[MPlayer-advusers] ID_DEMUXER=nuv + ID_VIDEO_FORMAT=RJPG --> no picture ?!

[tormen at gmx.net]

Hi.

> > But is more likely that the information is missing in the RJPG part, 
> > because...
> > there is also the possibility to create .nuv files with DIVX inside with 
> > mythtv. And these files can be played with mplayer!
> > I appended file informations about such a file.

> There are some RTJpeg nuv files that play in MPlayer, too, e.g. the
> nirvana.nuv on our samples server.

Hmm. I tried to compare the two files: (my sample.nuv with the 
nirvana.nuv)

jolie / # nuvinfo /LINKS/TEMP/nirvana.nuv
Stream type 'nuv' is not an mpeg, and will
not work with this program.

Cleaning up temp files.
jolie / # mplayer -vo null -ao null -frames 0 -identify /LINKS/TEMP/nirvana.nuv
[...]
ID_DEMUXER=nuv
ID_VIDEO_FORMAT=NUV1

So there is no "ID_VIDEO_FORMAT=RJPG" ?

With which program was this nirvana.nuv file created?

> I don't think I will install MythTV with that huge amount of
> dependencies,
If I can help somehow? debug output, information, recordings?
Or maybe I can look through the source code, if you could maybe tell me 
for what I would have to look (roughly)? 

> but I should meet some people from MythTV at LinuxTag, so
> I hope we can make some progress there.
:-)) sounds great :-))


Greetings,

tormen.

---

> Greetings,
> Reimar Döffinger

> Index: libavcodec/nuv.c
> ===================================================================
> --- libavcodec/nuv.c	(revision 9144)
> +++ libavcodec/nuv.c	(working copy)
> @@ -168,6 +168,28 @@
>      return orig_size;
>  }

> +static uint8_t fallback_lquant[] = {
> +     8,  5,  5,  8, 12, 20, 25, 30,
> +     6,  6,  7,  9, 13, 29, 30, 27,
> +     7,  6,  8, 12, 20, 28, 34, 28,
> +     7,  8, 11, 14, 25, 43, 40, 31,
> +     9, 11, 18, 28, 34, 54, 51, 38,
> +    12, 17, 27, 32, 40, 52, 56, 46,
> +    24, 32, 39, 43, 51, 61, 60, 50,
> +    36, 46, 47, 49, 56, 50, 51, 49
> +};
> +
> +static uint8_t fallback_cquant[] = {
> +     8,  9, 12, 23, 49, 49, 49, 49,
> +     9, 10, 13, 33, 49, 49, 49, 49,
> +    12, 13, 28, 49, 49, 49, 49, 49,
> +    23, 33, 49, 49, 49, 49, 49, 49,
> +    49, 49, 49, 49, 49, 49, 49, 49,
> +    49, 49, 49, 49, 49, 49, 49, 49,
> +    49, 49, 49, 49, 49, 49, 49, 49,
> +    49, 49, 49, 49, 49, 49, 49, 49
> +};
> +
>  static int decode_init(AVCodecContext *avctx) {
>      NuvContext *c = avctx->priv_data;
>      avctx->width = (avctx->width + 1) & ~1;
> @@ -188,6 +210,13 @@
>      dsputil_init(&c->dsp, avctx);
>      if (avctx->extradata_size)
>          get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
> +    else {
> +        int i;
> +        for (i = 0; i < 64; i++) {
> +          c->lq[i] = (fallback_lquant[i] << 8) / 177;
> +          c->cq[i] = (fallback_cquant[i] << 8) / 177;
> +        }
> +    }
>      rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
>      return 0;
>  }

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