AsfMojo

Source code checked in, #16811

Project Collection Service Accounts — Mon, 01 Oct 2012 21:13:55 GMT

Upgrade: New Version of LabDefaultTemplate.xaml. To upgrade your build definitions, please visit the following link: http://go.microsoft.com/fwlink/?LinkId=254563

Source code checked in, #16810

Project Collection Service Accounts — Mon, 01 Oct 2012 21:12:48 GMT

Checked in by server upgrade

New Post: FPS

michael_knapp — Sat, 08 Sep 2012 14:53:33 GMT

Hi Chris - better late than never - you can get the FPS from the AsfExtendedStreamProperties object, below an example:

AsfFile asfFile = new AsfFile(testVideoFileName);
AsfExtendedStreamProperties asfExtendedStreamProperties = asfFile.GetAsfObject<AsfExtendedStreamProperties>();

if (asfExtendedStreamProperties.AvgTimePerFrame > 0)
{
    double frameRate = 1.0 / TimeSpan.FromTicks((long)asfExtendedStreamProperties.AvgTimePerFrame).TotalSeconds;
}

New Post: Updating ContentProperties

michael_knapp — Sat, 08 Sep 2012 14:42:59 GMT

gxdata - this class is used by the fluent interface. You can look at the interface IAsfFileUpdateOptions to see what properties you can update:

    public interface IAsfFileUpdateOptions
    {
        IAsfFileUpdateOptions WithFileCreationTime(DateTime fileCreationTime);
        IAsfFileUpdateOptions WithAuthor(string author);
        IAsfFileUpdateOptions WithDescription(string description);
        IAsfFileUpdateOptions WithTitle(string title);
        IAsfFileUpdateOptions WithRating(string rating);
        IAsfFileUpdateOptions WithCopyright(string copyright);
        void Update(string targetFileName = null);
    }

There's also an example on how to use this in the unit tests:

            AsfFile.From(testVideoFileName)
                   .WithFileCreationTime(DateTime.Parse("2/27/2011"))
                   .WithAuthor("Fred Fish")
                   .WithDescription("Some lengthy description of the content")
                   .WithCopyright("Copyright (c) 2011")
                   .WithTitle("Some title")
                   .WithRating("5.0")
                   .Update(testBackupFileName);

Hope this helps!

New Post: Updating ContentProperties

gxdata — Tue, 28 Aug 2012 16:56:40 GMT

I see that there is an internal class AsfFileUpdateOptions() - how do I update those few properties?

New Post: FPS

c_h_r_i_s — Sat, 10 Dec 2011 16:30:06 GMT

Hi,

Is there a way of getting the fps of a AsfFile?

Thanks.

Commented Issue: GetAveragePacketDuration() - DivideByZeroException [812]

michael_knapp — Mon, 24 Oct 2011 12:34:50 GMT

I cant post the source video, but its a WMV file -- 29 seconds long. I also have a problem with DirectShow on this wmv, but its structures are all good. Very odd.

System.DivideByZeroException: Attempted to divide by zero.
at AsfMojo.File.AsfFile.GetAveragePacketDuration()
at AsfMojo.File.AsfFile.GetFilePosition(Double searchOffset, AsfStreamType streamType, Boolean isStart)
at AsfMojo.File.AsfFile.SetOffsetRange(Double startOffset, Double endOffset, FilePosition& requestStartPosition, Fil
ePosition& requestEndPosition, AsfStreamType streamType)
at AsfMojo.Media.AsfStream.Init(AsfStreamType streamType, Double startOffset, Double endOffset)
at AsfMojo.Media.AsfStream..ctor(AsfStreamType streamType, String fileName, Double startOffset, Double endOffset)
at AsfMojo.Media.AsfStream..ctor(AsfStreamType streamType, String fileName, Double offset)
at AsfMojo.Media.AsfImage.FromFile(String fileName, Double offset)
Comments: ** Comment from web user: michael_knapp **

This could only happen if no packets have been successfully parsed in the file - do any of the other headers get populated at all? Any way you can make the sample file available for testing?

Created Issue: GetAveragePacketDuration() - DivideByZeroException [812]

TWhidden — Fri, 14 Oct 2011 18:26:43 GMT

Commented Issue: Every packet in AsfDataObject.Packets is holding exactly same data (_packet) [799]

yxhu — Tue, 30 Aug 2011 04:45:28 GMT

This was because when create a Packet list for AsfObject, the temporaraly variable "packetData" was not initialise every time when read packet from the file.
The result is the raw byte array (_packet) of every packet in the AsfDataObject is holding the last piece of the packet data of the asf file.

