[MPlayer-users] Trouble mencoding a large DVB (1080i) grab

[Kichigai Mentat]

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On Nov 20, 2005, at 07.10, MichaelM wrote:

> Hey all.
> I've been using mencoder to transcode DVB grabs to avis, and it's been
> working just fine (will a little manual tweaking to get the -ss and
> -endpos numbers just right).
> Since seeking a TS is tricky, I convert the TS to a regular mpeg2 file
> as follows:
>
> mencoder dump.ts -oac copy -ovc copy -of mpeg -o dump.mpg
>
> Then I run through the stream with mplayer to get my start and endpos
> numbers (to cut out commercials), and then use mencoder again to  
> chop up
> the stream (with -ss and -endpos).
>
> I recently got a new harddisk, so am playing with large HDTV  
> streams. I
> grabbed 9GB worth (a bit more than an hour), and started doing my  
> thing.
          ^^^^
Did you enable Large Files (>2GB) support when you compiled MPlayer?   
That's all I can think of so far.
>
> Problem is (for both mplayer and mencoder), is that I cannot use -ss
> past 749.9 seconds (though 749.8 works fine). If I run the file  
> from the
> start, I can seek fine with the arrow keys, but specifying a number
> beyond 749.9, mencoder exits with the following:
>
> ********************************************************************** 
> **
>
> MEncoder dev-CVS-051120-23:08-3.2.2 (C) 2000-2005 MPlayer Team
> CPU: Advanced Micro Devices Sempron/Athlon MP/XP Thoroughbred; Duron
> Applebred (Family: 6, Stepping: 1)
> CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0
> Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE
>
> success: format: 0  data: 0x0 - 0xf6de9804
> MPEG-PS file format detected.
> VIDEO:  MPEG2  1440x1080  (aspect 3)  25.000 fps  90000.0 kbps  
> (11250.0
> kbyte/s)
> [V] filefmt:2  fourcc:0x10000002  size:1440x1080  fps:25.00   
> ftime:=0.0400
> ====================================================================== 
> ====
> Opening audio decoder: [liba52] AC3 decoding with liba52
> Using SSE optimized IMDCT transform
> AC3: 2.0 (dolby)  48000 Hz  384.0 kbit/s
> Using MMX optimized resampler
> AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000)
> Selected audio codec: [a52] afm: liba52 (AC3-liba52)
> ====================================================================== 
> ====
> PACKET SIZE: 2048 bytes
> videocodec: framecopy (1440x1080 24bpp fourcc=10000002)
> Building audio filter chain for 48000Hz/2ch/s16le -> 0Hz/0ch/??...
> audiocodec: framecopy (format=2000 chans=2 rate=48000 bits=16 B/ 
> s=48000
> sample-1)
> Writing AVI header...
> Limiting audio preload to 0.4s
> Increasing audio density to 4
>
> Writing AVI index...
>
> Overhead: inf% (2048 / 0)
> Fixing AVI header...
>
> Video stream:      nan kbit/s  (-2147483648 B/s)  size: 0 bytes  0.000
> secs  0 frames
>
> Audio stream:  384.000 kbit/s  (47999 B/s)  size: 1536 bytes  0.032  
> secs
>
> ********************************************************************** 
> *****
>
> All those nan's have me a bit worried...
I think nan is simply equivalent to NA. Look at the bitrate:  
- -2147483648 Bits per second. Total size: 0 bytes. Total length: 0.000  
seconds, 0 frames. It's doing nothing with the video. Seems to like  
the audio though...

Have you tried playing this in any other media players? Can MPlayer  
play the TS? Can MPlayer play right from the DVB system?
>
> _______________________________________________
> MPlayer-users mailing list
> MPlayer-users at mplayerhq.hu
> http://mplayerhq.hu/mailman/listinfo/mplayer-users

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