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Use -q:v FFmpeg option for Apple hardware acceleration

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This commit is contained in:
Valentine Briese 2023-10-11 18:54:47 -07:00
parent 610593a795
commit 7095e2b8b6
1 changed files with 45 additions and 20 deletions
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53
crunchy-cli-core/src/utils/ffmpeg.rs
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@ -263,6 +263,12 @@ impl FFmpegPreset {
match codec {
FFmpegCodec::H264 => {
let mut crf_quality = || match quality {
FFmpegQuality::Lossless => output.extend(["-crf", "18"]),
FFmpegQuality::Normal => (),
FFmpegQuality::Low => output.extend(["-crf", "35"]),
};
if let Some(hwaccel) = hwaccel_opt {
match hwaccel {
FFmpegHwAccel::Nvidia => {
@ -274,23 +280,37 @@ impl FFmpegPreset {
"-c:v",
"h264_cuvid",
]);
crf_quality();
output.extend(["-c:v", "h264_nvenc", "-c:a", "copy"])
}
FFmpegHwAccel::Apple => {
// Apple's Video Toolbox encoders ignore `-crf`,
// use `-q:v` instead. It's on a scale of 1-100,
// 100 being lossless. Just did some math
// ((-a/51+1)*99+1 where `a` is the old crf value)
// so these settings very likely need some more
// tweeking.
match quality {
FFmpegQuality::Lossless => output.extend(["-q:v", "65"]),
FFmpegQuality::Normal => (),
FFmpegQuality::Low => output.extend(["-q:v", "32"]),
}
output.extend(["-c:v", "h264_videotoolbox", "-c:a", "copy"])
}
}
} else {
crf_quality();
output.extend(["-c:v", "libx264", "-c:a", "copy"])
}
match quality {
FFmpegQuality::Lossless => output.extend(["-crf", "18"]),
FFmpegQuality::Normal => (),
FFmpegQuality::Low => output.extend(["-crf", "35"]),
}
}
FFmpegCodec::H265 => {
let mut crf_quality = || match quality {
FFmpegQuality::Lossless => output.extend(["-crf", "20"]),
FFmpegQuality::Normal => (),
FFmpegQuality::Low => output.extend(["-crf", "35"]),
};
if let Some(hwaccel) = hwaccel_opt {
match hwaccel {
FFmpegHwAccel::Nvidia => {
@ -302,6 +322,7 @@ impl FFmpegPreset {
"-c:v",
"h264_cuvid",
]);
crf_quality();
output.extend([
"-c:v",
"hevc_nvenc",
@ -311,24 +332,28 @@ impl FFmpegPreset {
"hvc1",
])
}
FFmpegHwAccel::Apple => output.extend([
FFmpegHwAccel::Apple => {
// See the comment that starts on line 287.
match quality {
FFmpegQuality::Lossless => output.extend(["-q:v", "61"]),
FFmpegQuality::Normal => (),
FFmpegQuality::Low => output.extend(["-q:v", "32"]),
}
output.extend([
"-c:v",
"hevc_videotoolbox",
"-c:a",
"copy",
"-tag:v",
"hvc1",
]),
])
}
}
} else {
crf_quality();
output.extend(["-c:v", "libx265", "-c:a", "copy", "-tag:v", "hvc1"])
}
match quality {
FFmpegQuality::Lossless => output.extend(["-crf", "20"]),
FFmpegQuality::Normal => (),
FFmpegQuality::Low => output.extend(["-crf", "35"]),
}
}
FFmpegCodec::Av1 => {
output.extend(["-c:v", "libsvtav1", "-c:a", "copy"]);