private MemoryStream GetThumbnailFromProcess(Process p, ref int width, ref int height)
{
Debug("Starting ffmpeg");
using (var thumb = new MemoryStream()) {
var pump = new StreamPump(p.StandardOutput.BaseStream, thumb, null, 4096);
if (!p.WaitForExit(20000))
{
p.Kill();
throw new ArgumentException("ffmpeg timed out");
}
if (p.ExitCode != 0)
{
throw new ArgumentException("ffmpeg does not understand the stream");
}
Debug("Done ffmpeg");
if (!pump.Wait(2000))
{
throw new ArgumentException("stream reading timed out");
}
using (var img = Image.FromStream(thumb)) {
using (var scaled = ThumbnailMaker.ResizeImage(img, ref width, ref height)) {
var rv = new MemoryStream();
try {
scaled.Save(rv, ImageFormat.Jpeg);
return(rv);
}
catch (Exception) {
rv.Dispose();
throw;
}
}
}
}
}
private static MemoryStream GetThumbnailFromProcess(Process p,
ref int width,
ref int height)
{
var lastPosition = 0L;
using (var thumb = StreamManager.GetStream())
{
using (var pump = new StreamPump(
p.StandardOutput.BaseStream, thumb, 4096))
{
pump.Pump(null);
while (!p.WaitForExit(20000))
{
if (lastPosition != thumb.Position)
{
lastPosition = thumb.Position;
continue;
}
p.Kill();
throw new ArgumentException("ffmpeg timed out");
}
if (p.ExitCode != 0)
{
throw new ArgumentException("ffmpeg does not understand the stream");
}
if (!pump.Wait(2000))
{
throw new ArgumentException("stream reading timed out");
}
if (thumb.Length == 0)
{
throw new ArgumentException("ffmpeg did not produce a result");
}
using (var img = Image.FromStream(thumb))
{
using (var scaled = ThumbnailMaker.ResizeImage(img, width, height,
ThumbnailMakerBorder.Bordered))
{
width = scaled.Width;
height = scaled.Height;
var rv = new MemoryStream();
try
{
scaled.Save(rv, ImageFormat.Jpeg);
return(rv);
}
catch (Exception)
{
rv.Dispose();
throw;
}
}
}
}
}
}
public MemoryStream GetThumbnail(object item, ref int width, ref int height)
{
Image img = null;
if (item is Stream)
{
img = Image.FromStream(item as Stream);
}
else
if (item is FileInfo)
{
img = Image.FromFile((item as FileInfo).FullName);
}
else
{
throw new NotSupportedException();
}
using (img) {
using (var scaled = ThumbnailMaker.ResizeImage(img, ref width, ref height)) {
var rv = new MemoryStream();
try {
scaled.Save(rv, ImageFormat.Jpeg);
return(rv);
}
catch (Exception) {
rv.Dispose();
throw;
}
}
}
}
private MemoryStream GetThumbnailInternal(FileInfo file, ref int width,
ref int height)
{
if (file.Extension == ".mkv" && MKVTools.Loaded)
{
var thumbIdx = MKVTools.FindThumbnail(file.FullName);
if (thumbIdx != MKVTools.NoThumbnail)
{
var origThumb = MKVTools.ExtractThumbnail(file.FullName, thumbIdx);
var origImage = Image.FromStream(origThumb);
var scaled = ThumbnailMaker.ResizeImage(origImage, width, height, ThumbnailMakerBorder.Bordered);
var rv = new MemoryStream();
scaled.Save(rv, ImageFormat.Jpeg);
return(rv);
}
}
Exception last = null;
for (var best = IdentifyBestCapturePosition(file);
best >= 0;
best -= Math.Max(best / 2, 5))
{
try
{
using (var p = new Process())
{
var sti = p.StartInfo;
#if !DEBUG
sti.CreateNoWindow = true;
#endif
sti.UseShellExecute = false;
sti.FileName = FFmpeg.FFmpegExecutable;
sti.Arguments = $"-v quiet -ss {best} -i \"{file.FullName}\" -an -frames:v 1 -f image2 pipe:";
sti.LoadUserProfile = false;
sti.RedirectStandardOutput = true;
p.Start();
DebugFormat("Running: {0} {1}", sti.FileName, sti.Arguments);
return(GetThumbnailFromProcess(p, ref width, ref height));
}
}
catch (Exception ex)
{
last = ex;
}
}
throw last ?? new Exception("Not reached");
}
public MemoryStream GetThumbnail(object item, ref int width,
ref int height)
{
Image img;
var stream = item as Stream;
if (stream != null)
{
img = Image.FromStream(stream);
}
else
{
var fi = item as FileInfo;
if (fi != null)
{
img = Image.FromFile(fi.FullName);
}
else
{
throw new NotSupportedException();
}
}
using (img)
{
using (var scaled = ThumbnailMaker.ResizeImage(
img, width, height, ThumbnailMakerBorder.Borderless))
{
width = scaled.Width;
height = scaled.Height;
var rv = new MemoryStream();
try
{
scaled.Save(rv, ImageFormat.Jpeg);
return(rv);
}
catch (Exception)
{
rv.Dispose();
throw;
}
}
}
}
