Convert to MKV

Matroska Video. The API converts 30 formats to MKV. These are the options, by input format.

curl https://api.switchfile.io/v1/convert \
  -H "Authorization: Bearer $SWITCHFILE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://example.com/input.3g2","to":"mkv","options":{"crf":23}}'

const res = await fetch("https://api.switchfile.io/v1/convert", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.SWITCHFILE_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"url":"https://example.com/input.3g2","to":"mkv","options":{"crf":23}}),
});
console.log(await res.json());

From 30 formats

3g2, 3gp, asf, avi, divx, dv, f4v, flv, ivf, m2ts, m2v, m4v, mkv, mod, mov, mp4, mpeg, mpg, mts, mxf, ogv, rm, rmvb, tod, ts, vob, webm, wmv, wtv, y4m

video_codecenumdefault: not set
Video codec. "copy" keeps the video as it is and fails if it does not fit the format.
one of copy, x264, x265, vp9, av1
crfintegerdefault: not set
Constant Rate Factor: lower values mean higher quality and larger files. 0 to 51 for H.264 and H.265, 0 to 63 for VP9 and AV1.
0 to 51
presetenumdefault: not set
Encoding speed against file size. Slower presets make smaller files.
one of ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow
tuneenumdefault: not set
Tune the encoder for the type of content (H.264 and H.265).
one of film, animation, grain, stillimage, fastdecode, zerolatency, psnr, ssim
profileenumdefault: not set
Compatibility profile (H.264: baseline to high444, H.265: main or main10).
one of baseline, main, high, high10, high422, high444, main10
levelenumdefault: not set
H.264 compatibility level.
one of 1, 1b, 1.1, 1.2, 1.3, 2.0, 2.1, 2.2, 3.0, 3.1, 3.2, 4.0, 4.1, 4.2, 5.0, 5.1, 5.2
widthintegerdefault: not set
Width of the video in pixels.
1 to 16384 px
heightintegerdefault: not set
Height of the video in pixels.
1 to 16384 px
fitenumdefault: max
"max" fits the video inside width and height without enlarging it, "crop" fills and crops, "pad" adds bars, "scale" stretches to the exact size.
one of max, crop, pad, scale
fpsnumberdefault: not set
Frame rate of the output.
0.1 to 240 fps
keyframe_intervalintegerdefault: not set
Largest number of frames between two keyframes.
aspect_ratiostringdefault: not set
Display aspect ratio, for example 16:9 or 4:3.
all_audio_streamsbooleandefault: true
Keep all audio tracks. Set to false to keep only the main audio track.
subtitles_modeenumdefault: copy
"copy" keeps the subtitle tracks of the input, "none" leaves them out.
one of none, copy
audio_codecenumdefault: not set
Audio codec. "copy" keeps the audio as it is, "none" removes it.
one of copy, none, aac, mp3, opus, vorbis, flac, pcm, alac
audio_bitrateintegerdefault: not set
Audio bitrate in kbit/s. Without a value the encoder picks a quality-based rate.
audio_qscaleintegerdefault: not set
Quality of variable bitrate MP3 from 0 (best) to 9. Ignored when audio_bitrate is set.
volumenumberdefault: not set
Change the volume: 1.0 keeps it, 1.1 is 10% louder, 0.5 is half as loud. At most 10.
channelsintegerdefault: not set
Number of audio channels, for example 1 for mono or 2 for stereo.
sample_rateintegerdefault: not set
Sample rate in Hz, for example 44100 or 48000 (8000 to 192000).
trim_startstringdefault: not set
Start of the part to keep, in seconds or HH:MM:SS.
trim_endstringdefault: not set
End of the part to keep, in seconds or HH:MM:SS.