[Little_Kitty]

but i tried to play a Xvid video and the quality was very bad all blocks in the video etc Which normally looks like its wrongly encoded but with 621 they played just fine.

I've had a test. xvid is generally fine, but I suspect your video has GMC which can't be hardware decoded. Look for something like this in mediainfo:

Code:

Format settings, GMC                     : 3 warppoints

We should we automatically switching to software decode for GMC, but I suspect an fffmpeg change has stopped that working. I'll look into it.

Thank you.
it seems that something changed in FFmpeg 3.1 that makes the video go "bad" it still plays but a lot of artifacts.

It's true the video's i tried are quite old ( Anime ) But there arnt really any other version of these files which have better quality.
here is some info on the file not sure if you need it or can use it

Format : MPEG-4 Visual
Format profile : Advanced Simple@L5
Format settings, BVOP : 2
Format settings, QPel : No
Format settings, GMC : 3 warppoints
Format settings, Matrix : Default (H.263)
Muxing mode : Packed bitstream
Codec ID : XVID
Codec ID/Hint : XviD
Duration : 24mn 49s
Bit rate : 823 Kbps
Width : 704 pixels
Height : 396 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 (23976/1000) fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.123
Stream size : 146 MiB (86%)
Writing library : XviD 1.2.1 (UTC 2008-12-04)

it works again nicely in #0628.