60p-30p slow motion?

Transloadit
1

Hi there, newbie here. Is there a way to upload 60P and get back 30P at 50% speed slow mo?

2

Hello, so by using our /video/encode Robot’s ffmpeg parameter, you can alter both audio and video streams’ playback speed. To change your files video stream, you need to use the "setpts" (presentation timestamp) filter and for the audio stream using the "atempo" flag.

This method uses both audio and video stream manipulation to set your preset value to “empty” to avoid a clashing error.

The below template step will convert your input file to 50% playback speed.

"manipulate_playback_speed": {
      "use": ":original",
      "robot": "/video/encode",
      "result": true,
      "preset": "empty",
      "ffmpeg_stack": "v3.3.3",
      "rotate": false,
      "ffmpeg": {
        "filter_complex": "[0:v]setpts=2.0*PTS[v];[0:a]atempo=0.5[a]",
        "map": [
          "[v]",
          "[a]"
        ]
      }
    }