I guess, this was the reason you weren't able to create seek index for the Asf file, as AsfFileConfiguration.Packets was assigned to the value of AsjObject.Packets.
When creating the seek index, your code was reference to AsfFileConfiguration.Packets.

To solve this issue, simply move "byte[] packetData = new byte[config.AsfPacketSize];" into the inside of the while loop in the constructor of "AsfDataObject" class.
Comments: ** Comment from web user: yxhu **

sorry, i didn't read your code carefully. It has nothing to do with "creating seek index"
As I saw the following code snip in the constructor of AsfIndexObject:

AsfPacket packet = config.Packets[packetIdx];

Commented Issue: Every packet in AsfDataObject.Packets is holding exactly same data (_packet) [799]

michael_knapp — Tue, 30 Aug 2011 04:11:31 GMT

yxhu - confirmed this is a problem, thanks for pointing it out! Unfortunately the memory requirements for keeping the full packet data for all packets in memory is prohibitive, so I will have to think about another solution. This problem would only show when directly accessing the packet data in the AsfDataObject since all other data is retrieved/set immediately after reading in the packet. I am not sure what you are hinting at with the "create seek index" - can you elaborate?

Created Issue: Every packet in AsfDataObject.Packets is holding exactly same data (_packet) [799]

yxhu — Tue, 30 Aug 2011 02:31:24 GMT

Closed Issue: AsfImage.GetImage() Holding On To File Lock [619]

michael_knapp — Fri, 03 Jun 2011 02:19:51 GMT

When extracting a frame from an ASF video; AsfMojo appears to be holding on to a file reference preventing a file from being deleted until the process exits.

My Code:
using (var asfStream = new AsfStream(AsfStreamType.asfImage, FileName, timePoint.TotalSeconds))
using (var asfImage = new AsfImage(asfStream))
return asfImage.GetImage();

Lock Grabbed @ Line 95 of AsfImage:
syncReader.GetNextSample(0, out pSample, out cnsSampleTime, out cnsSampleDuration, out dwFlags, out dwOutputNum, out dwStreamNum);

In theory, should have been released @ Line 108 and/or 110 of AsfImage?
Marshal.FinalReleaseComObject(pSample);
Marshal.FinalReleaseComObject(syncReader);

However, cannot delete referenced video file until main process exists. Only file access to video via AsfMojo; my code never touches the file directly.

What else is required to release file lock?
Comments:

Implemented as part of AsfMojo 1.2

Updated Wiki: Home

michael_knapp — Tue, 31 May 2011 07:16:53 GMT

AsfMojo Overview

AsfMojo is an open source .NET ASF parsing library, providing support for parsing Windows Media Audio (WMA) and Windows Media Video (WMV) files. It offers classes to create streams from packet data within a media file, gather file statistics and extract audio segments or frame accurate still frames. The library parses ASF objects as per the ASF specification revision 01.20.05

AsfMojo comes with a WPF UI application and a command line utility application that both make use of the AsfMojo core library.

The AsfMojo WPF UI app is a full fledged ASF Parser (similar to Windows Media AsfView 9) offering a simple but powerful interface into the structure of ASF files down to the packet level. Still frames and audio for every payload can be previewed (based on presentation time). The UI makes use of NAudio to calculate and display the waveform of audio data.

The AsfMojo command line utility offers a few streamlined options to access the AsfMojo library, such as updating its content properties(Author, Description etc.), creating thumb images from an offset within a media file or extracting a WAVE file from a time range within a media file.

AsfMojo core library is also available as NuGet package - install via the packet manager Install-Package AsfMojo to test and try it out!

AsfMojo WPF UI parsing a media file and displaying the still frame for a payload

AsfMojo WPF UI showing media file properties

AsfMojo core library usage

At the center of the core library is the AsfStream a stream based wrapper for a ASF compliant stream covering a range of time within a media asset.

An AsfStream can be

Saved to disk to create a partial video segment(unindexed)
Used as the input for audio or still frame extraction

Additionally the core library provides classes for extracting still frames (AsfImage) and audio segments (AsfAudio). Interface changes in Release 1.2 are detailed on the Documentation page.

