ConvertOnline

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1. Convert Online
2. Video Converters
3. M4V to FLV

{
  "convert": "m4v-flv",
  "multiple": true,
  "from": "m4v",
  "to": "flv",
  "controls": [
    {
      "type": "number",
      "optional": true,
      "name": "vframes",
      "label": "Number of Video Frames",
      "range": {
        "min": 1,
        "max": 100000
      },
      "desc": "Sets the exact number of video frames to output. Leave blank to convert the full video."
    },
    {
      "type": "dropdown",
      "name": "frame_rate",
      "label": "Frame Rate (FPS)",
      "options": [
        {
          "label": "15 fps",
          "value": 15
        },
        {
          "label": "24 fps (Film)",
          "value": 24
        },
        {
          "label": "25 fps (PAL)",
          "value": 25
        },
        {
          "label": "30 fps (NTSC)",
          "value": 30
        },
        {
          "label": "60 fps (High)",
          "value": 60
        }
      ],
      "defaultValue": 30,
      "desc": "Sets the output video frame rate. Lower rates reduce file size; higher rates improve motion smoothness."
    },
    {
      "type": "text",
      "optional": true,
      "name": "size",
      "label": "Frame Size",
      "placeholder": "e.g., 1280x720",
      "desc": "Sets the output resolution. You can use WxH format (e.g., 1920x1080) or common abbreviations like 720p, 1080p."
    },
    {
      "type": "dropdown",
      "name": "aspect",
      "label": "Aspect Ratio",
      "options": [
        {
          "label": "4:3",
          "value": "4:3"
        },
        {
          "label": "16:9",
          "value": "16:9"
        },
        {
          "label": "1.3333",
          "value": "1.3333"
        },
        {
          "label": "1.7777",
          "value": "1.7777"
        }
      ],
      "defaultValue": "16:9",
      "desc": "Sets the display aspect ratio of the output video."
    },
    {
      "type": "number",
      "optional": true,
      "name": "bits_per_raw_sample",
      "label": "Bits Per Raw Sample",
      "range": {
        "min": 8,
        "max": 16
      },
      "desc": "Sets the number of bits per raw sample (e.g., 8 for standard, 10 or higher for high bit-depth videos)."
    },
    {
      "type": "dropdown",
      "name": "vcodec",
      "label": "Video Codec",
      "options": [
        {
          "label": "FLV1 (Default for FLV)",
          "value": "flv1"
        },
        {
          "label": "H.264",
          "value": "libx264"
        },
        {
          "label": "Copy (No Re-encode)",
          "value": "copy"
        }
      ],
      "defaultValue": "flv1",
      "desc": "Selects the video codec to use. Use 'copy' to keep the original video stream without re-encoding."
    },
    {
      "type": "dropdown",
      "name": "pass",
      "label": "Encoding Pass",
      "options": [
        {
          "label": "1 Pass (Fast)",
          "value": 1
        },
        {
          "label": "2 Pass (Better Quality)",
          "value": 2
        }
      ],
      "defaultValue": 1,
      "desc": "Two-pass encoding provides better quality and bitrate control at the cost of longer processing time."
    },
    {
      "type": "number",
      "optional": true,
      "name": "video_bitrate",
      "label": "Video Bitrate (kbps)",
      "range": {
        "min": 100,
        "max": 50000
      },
      "desc": "Sets the target video bitrate in kbps. Higher bitrates improve quality but increase file size."
    },
    {
      "type": "number",
      "optional": true,
      "name": "audio_bitrate",
      "label": "Audio Bitrate (kbps)",
      "range": {
        "min": 32,
        "max": 320
      },
      "desc": "Sets the target audio bitrate in kbps. 128 kbps is standard for most videos."
    },
    {
      "type": "text",
      "optional": true,
      "name": "timecode",
      "label": "Initial Timecode",
      "placeholder": "00:00:00:00",
      "desc": "Sets the initial timecode value for the output video."
    }
  ],
  "note": "FLV is an older Flash-based video format commonly used for streaming. H.264 in FLV is widely supported, but FLV1 codec ensures maximum compatibility. Be mindful of bitrate and resolution if targeting older players.",
  "type": "video",
  "operation": "convert"
}