Video Edit SDK FFmpeg .NET — FFmpeg in C#: Transcode, Convert & Edit Video

// NuGet packages:
//   VisioForge.DotNet.VideoEdit
//   VisioForge.DotNet.Core.Redist.VideoEdit.x64
//   VisioForge.DotNet.Core.Redist.FFMPEG.x64   (FFmpeg.exe)

using System;
using VisioForge.Core.VideoEdit;
using VisioForge.Core.Types.VideoEdit;
using VisioForge.Core.Types.Output;
using VisioForge.Core.Types.FFMPEGEXE;

// .NET 6+ console app (top-level statements), no preview window
await using var core = new VideoEditCore();
core.ConsoleUsage = true;
core.Mode = VideoEditMode.Convert;

// Source file: its video and audio streams
var input = @"C:\Video\input.avi";
if (!await core.Input_AddVideoFileAsync(input))
{
    Console.WriteLine("Cannot open " + input);
    return 1;
}

// The second argument keeps the audio in sync with the video of the same file
if (!await core.Input_AddAudioFileAsync(input, input))
{
    Console.WriteLine("Could not add the audio track of " + input);
}

// MP4 with H.264 + AAC. The profile picks the first available GPU encoder
// (Intel Quick Sync, AMD AMF, NVIDIA NVENC), else Media Foundation H.264.
var ffmpeg = new FFMPEGEXEOutput(DefaultsProfile.MP4_H264_AAC, networkStreaming: false);

// Optional: choose the encoder yourself, e.g. HEVC on an NVIDIA GPU
// ffmpeg.Video = new HEVCNVENCSettings();

core.Output_Format = ffmpeg;
core.Output_Filename = @"C:\Video\output.mp4";

var errors = 0;
core.OnProgress += (s, e) => Console.WriteLine("Progress: " + e.Progress + "%");
core.OnError += (s, e) => { errors++; Console.WriteLine("Error: " + e.Message); };

// With ConsoleUsage = true, StartAsync returns when the conversion has finished
if (!await core.StartAsync() || errors > 0)
{
    Console.WriteLine("Failed");
    return 1;
}

Console.WriteLine("Done: " + core.Output_Filename);
return 0;