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Add bandwidth flags to ffmpeg transcodes

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Zoe Roux 2023-04-29 19:21:59 +09:00
parent f76ce5dae1
commit ca4e9e0052
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1 changed files with 51 additions and 8 deletions
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59
transcoder/src/transcode.rs
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@ -53,16 +53,59 @@ fn get_transcode_video_quality_args(quality: &Quality) -> Vec<&'static str> {
"-map", "0:v:0", "-c:v", "libx264", "-crf", "21", "-preset", "veryfast",
];
// I'm not entierly sure about the values for bitrates. Double checking would be nice.
// Even less sure but bufsize are 5x the avergae bitrate since the average bitrate is only
// useful for hls segments.
match quality {
Quality::Original => vec![],
Quality::P240 => [enc_base, vec!["-vf", "scale=-2:'min(240,ih)'"]].concat(),
Quality::P360 => [enc_base, vec!["-vf", "scale=-2:'min(360,ih)'"]].concat(),
Quality::P480 => [enc_base, vec!["-vf", "scale=-2:'min(480,ih)'"]].concat(),
Quality::P720 => [enc_base, vec!["-vf", "scale=-2:'min(720,ih)'"]].concat(),
Quality::P1080 => [enc_base, vec!["-vf", "scale=-2:'min(1080,ih)'"]].concat(),
Quality::P1440 => [enc_base, vec!["-vf", "scale=-2:'min(1440,ih)'"]].concat(),
Quality::P4k => [enc_base, vec!["-vf", "scale=-2:'min(2160,ih)'"]].concat(),
Quality::P8k => [enc_base, vec!["-vf", "scale=-2:'min(4320,ih)'"]].concat(),
Quality::P240 => [
enc_base,
vec!["-vf", "scale=-2:'min(240,ih)'"],
vec!["-b:v", "400k", "-bufsize", "2000k", "-maxrate", "700k"],
]
.concat(),
Quality::P360 => [
enc_base,
vec!["-vf", "scale=-2:'min(360,ih)'"],
vec!["-b:v", "800k", "-bufsize", "4000k", "-maxrate", "1400"],
]
.concat(),
Quality::P480 => [
enc_base,
vec!["-vf", "scale=-2:'min(480,ih)'"],
vec!["-b:v", "1200k", "-bufsize", "6000k", "-maxrate", "2100k"],
]
.concat(),
Quality::P720 => [
enc_base,
vec!["-vf", "scale=-2:'min(720,ih)'"],
vec!["-b:v", "2400k", "-bufsize", "12000k", "-maxrate", "4000k"],
]
.concat(),
Quality::P1080 => [
enc_base,
vec!["-vf", "scale=-2:'min(1080,ih)'"],
vec!["-b:v", "4800k", "-bufsize", "24000k", "-maxrate", "6000k"],
]
.concat(),
Quality::P1440 => [
enc_base,
vec!["-vf", "scale=-2:'min(1440,ih)'"],
vec!["-b:v", "9600k", "-bufsize", "48000k", "-maxrate", "12000k"],
]
.concat(),
Quality::P4k => [
enc_base,
vec!["-vf", "scale=-2:'min(2160,ih)'"],
vec!["-b:v", "16000k", "-bufsize", "80000k", "-maxrate", "28000k"],
]
.concat(),
Quality::P8k => [
enc_base,
vec!["-vf", "scale=-2:'min(4320,ih)'"],
vec!["-b:v", "28000k", "-bufsize", "140000k", "-maxrate", "40000k"],
]
.concat(),
}
}