private void ConvertZoomVideoFile(ConversionConfiguration config, bool preview)
{
string args = "-i \"" + config.SlideVideoPath + "\" " +
"-f mp4 -vcodec libx264 -crf 23 -preset veryfast -tune stillimage -profile:v baseline -level 3.0 -pix_fmt yuv420p -r 30 " + (preview ? " -t 10 " : "") + "\"" + Path.Combine(config.OutputDirectory, "slides.mp4") + "\" ";
_logger.LogInformation("Execute ffmpeg: {0}", args);
Process p = FFmpegHelper.FFmpeg(args, false);
p.Start();
p.WaitForExit();
}
private void ConvertVideoFiles(ConversionConfiguration config, bool preview)
{
var lenSlideVideo = FFmpegHelper.GetMediaLength(config.SlideVideoPath);
var lenTHVideo = FFmpegHelper.GetMediaLength(config.TalkingHeadVideoPath);
var trimTHVideo = lenTHVideo - lenSlideVideo;
// normalize audio
var audioLevels = FFmpegHelper.GetAudioLevels(config.TalkingHeadVideoPath);
string audioFilter = "[1:a]";
if (audioLevels != null)
{
audioFilter = $"[1:a]loudnorm=I=-23:LRA=11:tp=-1:measured_I={audioLevels.Input_I}:measured_LRA={audioLevels.Input_Lra}:measured_tp={audioLevels.Input_Tp}:measured_thresh={audioLevels.Input_Thresh}:offset={audioLevels.Target_Offset}:linear=true[1a];[1a]";
}
// run processing
string args = "-i \"" + config.SlideVideoPath + "\" " +
"-i \"" + config.TalkingHeadVideoPath + "\" " +
"-i \"" + config.RecordingStyle.TargetDimension.Background + "\" " +
// video filters
"-filter_complex " +
"\"" +
"[1:v]trim=start=" + trimTHVideo.TotalSeconds.ToString("0.00000", CultureInfo.InvariantCulture) + ",setpts=PTS-STARTPTS[1v];" +
audioFilter +
"atrim=start=" + trimTHVideo.TotalSeconds.ToString("0.00000", CultureInfo.InvariantCulture) + ",asetpts=PTS-STARTPTS,asplit=2[1a1][1a2];" +
config.RecordingStyle.getFFmpegFilterString() +
"\" " +
"-map \"[slides1]\" -f mp4 -vcodec libx264 -crf 23 -preset veryfast -tune stillimage -profile:v baseline -level 3.0 -pix_fmt yuv420p -r 30 " + (preview ? " -t 10 " : "") + "\"" + Path.Combine(config.OutputDirectory, "slides.mp4") + "\" " +
"-map \"[th_ck_ct]\" -map \"[1a1]\" -f mp4 -vcodec libx264 -crf 23 -preset veryfast -profile:v baseline -level 3.0 -pix_fmt yuv420p -r 30 -acodec aac -b:a 192k " + (preview ? " -t 10 " : "") + "\"" + Path.Combine(config.OutputDirectory, "talkinghead.mp4") + "\" " +
"-map \"[stage]\" -map \"[1a2]\" -f mp4 -vcodec libx264 -crf 23 -preset veryfast -profile:v baseline -level 3.0 -pix_fmt yuv420p -r 30 -acodec aac -b:a 192k " + (preview ? " -t 10 " : "") + "\"" + Path.Combine(config.OutputDirectory, "stage.mp4") + "\" ";
_logger.LogInformation("Execute ffmpeg: {0}", args);
Process p = FFmpegHelper.FFmpeg(args, false);
p.Start();
p.WaitForExit();
}