ffmpeg 0.5 flv to wav conversion creates wav files that other programs won't open.

Posted by superrebel on Stack Overflow See other posts from Stack Overflow or by superrebel
Published on 2010-04-05T21:17:37Z Indexed on 2010/04/05 21:23 UTC
Read the original article Hit count: 505

Filed under:

ffmpeg

|

flv

|

wav

Hi,

I am using the following command to convert FLV files to audio files to feed into julian, a speech to text program.

cat  ./jon2.flv | ffmpeg -i - -vn -acodec pcm_s16le -ar 16000 -ac 1 -f wav - | cat - > jon2.wav

The cat's are there for debugging purposes as the final use will be a running program that will pipe FLV into ffmpeg's stdin and the stdout going to julian.

The resulting wave files are identified by "file" as:

jon3.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 16000 Hz

VLC (based on ffmpeg) plays the file, but no other tools will open/see the data. They show empty wav files or won't open/play. For example Sound Booth from CS4.

Has anyone else had similar problems? Julian requires wav files 16bit mono at 16000 Hz. Julian does seem to read the file, but doesn't seem to go through the entire file (may be unrelated).

Thanks,

-rr

© Stack Overflow or respective owner

Related posts about ffmpeg

how to install ffmpeg in cpanel

as seen on Super User - Search for 'Super User'
i'm using dedicated server(linux) so i need to install ffmpeg in cpanel so here ffmpeg i found in Main Software Install a Perl Module but i writing script in php so how can i install ffmpeg phpperl when i'am trying to install ffmpeg in perl module i get this response Checking C compiler… >>> More
FFMpeg-PHP Installation Error

as seen on Server Fault - Search for 'Server Fault'
While installing FFmpeg-PHP, I got this interesting error: /usr/downloads/ffmpeg-php-0.6.0/ffmpeg_movie.c: In function 'zim_ffmpeg_movie_getAudioStreamId': /usr/downloads/ffmpeg-php-0.6.0/ffmpeg_movie.c:1051: error: 'CODEC_TYPE_AUDIO' undeclared (first use in this function) /usr/downloads/ffmpeg-php-0… >>> More
git problems installing stuff [closed]

as seen on Super User - Search for 'Super User'
root@Frenzen:~# cd root@Frenzen:~# git clone --depth 1 git://source.ffmpeg.org/ffmpeg Initialized empty Git repository in /root/ffmpeg/.git/ root@Frenzen:~# cd root@Frenzen:~# git clone --depth 1 git://source.ffmpeg.org/ffmpeg Initialized empty Git repository in /root/ffmpeg/.git/ root@Frenzen:~#… >>> More
Unable to install ffmpeg-php

as seen on Server Fault - Search for 'Server Fault'
I followed the instructions on http://www.mysql-apache-php.com/ffmpeg-install.htm but ffmpeg-php does not show up in my phpinfo() The commands I ran (in order) #yum install ffmpeg ffmpeg-devel ... Public key for faac-1.26-1.el5.rf.x86_64.rpm is not installed #rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0… >>> More
Unable to install ffmpeg-php

as seen on Server Fault - Search for 'Server Fault'
Hi, I followed the instructions on http://www.mysql-apache-php.com/ffmpeg-install.htm but ffmpeg-php does not show up in my phpinfo() The commands I ran (in order) #yum install ffmpeg ffmpeg-devel ... Public key for faac-1.26-1.el5.rf.x86_64.rpm is not installed #rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0… >>> More

Related posts about flv

FLV to FLV with the same quality?

as seen on Stack Overflow - Search for 'Stack Overflow'
How to convert flv to flv so that the output flv doesn't get worse in quality? >>> More
Converting stream of jpg files to FLV stream

as seen on Stack Overflow - Search for 'Stack Overflow'
I work with a Panasonic hcm280a camera that can be controlled by my software, It generates a stream of jpeg files that are huge and I want to convert this stream to a FLV stream preferably with a good compressional ration Does FFMpeg do that? I am basically looking for an off the shelve open source… >>> More
How to Watch Youtube Videos on PSP with iMoviesoft FLV Converter

as seen on Stack Overflow - Search for 'Stack Overflow'
Do you have worried about it? You can not watch Youtube videos anytime, anywhere.It is so boring on the way to work and home.How you want to be able to enjoy the wonderful Youtube Video on PSP that you can watch them on the way to home, home on bus. This artice will tell you about how to convert… >>> More
How do I reduce the screen and file size of a recorded video, plus convert to FLV?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have used gtk-recordMyDesktop to make a video as an OGV file using the default settings. I need to do 3 things: How can I reduce the screen resolution (height and width) so that it can fit into a smaller video size on my website? How can I pull out like every third frame so that the file size… >>> More
How can videos from Ubuntu drive appear on web page and play in an embedded Flash Player?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have a shared folder on Ubuntu Server 12.04. Users drop videos in. Ubuntu runs a Cron task to convert them to FLV format and put them into another folder. All I would like is a simple web page that displays all the files in that folder as links, and when you click on the link for the video you… >>> More