public void addFile(string filename)
{
_filename = filename;
int n = 1;
//List<ListViewItem> items = new List<ListViewItem>();
FileStream stream = new FileStream(_filename, FileMode.Open, FileAccess.Read);
_parser = new FlvParser(stream, (tag) =>
{
string[] s = new string[] {
n++.ToString(),
tag.Type.ToString(),
ByteUtil.GetTime(tag.TimeStamp),
tag.Info1,
tag.Info2,
"0x" + tag.Offset.ToString("X8"),
tag.DataSize.ToString()
};
FlvParser.TagType type = tag.Type;
if (type == FlvParser.TagType.Audio)
{
FlvParser.AudioTag atag = tag as FlvParser.AudioTag;
}
else if (type == FlvParser.TagType.Video)
{
FlvParser.VideoTag vtag = tag as FlvParser.VideoTag;
}
else if (type == FlvParser.TagType.Script)
{
}
return(true);
});
stream.Close();
stream.Dispose();
if (!_parser.IsFlv)
{
//无法识别
}
else
{
}
}
private void WriteHead(Stream dest, long datasize, double duration, double vcodec, double acodec,
double framerate, double x, uint offset_b, int f1, int f2, bool reserve)
{
int framecount = f2 - f1 + 1;
if (framecount <= 0)
{
throw new Exception("帧不能为空！");
}
double audiosize = 0;
double videosize = 0;
double audiocodec = acodec;
double videocodec = vcodec;
double lasttimestamp = 0;
double lastkeyframetimestamp = 0;
double lastkeyframelocation = 0;
List <double> filepositions = new List <double>();
List <double> times = new List <double>();
long first_offset = 0;
bool res = reserve;
for (int i = f1; i <= f2; i++)
{
if ((first_offset == 0) && !(_parser.Tags[i] is FlvParser.ScriptTag))
{
first_offset = _parser.Tags[i].Offset;
}
FlvParser.AudioTag atag = _parser.Tags[i] as FlvParser.AudioTag;
if (atag != null)
{
if (audiocodec < 0)
{
audiocodec = atag.CodecId;
}
audiosize += atag.DataSize + 11;
continue;
}
FlvParser.VideoTag vtag = _parser.Tags[i] as FlvParser.VideoTag;
if (vtag != null)
{
if (videocodec < 0)
{
videocodec = vtag.CodecId;
}
videosize += vtag.DataSize + 11;
lasttimestamp = Math.Round((vtag.TimeStamp - offset_b) * x) / 1000.0;
if (vtag.FrameType == "keyframe")
{
if (res)
{
lasttimestamp = vtag.TimeStamp / 1000.0;
res = false;
}
lastkeyframetimestamp = lasttimestamp;
lastkeyframelocation = vtag.Offset - first_offset;
filepositions.Add(lastkeyframelocation);
times.Add(lastkeyframetimestamp);
}
continue;
}
}
FlvParser.ScriptTag meta = _parser.MetaTag;
byte[] bhead = new byte[] {
0x46, 0x4c, 0x56, // FLV
0x01, // Version 1
0x05, // 0000 0101, 有音频有视频
0, 0, 0, 0x09, // Header size, 9
0, 0, 0, 0, // Previous Tag Size #0
};
int pos = 0;
byte[] buffer = new byte[63356];
buffer[pos++] = 0x12; // script
#region - 开始写 -
for (int i = 0; i < 10; i++)
{
buffer[pos++] = 0;
}
pos = WriteString(buffer, pos, "onMetaData", true);
buffer[pos++] = 0x08;
pos = PutInt(buffer, pos, 26, 4);
object o;
double d;
pos = WriteString(buffer, pos, "creator");
pos = WriteString(buffer, pos, "tsorgy.cnblogs.com", true);
pos = WriteString(buffer, pos, "metadatacreator");
pos = WriteString(buffer, pos, "Metadata creator - by Tsanie", true);
pos = WriteString(buffer, pos, "hasKeyframes");
pos = WriteByte(buffer, pos, 1);
pos = WriteString(buffer, pos, "hasVideo");
pos = WriteByte(buffer, pos, 1);
pos = WriteString(buffer, pos, "hasAudio");
pos = WriteByte(buffer, pos, 1);
pos = WriteString(buffer, pos, "hasMetadata");
pos = WriteByte(buffer, pos, 1);
pos = WriteString(buffer, pos, "canSeekToEnd");
pos = WriteByte(buffer, pos, 0);
pos = WriteString(buffer, pos, "duration");
pos = WriteDouble(buffer, pos, duration);
pos = WriteString(buffer, pos, "datasize");
pos = WriteDouble(buffer, pos, datasize);
pos = WriteString(buffer, pos, "videosize");
pos = WriteDouble(buffer, pos, videosize);
pos = WriteString(buffer, pos, "videocodecid");
pos = WriteDouble(buffer, pos, videocodec);
pos = WriteString(buffer, pos, "width");
d = 512.0;
if (meta.TryGet("width", out o))
{
d = (double)o;
}
pos = WriteDouble(buffer, pos, d);
pos = WriteString(buffer, pos, "height");
d = 384.0;
if (meta.TryGet("height", out o))
{
d = (double)o;
}
pos = WriteDouble(buffer, pos, d);
pos = WriteString(buffer, pos, "framerate");
d = framerate > 0 ? framerate : (framecount / duration);
pos = WriteDouble(buffer, pos, d);
pos = WriteString(buffer, pos, "videodatarate");
