Succeed creating a small file of few KB, not complete video

[Vincent14]

Hello,

With ffmpeg i tried: avconv -i VID_0757.3gp
I got: [mov,mp4,m4a,3gp,3g2,mj2 @ 0xca2840] moov atom not found
VID_0757.3gp: Invalid data found when processing input

I tried to solve my video with untrunc but unfortunatly, the file produceed is too small and doesn't contain my full video.

If I give you samples (2 small files, less than 20Mo), could you give a try please? Where can I contact you?

[DEfusion]

I get the same issue, 3.5GB source video results in a working 2.5MB 2 second video. This is the output I get:

Composition time offset atom found. Out of order samples possible.
Sample dependency flag atom found. I and P frames might need to recover that info.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/media/share/working.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 0
    compatible_brands: qt  
    creation_time   : 2014-12-28 15:38:04
  Duration: 00:29:15.98, start: 0.000000, bitrate: 7141 kb/s
    Stream #0.0(und): Video: h264 (High), yuv420p, 2554x1220, 7137 kb/s, PAR 1:1 DAR 1277:610, 27.87 fps, 600 tbn, 50 tbc
    Metadata:
      creation_time   : 2014-12-28 15:38:04
Nal type: 6
Length for first packet = 24 / 800000
Nal type: 5
Length for first packet = 581797 / 800000
Nal type: 1
Length for first packet = 2101 / 800000
Nal type: 1
Length for first packet = 4627 / 800000
Nal type: 1
Length for first packet = 519 / 800000
Nal type: 1
Length for first packet = 103 / 800000
Nal type: 1
Length for first packet = 25000 / 800000
Nal type: 1
Length for first packet = 206 / 800000
Nal type: 1
Length for first packet = 150597 / 800000
Nal type: 1
Length for first packet = 1335 / 800000
Nal type: 1
Length for first packet = 309202 / 800000
Nal type: 1
Length for first packet = 462 / 800000
Nal type: 1
Length for first packet = 559476 / 800000
Nal type: 1
Length for first packet = 694 / 800000
Nal type: 1
Length for first packet = 184976 / 800000
Nal type: 1
Length for first packet = 8488 / 800000
Nal type: 1
Length for first packet = 135828 / 800000
Nal type: 1
Length for first packet = 10761 / 800000
Nal type: 1
Length for first packet = 48902 / 800000
Nal type: 1
Length for first packet = 7931 / 800000
Nal type: 1
Length for first packet = 33203 / 800000
Nal type: 1
Length for first packet = 7115 / 800000
Nal type: 1
Length for first packet = 30586 / 800000
Nal type: 1
Length for first packet = 7130 / 800000
Nal type: 1
Length for first packet = 30053 / 800000
Nal type: 1
Length for first packet = 7155 / 800000
Nal type: 1
Length for first packet = 29472 / 800000
Nal type: 1
Length for first packet = 7272 / 800000
Nal type: 1
Length for first packet = 40980 / 800000
Nal type: 1
Length for first packet = 6636 / 800000
Nal type: 1
Length for first packet = 29721 / 800000
Nal type: 1
Length for first packet = 6378 / 800000
Nal type: 1
Length for first packet = 28424 / 800000
Nal type: 1
Length for first packet = 6325 / 800000
Nal type: 1
Length for first packet = 28227 / 800000
Nal type: 1
Length for first packet = 6480 / 800000
Nal type: 1
Length for first packet = 32568 / 800000
Nal type: 1
Length for first packet = 6474 / 800000
Nal type: 1
Length for first packet = 35549 / 800000
Nal type: 1
Length for first packet = 6371 / 800000
Nal type: 1
Length for first packet = 28400 / 800000
Nal type: 1
Length for first packet = 6303 / 800000
Nal type: 1
Length for first packet = 1444822 / 800000
Found 42 packets

I tried to provide other working videos from the same capture device to see if that helped but with all but one I get:

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
Aborted (core dumped)

[ponchio]

Ciao, and sorry for the delay in answering.

This happens when for some reason a packet is not recognized. The reasons can be many (corrupted video, bug in my code, unespected NAL (I still do not understand much of it).

Write me at [email protected] and send me a small working video and a few (10-20) megabytes of the truncated one, I might find the cause of the problem (or I might not, your mileage might vary).

[Vincent14]

I deleted the file, sorry :/