// method 1: add preview as separate track with slightly bigger resolution (via Pituz)
static void GeneratePreview(string filePath)
{
OutputProcessor sp = new SimpleProcessor();
ProcessingUnit pu = sp.CreateOne();
string fileName = Path.GetFileName(filePath),
output = filePath.Substring(0, filePath.LastIndexOf('.') + 1) + "preview.webm",
previewSource = ArgList.Get(Arg.PREVIEW_SOURCE) ? GetFullPath(ArgList.Get(Arg.PREVIEW_SOURCE).AsString()) : filePath,
previewTiming = ArgList.Get(Arg.PREVIEW).AsString();
// Preview
long time = DateTime.Now.ToFileTimeUtc();
string previewWebm = GetFolder(filePath) + "\\preview_" + time.ToString() + ".webm";
// Same scale
Ffprober.Result result = Ffprober.Probe(filePath);
string scale = result.Scale;
scale = scale == null ? string.Empty : $",scale={result.WidthPix + 1}:-1";
scale = $"-filter:v:1 \"trim=end_frame=2{scale}\"";
string args = $"-hide_banner -i \"{filePath}\" -ss {previewTiming} -i \"{previewSource}\" -c copy -map 0:v -map 0:a -map 1:v -c:v:1 vp9 -b:v:1 0 -crf 8 -speed 1 {scale} \"{output}\"";
ExecuteFFMPEG(args, pu);
sp.Destroy(pu);
}
static void GeneratePreviewOld(string filePath)
{
OutputProcessor sp = new SimpleProcessor();
ProcessingUnit pu = sp.CreateOne();
string fileName = Path.GetFileName(filePath),
output = filePath.Substring(0, filePath.LastIndexOf('.') + 1) + "preview.webm",
previewSource = ArgList.Get(Arg.PREVIEW_SOURCE) ? GetFullPath(ArgList.Get(Arg.PREVIEW_SOURCE).AsString()) : filePath,
previewTiming = ArgList.Get(Arg.PREVIEW).AsString();
// Preview
long time = DateTime.Now.ToFileTimeUtc();
string previewWebm = GetFolder(filePath) + "\\preview_" + time.ToString() + ".webm";
// Same scale
Ffprober.Result result = Ffprober.Probe(filePath);
string scale = result.Scale;
scale = scale == null ? string.Empty : (",scale=" + scale);
scale = $"-vf \"trim=end_frame=2{scale}\"";
string args = $"-hide_banner -ss {previewTiming} -i \"{previewSource}\" -c:v vp9 -pix_fmt +yuv420p -b:v 0 -crf 8 -speed 1 -an -sn {scale} \"{previewWebm}\"";
ExecuteFFMPEG(args, pu);
// Bad muxing fix
string videoOnly = $"video_{time}.webm";
args = $"-hide_banner -i \"{filePath}\" -c copy -map 0:v \"{videoOnly}\"";
ExecuteFFMPEG(args, pu);
// Concat
string concatedWebm = $"concat_{time}.webm";
string concatFile = $"concat_{time}.txt";
File.WriteAllText(concatFile, $"file '{previewWebm}'\r\nfile '{videoOnly}'", Encoding.Default);
string fps = result.Framerate;
string dur = Ffprober.Probe(previewWebm).EndTime;
if (dur == null)
dur = "0.042";
args = $"-hide_banner -f concat -i \"{concatFile}\" -c copy \"{concatedWebm}\"";
ExecuteFFMPEG(args, pu);
args = $"-hide_banner -y -itsoffset 0.5 -i \"{filePath}\" -i \"{concatedWebm}\" -map 1:v -map 0:a -c copy \"{output}\"";
ExecuteFFMPEG(args, pu);
// Delete
File.Delete(concatFile);
File.Delete(previewWebm);
File.Delete(concatedWebm);
File.Delete(videoOnly);
sp.Destroy(pu);
}
static string Encode(long i, string file, string subs, TimeSpan start, TimeSpan end, int sizeLimit, int crf)
{
// subs = *.ass
if (subs != null && subs.StartsWith("*"))
subs = file.Substring(0, file.LastIndexOf('.')) + subs.Substring(1);
