The error message "co located POCs unavailable" is reported when the co-located picture of an H.264 B frame is missing during spatial direct predition. It comes from this line: https://github.com/FFmpeg/FFmpeg/blob/n4.1.1/libavcodec/h264_direct.c#L156 and was originally commited for solving an issue found by fuzzing: https://bugzilla.mozilla.org/show_bug.cgi?id=1230286.
I think the condition is quite normal for live streaming, 1) when the player first connects to the streaming server, it may receive B frames whose reference frames have never been sent; 2) when the bandwidth is limited, the server purposely drops packets due to buffer overflow. IMHO the log level should be on par with "Frame num gap" (if `gaps_in_frame_num_value_allowed_flag` is false) and "no picture" (both are found in h264_slice.c and use DEBUG level). _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
