[MPlayer-dev-eng] dvdnav second installment, help needed

[David Holm]

Ivan Kalvatchev wrote:

>--- Arpi <arpi at thot.banki.hu> wrote:
>
>>Hi,
>>
>>>As you can see in stream.c dvd menus support something called still pictures. 
>>>This is used commonly in menus to provide a still background. A still picture 
>>>is basically preceeded by an mpeg ps stream which contains a video packet 
>>>with the picture incoded as intra (I assume ;). This is where I need help, 
>>>when the demuxer get's a still picture it currently freaks out since it's 
>>>preceeded only by audio. The demuxer kills mplayer telling me there are too 
>>>many audio packets in the buffer. I understand why this happens but I've been 
>>>unable to make a clean implementation to solve this.
>>>
>>clean...
>>
>>do you know a clean way to detect still pictures? i mean, there is info
>>about them in IFO file, or PS/ES header etc ?
>>xine guys are working on this issue for months, with no full success yet.
>>from their mailing it seems to no clean way, just some heuristics. but i
>>don't like to introduce such thing ni mplayer. they play with PTS and DTS
>>differences,. but it's too messy, and sometimes break non-dvd content.
>>
>>second prob: most mplayer libvo drivers use double buffering.
>>so decoded still pic in decoder buffer won't be displayed until next picture
>>is decoded... it can be solved only with big mess, or ... libvo2.
>>
>>>So could someone help me out and have a look at the demuxer to allow it to 
>>>receive only audio (and only video since this is also allowed by the 
>>>
>>audio only not supported by mplayer core.
>>maybe, a possible ugly mess is repeating video frame...
>>
>>
>>A'rpi / Astral & ESP-team
>>
>What's going on,there does thay came from? Could you add more details?
>
Everything is muxed into a 2048byte big mpeg ps packet that you get.