Why can’t you stop buying 618?From the technical dimension to explore>>>

When opening HP wide vision HD camera through ffmpeg, the following errors are encountered:

[mjpeg @ 0000029be7cbd000] unable to decode APP fields: Invalid data found when processing input

This error was encountered while reading video stream information:

int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options);

The same error will be output when decoding with the following function:

int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt);

Although there is an error output, it does not affect the running results. After searching for a long time, we did not see a suitable solution

Only the following links have been met, just change the camera, but no reason has been found

https://stackoverflow.com/questions/55439184/getting-unable-to-decode-app-fields-while-playing-usb-webcam-stream-through-ff

There is also a similar problem encountered in Python code, but it is not sure whether it is a problem:

https://github.com/mikeboers/PyAV/issues/107

Write it down first. If anyone can answer it, please leave a message in the comments. Thank you very much