// subs = same
if (subs == "same")
subs = file;
bool subsWereCopied = false;
string subsFilename = Path.GetFileName(subs);
if (ArgList.Get(Arg.FIX_SUBS) && SubStationAlpha.IsAcceptable(subs))
{
string subsNew = Path.Combine(Environment.CurrentDirectory, subsFilename);
subsFilename += i.ToString() + "_ARIAL.ass";
SubStationAlpha ssa = new SubStationAlpha(subs);
ssa.ChangeFontAndSave(subsNew);
subs = subsNew;
subsWereCopied = true;
}
string code = null;
if (i < 10000)
code = $"{i}_{DateTime.Now.ToFileTimeUtc()}";
else
code = i.ToString();
string filePath = GetFolder(file),
webmPath = Path.Combine(filePath, $"temp_{code}.webm"),
oggPath = Path.Combine(filePath, $"temp_{code}.ogg"),
finalPath = Path.Combine(filePath, $"{ArgList.Get(Arg.NAME_PREFIX).AsString()}{code}.webm");
TimeSpan timeLength = end - start;
string startString = start.ToString("hh\\:mm\\:ss\\.fff"),
timeLengthString = timeLength.ToString("hh\\:mm\\:ss\\.fff");
OutputProcessor sp = new SimpleProcessor();
ProcessingUnit pu = sp.CreateOne();
// Audio settings
string mapAudio = ArgList.Get(Arg.MAP_AUDIO) ? $"-map 0:a:{ArgList.Get(Arg.MAP_AUDIO).AsInt()}" : string.Empty;
int opusRate = ArgList.Get(Arg.OPUS_RATE).AsInt();
string audioFile = ArgList.Get(Arg.AUDIO_FILE) ? GetFullPath(ArgList.Get(Arg.AUDIO_FILE).AsString()) : file;
string otherAudio = ArgList.Get(Arg.OTHER_AUDIO).AsString();
int vorbis = ArgList.Get(Arg.VORBIS) ? ArgList.Get(Arg.VORBIS).AsInt() : -1;
string codecParams = vorbis == -1 ? $"-c:a opus -b:a {opusRate}K -vbr on" : $"-c:a libvorbis -q:a {vorbis}";
// Encode audio
string args = $"-hide_banner -y -ss {startString} -i \"{audioFile}\" {mapAudio} -ac 2 {codecParams} -vn -sn -t {timeLengthString} {otherAudio} \"{oggPath}\"";
// Audio cache
Cache.ACKey aKey = new Cache.ACKey(args);
bool aCached = Cache.Instance.CreateIfPossible(aKey, oggPath);
if (!aCached)
{
ExecuteFFMPEG(args, pu);
Cache.Instance.Save(aKey, oggPath);
}
// No upscale check
string scale = ArgList.Get(Arg.SCALE).AsString();
if (scale != "no" && !ArgList.Get(Arg.UPSCALE))
{
string oScale = Ffprober.Probe(file).Scale;
string[] scaleSplit = oScale.Split('x');
if (scaleSplit.Length == 2)
{
int oWidth = int.Parse(scaleSplit[0]);
int oHeight = int.Parse(scaleSplit[1]);
scaleSplit = scale.Split(':');
int width = int.Parse(scaleSplit[0]);
int height = int.Parse(scaleSplit[1]);
if (width > oWidth || height > oHeight)
scale = "no";
}
}
// VideoFilter
const string vfDefault = "-vf \"";
StringBuilder vf = new StringBuilder(vfDefault);
Action addSubs = () =>
{
if (subs != null)
{
string format = subs.EndsWith("ass") || subs.EndsWith("ssa") ? "ass='{0}'{1}" : "subtitles='{0}'{1}";
format = string.Format(format, subs.Replace(@"\", @"\\").Replace(":", @"\:"), ArgList.Get(Arg.SUBS_INDEX).Command);
format = string.Format(new CultureInfo("en"), "setpts=PTS+{0:0.######}/TB,{1},setpts=PTS-STARTPTS", start.TotalSeconds, format);
vf.AppendIfPrev(",").AppendForPrev(format);
}
};
Action addScale = () =>
{
if (scale != "no")
vf.AppendIfPrev(",").AppendForPrev($"scale={scale}:sws_flags=lanczos");
