Good morning everyone again!!
I’m having the following problem with thumbnails.
I’m using CasparCG 2.4.3 on Ubuntu 22.04 Desktop.
I add several files throughout the day to play in Caspar — I do this by copying them into the folder defined in my caspar.config.
For several days everything worked fine, but one day my playout could no longer get the thumbnails for any files. When I send the command
THUMBNAIL RETRIEVE <MediaPath> or CINF <MediaPath>, Caspar returns an error as if the file doesn’t exist.
Here’s the error:
THUMBNAIL RETRIEVE SENS/NOV/03/HD/fernanda_davi
[2025-10-15 13:38:16.721] [error] Exception: ./src/protocol/util/http_request.cpp(72): Throw in function caspar::http::HTTPResponse caspar::http::request(const string&, const string&, const string&)
[2025-10-15 13:38:16.721] [error] Dynamic exception type: boost::wrapexcept<caspar::io_error>
[2025-10-15 13:38:16.721] [error] [caspar::tag_msg_info*] = Invalid Response
[2025-10-15 13:38:16.721] [error] [caspar::tag_stacktrace_info*] = 0# 0x000060CC81E036FD in casparcg-server-2.4
The only way to fix this error is by running the command THUMBNAIL GENERATE_ALL, or by restarting both Caspar and the Scanner.
My question is: do I need to periodically restart Caspar and the Scanner, or should I run the THUMBNAIL GENERATE_ALL command instead?
Has anyone else experienced this problem?
Is there a better solution for this error?
Thanks everyone for the help!