[FFmpeg-user] This strea is something else ?

[Bazza]

On Sat, 13 Jul 2013 02:44:28 +0000 (UTC), Carl Eugen Hoyos
<cehoyos at ag.or.at> wrote:

>Bazza <lamia <at> jeack.com.au> writes:
>
>> >    Stream #0:0[0x1bf]: Data: dvd_nav_packet
>
>I am not sure I understand:
>Do you think your stream does not contain any dvd_nav 
>packets? Or would you just prefer if ffmpeg shows the 
>streams that you like it to show but does not show the 
>streams that you would prefer not to see?

No, I'm happy enough about the recognition and display of the stream.
I'm questioning the "why" of FFMPEG classifying the (0x1bf) stream as
being stream 0 which is exactly what it was doing in my initial post.
I had always thought the term #0:0 -always- meant the video stream.
Would it be the case that FFMPEG concentrates its  attention on the
[0x1e0] ... type of description (that sounds muddled I know).

e.g. 

Here's the O/P from a dvd vob file using current FFMPEG (Win)
Note that #0:0 _IS_ a video etc and that the nav_packet is placed last
All well and good to my expectations and way of thinking

Input #0, mpeg, from 'e:\saturdays\kw.vob':
  Duration: 00:10:59.62, start: 3660.168000, bitrate: 6568 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576
             [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
    Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
    Stream #0:3[0x1bf]: Data: dvd_nav_packet
---------------------------------------------------------------------------
But in contrast, my initial post shows a stream as below

Input #0, mpeg, from 'z:\video_ts\vts_01_1.vob':
  Duration: 00:09:10.19, start: 0.228544, bitrate: 5743 kb/s
    Stream #0:0[0x1bf]: Data: dvd_nav_packet     <<<< This bit here -)
    Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576
            [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:2[0xa0]: Audio: pcm_s16be, 48000 Hz, 2 channels, s16,
1536 kb/s

The streams are what ... misnamed ...? This confuses me
especially if I'm a habit of re-mapping particular expected 
streams - only to find out they've been called something else.
So. I'm just seeking enlightenment.


>> PS: Is it valid to post FFPROBE output here?
>ffprobe output, yes.

Ok. I'm comfortable with that -) Just wanted to know.