Convert anything to WEBM

The API for converting any file to WEBM.

Here you can see all available conversion options which you can use within the "options" section of conversions (see the example JSON below the table).

Here you can see all available conversion options which you can use within the "options" section of conversions (see the example JSON on the right).

Option Name	Description
allow_multiple_outputs Type: boolean Default: False	If the conversion produces more than one output file, by default all of them are compressed in just one file. Set this option to true if you want a download link for each file.
allow_multiple_outputs_threshold Type: integer Minimum: 2 Maximum: 400	Sets the threshold for the number of output files during conversion. This option is considered only when `allow_multiple_outputs` is set to true. If the generated output files exceed this threshold, they are compressed into one file. Conversely, if the threshold is not met, each output file remains uncompressed.
aspect_ratio Type: string Pattern: ^\d{1,6}:\d{1,6}$	Specify the aspect ratio of the video e.g. 16:9.
audio_bitrate Type: integer Enum: 8 16 24 32 48 56 64 96 112 128 160 192 224 256 320	Audio bitrate in kbps.
audio_codec Type: string Enum: vorbis opus copy	Sets the audio codec
audio_frequency Type: integer Enum: 16000 22050 24000 32000 44100 48000	Audio frequency in Hz.
channel Type: string Enum: stereo mono	Audio channels.
codec Type: string Enum: av1 vp8 vp9 copy	Sets the video codec
crop_bottom Type: integer Minimum: False Maximum: 100000	Crop from the bottom. Use either the cropping from crop_top/bottom/left/right or crop_origin_x/y and crop_width/height.
crop_height Type: integer Minimum: True Maximum: 65000	Specifies the height in pixels of the crop area. Use either the cropping from crop_top/bottom/left/right or crop_origin_x/y and crop_width/height.
crop_left Type: integer Minimum: False Maximum: 100000	Crop from the left side. Use either the cropping from crop_top/bottom/left/right or crop_origin_x/y and crop_width/height.
crop_origin_x Type: integer Minimum: False Maximum: 65000	Specifies the X origin coordinate in pixels of the crop area starting from the upmost left corner of the image. Use either the cropping from crop_top/bottom/left/right or crop_origin_x/y and crop_width/height.
crop_origin_y Type: integer Minimum: False Maximum: 65000	Specifies the Y origin coordinate in pixels of the crop area starting from the upmost left corner of the image. Use either the cropping from crop_top/bottom/left/right or crop_origin_x/y and crop_width/height.
crop_right Type: integer Minimum: False Maximum: 100000	Crop from the right side. Use either the cropping from crop_top/bottom/left/right or crop_origin_x/y and crop_width/height.
crop_top Type: integer Minimum: False Maximum: 100000	Crop from the top. Use either the cropping from crop_top/bottom/left/right or crop_origin_x/y and crop_width/height.
crop_width Type: integer Minimum: True Maximum: 65000	Specifies the width in pixels of the crop area. Use either the cropping from crop_top/bottom/left/right or crop_origin_x/y and crop_width/height.
default_still_frame_duration Type: number Minimum: 0.02867 Maximum: 1800	Defines the duration in seconds of a still frame. E.g. when converting from images or documents.
deinterlace Type: boolean Default: False	Deinterlace the video
download_password Type: string Pattern: ^[ -~]{0,1000}$ Example: secret_password	A password to protect the download. To download the file send the password in the x-oc-download-password header or set a cookie named x-oc-download-password. The value contains a comma separated list of passwords.
end Type: string Pattern: ^\d\d:\d\d:\d\d$	Sets the end point of the part of the video you want to keep. The format is HH:MM:SS. HH = hour, MM = minutes, SS = seconds. Example 00:05:35
framerate Type: number Minimum: True Maximum: 120	Specifies the video frames per second
height Type: integer Minimum: True Maximum: 10000	Specifies the screen height in pixels
merge Type: boolean	Allows to merge the input files to a single video
mirror Type: string Enum: none horizontal vertical	Mirror/flip your video
normalize Type: boolean Default: False	Normalize the audio volume.
output_filename Type: string Pattern: ^[\w\W]{0,255}$ Example: my_base_filename_without_extension	The desired file name of the converted file WITHOUT the file extension.
overlays Type: array Additionalproperties: False Input_id: string ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$ 1 Define the input_id of the file you want to specify as an overlay. Valid files are videos and images Position_x: integer -100000 100000 The position of the overlay on the x-axis Position_y: integer -100000 100000 The position of the overlay on the y-axis Origin: string Top-left: Top-right: Bottom-left: Bottom-right: Center: Specify the origin for the positioning of the overlay. Default is top-left Width: integer 0 100000 The width of the overlay Height: integer 0 100000 The height of the overlay Opacity: string ^[0,1]$\|^0\.\d{1,2}$ Define the opacity of the overlay where 0 is invisible and 1 is full opacity
preset Type: string Pattern: ^[\w\W]{1,255}$	Predefined options
remove_audio Type: boolean Default: False	Disable the audio track
resize_by Type: string Enum: px perc	Sets the unit of measurement for the image's width and height
resize_handling Type: string Enum: stretch keep_aspect_ratio_fill_black keep_aspect_ratio_fill_white keep_aspect_ratio_fill_blurred keep_aspect_ratio_crop do_not_upscale Default: stretch	Determine how the resizing of the image should be done. Either by stretching, keeping the original aspect ratio (filling the empty space if needed) or not upscaling the original video.
rotate Type: integer Enum: 90 180 270	Rotate your video, specified in degrees clockwise
start Type: string Pattern: ^\d\d:\d\d:\d\d$	Sets the start point of the part of the video you want to keep. The format is HH:MM:SS. HH = hour, MM = minutes, SS = seconds. Example 00:02:23
video_bitrate Type: integer Minimum: True Maximum: 100000	Specifies the bitrate in kbps
width Type: integer Minimum: True Maximum: 10000	Specifies the screen width in pixels

Output Example

POST /v2/jobs HTTP/1.1
Host: https://api.api2convert.com
X-Oc-Api-Key: <your API key here>
Content-Type: application/json
{
    "input": [{
        "type": "remote",
        "source": "https://example-files.online-convert.com/video/mp4/example_small.mp4"
    }],
    "conversion": [{
        "category": "video",
        "target": "webm",
        "options": {
            <conversion options here>
        }
    }]
}