How to convert multiple format videos to *.mp4 files which can be played on my iPod

kcynice · 10-18-2008, 10:27 PM

How to convert multiple format videos to *.mp4 files which can be played on my iPod? I have searched on google, but didn't get a working way. So, if i want to convert some videos to my iPod to watch, i have to restart my computer and boot my windows system which i rarely use it, that's not want i want. I really want to do it on my slackware!

Regards.

billymayday · 10-18-2008, 10:31 PM

Here's what I use

Quote:

ffmpeg -i input -acodec libfaac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X output.mp4

I still use itunes to load it though

kcynice · 10-18-2008, 10:59 PM

Quote:

Originally Posted by billymayday

Here's what I use

I still use itunes to load it though

that's the output of mine:

Code:

kcynice@kcynice:~/Desktop$ ffmpeg -i sc081018.rmvb  -acodec libfaac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X output.mp4
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.
  configuration: --prefix=/usr --enable-shared --enable-gpl --enable-pp --enable-pthreads --enable-liba52 --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libogg --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --disable-debug
  libavutil version: 49.5.0
  libavcodec version: 51.44.0
  libavformat version: 51.14.0
  built on May  6 2008 17:26:44, gcc: 4.2.3
[NULL @ 0xb7d32730]Unsupported video codec
Input #0, rm, from 'sc081018.rmvb':
  Duration: 00:23:51.5, start: 0.000000, bitrate: 102 kb/s
  Stream #0.0: Video: RV30 / 0x30335652, 320x240, 79 kb/s, 12.00 fps(r)
  Stream #0.1: Audio: cook, 22050 Hz, mono, 20 kb/s
  Stream #0.2: Data: 0x0000
PIX_FMT_YUV420P will be used as an intermediate format for rescaling
Output #0, mp4, to 'output.mp4':
  Stream #0.0: Video: mpeg4 (hq), yuv420p, 320x180, q=2-31, 1200 kb/s, 12.00 fps(c)
  Stream #0.1: Audio: libfaac, 22050 Hz, mono, 128 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Unsupported codec (id=71) for input stream #0.0

it seems that, my ffmpeg doesn't support mpeg4 video format output?

billymayday · 10-18-2008, 11:01 PM

Why would you say that?

Quote:

Unsupported codec (id=71) for input stream #0.0

kcynice · 10-18-2008, 11:06 PM

Quote:

Originally Posted by billymayday

Why would you say that?

but, what's it really mean? I really don't know how to resolve it. Any ideas?

billymayday · 10-18-2008, 11:22 PM

What is the input?

kcynice · 10-18-2008, 11:33 PM

i used command like:

Code:

 ffmpeg -i sc081018.rmvb  -acodec libfaac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X output.mp4

my input file name is sc081018.rmvb. i don't know how to view more details about it. i just copied your command but replacing the input file

billymayday · 10-18-2008, 11:36 PM

That doesn't tell me what an rmvb file is. Surely you know something about what you are trying to convert.

billymayday · 10-18-2008, 11:40 PM

Although this does http://en.wikipedia.org/wiki/RMVB

kite · 10-18-2008, 11:50 PM

Maybe you could try mvpod, it is a graphical program.

billymayday · 10-18-2008, 11:56 PM

It looks to me after a quick read at the ffmpeg site that ffmpeg doesn't support rmvb. A web search suggests that mencoder does, but I'm unable to see any reference to rmvb on their site.

kite · 10-19-2008, 12:17 AM

http://sourceforge.net/projects/mvpod

kcynice · 10-19-2008, 12:24 AM

i have just tried mvpod but got an error:
[code]Because the MP4Box component is missing the operation could not be completed. Please install it and try again later.［/code]

i don't known why?
----------Added--------------------
it works well now. i just download and installed gpac from http://gpac.sourceforge.net. Then mvpod can go well.
Now i can convert my *.rmvb files to *.mp4 files can be played by my ipod now.
Thanks, all

The ONLY problem is that, mvpod is a java program so that it's very slow, very very slow.
So, i select converting *.rmvb to *.avi(use mencoder) as conjunction, then converting the *.avi to *.mp4

kcynice · 10-21-2008, 07:00 AM

my final resolution is:

Code:

mencoder -o temp.avi -ovc lavc -oac mp3lame input.rmvb
ffmpeg -i temp.avi -vcodec libxvid -b 500k -acodec libfaac -ab 128 output.mp4

i have tested it on my 6gen iPod, witch supports fitting screen settings so i needn't specify the screen width and height of the output file.