[vlc-devel] A simple container format

[Peter Tap]

Hi Kaarlo,

Thank you very much for your help.

Is there a way to batch-extract the metadata from mp4 using vlc?

Also, is there a way to batch-extract raw AAC and H.264 streams (without transcoding) into their respective files?


Regards,
Peter



________________________________
From: Kaarlo Räihä <kaarlo.raiha at gmail.com>
To: Mailing list for VLC media player developers <vlc-devel at videolan.org>
Sent: Tuesday, August 23, 2011 11:06 AM
Subject: Re: [vlc-devel] A simple container format


2011/8/23 Peter Tap <ptrtap at yahoo.com>

Folks,
>
>
>For my project, I need to build a custom container as a proof of concept. The container will have just one H.264 video stream and one AAC audio stream. I will write a vlc demux to deal with this container file.
>
>
>
>To keep things simple, the container format I am thinking is:
>1. First 8 bytes contain the location for the start of audio stream.
>2. Video stream follows.
>3. Audio stream follows.
>
>
>
>I have a sample .mp4 file. I will strip video and audio data from this 
mp4 file and create my container. Let's call it sample.my4. I will wire ".my4" extension into vlc.
>
>
>
>I don't know much about the internals of x264 or AAC, and I am hoping I don't need to. However, I am not sure if stripping just audio and video streams are enough. Do I need to strip any other metadata from the original mp4 file? I guess for now it is okay if the user cannot do random seek.
>

Resolution, FPS, aspect ratio, duration etc. might be something you want to keep in container. 
 

>
>Thank you in advance for your help.
>
>
>Regards,
>Peter
>
>
>
>
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