Splitting / Appending - Revision history

Ballofsnow: /* Initial setup */ ffdshow vfw -> video decoder config

2008-01-12T15:50:09Z

‎Initial setup: ffdshow vfw -> video decoder config

Ballofsnow: /* Initial setup */

2007-07-20T05:21:22Z

‎Initial setup

Ballofsnow: /* Introduction */

2007-06-09T19:42:21Z

‎Introduction

Ballofsnow at 19:36, 9 June 2007

2007-06-09T19:36:47Z

Ballofsnow at 19:32, 9 June 2007

2007-06-09T19:32:03Z

Ballofsnow: /* Appending */

2007-06-06T19:22:30Z

‎Appending

Ballofsnow: /* Appending */ Aliens infected us, it's about time we infected them.

2007-06-06T19:17:05Z

‎Appending: Aliens infected us, it's about time we infected them.

Ballofsnow: Split with YAMB

2007-06-02T20:36:31Z

Split with YAMB

Ballofsnow: Splitting with vdub done.

2007-06-02T19:27:40Z

Splitting with vdub done.

Ballofsnow: Just started.

2007-06-02T18:30:38Z

Just started.

New page

==Introduction==

The goal of this guide is to show ways to split or append videos without having to re-encode. There are inherent drawbacks which will be explained, as well as solutions to get around them.

<br>
==Tools==

*[http://www.videohelp.com/tools/VirtualdubMOD VirtualDubMod]
*[http://yamb.unite-video.com/ YAMB]
*[http://sourceforge.net/project/showfiles.php?group_id=57023 AviSynth]

<br>
==Splitting==

The act of taking a video and creating smaller, separate videos.

<br>
===With VirtualDubMod===

@@ Line 16: / Line 16: @@
 ==Initial setup==
-If you plan on importing H.264/AAC video into VirtualDub(Mod) you'll need to install Avisynth and FFDShow. When installing FFDShow you can just use the default installation settings. Once installed, go to Start -> Programs -> FFDShow -> VFW configuration. In the decoder tab click on the codecs section; it's probably already selected. Look to the right for H.264 and set it from disabled to libavcodec.
+If you plan on importing H.264/AAC video into VirtualDub(Mod) you'll need to install Avisynth and [http://www.free-codecs.com/FFDShow_download.htm FFDShow]. When installing FFDShow you can just use the default installation settings. Once installed, go to Start -> Programs -> FFDShow -> Video Decoder Configuration. In the decoder tab click on the codecs section; it's probably already selected. Look to the right for H.264 and set it from disabled to libavcodec.
-[[Image:ffdshowvfw.png]]
+[[Image:ffdshowH264.png]]
 <br>

@@ Line 16: / Line 16: @@
 ==Initial setup==
-If you plan on importing H.264/AAC video into VirtualDub(Mod) you'll need to install Avisynth and FFDShow. When installing FFDShow you can just use the default installation settings. Once installed, go to Stat -> Programs -> FFDShow -> VFW configuration. In the decoder tab click on the codecs section; it's probably already selected. Look to the right for H.264 and set it from disabled to libavcodec.
+If you plan on importing H.264/AAC video into VirtualDub(Mod) you'll need to install Avisynth and FFDShow. When installing FFDShow you can just use the default installation settings. Once installed, go to Start -> Programs -> FFDShow -> VFW configuration. In the decoder tab click on the codecs section; it's probably already selected. Look to the right for H.264 and set it from disabled to libavcodec.
 [[Image:ffdshowvfw.png]]
 <br>
 ==Splitting==

@@ Line 1: / Line 1: @@
 ==Introduction==
-The goal of this guide is to show ways to split or append videos without having to re-encode. There are inherent drawbacks which will be explained, as well as solutions to get around <i>most</i> of them.
+The goal of this guide is to show ways to split or append videos without having to re-encode the video. There are inherent drawbacks which will be explained, as well as solutions to get around <i>most</i> of them.
 <br>
 ==Tools==

