anthwlock
src/mp4.h:298: bool Mp4::currentChunkFinished(int): Assertion `cur_track_idx == last_track_idx_' failed
Hello,
Due to lack of space on the first SD card, the camera continued recording on the second SD card. The content on the first SD card was not saved correctly during the switch.
I tried recover the content, but it seems to detect a length of 0s for all audio and video streams. Using the -s option throws an assertion (src/mp4.h:298: bool Mp4::currentChunkFinished(int): Assertion 'cur_track_idx == last_track_idx_' failed). Details of the logs can be found at the end. Do you have any idea what might be causing this?
I have also tried changing the version of ffmpeg using 3.4.13 and 3.3.9, but the problem is still the same.
Thanks for your help!
Verbose log using `-s` option
Info: version 'v364-bd783dd' using ffmpeg 'n7.0.1' Lavc61.3.100
Info: reading 20240626_FX3_0080.MP4
Info: parsing healthy moov atom ...
Composition time offset atom found. Out of order samples possible.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x63ea48205fc0] st: 0 edit list: 1 Missing key frame while searching for timestamp: 1000
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x63ea48205fc0] st: 0 edit list 1 Cannot find an index entry before timestamp: 1000.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '20240626_FX3_0080.MP4':
Metadata:
major_brand : XAVC
minor_version : 16785407
compatible_brands: XAVCmp42iso2
creation_time : 2024-06-29T19:07:53.000000Z
Duration: 00:07:25.44, start: 0.000000, bitrate: 147049 kb/s
Stream #0:0[0x1](und): Video: h264 (High 4:2:2) (avc1 / 0x31637661), yuv422p10le(tv, bt709, progressive), 3840x2160 [SAR 1:1 DAR 16:9], 140016 kb/s, 25 fps, 25 tbr, 25k tbn (default)
Metadata:
creation_time : 2024-06-29T19:07:53.000000Z
handler_name : Video Media Handler
vendor_id : [0][0][0][0]
encoder : AVC Coding
Stream #0:1[0x2](und): Audio: pcm_s24be (ipcm / 0x6D637069), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
Metadata:
creation_time : 2024-06-29T19:07:53.000000Z
handler_name : Sound Media Handler
vendor_id : [0][0][0][0]
Stream #0:2[0x3](und): Audio: pcm_s24be (ipcm / 0x6D637069), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
Metadata:
creation_time : 2024-06-29T19:07:53.000000Z
handler_name : Sound Media Handler
vendor_id : [0][0][0][0]
Stream #0:3[0x4](und): Audio: pcm_s24be (ipcm / 0x6D637069), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
Metadata:
creation_time : 2024-06-29T19:07:53.000000Z
handler_name : Sound Media Handler
vendor_id : [0][0][0][0]
Stream #0:4[0x5](und): Audio: pcm_s24be (ipcm / 0x6D637069), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
Metadata:
creation_time : 2024-06-29T19:07:53.000000Z
handler_name : Sound Media Handler
vendor_id : [0][0][0][0]
Stream #0:5[0x6](und): Data: none (rtmd / 0x646D7472), 2252 kb/s (default)
Metadata:
creation_time : 2024-06-29T19:07:53.000000Z
handler_name : Timed Metadata Media Handler
timecode : 00:00:00:00
ftyp_ = 'XAVC'
detected 'XAVC', deactivating 'g_strict_nal_frame_check'
found avcC after: 102
remaining len:382
parsing avcC ...
len_sps: 52
decoding SPS ...
