Master nexus 5

[fredericgermain]

Hi Federico,

I worked a little to make untrunc work on a mp4 that my nexus 5 recorded.

It actually didn't work because of the SHANE fix that I still had...
Anyway, I made some fix dev, which might be interesting :

• update untrunc.pro to use pkgconfig or static lib depending on flag
• allow to save a file with a given mdat atom position : this allow to compare a file processed with untrunc with the original file more easily
• last chunk was not well processed
• fix for file more than 2GB (but lower than 4GB...)
• write a series of patch to make the data in stsz, stsc, stco, stts the same as generated by nexus.
  -> it groups consecutive chunk of data of the same track together.
  I'm not sure it's necessary though, it might make files smaller.
• fix fixTimes. if reference file is shorter, we were copying the reference times several time. but the first time duration on nexus is larger than the other ones, so it make the sound go faster... I just use the time duration of the 2nd chunk in loop

Hope you can have a look and most of them are mergeable

[ponchio]

Ciao, nice work. I will integrate them as soon as I can :)

Federico

Hi Federico,

I worked a little to make untrunc work on a mp4 that my nexus 5 recorded.

It actually didn't work because of the SHANE fix that I still had...
Anyway, I made a fix dev, which might be interesting :

• update untrunc.pro to use pkgconfig or static lib depending on flag
• allow to save a file with a given mdat atom position : this allow to
  compare a file processed with untrunc with the original file more easily
• last chunk was not well processed
• fix for file more than 2GB (but lower than 4GB...)
• write a series of patch to make the data in stsz, stsc, stco, stts the
  same as generated by nexus. -> it groups consecutive chunk of data of the
  same track together. I'm not sure it's necessary though, it might make
  files smaller.
• fix fixTimes. if reference file is shorter, we were copying the
  reference times several time. but the time duration on nexus is larger than
  the other ones, so it make the sound go faster... I just use the time
  duration of the 2nd chunk in loop

Hope you can have a look and most of them are mergeable

You can view, comment on, or merge this pull request online at:

#53
Commit Summary

• build: system_libav flag (link with system libav)
• saveVideo with mdat offset
• detect last chunk of data
• untrunc: update makefile (qmake-qt4 on fedora 23)
• support for files > 2GB and < 4GB
• track: remove verbose
• enhanced chunk analysis
• saveSampleTimes: enhanced stts reconstruction
• fixTimes: use only 2nd time entry
• track: write each nal separately in stsz

File Changes

• M Makefile https://github.com/ponchio/untrunc/pull/53/files#diff-0
  (170)
• M README.md https://github.com/ponchio/untrunc/pull/53/files#diff-1
  (10)
• M atom.cpp https://github.com/ponchio/untrunc/pull/53/files#diff-2
  (4)
• M mp4.cpp https://github.com/ponchio/untrunc/pull/53/files#diff-3
  (27)
• M mp4.h https://github.com/ponchio/untrunc/pull/53/files#diff-4
  (3)
• M track.cpp https://github.com/ponchio/untrunc/pull/53/files#diff-5
  (118)
• M untrunc.pro
  https://github.com/ponchio/untrunc/pull/53/files#diff-6 (23)

Patch Links:

• https://github.com/ponchio/untrunc/pull/53.patch
• https://github.com/ponchio/untrunc/pull/53.diff

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#53