[FFmpeg-user] Why does encoding a file on different VM hosts result in different file size?

[Reindl Harald]

Am 17.08.2014 um 12:07 schrieb Peter B.:
> On 08/15/2014 06:46 PM, Moritz Barsnick wrote:
>> BTW, the codec being lossless doesn't mean the video size needs to be
>> the same, varying compression is certainly a feature.
> 
> You're right that lossless encoding can still have different filesizes -
> *but* depending on the encoding options [1].
> 
> I must admit that I also thought that if I'd use the same FFmpeg build,
> with FFV1 and the same encoding arguments, as well as the same video
> source, I'd get the same filesize.
> 
> Am I overlooking something?

how large is that difference?

there is *nowhere* defined that output files are
binary identical - lossless is about the content
and not about the binary file

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