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Code Issues Releases Activity

fix webp image export

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closes #1693

also fix quaility param for webp
This commit is contained in:
Mikael Finstad 2023-09-06 00:29:20 +02:00
parent 1e003537ed
commit f375e8ee74
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GPG Key ID: 25AB36E3E81CBC26
2 changed files with 16 additions and 5 deletions
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17
public/ffmpeg.js
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@ -284,18 +284,29 @@ function getFffmpegJpegQuality(quality) {
return Math.min(Math.max(qMin, quality, Math.round((1 - quality) * (qMax - qMin) + qMin)), qMax);
}
async function captureFrames({ from, to, videoPath, outPathTemplate, quality, filter, framePts, onProgress }) {
const ffmpegQuality = getFffmpegJpegQuality(quality);
function getQualityOpts({ captureFormat, quality }) {
if (captureFormat === 'jpeg') return ['-q:v', getFffmpegJpegQuality(quality)];
if (captureFormat === 'webp') return ['-q:v', Math.max(0, Math.min(100, Math.round(quality * 100)))];
return [];
}
function getCodecOpts(captureFormat) {
if (captureFormat === 'webp') return ['-c:v', 'libwebp']; // else we get only a single file for webp https://github.com/mifi/lossless-cut/issues/1693
return [];
}
async function captureFrames({ from, to, videoPath, outPathTemplate, quality, filter, framePts, onProgress, captureFormat }) {
const args = [
'-ss', from,
'-i', videoPath,
'-t', Math.max(0, to - from),
'-q:v', ffmpegQuality,
...getQualityOpts({ captureFormat, quality }),
...(filter != null ? ['-vf', filter] : []),
// https://superuser.com/questions/1336285/use-ffmpeg-for-thumbnail-selections
...(framePts ? ['-frame_pts', '1'] : []),
'-vsync', '0', // else we get a ton of duplicates (thumbnail filter)
...getCodecOpts(captureFormat),
'-f', 'image2',
'-y', outPathTemplate,
];

4
src/hooks/useFrameCapture.js
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@ -34,7 +34,7 @@ export default ({ formatTimecode, treatOutputFileModifiedTimeAsStart }) => {
const outPathTemplate = getSuffixedOutPath({ customOutDir, filePath, nameSuffix: nameTemplateSuffix });
const firstFileOutPath = getSuffixedOutPath({ customOutDir, filePath, nameSuffix });
await ffmpegCaptureFrames({ from: fromTime, to: toTime, videoPath: filePath, outPathTemplate, quality, filter, onProgress });
await ffmpegCaptureFrames({ from: fromTime, to: toTime, videoPath: filePath, outPathTemplate, captureFormat, quality, filter, onProgress });
return firstFileOutPath;
}
@ -42,7 +42,7 @@ export default ({ formatTimecode, treatOutputFileModifiedTimeAsStart }) => {
// see https://github.com/mifi/lossless-cut/issues/1139
const tmpSuffix = 'llc-tmp-frame-capture-';
const outPathTemplate = getSuffixedOutPath({ customOutDir, filePath, nameSuffix: getSuffix(`${tmpSuffix}%d`) });
await ffmpegCaptureFrames({ from: fromTime, to: toTime, videoPath: filePath, outPathTemplate, quality, filter, framePts: true, onProgress });
await ffmpegCaptureFrames({ from: fromTime, to: toTime, videoPath: filePath, outPathTemplate, captureFormat, quality, filter, framePts: true, onProgress });
const outDir = getOutDir(customOutDir, filePath);
const files = await readdir(outDir);