View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0016491 | MMW 5 | Codecs | public | 2020-04-05 13:16 | 2020-04-05 15:03 |
| Reporter | peke | Assigned To | |||
| Priority | immediate | Severity | minor | Reproducibility | always |
| Status | closed | Resolution | won't fix | ||
| Target Version | 5.0 | ||||
| Summary | 0016491: M4A: Some Files Are read as Mono But they are stereo | ||||
| Description | Tested in Both MM4 and MM5 File is read incorrectly as Mono 22Khz. Based on User description in Topic he uses POIKOSOFT encoder. File supplied at http://www.mediamonkey.com/forum/viewtopic.php?f=1&t=85474 | ||||
| Tags | No tags attached. | ||||
| Fixed in build | |||||
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The file has wrong ESDS atom (Audio Specific Config - https://wiki.multimedia.cx/index.php?title=MPEG-4_Audio#Audio_Specific_Config). There is 22kHz mono with channel configuration "Center only". So the bug is on encoder side. That is why Media Foundation decodes this as mono, as they also read this specific config. Ignoring ESDS could lead to wrong parsing of files, which contain correct data in ESDS, I would rather leave it as it is. |
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By ignoring ESDS I would only affect our parser and file format info in our application, but I could not change it in MS Media Foundation decoder, so decoding would be still wrong... |
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I agree, Closing. User is instructed to contact POIKOSOFT, so that they can fix this in their encoder. |
