[MPlayer-users] [bug] Bug encoding PNG files with -ovc lavc.

[wieserw at informatik.uni-muenchen.de]

It seems there is a bug in mencoder (0.90rc4) when encoding multiple
PNG files using -ovc lavc.

Create some PNG files (320x240) and try encoding them using

mencoder -mf on:w=320:h=240:fps=25:type=png -ovc lavc -lavcopts
vcodec=mpeg4 -o film-lavc.avi "f00*.png"

The result will be a strangely disorted image:
the rightmost 25% of the image stay black, the rest appears grey
with vertical lines. No compression artifact, this is actually
a bug in mencoder, probably in RGB -> YUV conversion
(because encoding JPG files instead of PNG works fine).

Note: encoding the same PNG files with -ovc divx4 has no problems.

Please check that.

Please CC me as I'm not subscribed.


----------<snip>--------
Opening video filter: [expand=-1:-1:-1:-1:1]
Expand: -1 x -1, -1 ; -1  (-1=autodetect) osd: 1
==========================================================================
Opening video decoder: [mpng] PNG Images decoder
Selected video codec: [mpng] vfm:mpng (PNG images decoder)
==========================================================================
Writing AVI header...
VDec: vo config request - 640 x 480 (preferred csp: BGR 24-bit)
Could not find matching colorspace - retrying with -vop scale...
Opening video filter: [scale]
VDec: using BGR 32-bit as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 1
SwScaler: reducing / aligning filtersize 9 -> 8

SwScaler: BICUBIC scaler, from BGR 32-bit to Planar YV12 using MMX2
videocodec: libavcodec (640x480 fourcc=58564944 [DIVX])
----------------