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rescale case

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This commit is contained in:
Manav Rathi
2025-04-29 10:55:51 +05:30
parent acede69f5b
commit f9e25ed14d
1 changed files with 21 additions and 16 deletions
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37
desktop/src/main/services/ffmpeg.ts
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@@ -228,15 +228,15 @@ export const ffmpegGenerateHLSPlaylistAndSegments = async (
}
}
// If the video is already H.264 / BT.709, and has a bitrate less than 4000
// kbps, then we do not need to reencode the video stream (by _far_ the
// costliest part of the HLS stream generation).
const reencodeVideo = !(
isH264 &&
isBT709 &&
bitrate &&
bitrate <= 4000 * 1000
);
// If the video is already H.264 with a bitrate less than 4000 kbps, then we
// do not need to reencode the video stream (by _far_ the costliest part of
// the HLS stream generation).
const reencodeVideo = !(isH264 && bitrate && bitrate <= 4000 * 1000);
// If the bitrate is not too high, then we don't need to rescale the video
// when generating the video stream. This is not a performance optimization,
// but more for avoiding making the video size smaller unnecessarily.
const rescaleVideo = !(bitrate && bitrate <= 2000 * 1000);
// We want the generated playlist to refer to the chunks as "output.ts".
//
@@ -299,13 +299,18 @@ export const ffmpegGenerateHLSPlaylistAndSegments = async (
// `filter1=key=value:key=value.filter2=key=value`.
"-vf",
[
// Scales the video to maximum 720p height, keeping aspect
// ratio and the calculated dimension divisible by 2 (some
// of the other operations require an even pixel count).
"scale=-2:720",
// Convert the video to a constant 30 fps, duplicating or
// dropping frames as necessary.
"fps=30",
rescaleVideo
? [
// Scales the video to maximum 720p height,
// keeping aspect ratio and the calculated
// dimension divisible by 2 (some of the other
// operations require an even pixel count).
"scale=-2:720",
// Convert the video to a constant 30 fps,
// duplicating or dropping frames as necessary.
"fps=30",
]
: [],
// Convert the colorspace if the video is not in the HD
// color space (bt709). Before conversion, tone map colors
// so that they work the same across the change in the