[FFmpeg-user] Conversion to mp4 container

[Ankuj Gupta]

But when viewed through Hex Editor there is difference in between the video
elementary stream given as input and the one extracted from mp4




On Fri, Apr 29, 2011 at 12:36 PM, Andrew Berg <bahamutzero8825 at gmail.com>wrote:

> On 2011.04.29 01:46 AM, Ankuj Gupta wrote:
> > ffmpeg -i test043.avi -vcodec copy -an test043.avi.mp4
> >
> > I am assuming that it will use the same codec for video as it is present
> in
> > the mpeg4 file. Is my assumption correct or first ffmpeg will decode it
> and
> > then re encode it again ?
> If you tell FFmpeg to copy the video stream, it will do so. FFmpeg can't
> reencode if you don't specify a codec anyway (it wouldn't know what to do).
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