public string GetFFmpegArgs()
{
StringBuilder args = new StringBuilder();
// input FPS
args.AppendFormat("-r {0} ", ScreenRecordFPS);
if (string.IsNullOrEmpty(FFmpeg.VideoSource) || FFmpeg.VideoSource.Equals(FFmpegHelper.GDIgrab, StringComparison.InvariantCultureIgnoreCase))
{
// http://ffmpeg.org/ffmpeg-devices.html#gdigrab
args.AppendFormat("-f gdigrab -framerate {0} -offset_x {1} -offset_y {2} -video_size {3}x{4} -draw_mouse {5} -show_region {6} -i desktop ",
ScreenRecordFPS, CaptureArea.X, CaptureArea.Y, CaptureArea.Width, CaptureArea.Height, DrawCursor ? 1 : 0, 0);
if (FFmpeg.IsAudioSourceSelected())
{
args.AppendFormat("-f dshow -i audio=\"{0}\" ", FFmpeg.AudioSource);
}
}
else
{
// https://github.com/rdp/screen-capture-recorder-to-video-windows-free configuration section
string dshowRegistryPath = "Software\\screen-capture-recorder";
RegistryHelpers.CreateRegistry(dshowRegistryPath, "start_x", CaptureArea.X);
RegistryHelpers.CreateRegistry(dshowRegistryPath, "start_y", CaptureArea.Y);
RegistryHelpers.CreateRegistry(dshowRegistryPath, "capture_width", CaptureArea.Width);
RegistryHelpers.CreateRegistry(dshowRegistryPath, "capture_height", CaptureArea.Height);
RegistryHelpers.CreateRegistry(dshowRegistryPath, "default_max_fps", ScreenRecordFPS);
RegistryHelpers.CreateRegistry(dshowRegistryPath, "capture_mouse_default_1", DrawCursor ? 1 : 0);
args.Append("-f dshow -i ");
// dshow audio/video device: https://github.com/rdp/screen-capture-recorder-to-video-windows-free
args.AppendFormat("video=\"{0}\"", FFmpeg.VideoSource);
if (FFmpeg.IsAudioSourceSelected())
{
args.AppendFormat(":audio=\"{0}\" ", FFmpeg.AudioSource);
}
else
{
args.Append(" ");
}
}
if (!string.IsNullOrEmpty(FFmpeg.UserArgs))
{
args.Append(FFmpeg.UserArgs + " ");
}
args.AppendFormat("-c:v {0} ", FFmpeg.VideoCodec.ToString());
// output FPS
args.AppendFormat("-r {0} ", ScreenRecordFPS);
switch (FFmpeg.VideoCodec)
{
case FFmpegVideoCodec.libx264: // https://trac.ffmpeg.org/wiki/x264EncodingGuide
args.AppendFormat("-crf {0} ", FFmpeg.x264_CRF);
args.AppendFormat("-preset {0} ", FFmpeg.Preset.ToString());
break;
case FFmpegVideoCodec.libvpx: // https://trac.ffmpeg.org/wiki/vpxEncodingGuide
args.AppendFormat("-crf {0} ", FFmpeg.VPx_CRF);
break;
case FFmpegVideoCodec.libxvid: // https://trac.ffmpeg.org/wiki/How%20to%20encode%20Xvid%20/%20DivX%20video%20with%20ffmpeg
args.AppendFormat("-qscale:v {0} ", FFmpeg.XviD_qscale);
break;
}
// -pix_fmt yuv420p required for libx264 otherwise can't stream in Chrome
if (FFmpeg.VideoCodec == FFmpegVideoCodec.libx264)
{
args.Append("-pix_fmt yuv420p -tune zerolatency ");
}
if (FFmpeg.IsAudioSourceSelected())
{
switch (FFmpeg.AudioCodec)
{
case FFmpegAudioCodec.libvorbis: // http://trac.ffmpeg.org/wiki/TheoraVorbisEncodingGuide
args.AppendFormat("-c:a {0} -qscale:a {1} ", FFmpegAudioCodec.libvorbis.ToString(), FFmpeg.Vorbis_qscale);
break;
case FFmpegAudioCodec.libmp3lame: // http://trac.ffmpeg.org/wiki/Encoding%20VBR%20(Variable%20Bit%20Rate)%20mp3%20audio
args.AppendFormat("-c:a {0} -qscale:a {1} ", FFmpegAudioCodec.libmp3lame.ToString(), FFmpeg.MP3_qscale);
break;
case FFmpegAudioCodec.libvoaacenc: // http://trac.ffmpeg.org/wiki/AACEncodingGuide
