[FFmpeg-user] Mux encoded video data directly into mp4 files

[fernando.takeshi]

Hello,

I've been searching for ways to create .mp4 files directly from saved raw
video data. The sources of said data can record frames in the h264, mpeg and
mjpeg formats; I end up with files that are basically raw frames of these
formats, one after the other.

Now, I've tested the command line approach (that I cannot use,
unfortunately) and it seems to work for h264 and mpeg files, but not for
mjpeg. I need to do this programmatically; so I've followed ffmpeg's muxing
example and many others I found online (stackoverflow, etc) and can't seem
to find any consistency in how to (or what would be the correct way to)
accomplish this.

Right now, I do not have any sample code working - the muxing example
generates a divide by zero error on av_write_frame (I tried messing with
DTS/PTS but nothing seems to work). Other examples all yielded different
results, but none worked.

So, what I ask is basically: given a file consisting of raw frames (h264,
mpeg or mjpeg), how do I go about creating a playable video mp4 file? What
would be the correct way? Specifically speaking, which functions should I be
calling and in what order as to make the code work for those three formats?

Some sample data can be found at
https://drive.google.com/file/d/0B8XSlN4yAH72T1R0Ti1zaGViNmM/edit?usp=sharing

Thanks in advance!



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