Creating a still frame from an offset

double offset = 31.2;
Bitmap bitmap = AsfImage.FromFile(videoFileName, offset);

Extracting an audio segment to disk

double startOffset = 5.0;
double endOffset = 12.3;
WaveMemoryStream waveMemoryStream = WaveMemoryStream.FromFile(videoFileName)
                                                    .From(startOffset)
                                                    .To(endOffset);


using (FileStream fs = new FileStream("audio.wav", FileMode.Create))
waveMemoryStream.WriteTo(fs);

Updated Release: AsfMojo 1.2 (May 30, 2011)

michael_knapp — Mon, 30 May 2011 22:29:26 GMT

AsfMojo library 1.2 bug fixes:
- fixed AsfPacket error correction data parsing
- fixed Dispose implementation in AsfFile so it wouldn't keep holding a file lock
- added appropriate using blocks in AsfAudio
- fixed AsfPacket error correction detection
- fixed Duration attribute calculation in Configuration class
- fixed end offset calculation for packet range using AsfDataObject, this would cause exceptions when trying to parse packets in positions not covered by the AsfDataObject.

AsfMojo library 1.2 feature additions:
- added ability to update content properties (Author, Title, Description, Copyright)
- provide simplified interface to create image / wave stream as well as a fluent alternative

AsfMojo Cmd 1.2 changes:
- simplified existing functionality using new fluent/static interface to create image, wave stream

AsfMojo Cmd 1.2 feature additions:
- added ability to update content properties (Author, Title, Description, Copyright)

AsfMojo UI 1.2 bug fixes:
- fixed display bug in TimeToDisplayConverter which did cut off hours
- fixed a bug in displaying preview images

AsfMojo UI 1.2 feature additions:
- added ability to update content properties (Author, Title, Description, Copyright, Rating)

Released: AsfMojo 1.2 (May 30, 2011)

Mon, 30 May 2011 22:29:26 GMT

Updated Wiki: Home

michael_knapp — Mon, 30 May 2011 21:21:15 GMT

AsfMojo Overview

AsfMojo comes with a WPF UI application and a command line utility application that both make use of the AsfMojo core library.

AsfMojo core library is also available as NuGet package - install via the packet manager Install-Package AsfMojo to test and try it out!

AsfMojo WPF UI parsing a media file and displaying the still frame for a payload

AsfMojo WPF UI showing media file properties

AsfMojo core library usage

At the center of the core library is the AsfStream a stream based wrapper for a ASF compliant stream covering a range of time within a media asset.

An AsfStream can be

Saved to disk to create a partial video segment(unindexed)
Used as the input for audio or still frame extraction

Additionally the core library provides classes for extracting still frames (AsfImage) and audio segments (AsfAudio). Interface changes in Release 1.2 are detailed on the Documentation page.

Creating a still frame from an offset

double offset = 31.2;
Bitmap bitmap = AsfImage.FromFile(videoFileName, 1.0);

Extracting an audio segment to disk

double startOffset = 5.0;
double endOffset = 12.3;
WaveMemoryStream waveMemoryStream = WaveMemoryStream.FromFile(videoFileName)
                                                    .From(startOffset)
                                                    .To(endOffset);


using (FileStream fs = new FileStream("audio.wav", FileMode.Create))
waveMemoryStream.WriteTo(fs);

Updated Wiki: Home

michael_knapp — Mon, 30 May 2011 21:19:51 GMT

AsfMojo Overview

AsfMojo comes with a WPF UI application and a command line utility application that both make use of the AsfMojo core library.

AsfMojo core library is also available as NuGet package - install via the packet manager Install-Package AsfMojo to test and try it out!

AsfMojo WPF UI parsing a media file and displaying the still frame for a payload

AsfMojo WPF UI showing media file properties

AsfMojo core library usage

At the center of the core library is the AsfStream a stream based wrapper for a ASF compliant stream covering a range of time within a media asset.

An AsfStream can be

Saved to disk to create a partial video segment(unindexed)
Used as the input for audio or still frame extraction

Additionally the core library provides classes for extracting still frames (AsfImage) and audio segments (AsfAudio). Interface changes in Release 1.2 are detailed on the Documentation page.

