[MPlayer-users] jpeg to avi has blank frames and sticks to first frame

[Philip Walden]

Philip Walden wrote:

> I am trying to covert jpeg images from my webcam into a movie using 
> the following command.
>
> mencoder mf://\*.JPG -mf fps=4:type=jpg -ovc lavc -lavcopts 
> vcodec=mpeg4 -oac copy -o output.avi
>
> It processes 152 files (IMAGE.00000.JPG - IMAGE.00152.JPG). See 
> mencoder output below.
>
> However, there are two problems:
>
>   1. between each frame there is a short "black or blank" frame.
>   2. mplayer replays the first image over and over for the duration of
>      the movie
>
> I can't seem to spot the problem

Somehow I think this is related to a problem with the mf://\*.JPG 
specification.

I now have nearly a 1000 jpegs.

The first 100 frames of the rendered movie seem to alternate between a 
the first and a blank frame, then it switches to alternating between the 
first and a frame much further along. As the movie progresses, the 
frames slowly change but always are out of order.

I had assumed the mf://\*.JPG would select jpegs in sorted order. Is 
this a bad assumption? If so, how does one specify the order?



>
> ==================================================================
>
> MEncoder 1.0pre4-RPM-3.2.2 (C) 2000-2004 MPlayer Team
>
> CPU: Advanced Micro Devices Athlon K75 Pluto,Orion 856.3 MHz (Family: 
> 6, Stepping: 1)
> Detected cache-line size is 64 bytes
> CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0
> Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx
>
> Reading /home/pwalden/.mplayer/codecs.conf: Can't open 
> '/home/pwalden/.mplayer/codecs.conf': No such file or directory
> Reading /etc/mplayer/codecs.conf: 66 audio & 176 video codecs
> File not found: 'frameno.avi'
> Failed to open frameno.avi
> Reading config file /home/pwalden/.mplayer/mencoder: No such file or 
> directory
> font: can't open file: /home/pwalden/.mplayer/font/font.desc
> font: can't open file: /usr/share/mplayer/font/font.desc
> success: format: 16  data: 0x0 - 0x0
> [demuxer] mf support.
> [mf] search expr: *.JPG
> [mf] number of files: 152 (608)
> [V] filefmt:16  fourcc:0x47504A49  size:0x0  fps: 4.00  ftime:=0.2500
> Opening video filter: [expand osd=1]
> Expand: -1 x -1, -1 ; -1  (-1=autodetect) osd: 1
> ========================================================================== 
>
> Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> Selected video codec: [ffmjpeg] vfm:ffmpeg (FFmpeg MJPEG decoder)
> ========================================================================== 
>
> Writing AVI header...
> ODML: Aspect information not (yet?) available or unspecified, not 
> writing vprp header.
> VDec: vo config request - 640 x 480 (preferred csp: Planar 422P)
> Could not find matching colorspace - retrying with -vf scale...
> Opening video filter: [scale]
> VDec: using Planar 422P as output csp (no 1)
> Movie-Aspect is undefined - no prescaling applied.
> SwScaler: reducing / aligning filtersize 1 -> 4
> SwScaler: reducing / aligning filtersize 1 -> 4
> SwScaler: reducing / aligning filtersize 1 -> 1
> SwScaler: reducing / aligning filtersize 9 -> 8
>
> SwScaler: BICUBIC scaler, from Planar 422P to Planar YV12 using MMX2
> videocodec: libavcodec (640x480 fourcc=58564944 [DIVX])
> Pos:  38.0s    152f ( 0%)   6fps Trem:   0min   0mb  A-V:0.000 [847:0]
> Writing AVI index...
> Fixing AVI header...
> ODML: vprp aspect is 4:3.
>
> Video stream:  847.082 kbit/s  (105885 bps)  size: 4023639 bytes  
> 38.000 secs  152 frames
> [
>
> _______________________________________________
> MPlayer-users mailing list
> MPlayer-users at mplayerhq.hu
> http://mplayerhq.hu/mailman/listinfo/mplayer-users
>