private void ParseMp4(FileStream fs)
{
int count = 0;
Position = 0;
fs.Seek(0, SeekOrigin.Begin);
bool moreBytes = true;
while (moreBytes)
{
moreBytes = InitializeSizeAndName(fs);
if (Size < 8)
{
return;
}
if (Name == "moov")
{
Moov = new Moov(fs, Position);
}
count++;
if (count > 100)
{
break;
}
if (Position > (ulong)fs.Length)
{
break;
}
fs.Seek((long)Position, SeekOrigin.Begin);
}
fs.Close();
}
private void ParseCmaf(Stream fs)
{
Subtitle = new Subtitle();
int count = 0;
Position = 0;
fs.Seek(0, SeekOrigin.Begin);
bool moreBytes = true;
var samples = new List <TimeSegment>();
var payloads = new List <string>();
while (moreBytes)
{
moreBytes = InitializeSizeAndName(fs);
if (Size < 8)
{
return;
}
if (Name == "moov" && Moov == null)
{
Moov = new Moov(fs, Position); // only scan first "moov" element
}
else if (Name == "mdat")
{
var mdat = new Mdat(fs, Position);
if (mdat.Payloads.Count > 0)
{
payloads.AddRange(mdat.Payloads);
}
}
else if (Name == "moof")
{
Moof = new Moof(fs, Position);
if (Moof.Traf?.Trun?.Samples.Count > 0)
{
samples.AddRange(Moof.Traf.Trun.Samples);
}
}
count++;
if (count > 10000)
{
break;
}
if (Position > (ulong)fs.Length)
{
break;
}
fs.Seek((long)Position, SeekOrigin.Begin);
}
fs.Close();
ulong timePeriodStart = 0; // ???
ulong timeScale = 0;
if (Moov?.Tracks[0].Mdia.Mdhd.TimeScale > 0)
{
timeScale = Moov.Tracks[0].Mdia.Mdhd.TimeScale;
}
if (Moov?.Mvhd?.TimeScale > 0)
{
timeScale = Moov.Mvhd.TimeScale;
}
int max = Math.Min(samples.Count, payloads.Count);
for (var i = 0; i < max; i++)
{
var presentation = samples[i];
var payload = payloads[i];
if (presentation.Duration.HasValue)
{
var startTime = presentation.TimeOffset.HasValue ? presentation.BaseMediaDecodeTime + presentation.TimeOffset.Value : presentation.BaseMediaDecodeTime;
var currentTime = startTime + presentation.Duration.Value;
// The payload can be null as that would mean that it was a VTTE and
// was only inserted to keep the presentation times in sync with the
// payloads.
if (payload != null)
{
Subtitle.Paragraphs.Add(new Paragraph(payload, timePeriodStart + startTime / timeScale, timePeriodStart + currentTime / timeScale));
}
}
}
Subtitle.Renumber();
}
private void ParseMp4(Stream fs)
{
int count = 0;
Position = 0;
fs.Seek(0, SeekOrigin.Begin);
bool moreBytes = true;
var timeTotalMs = 0d;
while (moreBytes)
{
moreBytes = InitializeSizeAndName(fs);
if (Size < 8)
{
return;
}
if (Name == "moov" && Moov == null)
{
Moov = new Moov(fs, Position); // only scan first "moov" element
}
else if (Name == "moof")
{
Moof = new Moof(fs, Position);
}
else if (Name == "mdat" && Moof != null && Moof?.Traf?.Trun?.Samples?.Count > 0)
{
var mdat = new Mdat(fs, Position);
if (mdat.Payloads.Count > 0)
{
if (Moof.Traf?.Trun?.Samples.Count > 0 && Moof?.Traf?.Trun?.Samples.Count >= mdat.Payloads.Count)
{
if (VttcSubtitle == null)
{
VttcSubtitle = new Subtitle();
}
var timeScale = (double)(Moov?.Mvhd?.TimeScale ?? 1000.0);
var sampleIdx = 0;
foreach (var payload in mdat.Payloads)
{
var presentation = Moof.Traf.Trun.Samples[sampleIdx];
if (presentation.Duration.HasValue)
{
var before = timeTotalMs;
timeTotalMs += presentation.Duration.Value / timeScale * 1000.0;
sampleIdx++;
if (payload != null)
{
VttcSubtitle.Paragraphs.Add(new Paragraph(payload, before, timeTotalMs));
}
}
}
}
Moof = null;
}
}
count++;
if (count > 1000)
{
break;
}
if (Position > (ulong)fs.Length)
{
break;
}
fs.Seek((long)Position, SeekOrigin.Begin);
}
fs.Close();
if (VttcSubtitle != null)
{
var merged = MergeLinesSameTextUtils.MergeLinesWithSameTextInSubtitle(VttcSubtitle, false, 250);
VttcSubtitle = merged;
}
}
private void ParseMp4(FileStream fs, TreeView treeView)
{
var samples = new List <TimeSegment>();
var payloads = new List <string>();
int count = 0;
Position = 0;
fs.Seek(0, SeekOrigin.Begin);
bool moreBytes = true;
while (moreBytes)
{
moreBytes = InitializeSizeAndName(fs);
if (Size < 8)
{
return;
}
if (Name == "moov")
{
var node = new TreeNode(Name)
{
Tag = "Element: " + Name + " - Movie" + Environment.NewLine +
"Size: " + Size
};
treeView?.Nodes.Add(node);
Moov = new Moov(fs, Position, node);
}
else if (Name == "mdat")
{
var node = new TreeNode(Name)
{
Tag = "Element: " + Name + " - Media Data" + Environment.NewLine +
"Size: " + Size + Environment.NewLine +
"Position: " + StartPosition
};
treeView?.Nodes.Add(node);
var mdat = new Mdat(fs, Position, node);
if (mdat.Payloads.Count > 0)
{
payloads.AddRange(mdat.Payloads);
}
}
else if (Name == "moof")
{
var node = new TreeNode(Name)
{
Tag = "Element: " + Name + " - " + Environment.NewLine +
"Size: " + Size + Environment.NewLine +
"Position: " + StartPosition
};
treeView?.Nodes.Add(node);
Moof = new Moof(fs, Position, node);
if (Moof.Traf?.Trun?.Samples.Count > 0)
{
samples.AddRange(Moof.Traf.Trun.Samples);
}
}
else
{
treeView?.Nodes.Add(new TreeNode(Name)
{
Tag = "Element: " + Name + " - " + Environment.NewLine +
"Size: " + Size + Environment.NewLine +
"Position: " + StartPosition
});
}
count++;
if (count > 1000)
{
break;
}
if (Position > (ulong)fs.Length)
{
break;
}
fs.Seek((long)Position, SeekOrigin.Begin);
}
fs.Close();
}
private void ParseMp4(FileStream fs)
{
int count = 0;
Position = 0;
fs.Seek(0, SeekOrigin.Begin);
bool moreBytes = true;
while (moreBytes)
{
moreBytes = InitializeSizeAndName(fs);
if (Size < 8)
{
return;
}
if (Name == "moov" && Moov == null)
{
Moov = new Moov(fs, Position); // only scan first "moov" element
}
count++;
if (count > 100)
{
break;
}
if (Position > (ulong)fs.Length)
{
break;
}
fs.Seek((long)Position, SeekOrigin.Begin);
}
fs.Close();
}
