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ephracis
April 21st, 2009, 10:55 AM
Ok, so now I have recorded some stuff using my webcam and Cheese. The format is of course ogg video (ogv). Don't know the actual codec, though.

As we all know there are no good video editing tools for Linux so I figured I would just put it on my Windows box and use Movie Maker. Well, Windows doesn't care for open formats, so Movie Maker can only use the common formats like avi, mpg, etc. So I need to convert my files.

I did some Googling and found, on this forums, people with the same problem.

It didn't work:


First some mencoder tips:

$ mencoder -idx input.ogv -ovc -lavc mp3lame -o output.avi
MEncoder 2:1.0~rc2-0ubuntu17 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Core(TM) Duo CPU T2350 @ 1.86GHz (Family: 6, Model: 14, Stepping: 12)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
Option ovc: Unknown suboption -lavc
Error parsing option on the command line: -ovc

Exiting... (error parsing command line)

Yeah, a command option that doesn't work. Dead stop there.

Next some ffmpeg magic:

$ ffmpeg -i input.ogv output.avi
FFmpeg version r11872+debian_3:0.svn20080206-12ubuntu3.1, Copyright (c) 2000-2008 Fabrice Bellard, et al.
configuration: --enable-gpl --enable-pp --enable-swscaler --enable-x11grab --prefix=/usr --enable-libgsm --enable-libtheora --enable-libvorbis --enable-pthreads --disable-strip --enable-libfaad --enable-libfaadbin --enable-liba52 --enable-liba52bin --enable-libdc1394 --disable-armv5te --disable-armv6 --disable-altivec --disable-vis --enable-shared --disable-static
libavutil version: 49.6.0
libavcodec version: 51.50.0
libavformat version: 52.7.0
libavdevice version: 52.0.0
built on Mar 13 2009 17:48:10, gcc: 4.3.2
Input #0, ogg, from 'input.ogv':
Duration: 00:14:10.6, start: 0.000000, bitrate: 1749 kb/s
Stream #0.0: Video: theora, 320x240 [PAR 0:0 DAR 0:0], 30.00 tb(r)
Stream #0.1: Audio: vorbis, 44100 Hz, mono, 80 kb/s
swScaler: Unknown format is not supported as input format
Cannot get resampling context

Yeap, that didn't work either.

Please, if you insist on using open containers and codecs can you at least give me some tool to convert it to a format that works with the rest of the world? I would love some easy GUI-based app that just works. I tried avidemux (gtk) and all I get is "cannot open file". So that's a dead end as well.

How can I make my files usable?
regala
April 21st, 2009, 12:07 PM
First some mencoder tips:
[code]
$ mencoder -idx input.ogv -ovc -lavc mp3lame -o output.avi


well, you should read better the man pages for mencoder, the cmdline should be:

$ mencoder -idx input.ogv -ovc lavc -lavcopts vcodec=mpeg4 -oac mp3lame -o output.avi


(you did not tell mencoder what video codec to use and did not give -ovc an argument)
regala
April 21st, 2009, 12:16 PM
well, you should read better the man pages for mencoder, the cmdline should be:

$ mencoder -idx input.ogv -ovc lavc -lavcopts vcodec=mpeg4 -oac mp3lame -o output.avi


(you did not tell mencoder what video codec to use and did not give -ovc an argument)

to explain:

-oac specifies the audio codec, here mp3lame, you can then add -lameopts to specify details about how the mp3lame codec will perform
-ovc specifies the video codec, here avcodec (lavc), you can then add -lavcopts to specify details about how libavcodec will perform (here i added vcodec=mpeg4)
ephracis
April 21st, 2009, 12:34 PM
$ mencoder -idx input.ogv -ovc lavc -lavcopts vcodec=mpeg4 -oac mp3lame -o output.avi
MEncoder 2:1.0~rc2-0ubuntu17 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Core(TM) Duo CPU T2350 @ 1.86GHz (Family: 6, Model: 14, Stepping: 12)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
success: format: 0 data: 0x0 - 0xb1725c1
[Ogg] stream 0: video (Theora v3.2.1), -vid 0
[Ogg] stream 1: audio (Vorbis), -aid 0
Ogg file format detected.
VIDEO: [theo] 320x240 24bpp 30.000 fps 0.0 kbps ( 0.0 kbyte/s)
[V] filefmt:18 fourcc:0x6F656874 size:320x240 fps:30.00 ftime:=0.0333
================================================== ========================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 1 ch, s16le, 80.0 kbit/11.34% (ratio: 10000->88200)
Selected audio codec: [ffvorbis] afm: ffmpeg (FFmpeg Vorbis decoder)
================================================== ========================
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
================================================== ========================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
[theora @ 0x88433b0]Missing extradata!
Could not open codec.
VDecoder init failed :(
Opening video decoder: [theora] Theora/VP3
VDec: vo config request - 320 x 240 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
videocodec: libavcodec (320x240 fourcc=34504d46 [FMP4])
Selected video codec: [theora] vfm: theora (Theora (free, reworked VP3))
================================================== ========================
MP3 audio selected.

