[FFmpeg-user] FFmpeg problem in Mac
Carl Eugen Hoyos
cehoyos at ag.or.at
Fri Jun 14 10:16:37 CEST 2013
Vladimir Espinosa Angarica writes:
> I'm running Mac OS X 10.8.3 and installed the latest
> version of FFmpeg 1.2.1
This is not the latest version (it is actually starting
to get old).
> I'm having problems generating a video from a group of
> PNG images. The video is generated, apparently without
> functioning complaints (please see the log attached)
> but nothing is shown when you try to open the video,
> exactly the video viewer is able to open it, and play
> it, but only a black window is shown.
Which player did you test?
Is the player maybe broken and cannot show anything else
than yuv420p? I use MPlayer and I usually suggest vlc.
> But probably the bigger oddity is that, three months ago,
> probably with a previous version of FFmpeg, I was able
> to create the video without problems.
Yes, such a bug was fixed, in older versions, pix_fmt
choice was a little random.
User -pix_fmt yuv420p
Since you did not specify a pixel format, ffmpeg has to
choose one. Your input is rgb (which is not supported by
the encoder), to loose as little quality as possible, it
The video players installed on your system are very old-
fashioned and do not support decoding yuv444p in h264.
PS: Thank you for the sample!
There may be a bug in ffplay which also fails here to
decode the sample you uploaded (ffmpeg, MPlayer and vlc
all work fine).
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