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file repair : broken mp4 file what to do

kalimerox
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Hi ,

I know this is a little off topic but i m sure i ll find here some knowledge about that:

I recorded with my sony a7s a video file for a documentary project and while recording i accidently changed the battery without switching the cam off, so the file got truncated and is no longer readable.. but its some 3,5 gb of something.. any ideas how i could recover this?

ffmpeg -i file.mp4 gives

Code: Select all
--enable-version3 --enable-x11grab
  libavutil      55. 17.103 / 55. 17.103
  libavcodec     57. 24.102 / 57. 24.102
  libavformat    57. 25.100 / 57. 25.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 31.100 /  6. 31.100
  libavresample   3.  0.  0 /  3.  0.  0
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
C0017.MP4: Invalid data found when processing input


i tried untrunc and got
Composition time offset atom found. Out of order samples possible.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C0001.MP4':
Metadata:
major_brand : XAVC
minor_version : 16785407
compatible_brands: XAVCmp42iso2
creation_time : 2016-04-18 14:59:07
Duration: 00:01:09.60, start: 0.000000, bitrate: 52055 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], 50107 kb/s, 50 fps, 50 tbr, 50k tbn, 100 tbc (default)
Metadata:
creation_time : 2016-04-18 14:59:07
handler_name : Video Media Handler
encoder : AVC Coding
Stream #0:1(und): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, 2 channels, s16, 1536 kb/s (default)
Metadata:
creation_time : 2016-04-18 14:59:07
handler_name : Sound Media Handler
Stream #0:2(und): Data: none (rtmd / 0x646D7472), 409 kb/s (default)
Metadata:
creation_time : 2016-04-18 14:59:07
handler_name : Timed Metadata Media Handler
Failed to parse atoms in truncated file



as it is a documentary project it is a shot that cant be repeated, so any help is very much appreciated!! :)
TheDiveO
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Recovering mp4 containers can be difficult, so don't expect much. I had some success with my GoPro Hero 3 which nukes the FAT from time to time. I've written about the tools I used here: http://thediveo-e.blogspot.de/2014/03/f ... d-err.html
kalimerox
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Thank you , very nice blog!

So I just downloaded file repair the trial version and it seems to run smoothly under wine,

it scans the file and when i click on repaired movie, the preview image just gets green. so not too sure if this is a problem of wine or of my movie ;(
(edit: i found the output file and it seems to do a good job on repairing, at least i see something :) although the video hangs all vew frames etc..)
there s also some online repair sevices (like aeroquartet) i found last night that are incredible expensive (like 130$ for recovering one file) and seem to target people like me who are desperate to repair their files...
alicejolly
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It is always suggested to not record any video when your device’s battery is low or just about to die. But still if you have done this and so your MP4 file has broken then you should try the best way to fix your broken MP4 video file. And, to do so, you can follow the link below:
http://www.filerepairtool.net/blog/repair-broken-mp4-video
shivgupta
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To repair damaged or corrupted MP4 files, you can get the help of Kernel Video Repair software. It is very effective and secure software, which can help to fix any kinds of corrupted or inaccessible video file such MP4, MOV, MPEG, MJPEG, MTS, M4V, MKV, AVI, AVCHD, WEBM, ASF, WMV, FLV, DIVX, 3G2, TS, 3GP, F4V file formats. You can try it: https://www.nucleustechnologies.com/video-repair/

 
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