[FFmpeg-user] Conversion to mp4 container

[Ankuj Gupta]

The original stream has multiple Visual Object Sequence which have been
removed by ffmpeg.


On Fri, Apr 29, 2011 at 12:50 PM, Ankuj Gupta <ankuj2004 at gmail.com> wrote:

> 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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>
>