public static async Task MergeAudioAndSubs(string inputFile, string tempFolder) // https://superuser.com/a/277667
{
string containerExt = Path.GetExtension(inputFile);
string tempPath = Path.Combine(tempFolder, $"vid{containerExt}");
string outPath = Path.Combine(tempFolder, $"muxed{containerExt}");
File.Move(inputFile, tempPath);
string inName = Path.GetFileName(tempPath);
string outName = Path.GetFileName(outPath);
bool audio = Config.GetBool("keepAudio");
bool subs = Utils.ContainerSupportsSubs(containerExt, false) && Config.GetBool("keepSubs");
string[] audioTracks = audio ? IOUtils.GetFilesSorted(tempFolder, false, "*_audio.*") : new string[0]; // Find audio files
string[] subTracks = subs ? IOUtils.GetFilesSorted(tempFolder, false, "*.srt") : new string[0]; // Find subtitle files
Dictionary <int, string> trackFiles = new Dictionary <int, string>(); // Dict holding all track files with their index
foreach (string audioTrack in audioTracks) // Loop through audio streams to add them to the dict
{
trackFiles[Path.GetFileNameWithoutExtension(audioTrack).Split('_')[0].GetInt()] = audioTrack; // Add file, dict key is stream index
}
foreach (string subTrack in subTracks) // Loop through subtitle streams to add them to the dict
{
trackFiles[Path.GetFileNameWithoutExtension(subTrack).Split('_')[0].GetInt()] = subTrack; // Add file, dict key is stream index
}
string trackInputArgs = "";
string trackMapArgs = "";
string trackMetaArgs = "";
SortedDictionary <int, string> sortedTrackFiles = new SortedDictionary <int, string>(trackFiles);
int inputIndex = 1; // Input index (= output stream index) - Start at 1 since 0 is the video stream
foreach (KeyValuePair <int, string> track in sortedTrackFiles)
{
int streamIndex = track.Key;
string trackFile = track.Value;
trackInputArgs += $" -i {Path.GetFileName(trackFile)}"; // Input filename
if (Path.GetFileNameWithoutExtension(trackFile).Contains("_audio"))
{
trackMapArgs += $" -map {inputIndex}:a"; // Map input file (audio track)
}
else
{
trackMapArgs += $" -map {inputIndex}:s"; // Map input file (subtitle track)
}
string meta = Path.GetFileNameWithoutExtension(trackFile).Split('_')[1];
if (!string.IsNullOrWhiteSpace(meta))
{
if (Path.GetFileNameWithoutExtension(trackFile).Contains("_audio"))
{
trackMetaArgs += $" -metadata:s:{inputIndex} {meta}"; // Metadata
}
else
{
trackMetaArgs += $" -metadata:s:{inputIndex} language={meta}"; // Language
}
}
inputIndex++;
}
bool allAudioCodecsSupported = true;
foreach (string audioTrack in audioTracks)
{
if (!Utils.ContainerSupportsAudioFormat(Interpolate.current.outMode, Path.GetExtension(audioTrack)))
{
allAudioCodecsSupported = false;
}
}
if (!allAudioCodecsSupported)
{
Logger.Log("Warning: Input audio format(s) not fully supported in output container. Audio transfer will not be lossless.", false, false, "ffmpeg");
}
string subArgs = "-c:s " + Utils.GetSubCodecForContainer(containerExt);
string audioArgs = allAudioCodecsSupported ? "-c:a copy" : Utils.GetAudioFallbackArgs(Path.GetExtension(inputFile));
string args = $" -i {inName} {trackInputArgs} -map 0:v {trackMapArgs} -c:v copy {audioArgs} {subArgs} {trackMetaArgs} -shortest {outName}";
await RunFfmpeg(args, tempFolder, LogMode.Hidden);
// if (File.Exists(outPath) && IOUtils.GetFilesize(outPath) < 1024)
// {
// Logger.Log("Failed to merge audio losslessly! Trying to re-encode.", false, false, "ffmpeg");
