their network conditions.
Improved playback efficiency	The moov atom can be moved from the end of an MP4 file to the beginning, so that a video can be played before it is downloaded completely.
Reduced bandwidth consumption	The use of more advanced codec technology (e.g., H.265) makes it possible to reduce the bitrate of a video substantially while maintaining its quality, which helps reduce bandwidth consumption.

The parameters you can specify for transcoding include codec, resolution, bitrate, etc. For details, see the table below .

Category	Parameter	Description
Input formats	Container format	3GP, AVI, FLV, MP4, M3U8, MPG, ASF, WMV, MKV, MOV, TS, WebM, MXF
	Video codec	AV1, AVS2, H.264/AVC, H.263, H.263+, H.265, MPEG-1, MPEG-2, MPEG-4, MJPEG, VP8, VP9, RealVideo, Windows Media Video, QuickTime
	Audio codec	AAC, ADPCM, AMR, DSD, MP1, MP2, MP3, PCM, RealAudio, Windows Media Audio, Vorbis, AC-3
Output formats	Container format	Video: FLV, MP4, HLS (M3U8 + TS), MXF
		Audio: MP3, MP4, Ogg, FLAC, M4A
		Image: GIF, WebP
	Video codec	H.264/AVC, H.265/HEVC, AV1
	Delete audio streams	MP3, AAC, FLAC, MP2, Vorbis
Packaging	Delete video streams	If this is enabled, the transcoding result will contain only audio streams.
	Delete audio streams	If this is enabled, the transcoding result will contain only video streams.

Watermarking

Watermarking is an offline task that adds an image to transcoded video or screenshots at the specified location. MPS supports the following types of watermarks:

• Static watermarks: watermark in PNG format, which can be the logo of a copyright owner or TV station, and is usually used as a copyright claim
• Animated watermarks: animated watermarks in APNG format

You can add multiple watermarks of different sizes to different locations of a video or screenshot.

The parameters you can specify for watermarking include watermark type, aspect ratio, position, etc. For details, see the table below.

Parameter	Description
Type (Type)	Static or animated watermark
Position (Position)	Relative position of a watermark in video
Size (ImageSize)	Size of a watermark
Content (ImageContent)	Binary data of a watermark

Video Screenshot

Screenshot taking is an offline task that takes screenshots of a video at specified time. MPS supports the following types of screenshots:

• Time point screenshot: taking screenshots at specified time points
• Sampled screenshot: taking screenshots at regular intervals
• Sprite screenshot: taking screenshots at regular intervals and combining them into a single big image, which is known as a sprite

The parameters you can specify for screenshot taking include screenshot format, aspect ratio, etc. For details, see the table below.

Time point screenshot

Parameter	Description
Format (Format)	Format of screenshots (only JPG is supported currently)
Width (Width)	Screenshot width (px). Value range: 128-4096
Height (Height)	Screenshot height (px). Value range: 128-4096
Fill mode (FillType)	Fill mode specifies how source video images are processed when their aspect ratio does not match the specified aspect ratio of screenshots. The following fill modes are supported: Scale to fill: source video images are stretched to match the aspect ratio of screenshots. This may distort source images. Black bars: the aspect ratio of source video images is retained, and the empty spaces are painted black. White bars: the aspect ratio of source video images is retained, and the empty spaces are painted white. Gaussian blur: the aspect ratio of source video images is retained, and Gaussian blur is applied to the empty spaces.

Sampled screenshot

Parameter	Description
Format (Format)	Format of screenshots (only JPG is supported currently)
Width (Width)	Screenshot width (px). Value range: 128-4096
Height (Height)	Screenshot height (px). Value range: 128-4,096
Interval measurement (SampleType)	Sampling intervals can be measured in two ways: By percent: if intervals are measured by percent, and Interval is set to, for example, 5 (%), 20 screenshots will be generated for a video. By time: if intervals are measured by time, and Interval is set to, for example, 10 (sec), the number of screenshots generated will depend on the video length.
Interval (Interval)	Sampling interval. If interval measurement is by percent, this parameter is a percent value If interval measurement is by time, this parameter is a time value (sec).
Fill mode (FillType)	Fill mode specifies how source video images are processed when their aspect ratio does not match the specified aspect ratio of screenshots. The following fill modes are supported: Scale to fill: source video images are stretched to match the aspect ratio of screenshots. This may distort source images. Black bars: the aspect ratio of source video images is retained, and the empty spaces are painted black. White bars: the aspect ratio of source video images is retained, and the empty spaces are painted white. Gaussian blur: the aspect ratio of source video images is retained, and Gaussian blur is applied to the empty spaces.

Image sprite

Parameter	Description
Format (Format)	Format of image sprites (only JPG is supported currently)
Width (Width)	Width of the small images in a sprite
Height (Height)	Height of the small images in a sprite
Rows (Rows)	Number of image rows in a sprite
Columns (Columns)	Number of image columns in a sprite
Interval measurement (SampleType)	How sampling intervals are measured. Currently, only sampling by time is supported.
Interval (Interval)	Time interval for image sampling

Note：

• The result of Width x Columns (i.e., sprite width) should be within the range of 128-4096.
• The result of Height x Rows (i.e., sprite height) should be in the range of 128-4096.

Generating Animated Images

Animated image generation is an offline task that converts a video segment to an animated image (e.g., GIF or WebP). An animated image is a seamless cycle of continuous frames, whose size is smaller than a video segment.

The parameters you can set for animated image generation include format, width, height, frame rate, etc. For details, see the table below.

Parameter	Description
Format (Format)	Format of animated images (only GIF and WebP are supported currently)
Width (Width)	Animated image width (px). Value range: 128-4096
Height	Animated image height (px). Value range: 128-4096
Frame rate (FPS)	Value range (fps): 1-60