[FFmpeg-user] vertical lines noise in scaled raw video.

Carl Eugen Hoyos cehoyos at ag.or.at
Wed Nov 9 17:06:52 CET 2011

Dennis <mediastream <at> gmail.com> writes:

> Was converting MPEG2 to H,.264 noticed that video has faint but persistent
> vertical lines top to bottom. It's not extremely noticeable, but gets very
> annoying as lines stay in one place and 'burn in' after a while.
> Playback: QuickTime, VLC and FFplay media players.
> Encoding: FFmpeg 0.8.6 release with latest libx264 (Nov 5th tar ball).
> Source file:http://www.mediafire.com/?khrzaps202b1ksq
> FFmpeg & libx264: http://www.mediafire.com/?3fkyzo1oh5d6l72
> X264 encode(y4m to H264): http://www.mediafire.com/?g8x2ww1rcwhm08k
> y4m file (scaled to 800x448 by ffmpeg):
> http://www.mediafire.com/?y8cvvk07r1vegna

Since I don't see any obvious red lines:
Which files show red lines with FFplay/MPlayer (can QuickTime really play raw
H264?), which do not?
Are the red lines also reproducible with
ffmpeg -i file -ss 35 out.png / out.jpg?

Carl Eugen

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