};
if (ArgList.Get(Arg.CROP))
{
string crop = GetCrop(file, startString, timeLengthString);
if (crop != null)
vf.AppendIfPrev(",").AppendForPrev(crop);
pu.Write("CROP: " + crop);
}
if (ArgList.Get(Arg.CROP_V))
vf.AppendIfPrev(",").AppendForPrev("crop=" + ArgList.Get(Arg.CROP_V).AsString());
if (ArgList.Get(Arg.SUBS_FIRST))
{
addSubs();
addScale();
}
else
{
addScale();
addSubs();
}
if (vf.Length == vfDefault.Length)
vf.Clear();
else
vf.Append("\" ");
// Encode 2-pass video
StringBuilder otherVideo = new StringBuilder();
otherVideo.AppendForPrev(ArgList.Get(Arg.OTHER_VIDEO).AsString()).AppendIfPrev(" ");
if (crf < 4 || crf > 63)
{
crf = ushort.MaxValue;
if (ArgList.Get(Arg.CRF_MODE))
try { crf = ushort.Parse(ArgList.Get(Arg.CRF_MODE).Value); if (crf < 4 || crf > 63) crf = ushort.MaxValue; }
catch { }
}
string threadSettings;
if (ArgList.Get(Arg.SINGLE_THREAD))
threadSettings = "-tile-columns 0 -frame-parallel 0 -threads 1 -speed 1";
else
threadSettings = $"-tile-columns {Environment.ProcessorCount} -frame-parallel 1 -threads {Environment.ProcessorCount} -speed 1";
// Pass 1 cache
string logPath = Path.Combine(Environment.CurrentDirectory, $"temp_{code}-0.log");
Cache.FPCKey key = new Cache.FPCKey(file, vf.ToString(), startString, timeLengthString);
bool cached = Cache.Instance.CreateIfPossible(key, logPath);
// If CRF_MODE
if (crf != ushort.MaxValue)
{
if (!cached)
{
args = $"-hide_banner -y -ss {startString} -i \"{file}\" -c:v vp9 -pix_fmt +yuv420p {vf} -crf {crf} -b:v 0 {threadSettings} -an -t {timeLengthString} -sn -lag-in-frames 25 -pass 1 -auto-alt-ref 1 -passlogfile temp_{code} -f null -y NUL";
ExecuteFFMPEG(args, pu);
Cache.Instance.Save(key, logPath);
}
args = $"-hide_banner -y -ss {startString} -i \"{file}\" -c:v vp9 -pix_fmt +yuv420p {vf} -crf {crf} -b:v 0 {threadSettings} -an -t {timeLengthString} -sn -lag-in-frames 25 -pass 2 -auto-alt-ref 1 -passlogfile temp_{code} \"{webmPath}\"";
ExecuteFFMPEG(args, pu);
}
else
{
double audioSize = GetSizeKB(oggPath);
int bitrate = (int)((sizeLimit - audioSize) * 8 / timeLength.TotalSeconds);
string bitrateString = $"-b:v {bitrate}K";
if (!cached)
{
args = $"-hide_banner -y -ss {startString} -i \"{file}\" -c:v vp9 -pix_fmt +yuv420p {bitrateString} {threadSettings} -an {vf} -t {timeLengthString} -sn {otherVideo} -lag-in-frames 25 -pass 1 -auto-alt-ref 1 -passlogfile temp_{code} -f null -y NUL";
ExecuteFFMPEG(args, pu);
Cache.Instance.Save(key, logPath);
}
args = $"-hide_banner -y -ss {startString} -i \"{file}\" -c:v vp9 -pix_fmt +yuv420p {bitrateString} {threadSettings} -an {vf} -t {timeLengthString} -sn {otherVideo} -lag-in-frames 25 -pass 2 -auto-alt-ref 1 -passlogfile temp_{code} \"{webmPath}\"";
ExecuteFFMPEG(args, pu);
}
// Concat
args = $"-hide_banner -y -i \"{webmPath}\" -i \"{oggPath}\" -c copy -metadata title=\"{Path.GetFileNameWithoutExtension(file)} [github.com/CherryPerry/ffmpeg-vp9-wrap]\" \"{finalPath}\"";
ExecuteFFMPEG(args, pu);
// Delete
if (subsWereCopied)
File.Delete(subs);
File.Delete(webmPath);
File.Delete(oggPath);
File.Delete(logPath);
sp.Destroy(pu);
return finalPath;
}