args.AppendFormat("-c:a libvo_aacenc -ac 2 -b:a {0}k ", FFmpeg.AAC_bitrate); // -ac 2 required otherwise failing with 7.1
break;
}
}
if (Duration > 0)
{
args.AppendFormat("-t {0} ", Duration);
}
// -y for overwrite file
args.Append("-y ");
args.AppendFormat("\"{0}\"", Path.ChangeExtension(OutputPath, FFmpeg.Extension));
return(args.ToString());
}
private string GetFFmpegArgs()
{
StringBuilder args = new StringBuilder();
// -y for overwrite file
args.Append("-y ");
// default real time buffer size was 3041280 (3M)
args.Append("-rtbufsize 10M ");
if (string.IsNullOrEmpty(FFmpeg.VideoSource) || FFmpeg.VideoSource.Equals(FFmpegHelper.GDIgrab, StringComparison.InvariantCultureIgnoreCase))
{
// http://ffmpeg.org/ffmpeg-devices.html#gdigrab
args.AppendFormat("-f gdigrab -framerate {0} -offset_x {1} -offset_y {2} -video_size {3}x{4} -draw_mouse {5} -show_region {6} -i desktop ",
ScreenRecordFPS, CaptureArea.X, CaptureArea.Y, CaptureArea.Width, CaptureArea.Height, DrawCursor ? 1 : 0, 0);
if (FFmpeg.IsAudioSourceSelected())
{
args.AppendFormat("-f dshow -i audio=\"{0}\" ", FFmpeg.AudioSource);
}
}
else
{
args.AppendFormat("-f dshow -framerate {0} -i video=\"{1}\"", ScreenRecordFPS, FFmpeg.VideoSource);
if (FFmpeg.IsAudioSourceSelected())
{
args.AppendFormat(":audio=\"{0}\" ", FFmpeg.AudioSource);
}
else
{
args.Append(" ");
}
}
if (!string.IsNullOrEmpty(FFmpeg.UserArgs))
{
args.Append(FFmpeg.UserArgs + " ");
}
args.AppendFormat("-c:v {0} ", FFmpeg.VideoCodec.ToString());
// output FPS
args.AppendFormat("-r {0} ", ScreenRecordFPS);
switch (FFmpeg.VideoCodec)
{
case FFmpegVideoCodec.libx264: // https://trac.ffmpeg.org/wiki/x264EncodingGuide
args.AppendFormat("-crf {0} ", FFmpeg.x264_CRF);
args.AppendFormat("-preset {0} ", FFmpeg.Preset.ToString());
args.AppendFormat("-tune {0} ", "zerolatency");
// -pix_fmt yuv420p required otherwise can't stream in Chrome
args.Append("-pix_fmt yuv420p ");
break;
case FFmpegVideoCodec.libvpx: // https://trac.ffmpeg.org/wiki/vpxEncodingGuide
args.AppendFormat("-crf {0} ", FFmpeg.VPx_CRF);
break;
case FFmpegVideoCodec.libxvid: // https://trac.ffmpeg.org/wiki/How%20to%20encode%20Xvid%20/%20DivX%20video%20with%20ffmpeg
args.AppendFormat("-qscale:v {0} ", FFmpeg.XviD_qscale);
break;
}
if (FFmpeg.IsAudioSourceSelected())
{
switch (FFmpeg.AudioCodec)
{
case FFmpegAudioCodec.libvoaacenc: // http://trac.ffmpeg.org/wiki/AACEncodingGuide
args.AppendFormat("-c:a libvo_aacenc -ac 2 -b:a {0}k ", FFmpeg.AAC_bitrate); // -ac 2 required otherwise failing with 7.1
break;
case FFmpegAudioCodec.libvorbis: // http://trac.ffmpeg.org/wiki/TheoraVorbisEncodingGuide
args.AppendFormat("-c:a {0} -qscale:a {1} ", FFmpegAudioCodec.libvorbis.ToString(), FFmpeg.Vorbis_qscale);
break;
case FFmpegAudioCodec.libmp3lame: // http://trac.ffmpeg.org/wiki/Encoding%20VBR%20(Variable%20Bit%20Rate)%20mp3%20audio
args.AppendFormat("-c:a {0} -qscale:a {1} ", FFmpegAudioCodec.libmp3lame.ToString(), FFmpeg.MP3_qscale);
break;
}
}
if (Duration > 0)
{
// duration limit
args.AppendFormat("-t {0} ", Duration);
}
args.AppendFormat("\"{0}\"", Path.ChangeExtension(OutputPath, FFmpeg.Extension));
return(args.ToString());
}
