FFMPEG avformat_open_input returned error
ffmpeg
Solution
See libavutil/error.h for the error code definitions, but they mostly match negative `errno` values. You can use `av_strerror` function to get the meaningful message.
"Permission denied" most likely means the file you point to in `is->filename` could not be opened due to permissions. Run `strace` on your app if you think this isn't the case.
Problem
Sorry I have to ask this question, but I couldn't find a reference to the return codes of avformat_open_input, and I couldn't find anyone asking/answering about mine. After this call to the function ``` err = avformat_open_input(&pFormatCtx, is->filename, NULL, NULL); ``` I get err = -13. What does it mean, and if anybody answers, please also share how you know which code corresponds to which error. UPDATE: OK, I finally figured out how to turn the code into a message, and the message is "Permission denied". Does anyone have an idea where the problem with this might be?