[MPlayer-users] Slave mode: set_property time_pos syntax?

[Kevin DeKorte]

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Phil Rhodes wrote:
> As part of my use of slave commands, most of which work fine, I'm attempting 
> to give my users the option to skip part of the file by sending a 
> "set_property time_position x" command to mplayer just after I "load 
> filename.avi". Although I'm sending a lot of get_time_position updates at 
> the time, all of which work fine, when I send the set_property command, 
> absolutely nothing appears to happen. Here's a snippet of logging produced 
> by my frontend, where "sent" is what I'm sending to mplayer, and "read" is 
> what I'm getting back:
> 
> Fri Jul 27 13:03:57 UTC+0100 2007 : Sent: get_time_pos
> Fri Jul 27 13:03:57 UTC+0100 2007 : Read: ANS_TIME_POSITION=6.1
> Fri Jul 27 13:03:58 UTC+0100 2007 : Sent: set_property time_pos 30
> Fri Jul 27 13:03:58 UTC+0100 2007 : Sent: get_time_pos
> Fri Jul 27 13:03:58 UTC+0100 2007 : Read: ANS_TIME_POSITION=6.3
> 
> ...no joy. I'd expect to see the reported time position leap to 30 (and the 
> playback as well, of course). I suspected that this might be due to my using 
> compressed files with large gaps between keyframes, on the assumption that 
> mplayer might not be able to seek to a keyframe that's nearer thirty seconds 
> than I am already. So, I tried it with an uncompressed AVI, every frame 
> therefore being a keyframe, but the behaviour didn't change.

Have you tried the seek slave command. It is documented in
DOCS/tech/slave.txt. I find that it works.

Kevin

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