AutoHotkey Language: Extracting Video Audio Encoding Data in Bulk
Introduction
AutoHotkey (AHK) is a scripting language for automating the Windows GUI and general scripting. It is often used for creating macros, automating repetitive tasks, and even automating video and audio processing. In this article, we will explore how to use AutoHotkey to create a script that can extract video audio encoding data in bulk. This can be particularly useful for content creators, researchers, or anyone who needs to analyze the audio encoding of multiple video files.
Prerequisites
Before we dive into the code, ensure you have the following prerequisites:
1. AutoHotkey installed on your system.
2. Access to the video files you want to analyze.
3. Basic knowledge of AutoHotkey syntax and functions.
The Script
The script we will create will perform the following tasks:
1. Loop through a specified directory containing video files.
2. Extract the audio encoding data from each video file.
3. Store the extracted data in a CSV file for further analysis.
Step 1: Set Up the Script
Create a new AHK file and save it with a `.ahk` extension, for example, `extract_audio_encoding.ahk`.
ahk
NoEnv
SingleInstance, Force
SetWorkingDir, %A_ScriptDir%
; Define the directory containing the video files
video_directory := "C:pathtovideofiles"
; Define the output CSV file
output_csv := "C:pathtooutputaudio_encoding_data.csv"
; Define the video file extension(s)
video_extensions := "mp4,avi,wmv"
; Initialize the CSV file with headers
FileAppend, Video File, %output_csv%
FileAppend, , %output_csv%
FileAppend, Format, %output_csv%
FileAppend, Bitrate, %output_csv%
FileAppend, Sample Rate, %output_csv%
FileAppend, Channels, %output_csv%
FileAppend, Duration, %output_csv%
FileAppend, , %output_csv%
Step 2: Loop Through Video Files
We will use a loop to iterate through all the video files in the specified directory.
ahk
Loop, Files, %video_directory%%video_extensions%, 2
{
; Extract the file name without extension
video_file := A_LoopFileName
video_path := A_LoopFileLongPath
; Extract the audio encoding data
audio_data := GetAudioEncodingData(video_path)
; Check if the data was successfully extracted
If (audio_data)
{
; Append the data to the CSV file
FileAppend, %video_file%, %output_csv%
FileAppend, %audio_data.format%, %output_csv%
FileAppend, %audio_data.bitrate%, %output_csv%
FileAppend, %audio_data.sample_rate%, %output_csv%
FileAppend, %audio_data.channels%, %output_csv%
FileAppend, %audio_data.duration%, %output_csv%
FileAppend, , %output_csv%
}
}
Step 3: Extract Audio Encoding Data
The `GetAudioEncodingData` function will use the `ffmpeg` command-line tool to extract the audio encoding data from the video file. Make sure you have `ffmpeg` installed on your system and its executable is in your system's PATH.
ahk
GetAudioEncodingData(video_path)
{
cmd := "ffmpeg -i """ . video_path . """ 2>&1"
Process, Run, %cmd%, , Hide
Process, WaitClose, ffmpeg.exe, 10
output := ErrorLevel
; Parse the output for audio encoding data
RegExMatch(output, "i)(Format:)(.?)(Bitrate:)(.?)(Sample Rate:)(.?)(Channels:)(.?)(Duration:)(.?)(d{2}:d{2}:d{2})", match)
If (match)
{
return {
format: match2,
bitrate: match4,
sample_rate: match6,
channels: match8,
duration: match10
}
}
return false
}
Step 4: Run the Script
Save the script and run it. The script will process all the video files in the specified directory and extract the audio encoding data, which will be stored in the output CSV file.
Conclusion
In this article, we have explored how to use AutoHotkey to create a script that can extract video audio encoding data in bulk. By leveraging the `ffmpeg` command-line tool and AutoHotkey's file and process handling capabilities, we were able to create a script that can process multiple video files and generate a CSV file containing the audio encoding data for further analysis.
This script can be further customized to include additional features, such as handling different video formats, filtering specific video files, or even automating the script to run at regular intervals. With a bit of creativity and additional scripting, the possibilities are endless.
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