diff options
Diffstat (limited to 'shared/core-utils/videos/bitrate.ts')
| -rw-r--r-- | shared/core-utils/videos/bitrate.ts | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/shared/core-utils/videos/bitrate.ts b/shared/core-utils/videos/bitrate.ts deleted file mode 100644 index 6be027826..000000000 --- a/shared/core-utils/videos/bitrate.ts +++ /dev/null | |||
| @@ -1,113 +0,0 @@ | |||
| 1 | import { VideoResolution } from '@shared/models' | ||
| 2 | |||
| 3 | type BitPerPixel = { [ id in VideoResolution ]: number } | ||
| 4 | |||
| 5 | // https://bitmovin.com/video-bitrate-streaming-hls-dash/ | ||
| 6 | |||
| 7 | const minLimitBitPerPixel: BitPerPixel = { | ||
| 8 | [VideoResolution.H_NOVIDEO]: 0, | ||
| 9 | [VideoResolution.H_144P]: 0.02, | ||
| 10 | [VideoResolution.H_240P]: 0.02, | ||
| 11 | [VideoResolution.H_360P]: 0.02, | ||
| 12 | [VideoResolution.H_480P]: 0.02, | ||
| 13 | [VideoResolution.H_720P]: 0.02, | ||
| 14 | [VideoResolution.H_1080P]: 0.02, | ||
| 15 | [VideoResolution.H_1440P]: 0.02, | ||
| 16 | [VideoResolution.H_4K]: 0.02 | ||
| 17 | } | ||
| 18 | |||
| 19 | const averageBitPerPixel: BitPerPixel = { | ||
| 20 | [VideoResolution.H_NOVIDEO]: 0, | ||
| 21 | [VideoResolution.H_144P]: 0.19, | ||
| 22 | [VideoResolution.H_240P]: 0.17, | ||
| 23 | [VideoResolution.H_360P]: 0.15, | ||
| 24 | [VideoResolution.H_480P]: 0.12, | ||
| 25 | [VideoResolution.H_720P]: 0.11, | ||
| 26 | [VideoResolution.H_1080P]: 0.10, | ||
| 27 | [VideoResolution.H_1440P]: 0.09, | ||
| 28 | [VideoResolution.H_4K]: 0.08 | ||
| 29 | } | ||
| 30 | |||
| 31 | const maxBitPerPixel: BitPerPixel = { | ||
| 32 | [VideoResolution.H_NOVIDEO]: 0, | ||
| 33 | [VideoResolution.H_144P]: 0.32, | ||
| 34 | [VideoResolution.H_240P]: 0.29, | ||
| 35 | [VideoResolution.H_360P]: 0.26, | ||
| 36 | [VideoResolution.H_480P]: 0.22, | ||
| 37 | [VideoResolution.H_720P]: 0.19, | ||
| 38 | [VideoResolution.H_1080P]: 0.17, | ||
| 39 | [VideoResolution.H_1440P]: 0.16, | ||
| 40 | [VideoResolution.H_4K]: 0.14 | ||
| 41 | } | ||
| 42 | |||
| 43 | function getAverageTheoreticalBitrate (options: { | ||
| 44 | resolution: VideoResolution | ||
| 45 | ratio: number | ||
| 46 | fps: number | ||
| 47 | }) { | ||
| 48 | const targetBitrate = calculateBitrate({ ...options, bitPerPixel: averageBitPerPixel }) | ||
| 49 | if (!targetBitrate) return 192 * 1000 | ||
| 50 | |||
| 51 | return targetBitrate | ||
| 52 | } | ||
| 53 | |||
| 54 | function getMaxTheoreticalBitrate (options: { | ||
| 55 | resolution: VideoResolution | ||
| 56 | ratio: number | ||
| 57 | fps: number | ||
| 58 | }) { | ||
| 59 | const targetBitrate = calculateBitrate({ ...options, bitPerPixel: maxBitPerPixel }) | ||
| 60 | if (!targetBitrate) return 256 * 1000 | ||
| 61 | |||
| 62 | return targetBitrate | ||
| 63 | } | ||
| 64 | |||
| 65 | function getMinTheoreticalBitrate (options: { | ||
| 66 | resolution: VideoResolution | ||
| 67 | ratio: number | ||
| 68 | fps: number | ||
| 69 | }) { | ||
| 70 | const minLimitBitrate = calculateBitrate({ ...options, bitPerPixel: minLimitBitPerPixel }) | ||
| 71 | if (!minLimitBitrate) return 10 * 1000 | ||
| 72 | |||
| 73 | return minLimitBitrate | ||
| 74 | } | ||
| 75 | |||
| 76 | // --------------------------------------------------------------------------- | ||
| 77 | |||
| 78 | export { | ||
| 79 | getAverageTheoreticalBitrate, | ||
| 80 | getMaxTheoreticalBitrate, | ||
| 81 | getMinTheoreticalBitrate | ||
| 82 | } | ||
| 83 | |||
| 84 | // --------------------------------------------------------------------------- | ||
| 85 | |||
| 86 | function calculateBitrate (options: { | ||
| 87 | bitPerPixel: BitPerPixel | ||
| 88 | resolution: VideoResolution | ||
| 89 | ratio: number | ||
| 90 | fps: number | ||
| 91 | }) { | ||
| 92 | const { bitPerPixel, resolution, ratio, fps } = options | ||
| 93 | |||
| 94 | const resolutionsOrder = [ | ||
| 95 | VideoResolution.H_4K, | ||
| 96 | VideoResolution.H_1440P, | ||
| 97 | VideoResolution.H_1080P, | ||
| 98 | VideoResolution.H_720P, | ||
| 99 | VideoResolution.H_480P, | ||
| 100 | VideoResolution.H_360P, | ||
| 101 | VideoResolution.H_240P, | ||
| 102 | VideoResolution.H_144P, | ||
| 103 | VideoResolution.H_NOVIDEO | ||
| 104 | ] | ||
| 105 | |||
| 106 | for (const toTestResolution of resolutionsOrder) { | ||
| 107 | if (toTestResolution <= resolution) { | ||
| 108 | return Math.floor(resolution * resolution * ratio * fps * bitPerPixel[toTestResolution]) | ||
| 109 | } | ||
| 110 | } | ||
| 111 | |||
| 112 | throw new Error('Unknown resolution ' + resolution) | ||
| 113 | } | ||