[FFmpeg-user] xVid and version Q

[Jim Shupert]

On 5/13/2011 12:57 PM, Etienne Buira wrote:
> On Fri, May 13, 2011 at 09:57:23AM -0400, Jim Shupert wrote:
>>
>> On 5/12/2011 5:50 PM, Jim Shupert wrote:
>>>   Friends,
>>>
>>> I made a file with ffmpeg [ -vcodec libxvid ]
>>>
>>> ffmpeg -i D:\path\vid\my.mpg -ab 192000 -ar 48000 -b 8000000 -s 720x480
>>> -vcodec libxvid  -acodec libmp3lame D:\path\vid\my.avi
>>> ( and file looks fine - plays in VLC , wonderful )
>>>
>>> when I analyze a file with Gspot it repots the file video codec to be
>>> xvid ISO MPEG-4. ISO
>>> I think this is xvid 1.3.1 .
>>> when i examine with media info or ffprobe it simply says Codec:xvid.
>>>
>>> What are the major differences between
>>> xvid 1.1.2  and xvid ISO MPEG-4. ISO?
>>>
>>>
>>> If i wish to provide a person Xvid 1.1.2 can I get that older codec
>>> version or would it be suggested to have the person update thier
>>> player codecs.
>>>
>>> They are asking for Xvid 1.1.2  is this a reasonable request isn't it
>>> just older - don't ya think they could just update their codec?
>>>
>>> Simply said is the file I made with ffmpeg [-vcodec libxvid ] simply a
>>> newer version of xvid 1.1.2 or is something fundamentally different.
>>>
>>> Thanks much
>>>
>>>
>> is there any reason to think that the file made with -vcodec libxvid
>> { that i think is Xvid 1.3.1 isn't that true ? }
>> would not be backward compatible to xvid 1.1.2 ?
>> meaning play ok in any player that can play xvid1.1.2
>>
>>    i did some googling -- and i current think
>> -vcodec libxvid  = =  XviD 1.3.1 = = xvid ISO MPEG-4. ISO -------is that
>> true?
>> and
>> those files should play in anything that plays xvid 1.1.2
>>
>> any wisdom would be appreciated -
> Hi.
>
> Actually, you have to distinguish two things:
> 1. The bitstream format, here you are talking about mpeg 4 part 2
> 2. The software that outputs a bitstream, taking raw input and
>     compressing it the best it can (in parameters limits) to compress it
>     using the bitstream format constructs. xvid stands here.
>
> So, it should be as simple as "use divx/xvid/whatever" to encode, and
> use whatever mpeg4part2 decoder to play. This is often true.
> _______________________________________________
>
Thank you for your reply -- i do appreciate it.
and I follow what you state here.

simply said here is my challenge.
I have made files for a fellow who looks at them in gSpot and sees

xvid ISO MPEG-4. ISO   not  xvid 1.1.2
I contend that what i made is xvid 1.3.1 and that is even better.
Am i incorrect about that ? isn't the files made via  -vcodec libxvid using the  codec known as xvid 1.3.1 and isn't that backwards compatible with xvid1.1.2.
actually even better?

Thanks again!