anno_preprocess/preprocess_perfeature_sample.py

#####################
#Annotate in naive way
#####################

import json
import pickle
import numpy as np

# Error : somewhere [0,0,0] produced - SOLVED

av_train_annotation_path =  '/scratch/junhyeok/ego4d_dataset/v2/annotations/av_val.json'

with open(av_train_annotation_path, "r") as f:
    av_train_annotations = json.load(f)

av_train_processed = {}

for video in av_train_annotations['videos'] :
    for clip in video['clips'] :
        uid = clip['clip_uid']
        # Make embedding template
        end_frame = clip['clip_end_frame']
        #feature_num = int(np.ceil(end_frame/6))
        feature_num = int(np.round(end_frame/6))
        if feature_num != 1500  :
            print('uid : {} , feature_length : {}'.format(uid , feature_num))
        anno = np.zeros((feature_num , 3))
        # Suppose no action in frame for default
        anno[:,0]=1

        i=0
        if clip['transcriptions'] == [] :
            continue
        else:
            av_train_processed[uid] = {}
            for transcript in clip['transcriptions']:
                # To make annotation by clip frame, need to subtract video_start_frame from transcription's start_frame
                if i==0 :
                    initial_frame = clip['video_start_frame']
                    i+=1

                #Save frame range
                start_frame = transcript['video_start_frame'] - initial_frame
                end_frame = transcript['video_end_frame'] - initial_frame

                #Save action encoding
                if int(transcript['person_id']) == 0 :
                    encode_num = 1
                if int(transcript['person_id']) >= 1 :
                    encode_num = 2
                if int(transcript['person_id']) == -1 :
                    encode_num = 0
                
                #Save encoding by feature
                if end_frame//6 - start_frame//6 == 0 :
                    anno[(start_frame//6)-1 , 0] = 0
                    anno[(start_frame//6)-1 , encode_num]=1
                else :
                    anno[(start_frame//6)-1 : (end_frame//6) , 0] = 0
                    anno[(start_frame//6)-1 : (end_frame//6) , encode_num]=1
                    

                #Save annotation to uid list
                av_train_processed[uid]['anno'] = anno
                av_train_processed[uid]['feature_length'] = feature_num


print('Processing DONE!')

with open('val_perfeature_sample.pickle' , 'wb') as f :
    pickle.dump(av_train_processed , f)

print('SAVED')