bool decode_and_process_video_packet (AVPacket* packet);
void decode_and_process_audio_packet (AVPacket* packet);
void decode_and_process_subtitle_packet (AVPacket* packet);
bool decode_and_process_video_packet (AVPacket* packet);
void decode_and_process_audio_packet (AVPacket* packet);
void decode_and_process_subtitle_packet (AVPacket* packet);