Trim

From Avisynth

Trim(clip clip, int first_frame, int last_frame [, bool pad_audio])
Trim(clip clip, int first_frame, int -num_frames [, bool pad_audio])

Trim trims a video clip so that it includes only the frames first_frame up to last_frame (first_frame and last_frame are included). The audio is similarly trimmed so that it stays synchronized. Remember AviSynth starts counting at frame 0.

pad_audio (default true) causes the audio stream to be padded to align with the video stream. Otherwise the tail of a short audio stream is left so. When last_frame=0 and pad_audio=false the end of the two streams remains independant.

Trim(100,0)               # delete the first 100 frames, audio padded
                          # or trimmed to match the video length.
Trim(100,0,false)         # delete the first 100 frames of audio and video,
                          # the resulting stream lengths remain independant.
Trim(100,-100)            # is the same as trim(100,199)
Trim(100,199,false)       # audio will be trimmed if longer but not
                          # padded if shorter to frame 199
Trim(0,-1)                # returns only the first frame
Trim(0,100)+Trim(200,300) # returns frames 0 to 100 and 200 to 300 (i.e. removing 101 to 199)

Changes:

v2.56

Added pad audio.