PowerShellとわかりあえなかったffmpegクロスフェード編集

gen_movie.ps1

$movies = @(
    @{FileName=".\2023-01-27 15-29-36.mkv";FadeInTime=0;From=0;Time=5},
    @{FileName=".\2023-01-27 15-29-36.mkv";FadeInTime=1;From=63;Time=29},
    @{FileName=".\2023-01-27 15-32-51.mkv";FadeInTime=1;From=0;Time=3},
    @{FileName=".\2023-01-27 15-32-51.mkv";FadeInTime=1;From=55;Time=29},
    @{FileName=".\2023-01-27 15-40-44.mkv";FadeInTime=1;From=13;Time=10}
)

$filter_complex_v = ""
$filter_complex_a = ""
$offset_v_sum = 0

# Create filter_complex
for ($i = 1; $i -lt ($movies.Count); $i++) {
    #Write-Debug $i
    if ($i -eq 1) {
        $offset_v_sum = $movies[$i-1].Time - $movies[$i].FadeInTime
        # Write-Host ('[{0}:v][{1}:v]xfade=transition=fade:duration={2}[fv{0}]' -f $i, ($i+1), ($movies[$i + 1].FadeInTime))
        $now_filter_v = ('[{0}:v][{1}:v]xfade=transition=fade:offset={2}:duration={3}[fv{1}]' -f ($i-1), $i, $offset_v_sum, ($movies[$i].FadeInTime))
        $filter_complex_v = $filter_complex_v + $now_filter_v
        $now_filter_a = ('[{0}:a][{1}:a]acrossfade=d={2}[fa{1}]' -f ($i-1), ($i), ($movies[$i].FadeInTime))
        $filter_complex_a = $filter_complex_a + $now_filter_a
    } else {
        $offset_v_sum = $offset_v_sum + $movies[$i-1].Time - ($movies[$i].FadeInTime)
        $now_filter_v = ('[fv{0}][{1}:v]xfade=transition=fade:offset={2}:duration={3}[fv{1}]' -f ($i-1), $i, $offset_v_sum, ($movies[$i].FadeInTime))
        $filter_complex_v = $filter_complex_v + ";" + $now_filter_v
        $now_filter_a = ('[fa{0}][{1}:a]acrossfade=d={2}[fa{1}]' -f ($i-1), $i, ($movies[$i].FadeInTime))
        $filter_complex_a = $filter_complex_a + ";" + $now_filter_a
    }
}
Write-Host "f-v" $filter_complex_v
Write-Host "f-a" $filter_complex_a
$filter_complex = $filter_complex_v + ";" + $filter_complex_a
Write-Debug $filter_complex

$AllArgs = @()
for ($i = 0; $i -lt $movies.Count; $i++) {
    <# Action that will repeat until the condition is met #>
    $AllArgs += '-ss'
    $AllArgs += $movies[$i].From
    $AllArgs += '-t'
    $AllArgs += $movies[$i].Time
    $AllArgs += '-i'
    $AllArgs += $movies[$i].FileName
}

$AllArgs += '-filter_complex'
$AllArgs += ('{0}' -f $filter_complex)

$AllArgs += '-map'
$AllArgs += ('[fv{0}]' -f ($movies.Count - 1))
$AllArgs += '-map'
$AllArgs += ('[fa{0}]' -f ($movies.Count - 1))

$AllArgs += '-c:v'
$AllArgs += 'h264_nvenc'
$AllArgs += '-b:v'
$AllArgs += '10M'

$AllArgs += '-shortest'
$AllArgs += 'twitter.mp4'

& 'ffmpeg' $AllArgs