@@ Line 105: / Line 105: @@
 * File -> Append Segment until you have everything you want.
 * Streams -> Stream List.
-* The audio stream you see is an unaligned splice. Click the disable button!
+* The audio stream you see is an unaligned splice. Disable it!
-* Click the add button and find the audio file that you already encoded. Click ok.
+* Add the audio file that you already encoded. Click ok.
 * Video -> Direct Stream Copy.
 * File -> Save As.
@@ Line 117: / Line 117: @@
 * Click Output to set the file name.
 * Click join.
 * Go to the Extract tab.
 * Load the appended file.
 * Click on the Extract Track by id to new MP4 file. Track 1 should be the video. You can verify by looking at the informations window.
 * Click extract. This will get rid of the unaligned audio.
 * Go to the Mux tab.
 * Add the extracted video.
 * Add the aligned audio that you've already encoded to AAC.
 * Mux it!

@@ Line 6: / Line 6: @@
 ==Tools==
-*[http://www.videohelp.com/tools/VirtualdubMOD VirtualDubMod] - for avi files.
+* [http://www.videohelp.com/tools/VirtualdubMOD VirtualDubMod] - for avi files.
-*[http://yamb.unite-video.com/ YAMB] - for mp4 files.
+* [http://yamb.unite-video.com/ YAMB] - for mp4 files.
-*[http://sourceforge.net/project/showfiles.php?group_id=57023 AviSynth]
+* [http://sourceforge.net/project/showfiles.php?group_id=57023 AviSynth]
-*Codec
+* Codec
-*FFDShow
+* [http://www.free-codecs.com/FFDShow_download.htm FFDShow]
 <br>
@@ Line 59: / Line 66: @@
 <blockquote>
 One of the best features of AviSynth is its ability to do an aligned splice when appending video. There is usually a mismatch between the length of the video and the length of the audio, typically ranging from -50 ms to +50 ms. <b>This means that appending files in VirtualDub(Mod) will in almost all cases cause a desync</b> because the audio of clip2 will be appended right after clip1. VirtualDub(Mod) is unable to do an aligned splice. Here is an illustration:
 [[Image:append.png]]
@@ Line 72: / Line 80: @@
 I'm not going to go into the AviSynth syntax since you can learn all of that by reading the AviSynth guide. What you need to learn is how to import the video files, and how to append. So, the basic idea is that we will use AviSynth's alignedsplice() command to get the correct audio stream and reinsert it into the appended video. Follow these steps:
-<font color="red">Editor's note: Include guide to enabling VFW H.264 decoding in FFDShow.</font>
+*Create the AviSynth script, making sure to use AlignedSplice when appending. Example:
-*Get any video codecs you may need, including FFDShow if you want to import mp4 files.
+<pre><nowiki>
-*Create the AviSynth script, making sure to use AlignedSplice when appending.
+a = directshowsource("level1.mp4")
-*Import the script into VirtualDubMod.
+b = directshowsource("level2.mp4")
-*Go to Streams -> Streams List.
+c = directshowsource("level3.mp4")
-*Right click the audio stream and set it to full processing.
+AlignedSplice(a,b,c)
-*Click on Save Wav button.
+</nowiki></pre>
 *Close VirtualDubMod.
-*Compress the wav file to mp3 or aac with MeGUI, or an audio encoder of your choice.
+* Import the script into VirtualDubMod.
 Now that that's done, you can forget about using anymore AviSynth. Follow the VirtualDubMod section if you're joining avi files, or the YAMB section if you're joining mp4 files.
--under construction-
+* Go to the Mux tab.

← Older revision		Revision as of 19:22, 6 June 2007
Line 83:		Line 83:
	*Compress the wav file to mp3 or aac with MeGUI, or an audio encoder of your choice.		*Compress the wav file to mp3 or aac with MeGUI, or an audio encoder of your choice.

