[FFmpeg-user] bad snapshot-quality from avchd-videofile

[Andy Furniss]

scenator wrote:
> Hello,I need your help again...The Quality of /all/ extracted snapshot (from
> a HD-videofile) isn't acceptable, please watch the result:
> <http://ffmpeg-users.933282.n4.nabble.com/file/n4664636/Snapshot_1.jpg>
> C:\ProgramData\ffmpeg.exe -i "d:\Temp\STOP!1~1.M2T" -y -s 1920x1080 -ss
> 00:00:01.20 -vframes 1 C:\Users\Frank\AppData\Roaming\Snapshot_1.jpgThere is
> no difference in quality by calling ...\Snapshot_1.bmp (6MB)

The source is interlaced so you are getting a weaved frame.

Try with a deinterlacer eg. -vf yadif=1

With the =1 yadif will produce one frame per field so you will have x2 
frames to choose from.