[FFmpeg-user] ffmpeg treats m4v as container not elementry video format

[Yogesh Tyagi]

I tried to extract video elementary stream from a 3gp file

./ffmpeg -i Nachde+Punjabi-Ajab+Gazabb+Love.3gp -vcodec copy temp.m4v
ffmpeg version N-31423-g896e597, Copyright (c) 2000-2011 the FFmpeg developers
  built on Dec 21 2012 16:44:03 with gcc 4.4.5
  configuration: --enable-libx264 --enable-gpl --enable-static --disable-shared
  libavutil    51. 11. 0 / 51. 11. 0
  libavcodec   53.  7. 0 / 53.  7. 0
  libavformat  53.  5. 0 / 53.  5. 0
  libavdevice  53.  2. 0 / 53.  2. 0
  libavfilter   2. 24. 4 /  2. 24. 4
  libswscale    2.  0. 0 /  2.  0. 0
  libpostproc  51.  2. 0 / 51.  2. 0


Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Nachde+Punjabi-Ajab+Gazabb+Love.3gp':
  Metadata:
    major_brand     : 3gp6
    minor_version   : 256
    compatible_brands: isom3gp6
    creation_time   : 2012-10-17 15:07:41
  Duration: 00:02:53.58, start: 0.000000, bitrate: 227 kb/s
    Stream #0.0(und): Video: mpeg4, yuv420p, 320x180 [PAR 1:1 DAR
16:9], 193 kb/s, 24 fps, 24 tbr, 24 tbn, 24 tbc
    Metadata:
      creation_time   : 2012-10-17 15:07:41
    Stream #0.1(und): Audio: aac, 22050 Hz, mono, s16, 31 kb/s
    Metadata:
      creation_time   : 2012-10-17 15:07:41
File 'temp.m4v' already exists. Overwrite ? [y/N] y
Output #0, ipod, to 'temp.m4v':
  Metadata:
    major_brand     : 3gp6
    minor_version   : 256
    compatible_brands: isom3gp6
    creation_time   : 2012-10-17 15:07:41
    encoder         : Lavf53.5.0
    Stream #0.0(und): Video: mpeg4, yuv420p, 320x180 [PAR 1:1 DAR
16:9], q=2-31, 193 kb/s, 24 tbn, 24 tbc
    Metadata:
      creation_time   : 2012-10-17 15:07:41
    Stream #0.1(und): Audio: aac, 22050 Hz, mono, s16, 64 kb/s
    Metadata:
      creation_time   : 2012-10-17 15:07:41
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Press [q] to stop, [?] for help
frame= 4166 fps=1326 q=-1.0 Lsize=    5492kB time=00:02:53.54 bitrate=
259.2kbits/s
video:4108kB audio:1321kB global headers:0kB muxing overhead 1.165175%

when I tried to see what went inside transcoded file I was surprised
to see both audio as well video in m4v file:

root at yogesh-desktop:~/ffmpeg_git/ffmpeg# ffmpeg -i temp.m4v
ffmpeg version 0.9, Copyright (c) 2000-2011 the FFmpeg developers
  built on Dec  6 2012 19:13:59 with gcc 4.4.5
  configuration: --enable-libx264 --enable-gpl
  libavutil    51. 32. 0 / 51. 32. 0
  libavcodec   53. 42. 0 / 53. 42. 0
  libavformat  53. 24. 0 / 53. 24. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 53. 0 /  2. 53. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'temp.m4v':
  Metadata:
    major_brand     : M4V
    minor_version   : 512
    compatible_brands: isomiso2
    creation_time   : 1970-01-01 00:00:00
    encoder         : Lavf53.5.0
  Duration: 00:02:53.58, start: 0.000000, bitrate: 259 kb/s
    Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v /
0x7634706D), yuv420p, 320x180 [SAR 1:1 DAR 16:9], 193 kb/s, 24 fps, 24
tbr, 24 tbn, 24 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 22050 Hz, mono,
s16, 62 kb/s
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    :
At least one output file must be specified

What format should I use so that I get mpeg4 video elementary stream.

Thanks,
Yogesh