log2_max_frame_num: 6
avcC got decoded
assuming constant duration of 1000 for 'avc1' (x11136)
fallback to save upper_bound upper_bound=23653057
fallback to save upper_bound upper_bound=16832247
assuming constant duration of 1 for 'ipcm' (x21381120)
assuming constant duration of 1 for 'ipcm' (x21381120)
assuming constant duration of 1 for 'ipcm' (x21381120)
assuming constant duration of 1 for 'ipcm' (x21381120)
assuming constant duration of 1000 for 'rtmd' (x11136)
Info: special track found (meta, 'Timed Metadata Media Handler')
Info: unknown track 'ipcm' found -> fallback to dynamic stats
created dummy track 'free'
removed dummy track 'free'
first_failed: 0 of 101
simpleOrder: 5 0 1 2 3 4
order ( 101): (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040) (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040)
first_failed: 0 of 101
order: (5, 12) (0, 12) (1, 23040) (2, 23040) (3, 23040) (4, 23040)
genPatternPerm of: avc1
0 avc1 -1 0
1 ipcm -1 0
2 ipcm -1 0
3 ipcm -1 0
4 ipcm -1 0
5 rtmd -1 0
genPatternPerm of: ipcm
0 avc1 -1 0
1 ipcm -1 0
2 ipcm -1 0
3 ipcm -1 0
4 ipcm -1 0
5 rtmd -1 0
genPatternPerm of: ipcm
0 avc1 -1 0
1 ipcm -1 0
2 ipcm -1 0
3 ipcm 0 16
4 ipcm -1 0
5 rtmd -1 0
genPatternPerm of: ipcm
0 avc1 -1 0
1 ipcm -1 0
2 ipcm -1 0
3 ipcm -1 0
4 ipcm 0 32
5 rtmd -1 0
genPatternPerm of: ipcm
0 avc1 -1 0
1 ipcm -1 0
2 ipcm -1 0
3 ipcm -1 0
4 ipcm -1 0
5 rtmd 1.95894 30
genPatternPerm of: rtmd
0 avc1 1.43883 30
1 ipcm -1 0
2 ipcm -1 0
3 ipcm -1 0
4 ipcm -1 0
5 rtmd -1 0
has_zero_transitions_: 1
Info: using dynamic stats, use '-is' to see them
Stats:
first_off_: 262144
first_off_rel_: 0
max_part_size_: 23653057
avc1
ss_normal: 274452 643882 3561477 | 0 23653057 | 0.55303 1.03747 8.19352 10672
ss_keyframe: 1436331 1992745 3556260 | 995756 16832247 | 0.21509 1.29813 3.64772 464
chunk_distance_gcd_: 1
start_off_gcd_: 1
end_off_gcd_: 1
pkt_sz_gcd_: 1
pad_after_chunk_: 0
likely n_samples/chunk (p=1.00000): 12
likely sample_sizes (p=0.00000):
n_mutual_patterns: 0
avc1_ipcm (0->1) [0] (928)
avc1_ipcm (0->2) [0] (0)
avc1_ipcm (0->3) [0] (0)
avc1_ipcm (0->4) [0] (0)
avc1_rtmd (0->5) [0] (0)
ipcm
ss_normal: 3 3 3 | 3 3 | 0.00000 0.00000 0.00000 100
ss_keyframe: 3 3 3 | 3 3 | 0.00000 0.00000 0.00000 100
chunk_distance_gcd_: 1
start_off_gcd_: 1
end_off_gcd_: 1
pkt_sz_gcd_: 1
pad_after_chunk_: 0
likely n_samples/chunk (p=1.00000): 23040
likely sample_sizes (p=1.00000): 3
n_mutual_patterns: 0
ipcm_avc1 (1->0) [0] (0)
ipcm_ipcm (1->2) [0] (928)
ipcm_ipcm (1->3) [0] (0)
ipcm_ipcm (1->4) [0] (0)
ipcm_rtmd (1->5) [0] (0)
ipcm
ss_normal: 3 3 3 | 3 3 | 0.00000 0.00000 0.00000 100
ss_keyframe: 3 3 3 | 3 3 | 0.00000 0.00000 0.00000 100
chunk_distance_gcd_: 1
start_off_gcd_: 1
end_off_gcd_: 1
pkt_sz_gcd_: 1
pad_after_chunk_: 0
likely n_samples/chunk (p=1.00000): 23040
