ffmpeg Helper Script (Fade In or Out, Clip Trimming, Frame Rate Adjustments, Playback Rate)

ffmpeg-helpers.sh

#!/bin/bash

# Adjust Frame Rate
#
#         Input File      | Video Filter  |  Output File
ffmpeg -i "video-001.mov"   -vf "fps=12"     "video-001.mp4"
#                                ^ Lower framerate for smaller file


# Trim From Start and End Times
#
#         Input File      | Starting Timecode   | Output Length     | Output File
ffmpeg -i "video-002.mov"   -ss 00:00:00          -t 00:02:53         "video-002.mp4"
#                               ^ Start at 0 sec     ^ Output 2 min 53 sec after start point

# Fade In
#
#         Input File      | Video Filter               | Output File
ffmpeg -i "video-003.mov"   -vf "fade=t=in:st=0:d=1"     "video-003.mp4"
#                                       ^ Fade In from 0 sec for duration of 1 sec


# Fade Out
#
#         Input File      | Video Filter               |  Output File
ffmpeg -i "video-004.mov"   -vf "fade=t=in:st=10:d=1"     "video-004.mp4"
#                                       ^ Fade Out from 10 sec for duration of 1 sec


# Fade In and Fade Out
#
#         Input File      | Video Filter                                     | Output File
ffmpeg -i "video-005.mov"   -vf "fade=t=in:st=10:d=1,fade=t=out:st=74:d=1"     "video-005.mp4"
#                                       ^ Fade In from 0 sec for 1 sec, Fade Out from 74 sec for 1 sec


# Combined: Trim Start and End, Fade In and Out, and Change Framerate
#
# Trim beginning at 10 sec
# Output 1 min 5 sec from start point
# Fade In for 1 sec at 10 sec start point
# Fade Out for 1 sec at end (start + output time = 75 - 1 for fade = 74 sec start for 1 sec fade)
# Convert to 12 frames per second (fps) for smaller filesize
# Convert from MOV to MP4 with defaults, for better compression
ffmpeg -i "video-006.mov" -ss 00:00:10 -t 00:01:05 -vf "fps=12,fade=t=in:st=10:d=1,fade=out:st=74:d=1" "video-006.mp4"

# Boost Playback Rate of Video and Audio
#
#         Input File   | Video Filter - 1.3x rate (1/1.3)  | Audio Filter - 1.3x rate   | Output File
ffmpeg -i "1.mov"    -vf "setpts=0.7692307692*PTS"       -af "atempo=1.3"                 "2.mp4"