Creating a still frame from an offset

double offset = 31.2;
Bitmap bitmap = AsfImage.FromFile(videoFileName, 1.0);

Extracting an audio segment to disk

double startOffset = 5.0;
double endOffset = 12.3;
AsfAudio asfAudio = new AsfAudio(asfStream);
WaveMemoryStream waveMemoryStream = WaveMemoryStream.FromFile(videoFileName)
                                                    .From(startOffset)
                                                    .To(endOffset);


using (FileStream fs = new FileStream("audio.wav", FileMode.Create))
waveMemoryStream.WriteTo(fs);

Updated Wiki: Home

michael_knapp — Mon, 30 May 2011 21:19:24 GMT

AsfMojo Overview

AsfMojo comes with a WPF UI application and a command line utility application that both make use of the AsfMojo core library.

AsfMojo core library is also available as NuGet package - install via the packet manager Install-Package AsfMojo to test and try it out!

AsfMojo WPF UI parsing a media file and displaying the still frame for a payload

AsfMojo WPF UI showing media file properties

AsfMojo core library usage

At the center of the core library is the AsfStream a stream based wrapper for a ASF compliant stream covering a range of time within a media asset.

An AsfStream can be

Saved to disk to create a partial video segment(unindexed)
Used as the input for audio or still frame extraction

Additionally the core library provides classes for extracting still frames (AsfImage) and audio segments (AsfAudio). Interface changes in Release 1.2 are detailed on the Documentation page.

Creating a still frame from an offset

double offset = 31.2;
Bitmap bitmap = AsfImage.FromFile(videoFileName, 1.0);

Extracting an audio segment to disk

double startOffset = 5.0;
double endOffset = 12.3;
AsfAudio asfAudio = new AsfAudio(asfStream);
WaveMemoryStream waveMemoryStream = WaveMemoryStream.FromFile(videoFileName)
                                                    .From(startOffset)
                                                    .To(endOffset);


using (FileStream fs = new FileStream("audio.wav", FileMode.Create))
waveMemoryStream.WriteTo(fs);

Updated Wiki: Home

michael_knapp — Mon, 30 May 2011 21:17:03 GMT

AsfMojo Overview

AsfMojo comes with a WPF UI application and a command line utility application that both make use of the AsfMojo core library.

AsfMojo core library is also available as NuGet package - install via the packet manager Install-Package AsfMojo to test and try it out!

AsfMojo WPF UI parsing a media file and displaying the still frame for a payload

AsfMojo WPF UI showing media file properties

AsfMojo core library usage

At the center of the core library is the AsfStream a stream based wrapper for a ASF compliant stream covering a range of time within a media asset.

An AsfStream can be

Saved to disk to create a partial video segment(unindexed)
Used as the input for audio or still frame extraction

Additionally the core library provides classes for extracting still frames (AsfImage) and audio segments (AsfAudio). Interface changes in Release 1.2 are detailed on the Documentation page.

Creating a still frame from an offset

double offset = 31.2;
Bitmap bitmap = AsfImage.FromFile(videoFileName, 1.0);

Extracting an audio segment to disk

double startOffset = 5.0;
double endOffset = 12.3;
AsfAudio asfAudio = new AsfAudio(asfStream);
WaveMemoryStream waveMemoryStream = WaveMemoryStream.FromFile(videoFileName)
                                                    .From(startOffset)
                                                    .To(endOffset);


using (FileStream fs = new FileStream("audio.wav", FileMode.Create))
waveMemoryStream.WriteTo(fs);

Updated Release: AsfMojo 1.2 (May 30, 2011)

michael_knapp — Mon, 30 May 2011 21:08:17 GMT

AsfMojo library 1.2 bug fixes:
- fixed AsfPacket error correction data parsing
- fixed Dispose implementation in AsfFile so it wouldn't keep holding a file lock
- added appropriate using blocks in AsfAudio
- fixed AsfPacket error correction detection
- fixed Duration attribute calculation in Configuration class
- fixed end offset calculation for packet range using AsfDataObject, this would exceptions when trying to parse packets in positions not covered by the AsfDataObject.

AsfMojo library 1.2 feature additions:
- added ability to update content properties (Author, Title, Description, Copyright)
- provide simplified interface to create image / wave stream as well as a fluent alternative

AsfMojo Cmd 1.2 changes:
- simplified existing functionality using new fluent/static interface to create image, wave stream

AsfMojo Cmd 1.2 feature additions:
- added ability to update content properties (Author, Title, Description, Copyright)

AsfMojo UI 1.2 bug fixes:
- fixed display bug in TimeToDisplayConverter which did cut off hours
- fixed a bug in displaying preview images

AsfMojo UI 1.2 feature additions:
- added ability to update content properties (Author, Title, Description, Copyright, Rating)