[MPlayer-users] vo issue with 422 h264

[Andy Furniss]

Reimar Döffinger wrote:
> On 23.01.2014, at 18:50, Andy Furniss <adf.lists at gmail.com> wrote:
>> While testing something I made an h264 422 vid with ffmpeg/libx264.
>>
>> On playback I notice that the vo is saying YV12, testing with an old mplayer this does not happen and the vo gets fed 422.
>>
>> full -v outputs below current then old, the relevant parts -
>>
>> Current -
>>
>> VDec: vo config request - 1920 x 1080 (preferred colorspace: Planar 422P)
>> Trying filter chain: vo
>> VDec: using Planar YV12 as output csp (no 0)
>> Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
>> VO Config (1920x1080->1920x1080,flags=0,'MPlayer',0x32315659)
>> VO: [gl] 1920x1080 => 1920x1080 Planar YV12
>>
>> Old -
>>
>> VDec: vo config request - 1920 x 1080 (preferred colorspace: Planar 422P)
>> Trying filter chain: vo
>> VDec: using Planar 422P as output csp (no 5)
>> Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
>> VO Config (1920x1080->1920x1080,flags=0,'MPlayer',0x50323234)
>> VO: [gl] 1920x1080 => 1920x1080 Planar 422P
>
> And both _look_ correct?
> Asking because there is nothing about a scale filter being selected.
> In fact what it seems to say is that originally the decoder claimed 422 but when MPlayer asked again it changed its mind to actually wanting 420...
> I can think of one related change, though I can't imagine how it would cause this.

Both look correct.

Further testing looks like this is an h264 issue, I can reproduce with 
another sample I have that is not made by me/ffmpeg.

I also have a mpeg2 422p stream which does not have the issue.

Raw 422p also works OK (well mplayers raw422P has another issue with u/v 
reversal, but -vc ffraw422p is correct and both result in 422p output).