[FFmpeg-devel] [RFC] Unplayable yuv422p libx264 output

David Rice daverice at mac.com
Fri Feb 17 02:04:03 CET 2012

On Feb 16, 2012, at 7:19 PM, Stefano Sabatini wrote:

> On date Thursday 2012-02-16 20:46:12 +0100, Boštjan Strojan encoded:
>> On Thu, Feb 16, 2012 at 8:02 PM, Stefano Sabatini <stefasab at gmail.com> wrote:
>>> Hi,
>>> the following command generates an MP4 file which can be played by
>>> ffplay but results in corrupted video when playing it with
>>> mplayer/vlc/quicktime:
>>> $ ffmpeg -f lavfi -i testsrc -vcodec libx264  -pix_fmt yuv422p  -y out422p.mp4
>>> Any idea?
>> on OS X, vlc 2.x (nigtly builds - http://nightlies.videolan.org/) and
>> MPlayerX (i think thats mplayer2 based) can play 10bit 4:2:2 h.264
>> stuff (also lossless variant).
>> Latest beta versions of adobe flash should work as well as reported by
>> some users.
>> No idea about quicktime.
> Weird, it seems to affect older versions of VLC/Mplayer, or at least
> the versions shipped with Debian.

Support for 10 bit h264 decoding (and most 10 bit decoding) is a fairly recent feature in VLC. See: http://www.videolan.org/developers/vlc/NEWS.
Dave Rice

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