likely sample_sizes (p=1.00000): 3
n_mutual_patterns: 1
ipcm_ipcm (2->3) [1] (928)
1.000 100 ________ ________ ________ ________ 00000000 00000000 00000000 00000000
ipcm_avc1 (2->0) [0] (0)
ipcm_ipcm (2->1) [0] (0)
ipcm_ipcm (2->4) [0] (0)
ipcm_rtmd (2->5) [0] (0)
ipcm
ss_normal: 3 3 3 | 3 3 | 0.00000 0.00000 0.00000 100
ss_keyframe: 3 3 3 | 3 3 | 0.00000 0.00000 0.00000 100
chunk_distance_gcd_: 1
start_off_gcd_: 1
end_off_gcd_: 1
pkt_sz_gcd_: 1
pad_after_chunk_: 0
likely n_samples/chunk (p=1.00000): 23040
likely sample_sizes (p=1.00000): 3
n_mutual_patterns: 1
ipcm_ipcm (3->4) [1] (928)
1.000 100 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
ipcm_avc1 (3->0) [0] (0)
ipcm_ipcm (3->1) [0] (0)
ipcm_ipcm (3->2) [0] (0)
ipcm_rtmd (3->5) [0] (0)
ipcm
ss_normal: 3 3 3 | 3 3 | 0.00000 0.00000 0.00000 100
ss_keyframe: 3 3 3 | 3 3 | 0.00000 0.00000 0.00000 100
chunk_distance_gcd_: 1
start_off_gcd_: 1
end_off_gcd_: 1
pkt_sz_gcd_: 1
pad_after_chunk_: 0
likely n_samples/chunk (p=1.00000): 23040
likely sample_sizes (p=1.00000): 3
n_mutual_patterns: 1
ipcm_rtmd (4->5) [1] (927)
1.000 100 00000000 00000000 00000000 00000000 001c0100 09712273 f0010010 2000____
ipcm_avc1 (4->0) [0] (0)
ipcm_ipcm (4->1) [0] (0)
ipcm_ipcm (4->2) [0] (0)
ipcm_ipcm (4->3) [0] (0)
rtmd
ss_normal: 11264 11264 11264 | 11264 11264 | 0.00000 0.00000 0.00000 100
ss_keyframe: 11264 11264 11264 | 11264 11264 | 0.00000 0.00000 0.00000 100
chunk_distance_gcd_: 1
start_off_gcd_: 1
end_off_gcd_: 1
pkt_sz_gcd_: 1
pad_after_chunk_: 0
likely n_samples/chunk (p=1.00000): 12
likely sample_sizes (p=1.00000): 11264
n_mutual_patterns: 1
rtmd_avc1 (5->0) [1] (928)
1.000 100 00000000 00000000 00000000 00000000 00000002 09100000 00110600 0d80____
rtmd_ipcm (5->1) [0] (0)
rtmd_ipcm (5->2) [0] (0)
rtmd_ipcm (5->3) [0] (0)
rtmd_ipcm (5->4) [0] (0)
ss: max_part_size_: 23653057
fallback: 1
calling findMdat on truncated file..
Warning: no mp4-structure found in: '20240626_FX3_0081.mp4'
Info: using orig_mdat_start_ (=262128)
Info: reading mdat from truncated file ...
Info: using 64-bit offsets for the broken file
avc1: failed for no particular reason
wouldMatch(8, skip="", force_strict=0, very_first=0) -> no // last_idx (-1) < 0
(reading element from mdat)
Offset: 0x0 / 0x3fff8 : edb01312 250d81de
trying chunkPredict first..
called getChunkPrediction(0x0 / 0x3fff8) ...
chunk derived from track_order_: 'rtmd' (11264 x12)
edb01312 250d81de e822d35f b41ef900 fd9319d1 ef6cc879 ec71d0e7 61e5d878
00000000 00000000 00000000 00000000 001c0100 09712273 f0010010 2000____
anyPatternMatchesHalf does not agree c.track_idx_=5
used stepToNextOwnChunkAbs of likelyNextTrack -> 0
(reading element from mdat)
Offset: 0x21000 / 0x60ff8 : 57897b07 92da8a69
trying chunkPredict first..
called getChunkPrediction(0x21000 / 0x60ff8) ...
