Re: [Opensvcdecoder-support] is it a bug??? while using mplayer with opensvc 1.12

[Médéric B. <mbl...@gm...>]

HI,


Why don't you use command line to force the decoding process on the base
layer instead of modying the source code?

./mplayer -fps 25 filename -setlayer 0


If you still want to change the code, you can set h -> CurrDqId to 0.

Regards,
Médéric


2011/12/9 Shuaijun Zhang <sz...@re...>

> Hi there,
>
> I changed the mplayer code to force the opensvc decoding the basic layer
> only. But seems it can't work. No picture is decoded.
> I tested it with the video_5 in opensvc sourceforge and my newly encoded
> video (with the configuration files from opensvc). The results are same.
>
> I changed the code in the file of libavcodec/h264c in mplayer to make sure
> the opensvc is decoding the basic layer only. The code is as below.
> let me know if I am doing something wrong or it is the bug in the opensvc
> decoder, or the svc video is not correct...
> thank you
> Jason
>
>
> /**
> Parse and execute the command.
> Layer Up, Layer Down, ...
> */
> static void ParseCmd(H264Context *h){
>
> if(Temporal != -1){
> //Only mplayer
>  //specific temporal_id asked at the beginning
> //av_log(h->s.avctx, AV_LOG_ERROR,"Specifi TemporalId %d %d %d\n", &h ->
> CurrDqId, h -> TemporalCom, h -> TemporalId);
>  UpdateLayer(h -> DqIdTable, &h -> CurrDqId, &h -> TemporalCom, &h ->
> TemporalId, SavedTemp, Temporal);
>  //av_log(h->s.avctx, AV_LOG_ERROR,"Specifi TemporalId %d %d %d %d\n",
> SavedTemp, Temporal, h -> TemporalCom, h -> TemporalId);
>  Temporal = -1;
> }
>
> if(SnrSpatial != -1){
>  //av_log(h->s.avctx, AV_LOG_ERROR,"%d %d %d %d Curr %d Max %d Command
> %d\n", h -> DqIdTable[0], h -> DqIdTable[1], h -> DqIdTable[2], h ->
> DqIdTable[3], h -> CurrDqId, h -> MaxDqId, SnrSpatial);
>  if(SnrSpatial == 3){
> //Mplayer specific option
>  //Used as the MaxDqId was equal to SavedId
> *UpdateLayer(h -> DqIdTable, &h -> CurrDqId, &h -> TemporalCom, &h ->
> TemporalId, SavedId, 2);  // This line is always executed while I test
> it. I changed the **SavedId to 0, so that the decoding layer  is always
> basic layer (layer 0) *
>  }else{
> UpdateLayer(h -> DqIdTable, &h -> CurrDqId, &h -> TemporalCom, &h ->
> TemporalId, h -> MaxDqId, SnrSpatial);
>  }
> SnrSpatial = -1;
>  }
> }
>
>
>
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