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FFmpeg Command: Convert Avi To Mp4

An engineer would use this ffmpeg command when needing to convert an AVI video file to the MP4 format while ensuring both audio is encoded with AAC at 128 kbps and video is encoded with H.264 at a constant quality rate. Exact CLI syntax to convert avi to mp4 using FFmpeg.

When to use this: An engineer would use this ffmpeg command when needing to convert an AVI video file to the MP4 format while ensuring both audio is encoded with AAC at 128 kbps and video is encoded with H.264 at a constant quality rate.

Command Syntax

ffmpeg -i <path/to/input_video>.avi -c:a aac -b:a 128k -c:v libx264 -crf 23 <path/to/output_video>.mp4

Command Breakdown

-i
Input
Sets the input file or stream for FFmpeg to read.
-c:a
Audio Codec
Selects the codec used for the audio stream.
-b:a
Audio Bitrate
Sets the target bitrate for the audio stream.
-c:v
Video Codec
Selects the codec used for the video stream.
-crf
Constant Rate Factor
Controls visual quality; lower values are higher quality and larger files.

FAQ

Purpose: Exact syntax to convert avi to mp4 using FFmpeg.

Test path: Replace placeholders and run destructive commands in a disposable workspace first.

Flag behavior: Tool version, platform, and shell can change behavior.

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