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Parse H264 Profile Level

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This commit is contained in:
Genteure 2019-01-09 14:59:24 +08:00
parent 6f723b0035
commit cc0dd4718c
1 changed files with 58 additions and 4 deletions
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62
BililiveRecorder.FlvProcessor/FlvTag.cs
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@ -1,21 +1,75 @@
using System;
using System.Diagnostics;
using System.IO;
namespace BililiveRecorder.FlvProcessor
{
public class FlvTag : IFlvTag
{
private int _IsVideoKeyframe = -1;
public TagType TagType { get; set; } = 0;
public int TagSize { get; set; } = 0;
public int TimeStamp { get; private set; } = 0;
public byte[] StreamId { get; set; } = new byte[3];
public bool IsVideoKeyframe => _IsVideoKeyframe != -1 ? _IsVideoKeyframe == 1 : 1 == (_IsVideoKeyframe = _ParseIsVideoKeyframe());
public byte[] Data { get; set; } = null;
public bool IsVideoKeyframe { get; private set; }// _IsVideoKeyframe != -1 ? _IsVideoKeyframe == 1 : 1 == (_IsVideoKeyframe = _ParseIsVideoKeyframe());
public int Profile { get; private set; } = -1;
public int Level { get; private set; } = -1;
public byte[] Data { get => _data; set { _data = value; ParseInfo(); } }
private byte[] _data = null;
public void SetTimeStamp(int timestamp) => TimeStamp = timestamp;
private void ParseInfo()
{
/**
* VIDEODATA:
* 0x17 (1 byte)
* 1 = AVC Keyframe
* 7 = AVC Codec
* AVCVIDEOPACKET:
* 0x00 (1 byte)
* 0 = AVC Header
* 1 = AVC NALU
* 0x00
* 0x00
* 0x00 (3 bytes)
* if(AVC_HEADER) then always 0
* AVCDecoderConfigurationRecord:
* 0x01 (1 byte)
* configurationVersion must be 1
* 0x00 (1 byte)
* AVCProfileIndication
* 0x00 (1 byte)
* profile_compatibility
* 0x00 (1 byte)
* AVCLevelIndication
* */
IsVideoKeyframe = false;
Profile = -1;
Level = -1;
if (TagType != TagType.VIDEO) { return; }
if (Data.Length < 9) { return; }
// Not AVC Keyframe
if (Data[0] != 0x17) { return; }
IsVideoKeyframe = true;
// Isn't AVCDecoderConfigurationRecord
if (Data[1] != 0x00) { return; }
// version is not 1
if (Data[5] != 0x01) { return; }
Profile = Data[6];
Level = Data[8];
#if DEBUG
Debug.WriteLine("Video Profile: " + Profile + ", Level: " + Level);
#endif
}
public byte[] ToBytes(bool useDataSize, int offset = 0)
{
var tag = new byte[11];