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.NET Media Handler Pro 5.0 - VB.NET sample codes

List of VB.NET sample codes below that can help you to use .NET Media Handler Pro in your VB.NET projects for video publishing, thumbs grabbing, extract audio, post watermark on video and perform more media related tasks.


Steps

Before using VB.NET sample code in your project make sure to

i: download working ffmpeg build, unzip and place ffmpeg folder with all files on root of your web application.

ii: copy mediahandlerpro.dll and paste it into /bin/ directory of your web application.

iii: create three directories /contents/original, /contents/output/, /contents/thumbs for storing source, output video and generated thumbs.

 

Sample code and project available with each product bundle.


VB.NET Sample Codes:

i: Set required parameters of .NET Media Handler Pro 5.0. This is required for any task related to video publishing / encoding, thumb grabbing, extract audio, post watermark etc.

Dim _mhandler As New MediaHandler()
Dim RootPath As String = Server.MapPath(Request.ApplicationPath)
// set ffmpeg path
_mhandler.FFMPEGPath = HttpContext.Current.Server.MapPath("~\ffmpeg\ffmpeg.exe")
// set source directory path<
_mhandler.InputPath = RootPath & "\contents\original"
// set output directory path
_mhandler.OutputPath = RootPath & "\contents\output"
// set source filename
_mhandler.FileName = "sample.mp4"
// set output filename<
_mhandler.OutputFileName = "sample.3gp"

ii: VB.NET code for posting watermark on video.

_mhandler.WaterMarkPath = RootPath & "\contents\watermark"
// set watermark image filename
_mhandler.WaterMarkImage = "watermark.gif"
// more detail about posting watermark, click here.

iii: VB.NET code for setting important parameter that can allow user to customize output video.

// set video bitrate, depend on output video format
_mhandler.Video_Bitrate = 500
// Recommended to set this parameter via _mhandler.Parameters property e.g _mhandler.Parameters = "b:v=500"
// set audio bitrate, depend on output video format
_mhandler.Audio_Bitrate = 64
// Recommended to set this parameter via _mhandler.Parameters property e.g _mhandler.Parameters = "b:a=64"
// set published video width. must be multiple of 2
_mhandler.Width = 320
// set published video height. must be multiple of 2
_mhandler.Height = 240
// for complete list of parameters, click here , note some parameters may or may not be used for every circumstances so use parameters when required.

iv: VB.NET code for encoding flash flv video using .NET Media Handler Pro 5.0

_mhandler.FileName = "sample.mp4"
// set output filename
_mhandler.OutputFileName = "sample.flv"
// start video procesing
VideoInfo info = _mhandler.Encode_FLV()
//or 
VideoInfo info =_mhandler.Process()

v: VB.NET code for encoding .3gp video using .NET Media Handler Pro 5.0

_mhandler.FileName = "sample.mp4"
// set output filename
_mhandler.OutputFileName = "sample.3gp"
// start video procesing
VideoInfo info = _mhandler.Encode_3GP()
//or 
VideoInfo info =_mhandler.Process()

vi: VB.NET code for encoding AVI video using .NET Media Handler Pro 5.0

_mhandler.FileName = "sample.mp4"
// set output filename
_mhandler.OutputFileName = "sample.avi"
// set video parameters according to pal-vcd
_mhandler.TargetFileType = "pal-vcd"
// start video procesing
VideoInfo info = _mhandler.Encode_AVI()
//or 
VideoInfo info =_mhandler.Process()

v: VB.NET code to generate video from list of images using .NET Media Handler Pro 5.0

// i: All thumbs must be in sequest and in .jpg format e.g a_001.jpg, a_002.jpg, a_003.jpg....
// ii: FileName property below must point actual name of thumb without .jpg and sequence e.g "a_" represent "a_001.jpg...."
_mhandler.FileName = "a_"
// set output video filename without any extension
_mhandler.OutputFileName = "a"
// set output extension<
_mhandler.OutputExtension = ".flv"
// start procesing
VideoInfo info = _mhandler.Encode_AVI()
//or 
VideoInfo info =_mhandler.ImagesToVideo()

vi: VB.NET code for grabbing single or multiple thumbs using .NET Media Handler Pro 5.0

