Unknown video format

[>>-LuKe-->]

Hi, I've a question about an unknown video format: it's .flv
Someone know this?
How can I convert it?
Thank, bye.

LuKe

[Baldrick]

flash video, http://www.macromedia.com/devnet/mx/flash/video.html

[anaxamander]

ffmpeg -i /path/to/crappy.flv -f mp4 -vcodec mpeg4 -b 1200 -acodec aac -ab 128 -y /path/to/Output.mp4

if it complains about audio, perhaps it is poor quality, mono, low frequency... you can add: -ar 22050 -ac 1

you can reduce/increase the video bitrate after the -b; you increase/decrease audio bitrate after the -ab

If you don't have your own compiled ffmpeg, I believe you can use the embedded binary ffmpeg inside ffmpegX.app -I just checked, and yes you can with an older sept2,2004 ffmpeg at least.

http://ffmpeg.sourceforge.net/ffmpeg-doc.html for further information.

[captnswing]

Hej, I would like to convert a .flv movie to something else

e.g. I am trying to convert this movie http://www.videospark.com/feeds/sumo.flv

using ffmpegX 0.0.9s. I am trying to convert the movie using this command line

/Applications/ffmpegX.app/Contents/Resources/ffmpeg -i  sumo.flv  -f mp4 -vcodec mpeg4 -b 1200 -acodec aac -ab 128 -y sumo.mp4

I get the following output

ffmpeg version 0.4.9-pre1, build 4736, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --enable-mp3lame --enable-gpl --disable-vhook --enable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads 
  built on Jan  7 2005 02:34:06, gcc: 3.3 20030304 (Apple Computer, Inc. build 1666)
sumo.flv: could not find codec parameters

what am I missing? can anyone help? It would be great to get this to work....

thanks a lot
-captnswing

[anaxamander]

$ /Volumes/Applicate/AV\ Utilities/ffmpegX.app/Contents/Resources/ffmpeg -i /Users/me/Desktop/sumo.flv -f mp4 -vcodec mpeg4 -b 1200 -acodec aac -ab 128 -y /Users/me/Desktop/sumo.mp4
ffmpeg version 0.4.9-pre1, build 4721, Copyright (c) 2000-2004 Fabrice Bellard
built on Sep 2 2004 08:23:45, gcc: 3.3 20030304 (Apple Computer, Inc. build 1666)
Input #0, flv, from '/Users/me/Desktop/sumo.flv':
Duration: N/A, bitrate: N/A
Stream #0.0: Audio: mp3, 22050 Hz, stereo
Stream #0.1: Video: flv, 320x240, 15.00 fps
Output #0, mp4, to '/Users/me/Desktop/sumo.mp4':
Stream #0.0: Video: mpeg4, 320x240, 15.00 fps, q=2-31, 1200 kb/s
Stream #0.1: Audio: aac, 22050 Hz, stereo, 128 kb/s
Stream mapping:
Stream #0.1 -> #0.0
Stream #0.0 -> #0.1
Press [q] to stop encoding
frame= 403 q=2.0 Lsize= 2203kB time=26.8 bitrate= 673.5kbits/s
video:1842kB audio:352kB global headers:0kB muxing overhead 0.407142%
----------------------------------------------------
$ ffmpeg -i /Users/me/Desktop/sumo.flv -f mp4 -vcodec mpeg4 -b 1200 -acodec aac -ab 128 -y /Users/me/Desktop/sumo.mp4
ffmpeg version 0.4.9-pre1, build 4753, Copyright (c) 2000-2004 Fabrice Bellard
configuration: --prefix=/opt/local --disable-vhook --mandir=/opt/local/share/man --extra-libs=-L/opt/local/lib --enable-mp3lame --enable-libogg --enable-vorbis --enable-faad --enable-faac --enable-a52 --enable-a52bin --enable-gpl --enable-xvid --enable-gpl --enable-x264 --enable-gpl --enable-pthreads --enable-altivec --enable-shared
built on May 2 2005 22:19:45, gcc: 4.0.0 20041026 (Apple Computer, Inc. build 4061)

Seems that stream 1 comes from film source: 1000.00 (1000/1) -> 15.00 (15/1)
Input #0, flv, from '/Users/me/Desktop/sumo.flv':
Duration: N/A, bitrate: N/A
Stream #0.0: Audio: mp3, 22050 Hz, stereo
Stream #0.1: Video: flv, yuv420p, 320x240, 1000.00 fps
Output #0, mp4, to '/Users/me/Desktop/sumo.mp4':
Stream #0.0: Video: mpeg4, yuv420p, 320x240, 15.00 fps, q=2-31, 1200 kb/s
Stream #0.1: Audio: aac, 22050 Hz, stereo, 128 kb/s
Stream mapping:
Stream #0.1 -> #0.0
Stream #0.0 -> #0.1
Press [q] to stop encoding
frame= 403 q=0.0 Lsize= 2206kB time=26.8 bitrate= 674.3kbits/s
video:1842kB audio:355kB global headers:0kB muxing overhead 0.406640%

fatboys with pagers, right? Works for me. Top is ffmpegX's ffmpeg, bottom is my Tiger/gcc-4 ffmpeg.
Maybe check your paths, or don't copy and paste, but hand type it in.

[captnswing]

ok, good to know its working in principle. but on my machine (tiger) with the latest ffmpegX installed, I still get the error

sumo.flv: could not find codec parameters

when trying to convert that flv movie. anyone knows what this means?
thanks

[anaxamander]

Try the ffmpeg embedded in major's 9q version listed in this post:

https://www.videohelp.com/forum/viewtopic.php?t=268110

I was able to convert using that one. Or try another utility based on ffmpeg like MovieGate. version 1.14 had an ffmpeg that could convert the file.

[captnswing]

indeed the 9q version of ffmpegX worked!!

thanks a lot for your help!