Next track 'avc1' has unpredictable chunks
Track codec: avc1
avc1: failed for no particular reason
Track codec: ipcm
Track codec: ipcm
Track codec: ipcm
Track codec: ipcm
Track codec: rtmd
unknown sequence -> enabling noise buffer ..
[[ 2216384276 bytes omitted, next 2002 bytes were buffered ]]
......
[a lot of content omitted]
(reading element from mdat)
Offset: 0xcf45eea / 0xcf85ee2 : 59bf411c 1c97180b
Track codec: avc1
avc1: no match because of nal type: 28
Track codec: ipcm
Track codec: ipcm
Track codec: ipcm
Track codec: ipcm
Track codec: rtmd
called getChunkPrediction(0xcf45eea / 0xcf85ee2) ...
src/mp4.h:298: bool Mp4::currentChunkFinished(int): Assertion `cur_track_idx == last_track_idx_' failed.
Hey - please send me the files (healthy+broken) and I might take a look at some point. You can upload them on wetransfer (2GB limit) or dropmefiles.net (100GB limit). If you think they are too big, you can use `untrunc -sh file.mp4`. In case you want to keep the link private, you can send me an email - see my Profile page. Thank you!
@rattkin Feel free to send me your files too - once I get around looking into this, they might be very helpful. If the files are large, please check if the bug is already reproducible with shortened files (untrunc -sh file.mp4). Thank you
@anthwlock the shortened file works! Can I try restoring more than 500 mb? The entire file is 5516486208 bytes
@rattkin You can specify the size in MB as optional parameter, e.g. untrunc -sh file.mp4 1000 for the first 1GB. Feel free to send me the shortest file on which the problem is reproducible (plus the reference file)
@anthwlock Thank you, it works, I get almost half of the video. Can I skip over the bad part and process the rest of the file? Rangle parameter? I tried it but can't get it working:
c:\tmp>untrunc.exe -range 20000:55000 working.mp4 broken.mp4
Info: version 'v367-13cafed' using ffmpeg '3.3.4' Lavc57.89.100
Info: reading working.mp4
Info: parsing healthy moov atom ...
Composition time offset atom found. Out of order samples possible.
Info: special track found (meta, 'Timed Metadata Media Handler')
Info: unknown track 'twos' found -> fallback to dynamic stats
Info: using dynamic stats, use '-is' to see them
Info: range: 20000:55000 -> 19992:55000 (35000)
Info: reading mdat from truncated file ...
Info: using 64-bit offsets for the broken file
Error: unable to find correct codec -> premature end (~0%)
try '-s' to skip unknown sequences
Info: Found 0 packets ( avc1: 0 avc1-keyframes: 0 twos: 0 rtmd: 0 )
Info: Duration of avc1: (0 ms)
Info: Duration of twos: (0 ms)
Info: Duration of rtmd: (0 ms)
Info: pruned empty 'avc1' track
Info: pruned empty 'twos' track
Info: pruned empty 'rtmd' track
Info: saving broken.mp4_fixed-dyn.mp4
c:\tmp>untrunc.exe -range 20000:55000 -s working.mp4 broken.mp4
Info: version 'v367-13cafed' using ffmpeg '3.3.4' Lavc57.89.100
Info: reading working.mp4
Info: parsing healthy moov atom ...
Composition time offset atom found. Out of order samples possible.
Info: special track found (meta, 'Timed Metadata Media Handler')
Info: unknown track 'twos' found -> fallback to dynamic stats
Info: using dynamic stats, use '-is' to see them
Info: range: 20000:55000 -> 19992:55000 (35000)
Info: reading mdat from truncated file ...
