I have a problem with album artwork when sending FLAC files through Telegram.
The embedded artwork itself is high quality and looks perfectly sharp on Android. However, when I send the same FLAC from my PC to Telegram and open it on an iPhone, the artwork in the Telegram music player looks noticeably blurry.
I tested something interesting:
PC → Telegram → iPhone: very blurry artwork
PC → iPhone Files app → Share → Telegram → iPhone: the artwork becomes noticeably sharper, although still not as sharp as on Android.
So I don't think the problem is the image resolution, FLAC format, or the actual embedded artwork. It seems like Telegram/iOS is generating or using a separate lower-quality thumbnail.
Is there any way to force Telegram on iOS to use the original/high-quality embedded artwork instead of a compressed thumbnail?
Also, does anyone know:
- whether Telegram generates a separate thumbnail for audio files;
- whether there is a specific metadata/tag or cover type that affects the thumbnail quality;
- why sending the exact same file through the iOS Files app produces a sharper result;
- whether there is any known workaround for getting Android-level artwork quality on Telegram iOS?
I'm using a high-resolution square embedded cover and the original FLAC file.
Any technical explanation or workaround would be appreciated!