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Reference: https://www.bluebill.net/timestamps.html


Table of Contents

Install Pre-Requisits

Install ffmpeg, coreutils and jq.

Code Block
brew install ffmpeg
brew install coreutils
brew install jq


Revise Scripts

Using the scripts from https://www.bluebill.net/timestamps.html

...

See below for revised scripts. 


Fixing GoPro Video Creation Time


Check Creation Time

Code Block
./correctTime.sh DIVE_2_1_GH010089.MP4 
DIVE_2_1_GH010089.MP4

Video Create Time (Zulu):  2023-06-13T19:12:11.000000Z
Video Create Time (local): 2023-06-13T15:12:11 -0400 (EDT)
--------
Video Create Time (without timezone):2023-06-13T19:12:11
Video Create Time (to local):2023-06-13T19:12:11 -0400 (EDT)
--------
Video Create Time (to UTC):2023-06-13T23:12:11.000000Z

To update the metadata use --update

...

Code Block
ffmpeg -I <MOVIE> -c copy -metadata creation_time=2023-06-13-23:12:11.000000Z <OUTPUT>


Add Timestamp to Video

Code Block
./timestamp.sh DIVE_2_1_GH010089.corrected.MP4

...

Code Block
...
#ffmpeg -i "${INPUT}" -vf drawtext="fontsize=30:fontcolor=yellow:text='%{pts\:localtime\:${EPOCH}}':x=(w-text_w) - 10:y=(h-text_h) - 10" -vcodec libx265 -crf 28 "${OUTPUT}"

ffmpeg -i "${INPUT}" -vf drawtext="fontsize=30:fontcolor=white:text='%{pts\:localtime\:${EPOCH}}':x=(w-text_w) - 10:y=10" -crf 28 "${OUTPUT}"
...


Get Video File Information

Code Block
ffprobe -loglevel 0 -print_format json -show_format -show_streams <VIDEO_FILE> 
Code Block
{
    "streams": [
        {
            "index": 0,
            "codec_name": "aac",
            "codec_long_name": "AAC (Advanced Audio Coding)",
            "profile": "LC",
            "codec_type": "audio",
            "codec_time_base": "1/48000",
            "codec_tag_string": "mp4a",
            "codec_tag": "0x6134706d",
            "sample_fmt": "fltp",
            "sample_rate": "48000",
            "channels": 2,
            "channel_layout": "stereo",
            "bits_per_sample": 0,
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/48000",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 35213578,
            "duration": "733.616208",
            "bit_rate": "119736",
            "max_bit_rate": "128000",
            "nb_frames": "34391",
            "disposition": {
                "default": 1,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0
            },
            "tags": {
                "creation_time": "2023-07-16T15:22:49.000000Z",
                "language": "eng",
                "handler_name": "Core Media Audio"
            }
        },
        {
            "index": 1,
            "codec_name": "h264",
            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
            "profile": "High",
            "codec_type": "video",
            "codec_time_base": "1001/120000",
            "codec_tag_string": "avc1",
            "codec_tag": "0x31637661",
            "width": 1280,
            "height": 720,
            "coded_width": 1280,
            "coded_height": 720,
            "has_b_frames": 0,
            "sample_aspect_ratio": "1:1",
            "display_aspect_ratio": "16:9",
            "pix_fmt": "yuv420p",
            "level": 32,
            "color_range": "tv",
            "color_space": "bt709",
            "color_transfer": "bt709",
            "color_primaries": "bt709",
            "chroma_location": "left",
            "field_order": "progressive",
            "refs": 1,
            "is_avc": "true",
            "nal_length_size": "4",
            "r_frame_rate": "60000/1001",
            "avg_frame_rate": "60000/1001",
            "time_base": "1/60000",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 44016973,
            "duration": "733.616217",
            "bit_rate": "8069838",
            "bits_per_raw_sample": "8",
            "nb_frames": "43973",
            "disposition": {
                "default": 1,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0
            },
            "tags": {
                "creation_time": "2023-07-16T15:22:49.000000Z",
                "language": "und",
                "handler_name": "Core Media Video"
            }
        }
    ],
    "format": {
        "filename": "Dive2.mp4",
        "nb_streams": 2,
        "nb_programs": 0,
        "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
        "format_long_name": "QuickTime / MOV",
        "start_time": "0.000000",
        "duration": "733.616217",
        "size": "751679577",
        "bit_rate": "8196978",
        "probe_score": 100,
        "tags": {
            "major_brand": "mp42",
            "minor_version": "1",
            "compatible_brands": "isommp41mp42",
            "creation_time": "2023-07-16T15:22:49.000000Z"
        }
    }
}


Scripts

ScriptDescription 

This script extracts the creation_time, removes the timezone and assigns the local timezone. It then converts this back to UTC and write it back to the video. This fixes issue with GoPro Videos.

USAGE: ./correct_time.sh video.mp4 --update 

Adds Timestamp in the top right hand corner of the video.

USAGE: ./timestamp.sh video.mp4

Sets the time to the local time specified and stores in the video as UTC.

USAGE: ./setTime.sh video.mp4 '2023-06-13T19:23:59' --update