//
// args = $" -i {inName} -stream_loop {looptimes} -i {audioName.Wrap()}" +
// $"{trackInputArgs} -map 0:v -map 1:a {trackMapArgs} -c:v copy {Utils.GetAudioFallbackArgs(Path.GetExtension(inputFile))} -c:s {subCodec} {trackMetaArgs} -shortest {outName}";
//
// await RunFfmpeg(args, tempFolder, LogMode.Hidden);
//
// if (File.Exists(outPath) && IOUtils.GetFilesize(outPath) < 1024)
// {
// Logger.Log("Failed to merge audio, even with re-encoding. Output will not have audio.", false, false, "ffmpeg");
// IOUtils.TryMove(tempPath, inputFile); // Move temp file back
// IOUtils.TryDeleteIfExists(tempPath);
// return;
// }
//
// string audioExt = Path.GetExtension(audioPath).Remove(".").ToUpper();
// Logger.Log($"Source audio ({audioExt}) has been re-encoded to fit into the target container ({containerExt.Remove(".").ToUpper()}). This may decrease the quality slightly.", false, true, "ffmpeg");
// }
if (File.Exists(outPath) && IOUtils.GetFilesize(outPath) > 512)
{
File.Delete(tempPath);
File.Move(outPath, inputFile);
}
else
{
File.Move(tempPath, inputFile);
}
}
public static async Task MergeStreamsFromInput(string inputVideo, string interpVideo, string tempFolder)
{
if (!File.Exists(inputVideo) && !I.current.inputIsFrames)
{
Logger.Log("Warning: Input video file not found, can't copy audio/subtitle streams to output video!");
return;
}
string containerExt = Path.GetExtension(interpVideo);
string tempPath = Path.Combine(tempFolder, $"vid{containerExt}");
string outPath = Path.Combine(tempFolder, $"muxed{containerExt}");
File.Move(interpVideo, tempPath);
string inName = Path.GetFileName(tempPath);
string outName = Path.GetFileName(outPath);
string subArgs = "-c:s " + Utils.GetSubCodecForContainer(containerExt);
bool audioCompat = Utils.ContainerSupportsAllAudioFormats(I.current.outMode, GetAudioCodecs(interpVideo));
string audioArgs = audioCompat ? "" : Utils.GetAudioFallbackArgs(I.current.outMode);
if (!Config.GetBool("keepAudio"))
{
audioArgs = "-an";
}
if (!Config.GetBool("keepSubs"))
{
subArgs = "-sn";
}
string mkvFix = I.current.outMode == I.OutMode.VidMkv ? "-max_interleave_delta 0" : ""; // https://www.reddit.com/r/ffmpeg/comments/efddfs/starting_new_cluster_due_to_timestamp/
if (QuickSettingsTab.trimEnabled)
{
string otherStreamsName = $"otherStreams{containerExt}";
string[] trim = FfmpegExtract.GetTrimArgs();
string args1 = $"{trim[0]} -i {inputVideo.Wrap()} {trim[1]} -vn -map 0 -c copy {audioArgs} {subArgs} {otherStreamsName}"; // Extract trimmed
await RunFfmpeg(args1, tempFolder, LogMode.Hidden);
string args2 = $"-i {inName} -i {otherStreamsName} -map 0:v:0 -map 1:a:? -map 1:s:? -c copy {audioArgs} {subArgs} {mkvFix} {outName}"; // Merge interp + trimmed original
await RunFfmpeg(args2, tempFolder, LogMode.Hidden);
IOUtils.TryDeleteIfExists(Path.Combine(tempFolder, otherStreamsName));
}
else // If trimming is disabled we can pull the streams directly from the input file
{
string args = $"-i {inName} -i {inputVideo.Wrap()} -map 0:v:0 -map 1:a:? -map 1:s:? -c copy {audioArgs} {subArgs} {mkvFix} {outName}";
await RunFfmpeg(args, tempFolder, LogMode.Hidden);
}
if (File.Exists(outPath) && IOUtils.GetFilesize(outPath) > 512)
{
File.Delete(tempPath);
File.Move(outPath, interpVideo);
}
else
{
File.Move(tempPath, interpVideo); // Muxing failed, move unmuxed video file back
}
}
