ENCODER_FINISHED  721 ffmpeg.c               close_all_output_streams(ost, MUXER_FINISHED | ENCODER_FINISHED, ENCODER_FINISHED);
ENCODER_FINISHED  730 ffmpeg.c           ost->finished |= ENCODER_FINISHED;
ENCODER_FINISHED 1208 ffmpeg.c           ost->finished = ENCODER_FINISHED | MUXER_FINISHED;
ENCODER_FINISHED 1212 ffmpeg.c                   output_streams[of->ost_index + i]->finished = ENCODER_FINISHED | MUXER_FINISHED;