Example CodeJoin two clips assigned to variables: clipOne = Trim(0, -1000) This doesn't affect any delay in the first clip. The audio in the second clip will simply be appended directly to the end of the audio in clip1 with no additional delay. This should only be used in cases when the clips are contiguous (ie one file is a continuation of the other) and there are different delays (incorrectly) applied to the second clip. UnAlignedSplice joins two or more clips without respecting audio delay. UnAlignedSplice UnAlignedSplice (clip1, clip2 ) Argument Example CodeJoin two clips assigned to variables: clipOne = Trim(0, -1000)ĪlignedSplice(clipOne, clipTwo) Select and join 2 clips from one source: AlignedSplice(Trim(0, -1000), Trim(1500, 3000) Join more than 2 clips: clipOne = Trim(0, -1000)ĪlignedSplice(clipOne, clipTwo, clipThree, clipFour) When To Use ItNearly every application for joining multiple clips together calls for AlignedSplice in order to maintain audio sync. There's also a shorthand method of using AlignedSplice that's covered at the bottom of this section. More than two clips can be spliced from a single instance of this filter. In other words, if the audio in the second clip starts 30milliseconds after the video, it will remain synchronized with the video after the splice as well. For MPEG-2 files you could also get frame numbers from DGIndex when creating a D2V project file.ĪlignedSplice AlignedSplice (clip1, clip2 ) ArgumentĪdditional (optional) clips after the secondĪlignedSplice joins two clips, keeping the audio in each clip in sync with its respective clip. You can use a program like VirtualDub to open the AVS file, or you can use a script editor with built in preview, or even automated Trim capability. Related SoftwareIn order to use Trim it's usually necessary to visually inspect your video. You'll need to splice them together later if you want to produce a single clip from clips created by multiple uses of Trim. You can remove commercials from video by selecting only the frames for a television show. Or Trim(0, -1000) Create multiple clips from the same source clip: clipOne = Trim(0, -1000)ĬlipTwo = Trim(1500, 3000) When To Use ItWhen you don't want all the frames from a clip you can use Trim to select the frames you want.
Example CodeCreate a clip with frames 500 - 10000: Trim(500, 1000) Create a clip with the first 1000 frames: Trim(0, 999) Since beginning frames don't usually have audio, the audio stream from a DVD or similar source is typically delayed well under a second, but enough to cause problems if not kept in sync. In most cases you won't want to change pad_audio from True because many commercial sources have audio that's shorter than the video. You can also use a negative number like -100 for last_frame to select the number of frames instead of the ending frame number. Since there are situations where the number of frames in a file is unknown by the script author, Trim allows you to use 0 for the last_frame argument to specify the last frame of the file. Trim creates a new clip containing the range of frames you enter. Pad audio to match any delay in the original Number of frames to include if Negative. Trim Trim (clip, int first_frame, int last_frame ) Argument If you're in a hurry you can skip to the end and skip the detailed explanations. An explanation of this, along with some examples, is at the end of this section. ShorthandSince these are such basic editing operations AviSynth includes some special notation that allows you to join clips with a minimal amount of text, and in an easier to read format. You can select multiple ranges of frames (to remove commercials for example) and join them together. For purposes of this guide you'll need to explicitly tell AviSynth what frames to keep. Although AviSynth can be used this way it's a little more complex so we'll be staying away from it for now. The first is to think in terms of what's being removed. There are two general approaches to cutting and joining. They both even have special interfaces for both cutting and joining clips from one or more sources. Another solution is to use a script editor that can either interface with VirtualDub or provide you with a preview of its own. When cutting or joining video you can use VirtualDub, or a similar tool to identify the frame ranges for clips. In addition to advanced video editing capabilities, AviSynth includes basic filters to cut and join clips.