Too many audio packets in the buffer: (4096 in 778282 bytes).
Maybe you are playing a non-interleaved stream/file or the codec failed?
For AVI files, try to force non-interleaved mode with the -ni option.

Flushing video frames.
Writing index...
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.

Video stream: nan kbit/s (-2147483648 B/s) size: 0 bytes 0.000 secs 0 frames

Audio stream: 104.615 kbit/s (13076 B/s) size: 6832 bytes 0.522 secs

Trying to play the output file gives error "Could not demultiplex stream."
ctsdownloads
April 27th, 2009, 06:43 PM
And yes, this is still a problem!

http://ubuntuforums.org/showthread.php?p=7163674#post7163674
edgarinventor
February 18th, 2010, 02:48 PM
I'm just trying Winff...

Works! :D

Converted it to youtube's flv, but there's more...

http://www.newbox.tv/index.php?option=com_hwdvideoshare&task=viewvideo&Itemid=1&video_id=1144
tubunu
March 10th, 2010, 10:12 AM
When I convert ogv to any other format I can only hear the sound, I have a black screen for video. Any tips?
OSLinuxFreak
April 28th, 2010, 09:10 PM
well, you should read better the man pages for mencoder, the cmdline should be:

$ mencoder -idx input.ogv -ovc lavc -lavcopts vcodec=mpeg4 -oac mp3lame -o output.avi


(you did not tell mencoder what video codec to use and did not give -ovc an argument)

This worked perfectly for me regala :). I just started working with trying screen cast and had same issue wit the .ogv. Thanks for sharing you knowledge.
edgarinventor
June 8th, 2010, 10:06 AM
When I convert ogv to any other format I can only hear the sound, I have a black screen for video. Any tips?

I got a fake-colored one, tried this, and worked.
http://gtk-apps.org/content/show.php?content=90837
Worked on a 3 minutes 17 seconds Video!
http://faz-voce-mesmo.blogspot.com/2010/06/como-sacar-o-som-do-youtube-no-ubuuntu.html :biggrin:
Spirit of Yggdrasill
July 26th, 2010, 02:09 AM
$ mencoder -idx input.ogv -ovc lavc -lavcopts vcodec=mpeg4 -oac mp3lame -o output.avi



Worked like a charm. Big thanks, I was biting my nails...:D
btw I was looking for: "ubuntu convert ogv for youtube"

Cheers,
Ivan :-)
FakeOutdoorsman
July 26th, 2010, 03:33 PM
You can also use FFmpeg to convert videos from recordMyDesktop, but you'll need to use a more recent version than what Lucid and previous releases provide. Fortunately you can compile FFmpeg fairly easily:

HOWTO: Install and use the latest FFmpeg and x264 (http://ubuntuforums.org/showthread.php?t=786095)
karmila
July 27th, 2010, 05:20 PM
This worked perfectly for me regala :). I just started working with trying screen cast and had same issue wit the .ogv. Thanks for sharing you knowledge.

worked for me too :D
karmila
July 27th, 2010, 06:07 PM
You can also use FFmpeg to convert videos from recordMyDesktop, but you'll need to use a more recent version than what Lucid and previous releases provide. Fortunately you can compile FFmpeg fairly easily:

HOWTO: Install and use the latest FFmpeg and x264 (http://ubuntuforums.org/showthread.php?t=786095)

thanks for the tips.

I can't figured out why ffmpeg is not working and the tips sorted it out ;)
alanmoore78
October 9th, 2010, 07:40 PM
I tell you what, I was trying so many different things to make ffmpeg work but mencoder took care of the problem. My .ogv file at 53MB that would play great audio but showed a static green screen once uploaded is now a .avi at 34MB and it uploaded and displays properly on YouTube.

THANKS! I made a video with recordMyDesktop to show my parents a few cars they wanted to find at local car dealers so I was able to visit the local dealer sites and show them what was in inventory and it works great! I'll be using the mencoder from now on, it's simple, it does the job, and I like playing on the command line.