ConvertOnline

Image

Audio

Video

Document

Color

1. Convert Online
2. Video Converters
3. FLV to MKV

{
  "convert": "flv-mkv",
  "multiple": true,
  "from": "flv",
  "to": "mkv",
  "controls": [
    {
      "type": "text",
      "name": "vframes",
      "label": "Limit Video Frames",
      "optional": true,
      "desc": "Limits the number of video frames in the output. For example, setting this to 100 will output only the first 100 frames."
    },
    {
      "type": "dropdown",
      "name": "framerate",
      "label": "Frame Rate (fps)",
      "options": [
        {
          "label": "15 fps",
          "value": 15
        },
        {
          "label": "24 fps (Film)",
          "value": 24
        },
        {
          "label": "30 fps (Standard)",
          "value": 30
        },
        {
          "label": "60 fps (Smooth)",
          "value": 60
        }
      ],
      "defaultValue": 30,
      "desc": "Sets the output frame rate. Higher frame rates result in smoother video but larger files."
    },
    {
      "type": "text",
      "name": "resolution",
      "label": "Resolution (Width x Height)",
      "placeholder": "e.g. 1280x720",
      "optional": true,
      "desc": "Sets the video resolution (e.g., 1920x1080 for Full HD). Leave blank to keep original resolution."
    },
    {
      "type": "dropdown",
      "name": "aspect",
      "label": "Aspect Ratio",
      "options": [
        {
          "label": "Auto (Original)",
          "value": ""
        },
        {
          "label": "4:3 (Standard)",
          "value": "4:3"
        },
        {
          "label": "16:9 (Widescreen)",
          "value": "16:9"
        }
      ],
      "defaultValue": "",
      "desc": "Sets the display aspect ratio for the output video. Leave as 'Auto' to retain the source ratio."
    },
    {
      "type": "dropdown",
      "name": "video_bitrate",
      "label": "Video Bitrate",
      "options": [
        {
          "label": "512 kbps (Low)",
          "value": "512k"
        },
        {
          "label": "1000 kbps (Standard)",
          "value": "1000k"
        },
        {
          "label": "2000 kbps (HD)",
          "value": "2000k"
        },
        {
          "label": "4000 kbps (Full HD)",
          "value": "4000k"
        }
      ],
      "defaultValue": "2000k",
      "desc": "Specifies the target bitrate for video encoding. Higher bitrates increase quality and file size."
    },
    {
      "type": "dropdown",
      "name": "video_codec",
      "label": "Video Codec",
      "options": [
        {
          "label": "Default (libx264)",
          "value": "libx264"
        },
        {
          "label": "Copy Original (no re-encode)",
          "value": "copy"
        },
        {
          "label": "VP9 (libvpx-vp9)",
          "value": "libvpx-vp9"
        }
      ],
      "defaultValue": "libx264",
      "desc": "Selects the video codec used for encoding. Choose 'copy' to skip re-encoding and preserve the original stream."
    },
    {
      "type": "text",
      "name": "timecode",
      "label": "Timecode (hh:mm:ss:ff)",
      "optional": true,
      "desc": "Sets a starting timecode for the video (e.g., 00:00:00:00). Useful for broadcast or syncing."
    },
    {
      "type": "dropdown",
      "name": "pass",
      "label": "Encoding Pass",
      "options": [
        {
          "label": "1-Pass (Fast)",
          "value": 1
        },
        {
          "label": "2-Pass (Balanced)",
          "value": 2
        },
        {
          "label": "3-Pass (High Quality)",
          "value": 3
        }
      ],
      "defaultValue": 1,
      "desc": "Sets the number of encoding passes. Multi-pass encoding improves quality and compression at the cost of speed."
    },
    {
      "type": "text",
      "name": "video_filters",
      "label": "Custom Video Filters",
      "optional": true,
      "placeholder": "e.g. scale=1280:720,fps=30",
      "desc": "Apply FFmpeg video filters (e.g., resize, crop, grayscale). Use advanced syntax like `scale=1280:720,fps=30`."
    }
  ],
  "note": "FLV is an older streaming format, while MKV is a modern container that supports high-quality video, audio, and subtitles. The conversion may increase file size depending on selected bitrate and resolution. Use the 'copy' codec to avoid re-encoding if you want to preserve the original stream.",
  "type": "video",
  "operation": "convert"
}