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better threshold detection

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minjaesong
2025-04-19 11:48:52 +09:00
parent 47468e4395
commit 4e063fe08e
1 changed files with 11 additions and 7 deletions
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18
assets/disk0/tvdos/bin/encodemov2.js
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@@ -1,19 +1,21 @@
// some manual configurations // some manual configurations
// //
let IPFMODE = 3 // 1 or 2 let IPFMODE = 3 // 1 or 2
let TOTAL_FRAMES = 800 let TOTAL_FRAMES = 15347
let FPS = 24 // must be integer let FPS = 30 // must be integer
let WIDTH = 560 let WIDTH = 560
let HEIGHT = 448 let HEIGHT = 448
let PATHFUN = (i) => `C:/welkom/${(''+i).padStart(4,'0')}.png` // how can be the image file found, if a frame number (starts from 1) were given let PATHFUN = (i) => `C:/yain/${(''+i).padStart(5,'0')}.png` // how can be the image file found, if a frame number (starts from 1) were given
let AUDIOTRACK = 'C:/welkom.pcm' let AUDIOTRACK = 'C:/yain.mp2'
let AUDIOFORMAT = 'PCMu8' // undefined or PCMu8 or MP2fr let AUDIOFORMAT = 'MP2fr' // undefined or PCMu8 or MP2fr
// to export video to its frames (with automatic scaling and cropping): // to export video to its frames (with automatic scaling and cropping):
// ffmpeg -i file.mp4 -vf scale=560:448:force_original_aspect_ratio=increase,crop=560:448 file/%05d.png // ffmpeg -i file.mp4 -vf scale=560:448:force_original_aspect_ratio=increase,crop=560:448 file/%05d.png
// //
// to convert audio to MP2: // to convert audio to MP2:
// ffmpeg -i file.mp4 -acodec libtwolame -psymodel 4 -b:a <rate>k -ar 32000 output.mp2 // ffmpeg -i file.mp4 -acodec libtwolame -psymodel 4 -b:a <rate>k -ar 32000 output.mp2
// //
const FPS_IS_NTSC = true // when set to true, every 1000th frame will be dropped
const KEYFRAME_DETECTION_THRESHOLD = 0.576
// end of manual configuration // end of manual configuration
let MP2_RATE_INDEX; let MP2_RATE_INDEX;
let MP2_PACKETSIZE; let MP2_PACKETSIZE;
@@ -173,8 +175,10 @@ for (let f = 1; ; f++) {
audioRemaining -= actualBytesToRead audioRemaining -= actualBytesToRead
} }
} }
if (FPS_IS_NTSC && f > 0 && f % 1000 == 0) {
}
// insert video frame // insert video frame
if (f <= TOTAL_FRAMES) { else if (f <= TOTAL_FRAMES) {
let fname = PATHFUN(f) let fname = PATHFUN(f)
let framefile = files.open(_G.shell.resolvePathInput(fname).full) let framefile = files.open(_G.shell.resolvePathInput(fname).full)
let fileLen = framefile.size let fileLen = framefile.size
@@ -192,7 +196,7 @@ for (let f = 1; ; f++) {
// get the difference map // get the difference map
let patchEncodedSize = graphics.encodeIpf1d(ipfAreaOld, ipfAreaNew, ipfDelta, WIDTH, HEIGHT) let patchEncodedSize = graphics.encodeIpf1d(ipfAreaOld, ipfAreaNew, ipfDelta, WIDTH, HEIGHT)
if (f < 2 || f == TOTAL_FRAMES || patchEncodedSize > WIDTH * HEIGHT * 0.70) patchEncodedSize = 0 if (f < 2 || f == TOTAL_FRAMES || patchEncodedSize > WIDTH * HEIGHT * KEYFRAME_DETECTION_THRESHOLD) patchEncodedSize = 0
// decide whether or not the patch encoding should be used // decide whether or not the patch encoding should be used
let gzlen = gzip.compFromTo( let gzlen = gzip.compFromTo(