Encoded FLV file?

[eddiex666]

I have a FLV file that i cannot convert.
mediainfo sayes:

Complete name : 20221220112418.687_h264_high_p0_EVENT.flv
Format : Flash Video
File size : 6.01 MiB
Duration : 1 min 32 s
Overall bit rate mode : Variable
Overall bit rate : 548 kb/s
starttime : 1671535458.687
encrypt : 1.000

Video
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.1
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 1 frame
Codec ID : 7
Duration : 1 min 32 s
Bit rate mode : Variable
Bit rate : 977 kb/s
Maximum bit rate : 1 961 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 12.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.088
Stream size : 10.7 MiB
Color range : Full
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709


I try this command:
ffmpeg -i 20221220112418.687_h264_high_p0_EVENT.flv

[h264 @ 0x55740f00b0c0] Invalid NAL unit size (-1290772213 > 64830).
[h264 @ 0x55740f00b0c0] missing picture in access unit with size 64834
[h264 @ 0x55740f00b0c0] Invalid NAL unit size (-1290772213 > 64830).
[h264 @ 0x55740f00b0c0] Error splitting the input into NAL units.
[flv @ 0x55740f0095c0] decoding for stream 0 failed
[flv @ 0x55740f0095c0] Could not find codec parameters for stream 0 (Video: h264, none, 1000 kb/s): unspecified size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, flv, from '20221220112418.687_h264_high_p0_EVENT.flv':
Metadata:
starttime : 1671535459
encrypt : 1
canSeekToEnd : true
Duration: 00:05:00.00, start: 0.000000, bitrate: 168 kb/s
Stream #0:0: Video: h264, none, 1000 kb/s, 12 fps, 1k tbr, 1k tbn


The video files is from a NVR disk and it may be encrypted in any ways..
I attach a example file


Any tips folkens?

[ProWo]

The file is encrypted.

[NULL @ 00000228cb343800] Invalid NAL unit size (353701380 > 228853).
[NULL @ 00000228cb343800] missing picture in access unit with size 228857
[h264 @ 00000228cb343800] Invalid NAL unit size (353701380 > 228853).
[h264 @ 00000228cb343800] Error splitting the input into NAL units.
[h264 @ 00000228cb343800] Invalid NAL unit size (353705752 > 4356).
[h264 @ 00000228cb343800] missing picture in access unit with size 4360
[h264 @ 00000228cb343800] Invalid NAL unit size (353705752 > 4356).
[h264 @ 00000228cb343800] Error splitting the input into NAL units.
[h264 @ 00000228cb343800] Invalid NAL unit size (353702810 > 7558).
[h264 @ 00000228cb343800] missing picture in access unit with size 7562
[h264 @ 00000228cb343800] Invalid NAL unit size (353702810 > 7558).
[h264 @ 00000228cb343800] Error splitting the input into NAL units.
[h264 @ 00000228cb343800] Invalid NAL unit size (353708202 > 9910).
[h264 @ 00000228cb343800] missing picture in access unit with size 9914
[h264 @ 00000228cb343800] Invalid NAL unit size (353708202 > 9910).
[h264 @ 00000228cb343800] Error splitting the input into NAL units.
[h264 @ 00000228cb343800] Invalid NAL unit size (353707491 > 11263).
[h264 @ 00000228cb343800] missing picture in access unit with size 11267
[h264 @ 00000228cb343800] Invalid NAL unit size (353707491 > 11263).
[h264 @ 00000228cb343800] Error splitting the input into NAL units.
[h264 @ 00000228cb343800] Invalid NAL unit size (353706234 > 12006).
[h264 @ 00000228cb343800] missing picture in access unit with size 12010
[h264 @ 00000228cb343800] Invalid NAL unit size (353706234 > 12006).
[h264 @ 00000228cb343800] Error splitting the input into NAL units.
[h264 @ 00000228cb343800] Invalid NAL unit size (353713687 > 12299).
[h264 @ 00000228cb343800] missing picture in access unit with size 12303
[h264 @ 00000228cb343800] Invalid NAL unit size (353713687 > 12299).
[h264 @ 00000228cb343800] Error splitting the input into NAL units.
[h264 @ 00000228cb343800] Invalid NAL unit size (353713308 > 12928).
[h264 @ 00000228cb343800] missing picture in access unit with size 12932

[Selur]

Might be an encryption or a broken file

[eddiex666]

How can it be decrypted?

What do i need? Hash, password ?

[Selur]

I looked at the file in a hex editor and it mentioned 'encrypt',

Since you didn't mention anything about the source, I suspect that it might be encrypted.

To decrypt it, you would need a decryption key and a tool which knows the used encryption and that can decode it with the key.
Others might know more if you share some details about the source of the file,...

Cu Selur

[eddiex666]

Sorry for little info
The file is from a Eagle Eye NVR
The file is encrypted.

I have some files from the broken disk, but i dont know What file/password to search for.

[Selur]

You probably need some special software to playback/convert the file.
Best look at the side of the manufacturer and if there is nothing, contact their support.