Info: using 64-bit offsets for the broken file
src/mp4.cpp:2142: void Mp4::onFirstChunkFound(int): Assertion `next_chunk_idx_ == 0' failed.
The link shows me a 404 page. Please also include the reference file - Thank you
The link shows me a 404 page. Please also include the reference file - Thank you
Sorry I had problems uploading. Here are the video files: https://mega.nz/file/wuoBzYxL#SLHx5wgxbXPsflEcarqbK1QzCuD-OFm6RcCTSzeFHWU https://mega.nz/file/Iu4TFCIQ#SHSkKdEguEj-NU8PSTwz_b_57qvKvHjF4BLAllmae_Y
Same case, but for file 56G.
untrunc -sh E:\BaiduNetdiskDownload\Fx3\C3952.MP4 1000
Info: version 'v367-13cafed' using ffmpeg '3.3.4' Lavc57.89.100
Info: 'E:\BaiduNetdiskDownload\Fx3\C3952.MP4' has invalid atom lenghts, see '-f'
28173
E:\Downloads\Compressed\untrunc_x64
λ untrunc -sh E:\BaiduNetdiskDownload\Fx3\C3951.MP4 1000
Info: version 'v367-13cafed' using ffmpeg '3.3.4' Lavc57.89.100
65536
Hi,
I'm facing a similar case and have no idea if I still have any further options to recover my corrupt mp4 file generated by my sony alpha6600 camera. Could anyone please help me? Thank you in advance.
Key errors:
Error: unable to find correct codec -> premature end (~3.495%) src/mp4.h:298: bool Mp4::currentChunkFinished(int): Assertion `cur_track_idx == last_track_idx_' failed.
Printout:
Z:\Downloads\untrunc_x64\untrunc_x64>untrunc.exe -w C0019.MP4 C0020.MP4 Info: version 'v367-13cafed' using ffmpeg '3.3.4' Lavc57.89.100 Info: reading C0019.MP4 Info: parsing healthy moov atom ... Composition time offset atom found. Out of order samples possible. Info: special track found (meta, 'Timed Metadata Media Handler')
Info: unknown track 'twos' found -> fallback to dynamic stats Info: using dynamic stats, use '-is' to see them Info: reading mdat from truncated file ... Info: using 64-bit offsets for the broken file Warning: 0-type NAL-unit (len=9964089, type=0) Warning: New access unit since seen picture (type: 0) Warning: 0-type NAL-unit (len=9964089, type=0) Error: unable to find correct codec -> premature end (~3.495%) try '-s' to skip unknown sequences
Info: Found 3199183 packets ( avc1: 1996 avc1-keyframes: 67 twos: 3195192 rtmd: 1995 ) Info: Duration of avc1: 1min 6s 599ms (66599 ms) Info: Duration of twos: 1min 6s 566ms (66566 ms) Info: Duration of rtmd: 1min 6s 566ms (66566 ms) Info: saving C0020.MP4_fixed-dyn.MP4
Z:\Downloads\untrunc_x64\untrunc_x64>untrunc.exe -w -s C0019.MP4 C0020.MP4 Info: version 'v367-13cafed' using ffmpeg '3.3.4' Lavc57.89.100 Info: reading C0019.MP4 Info: parsing healthy moov atom ... Composition time offset atom found. Out of order samples possible. Info: special track found (meta, 'Timed Metadata Media Handler')
Info: unknown track 'twos' found -> fallback to dynamic stats Info: using dynamic stats, use '-is' to see them Info: reading mdat from truncated file ... Info: using 64-bit offsets for the broken file Warning: 0-type NAL-unit (len=9964089, type=0) Warning: New access unit since seen picture (type: 0) Warning: 0-type NAL-unit (len=9964089, type=0) Warning: buffer exceeded by: 1639221 Warning: buffer exceeded by: 1523523 Warning: 0-type NAL-unit (len=1, type=0) Warning: found chunk has no future: '????' (0 x0) at 0x0 / 0xc0 Warning: 0-type NAL-unit (len=1, type=0) Warning: found chunk has no future: '????' (0 x0) at 0x0 / 0xc0 Warning: found chunk has no future: '????' (0 x0) at 0x0 / 0xc0 Warning: found chunk has no future: '????' (0 x0) at 0x0 / 0xc0 Warning: found chunk has no future: '????' (0 x0) at 0x0 / 0xc0 Warning: found chunk has no future: '????' (0 x0) at 0x0 / 0xc0 Warning: found chunk has no future: '????' (0 x0) at 0x0 / 0xc0 Warning: found chunk has no future: '????' (0 x0) at 0x0 / 0xc0 Warning: found chunk has no future: '????' (0 x0) at 0x0 / 0xc0 src/mp4.h:298: bool Mp4::currentChunkFinished(int): Assertion `cur_track_idx == last_track_idx_' failed.
