View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000506 | file | General | public | 2024-02-26 12:54 | 2024-03-01 03:31 |
| Reporter | Martin | Assigned To | christos | ||
| Priority | normal | Severity | feature | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Platform | Linux | OS | Arch Linux | OS Version | N/A |
| Product Version | 5.45 | ||||
| Fixed in Version | HEAD | ||||
| Summary | 0000506: Detect PNGs with APNG extension as such | ||||
| Description | file currently does not have any magic values for APNG PNG's, resulting it to label everything as PNG. Example image is provided on wikipedia. https://en.wikipedia.org/wiki/APNG APNG has been supported by all major browsers for years and as of recently is being standardized in the new PNG spec as a core feature. See initial changelog fragment in https://www.w3.org/TR/png-3/#changes-20031110 and scroll *UP* to see the subsequent ones. And the Explainer document for the Third Edition PNG spec https://github.com/w3c/PNG-spec/blob/main/Third_Edition_Explainer.md | ||||
| Steps To Reproduce | imagemagick's identify seems to have the same issue as file (unsure which magic file it uses, perhaps the one from file), but at least it can be forced as APNG to show the frame count if any. Using the wikipedia page image: [0] % file ball.png ball.png: PNG image data, 100 x 100, 8-bit/color RGBA, non-interlaced [0] % identify ball.png ball.png PNG 100x100 100x100+0+0 8-bit sRGB 61968B 0.000u 0:00.000 [0] % identify apng:ball.png apng:ball.png=>ball.png[0] APNG 100x100 100x100+0+0 8-bit sRGB 53670B 0.000u 0:00.000 apng:ball.png=>ball.png[1] APNG 39x63 100x100+30+36 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[2] APNG 39x56 100x100+30+40 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[3] APNG 39x65 100x100+30+34 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[4] APNG 39x77 100x100+30+22 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[5] APNG 39x81 100x100+30+18 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[6] APNG 39x83 100x100+30+16 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[7] APNG 39x85 100x100+30+14 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[8] APNG 39x91 100x100+30+8 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[9] APNG 39x97 100x100+30+2 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[10] APNG 39x37 100x100+30+2 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[11] APNG 39x36 100x100+30+2 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[12] APNG 39x37 100x100+30+2 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[13] APNG 39x97 100x100+30+2 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[14] APNG 39x95 100x100+30+4 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[15] APNG 39x91 100x100+30+8 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[16] APNG 39x89 100x100+30+10 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[17] APNG 39x85 100x100+30+14 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[18] APNG 39x79 100x100+30+20 8-bit sRGB 0.000u 0:00.000 apng:ball.png=>ball.png[19] APNG 39x75 100x100+30+24 8-bit sRGB 0.000u 0:00.000 | ||||
| Tags | No tags attached. | ||||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2024-02-26 12:54 | Martin | New Issue | |
| 2024-03-01 03:31 | christos | Assigned To | => christos |
| 2024-03-01 03:31 | christos | Status | new => assigned |
| 2024-03-01 03:31 | christos | Status | assigned => resolved |
| 2024-03-01 03:31 | christos | Resolution | open => fixed |
| 2024-03-01 03:31 | christos | Fixed in Version | => HEAD |
| 2024-03-01 03:31 | christos | Note Added: 0004015 |