pos = WriteDouble(buffer, pos, videosize / 125.0 / duration);
pos = WriteString(buffer, pos, "audiosize");
pos = WriteDouble(buffer, pos, audiosize);
pos = WriteString(buffer, pos, "audiocodecid");
pos = WriteDouble(buffer, pos, audiocodec);
pos = WriteString(buffer, pos, "audiosamplerate");
d = 44100;
if (meta.TryGet("audiosamplerate", out o))
{
d = (double)o;
}
pos = WriteDouble(buffer, pos, d);
pos = WriteString(buffer, pos, "audiosamplesize");
d = 16;
if (meta.TryGet("audiosamplesize", out o))
{
d = (double)o;
}
pos = WriteDouble(buffer, pos, d);
pos = WriteString(buffer, pos, "stereo");
byte stereo = 1;
if (meta.TryGet("stereo", out o))
{
stereo = (byte)o;
}
pos = WriteByte(buffer, pos, stereo);
pos = WriteString(buffer, pos, "audiodatarate");
pos = WriteDouble(buffer, pos, audiosize / 125.0 / duration);
pos = WriteString(buffer, pos, "filesize");
int filesize_pos = pos;
pos += 9;
pos = WriteString(buffer, pos, "lasttimestamp");
pos = WriteDouble(buffer, pos, lasttimestamp);
pos = WriteString(buffer, pos, "lastkeyframetimestamp");
pos = WriteDouble(buffer, pos, lastkeyframetimestamp);
pos = WriteString(buffer, pos, "lastkeyframelocation");
pos = WriteDouble(buffer, pos, lastkeyframelocation);
#endregion
pos = WriteString(buffer, pos, "keyframes");
buffer[pos++] = 3; // object
pos = WriteString(buffer, pos, "filepositions");
int file_positions = pos;
pos = WriteArray(buffer, pos, filepositions);
pos = WriteString(buffer, pos, "times");
pos = WriteArray(buffer, pos, times);
buffer[pos++] = 0;
buffer[pos++] = 0;
buffer[pos++] = 9; // 结束符
// script tag 长度
PutInt(buffer, 1, pos - 11, 3); // script 帧的 datasize
pos = PutInt(buffer, pos, pos, 4);
WriteDouble(buffer, filesize_pos, datasize + pos + bhead.Length); // filesize
WriteArray(buffer, file_positions, filepositions, pos + bhead.Length + (reserve ? 27 : 0));
dest.Write(bhead, 0, bhead.Length);
dest.Write(buffer, 0, pos);
}
public void ExecuteTime(double rate, double time, string outputfilename)
{
if (_parser == null)
{
return;
}
double o_rate = _parser.Rate;
if (o_rate < rate)
{
// 不需要转换
return;
}
long filesize = _parser.Length;
if (rate < 0)
{
filesize += 27;
}
uint offset;
double duration;
if (time < 0)
{
// 计算傲娇时间
duration = filesize / 125.0 / rate; // * 8 / 1000 / rate
offset = (uint)(duration * 1000 - _parser.Duration);
//o_rate = rate;
}
else
{
duration = _parser.Duration / 1000.0 + time;
offset = (uint)(time * 1000);
//o_rate = filesize / 125.0 / duration;
}
string offstr = (offset / 1000.0).ToString("0.000");
//开始处理傲娇
Stream src = new FileStream(_filename, FileMode.Open);
string path = outputfilename;
Stream dest = new FileStream(path, FileMode.Create);
WriteHead(dest, filesize, duration, 2.0, 2.0, -1, 1.0, 0 - offset,
0, _parser.Tags.Count - 1, (rate < 0));
// 傲娇的话才插入新帧
if (rate < 0)
{
ushort width = 512, height = 384;
//try
//{
// string[] ss = toolComboFrame.Text.Split('x');
// if (ss.Length == 2)
// {
// width = ushort.Parse(ss[0]);
// height = ushort.Parse(ss[1]);
// }
//}
//catch { }
byte[] buffer = GetH263Frame(0, width, height);
dest.Write(buffer, 0, buffer.Length);
}
//WriteDataStream(src, parser.Tags[1].Offset - 11, dest);
bool flag = true;
for (int i = 1; i < _parser.Tags.Count; i++)
{
src.Seek(_parser.Tags[i].Offset - 11, SeekOrigin.Begin);
FlvParser.FlvTag tag = _parser.Tags[i];
byte[] bs = new byte[tag.DataSize < 4 ? 4 : tag.DataSize];
src.Read(bs, 0, 4);
dest.Write(bs, 0, 4);
// 时间戳
uint t = tag.TimeStamp;
if (flag)
{
FlvParser.VideoTag vtag = tag as FlvParser.VideoTag;
if (time < 0)
{
// 无傲娇进度条
if ((vtag != null) && (vtag.AVCPacketType == 1))
{
t += offset;
flag = false;
}
else
{
t = 0;
}
}
else
{
// 傲娇
if (vtag != null)
{
if (vtag.FrameType == "keyframe")
{
flag = false;
}
t = 0;
}
else
{
t += offset;
}
}
}
else
{
t += offset;
}
PutTime(bs, 0, t);
dest.Write(bs, 0, 4); // timestamp
// 继续的数据
src.Seek(4, SeekOrigin.Current);
src.Read(bs, 0, 3); // streamid
dest.Write(bs, 0, 3);
src.Read(bs, 0, tag.DataSize);
dest.Write(bs, 0, tag.DataSize);
// prev tag size
src.Read(bs, 0, 4);
dest.Write(bs, 0, 4);
}
src.Close();
src.Dispose();
dest.Flush();
dest.Close();
dest.Dispose();
}