−	~~Now, follow the VirtualDubMod section if you're joining avi files, or the YAMB section if you're joining mp4 files.~~

		+	Now that that's done, you can forget about using anymore AviSynth. Follow the VirtualDubMod section if you're joining avi files, or the YAMB section if you're joining mp4 files.

−	under construction	+
		+	-under construction-

← Older revision		Revision as of 19:17, 6 June 2007
Line 54:		Line 54:

	The act of joining multiple videos together to create one video.		The act of joining multiple videos together to create one video.
		+
		+	I'll start by explaining the <font color="red">the drawback</font> because it applies to both VirtualDub(Mod) and YAMB. First you should read Part 4 of the AviSynth guide which is quoted here:
		+
		+	<blockquote>
		+	One of the best features of AviSynth is its ability to do an aligned splice when appending video. There is usually a mismatch between the length of the video and the length of the audio, typically ranging from -50 ms to +50 ms. <b>This means that appending files in VirtualDub(Mod) will in almost all cases cause a desync</b> because the audio of clip2 will be appended right after clip1. VirtualDub(Mod) is unable to do an aligned splice. Here is an illustration:
		+
		+	[[Image:append.png]]
		+	</blockquote>
		+
		+	If you still don't understand, I'll explain again but with a larger mismatch. Let's say you have two videos, each 10 seconds long, and the first video has audio that only lasts 5 seconds. By appending directly in VirtualDubMod or YAMB, you will start hearing the audio of clip 2 halfway during clip 1. If you were to look at the file details of this appended video, you'd see that the video duration is 20 seconds, while the audio duration is only 15 seconds. That's not good.
		+
		+	<br>
		+	<font size="4" color="green">A solution: AviSynth!</font>
		+
		+	Of course, even this "solution" has its own drawback, you'll have to re-compress the audio. However, for most people this is acceptable.
		+
		+	I'm not going to go into the AviSynth syntax since you can learn all of that by reading the AviSynth guide. What you need to learn is how to import the video files, and how to append. So, the basic idea is that we will use AviSynth's alignedsplice() command to get the correct audio stream and reinsert it into the appended video. Follow these steps:
		+
		+	<font color="red">Editor's note: Include guide to enabling VFW H.264 decoding in FFDShow.</font>
		+
		+	*Get any video codecs you may need, including FFDShow if you want to import mp4 files.
		+	*Create the AviSynth script, making sure to use AlignedSplice when appending.
		+	*Import the script into VirtualDubMod.
		+	*Go to Streams -> Streams List.
		+	*Right click the audio stream and set it to full processing.
		+	*Click on Save Wav button.
		+	*Close VirtualDubMod.
		+	*Compress the wav file to mp3 or aac with MeGUI, or an audio encoder of your choice.
		+
		+	Now, follow the VirtualDubMod section if you're joining avi files, or the YAMB section if you're joining mp4 files.
		+
		+
		+	under construction

← Older revision		Revision as of 20:36, 2 June 2007
Line 35:		Line 35:

	<font color="green"><b>Tip:</b> You can navigate through keyframe placements by pressing the button with an arrow and a yellow key under it.</font>		<font color="green"><b>Tip:</b> You can navigate through keyframe placements by pressing the button with an arrow and a yellow key under it.</font>
		+
		+	<br>
		+	===With YAMB 1.6===
		+
		+	YAMB 1.6 is limited in that you can't see the video, so you have to pick out where you want to make your cuts beforehand. It also only accepts input in time format, not by frames. You have the option of splitting by duration, by range and by size.
		+
		+	Splitting is simple enough:
		+	* Click the Splitting & Joining tab
		+	* Load your video.
		+	* Input the values.
		+	* Split it!
		+
		+	<br>
		+	<font color="red"><b>The drawback:</b></font> Same as with VirtualDub(Mod), unfortunately.
		+
		+	<br>
		+	==Appending==
		+
		+	The act of joining multiple videos together to create one video.