Z:\Downloads\untrunc_x64\untrunc_x64>untrunc.exe -w -s -is C0019.MP4 C0020.MP4 Info: version 'v367-13cafed' using ffmpeg '3.3.4' Lavc57.89.100 Info: reading C0019.MP4 Info: parsing healthy moov atom ... Composition time offset atom found. Out of order samples possible. Info: special track found (meta, 'Timed Metadata Media Handler')
Stats: first_off_: 192 first_off_rel_: 0 max_part_size_: 13163687
avc1 ss_normal: 37084 190364 1890416 | 0 13163687 | 1.42742 0.56409 6.25642 6220 ss_keyframe: 868355 1504109 1876594 | 694684 2122512 | 0.16350 2.58523 1.51468 215 chunk_distance_gcd_: 1 start_off_gcd_: 1 end_off_gcd_: 1 pkt_sz_gcd_: 1 pad_after_chunk_: 0 likely n_samples/chunk (p=1.00000): 15 likely sample_sizes (p=0.00000): n_mutual_patterns: 0 avc1_twos (0->1) [0] (429) avc1_rtmd (0->2) [0] (0)
twos ss_normal: 4 4 4 | 4 4 | 0.00000 0.00000 0.00000 100 ss_keyframe: 4 4 4 | 4 4 | 0.00000 0.00000 0.00000 100 chunk_distance_gcd_: 1 start_off_gcd_: 1 end_off_gcd_: 1 pkt_sz_gcd_: 1 pad_after_chunk_: 0 likely n_samples/chunk (p=1.00000): 24024 likely sample_sizes (p=1.00000): 4 n_mutual_patterns: 1 twos_rtmd (1->2) [1] (428) 1.000 100 ________ ________ ________ ________ 001c0100 013c02a8 f0010010 01______ twos_avc1 (1->0) [0] (0)
rtmd ss_normal: 1024 1024 1024 | 1024 1024 | 0.00000 0.00000 0.00000 100 ss_keyframe: 1024 1024 1024 | 1024 1024 | 0.00000 0.00000 0.00000 100 chunk_distance_gcd_: 1 start_off_gcd_: 1 end_off_gcd_: 1 pkt_sz_gcd_: 1 pad_after_chunk_: 0 likely n_samples/chunk (p=1.00000): 15 likely sample_sizes (p=1.00000): 1024 n_mutual_patterns: 1 rtmd_avc1 (2->0) [1] (429) 1.000 100 00000000 00000000 00000000 00000000 00000002 09100000 00__0600 0d80____ rtmd_twos (2->1) [0] (0)
Z:\Downloads\untrunc_x64\untrunc_x64>
ok files: https://drive.google.com/file/d/1jtWxgYd6AL8M9PS38iq-uwH-2cuIcSo_/view?usp=sharing https://drive.google.com/file/d/1hAp7VvBuHwWAGm5ZqtEuhJ_W9XePuuKx/view?usp=sharing
nok file: https://drive.google.com/file/d/1zTNyPJzMhFM5cM5D2OsK7VVFKh8o8N-p/view?usp=sharing
