Worries with a video converter

[WazaKrash]

Hello, I need your help to clarify a worry that I have for quite a time, please.

Recently, I noticed that when I converted a video with Free Make Video Converter, the result seems a bit damaged compared to the original.
You know, kind of video seems a bit choppy or jaded or there has as small grains above.
Whereas before I didn't have this problem, the video remained identical to the original, it doesn't have damage.

Do you have any idea of the cause of this problem?

I thought it was maybe because the version was outdated, but I have version 4.1.5.4 and on their site, the latest version is the 4.1.5.

Maybe because I have recently installed new codecs?

Yet when I converted and I set the file size, I don't take a value too low. Moreover the software imposes a limit, for example between "600 and 1334 Mb" so it's not possible to go lower or higher than that.

[Baldrick]

I doubt freemake use external codecs and don't think they have changed video encoders(probably ffmpeg).

Are you converting to same framerate as your video source?

Or wHy not try another converter and see how it looks like? Like handbrake or vidcoder for to mp4,mkv conversions.

[WazaKrash]

Yeah I already use others converters but I really like Free Make and before there was not this problem.

I used format factory, super or handbrake etc, no problem with them.

But I like use FM video converter because it's fast, it is simple and I prefer to use it to put subtitles on videos etc.

Normally, it convert to same framerate because I click to "same source" when I start the conversion
but I will try to better check this part, since you made me think.