Searched and found some historical hits to playback problems but nothing more recent than 4-5 yrs old and none with identical issue.
Previously had a 3Tb Samsung D3 powered external HDD with libraries consisting of MPEG4 container video and MP3 music files held within. Connected to a Samsung TV via USB3 port. All good. All play fine.
Also have a WD MyCloud NAS attached over WiFi. Identical media library replicated (so x2 discrete copies for redundancy, but also serve different TVs in the household). All good. All play fine.
Ran out of space and thus replaced the Samsung D3 HDD with a 6Tb WD MyBook. Copied the libraries across devices and connect MyBook to Samsung TV via USB3. All good. All historical library files play fine.
Now add new MPEG4 container video files (codecs variations of both H264+ACC and also mpeg4+acc) to the new 6Tb MyBook HDD and TV says “file format not known”. Transfer the same files to the old 3Tb D3 HDD and they play perfect on same TV. Files also play from the WD MyCloud over WiFi.
All the old video files in the library were converted the identical metholody and play fine. Only new additional files to the MyBook HDD fail from i.e. file playback failure is only from the new 6Tb WD MyBook. Formatted to FAT32 etc as required by the TV. Approx 5000 video files in the library so not excessive. (+ about 35K music files)
Anyone have a clue as to why the external, powered WD MyBook USB3 HDD can’t feed the new video files when other devices function perfectly over both USB3 and WiFi please? And previous video files still work A-OK?
It’s def specific to this external HDD and have replicated it on x2 different Samsung TVs with x2 6Tb WD MyBooks (copied library to both and replicated the issue). So Definitely MyBook specific. Why would a HDD selectively fail to feed MPEG4 video files?
Any pointers appreciated, or to any links to other postings which I may have missed.
Many thanks team.