//***************************************************
// Multiple Thumbs: Thumb Mod: Normal // Recommended for multiple thumbs as it support long length videos too
//***************************************************
// set thumb start index, e.g sample_ generate sample_001.jpg, sample_002.jpg etc
string thumb_start_index = "sample_"
// set source video filename
_mhandler.FileName = "sample.mp4"
// set output image format
_mhandler.Image_Format = "jpg"
// set image codec (optional)
_mhandler.VCodec = "image2"
// set image name, in multiple mode image index required
_mhandler.ImageName = thumb_start_index
// set to enable multiple thumb mode
_mhandler.Multiple_Thumbs = True
_mhandler.ThumbMode = 0
// set total no of thumb to be generating from video.
_mhandler.No_Of_Thumbs = 15
// set start positing / length of video from where thumb grabbing start
_mhandler.Thumb_Start_Position = 10
// set width and height of thumb, not it must be multiple of two.
_mhandler.Width = 160
_mhandler.Height = 120
// start grabbing thumbs
VideoInfo info = _mhandler.Grab_Thumb()
//******************************************************
// Single Thumb
//******************************************************
_mhandler.FileName = "sample.mp4"
// set output image name
_mhandler.ImageName = "sample.jpg"
// set length in seconds from where you want to grab thumb
 _mhandler.Frame_Time = "10"
//_mhandler.Thumb_Start_Position = 10
_mhandler.Image_Format = "jpg"
_mhandler.VCodec = "image2"
_mhandler.Width = 160
_mhandler.Height = 120 // start grabbing single thumb from video VideoInfo info = _mhandler.Grab_Thumb()

vi: VB.NET code for joining two or more video clips in one output using .NET Media Handler Pro 5.0

// set list of filenames to be joined with single output. not required that all clips in same format and size
_mhandler.FileNames = new string[] { "sample_01.mp4", "sample_02.mp4" }
// set output video name, without extension recommended.
_mhandler.OutputFileName = "sample_full"
// set output extension
_mhandler.OutputExtension = ".avi"
// set width and height of output video.  recommended to avoid any mismanagement in width and height of different video clips
_mhandler.Width = 320 
_mhandler.Height = 240
_mhandler.TargetFileType = "pal-vcd"
VideoInfo info = _mhandler.Join_Videos()

vi: VB.NET code for splitting video or audio in two or more clips using .NET Media Handler Pro 5.0

_mhandler.FileName = "sample.avi"
_mhandler.OutputFileName = "split_video"
_mhandler.OutputExtension = ".avi"
_mhandler.Width = 320
_mhandler.Height = 240
_mhandler.TargetFileType = "pal-vcd"
// set length in seconds of each clip
int length_of_video = 20
// set total no of clips to be generating
int total_clips = 10
VideoInfo info = _mhandler.Split_Video(length_of_video) // or VideoInfo info = _mhandler.Split_Video(length_of_video,total_clips)

vi: VB.NET code for retrieving information from media (video, audio, image) using .NET Media Handler Pro 5.0

// set media filename
_mhandler.FileName = "sample.mp4"
VideoInfo info = _mhandler.Get_Info()

vi: VB.NET code for error validation after processing completes

// start validation whether media processed properly or failed.
// info object store all information retreived from media after processing completes.
if (info.ErrorCode > 0 && info.ErrorCode != 121)
{
       Response.Write("Video processing failed, Error code " & info.ErrorCode & " generated")
       return
}
// if ErrorCode returned by function is greater than zero, means there is error occured. for detail about error codes click here
              

vi: VB.NET code for retrieving information from source and output media (video, audio, image) using .NET Media Handler Pro 5.0

// info object store all information retreived from media after processing completes.
// After errorcode validation you can retrieve source and output video information from info object as shown below.
Dim str as new StringBuilder()
str.Append("File Name= " & info.FileName & "<br />")
str.Append("Video Duration= " & info.Duration & "<br />")
str.Append("Video Duration in Seconds= " & info.Duration_Sec & "<br />")
// Retrieve information from source media
str.Append("Video Codec= " & info.Input_Vcodec & "<br />")
str.Append("Audio Codec= " & info.Input_Acodec & "<br />")
str.Append("Video Bitrate= " & info.Input_Video_Bitrate & "<br />")
str.Append("Audio Bitrate= " & info.Input_Audio_Bitrate & "<br />")
str.Append("Audio Sampling Rate= " & info.Input_SamplingRate & "<br />")
str.Append("Audio Channel= " & info.Input_Channel & "<br />")
str.Append("Width= " & info.Input_Width & "<br />")
str.Append("Height= " & info.Input_Height & "<br />")
str.Append("Video FrameRate= " & info.Input_FrameRate & "<br />")
// Retrieve information from output video
str.Append("Video Codec= " & info.Vcodec & "<br />")
str.Append("Audio Codec= " & info.Acodec & "<br />")
str.Append("Video Bitrate= " & info.Video_Bitrate & "<br />")
str.Append("Audio Bitrate= " & info.Audio_Bitrate & "<br />")
str.Append("Audio Sampling Rate= " & info.SamplingRate & "<br />")
str.Append("Audio Channel= " & info.Channel & "<br />")
str.Append("Width= " & info.Width & "<br />")
str.Append("Height= " & info.Height & "<br />")
str.Append("Video FrameRate= " & info.FrameRate & "<")
str.Append(".................................<br />")
str.Append("FFMPEG Output:" & info.FFMPEGOutput & "")
str.Append("Error Code= " & info.ErrorCode & "<br />")
// for more detail about videoinfo object visit video output parameter section.           

For more detail visit

Media Handler Pro 5.0 Documentation

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