APNG file size is huge - 15x larger than gifs · wulkano/kap#910

(2 comments) (0 reactions) (0 assignees)JavaScript (11,043 stars) (548 forks)batch import

Help Wanted

説明

I exported the same short 8 second, 800x550 pixel clip at 15 FPS to mp4, gif and apng.

The mp4 is 76kb The gif is 870kb The apng is 12.6mb

According to these tests run using gifapng APNG should be smaller filesize than GIF.

There seems to be some major bloat/issue with the way Kap is exporting APNGs.

Gif Example test

All examples in zip (as Github doesnt support APNG) test-exports.zip

技術スタック: javascriptelectron
領域: desktopperformance
Issue 種別: bug
難度: 3
推定時間: half day
活動状況: stale
明確さ: clear
前提条件: Basic understanding of image encodingKnowledge of Kap's export pipeline
初心者向け度: 60
調査方針: Start by examining the APNG export code in Kap's source repository, likely under the 'export' or 'formats' directory. Compare the generated APNG file structure to expected output from tools like gifapng. Look for issues such as duplicate frames, incorrect disposal methods, or lack of compression. The attached zip file contains example outputs for reference. Additionally, review the two existing comments on the issue for any hints or suggestions from the community.