or “catchy post title #189”.
I generate the WMV version of our LUG talk videos using ffmpeg. In order to produce a higher quality version of a recent talk, I wanted to create the WMV at full PAL resolution, using a relatively high video bitrate of 900kbps. So, I took the MPEG2 file and ran:
ffmpeg -i input.mpeg -vcodec wmv2 -b 900 -acodec mp3 output.asf
At bit-rates over 600kbps on the large files, I get strange artefacts in the video – blocks missing, strange “deja-vu” repeats. At the same resolution at lower bitrates, it’s not a problem. Even a different MPEG2 (recorded using the same DV camera and processed in the same way) doesn’t have the problem. This is very odd. Does anyone have any ideas?Pin It