add avregister all before create avFormatContext

[kennykarnama]

Hi just found an issue when i try to run without using docker container. The issue was avformat_open_input returns error -1094995529 Here is the log

LOG: initializing all the containers, codecs and protocols.
LOG: opening the input file (2.mp4) and loading format (container) header
LOG: ERROR could not open the file, error code (Invalid data found when processing input)

Practically, it was caused because of no muxer/demuxer registerd based on this : https://stackoverflow.com/questions/39778605/ffmpeg-avformat-open-input-not-working-invalid-data-found-when-processing-input

to solve it i added

 av_register_all();
  avcodec_register_all();

[leandromoreira]

Hi @kennykarnama thanks for the heads up but calling these two functions is actually not needed anymore in ffmpeg 4.0 you had to call it because you're using an older version.

[kennykarnama]

oh ok will close it then thanks