General :: Encoding With FFmpeg Using A FIFO
Dec 28, 2010
I'm trying to convert Flac audio file to AAC file using command line. It's working fine. Now I want to do the same using fifo And it's freezing.So could you tall me what I'm doing wrong.
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Feb 19, 2010
I'm trying to encode a wmv file to flv with ffmpeg. The video codec is WMV3 and the audio codec is wmap (Windows Media Audio Professional). The command I use is:
Code:
/usr/bin/ffmpeg -i <input file>.wmv -s 640x350 -b 1024k -r 25 -ar 44100 -ac 2 -y <output file>.flv
Output:
Code:
FFmpeg version 0.5-svn17737+3:0.svn20090303-1ubuntu6, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --extra-version=svn17737+3:0.svn20090303-1ubuntu6 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --disable-stripping --disable-vhook --enable-libdc1394 --enable-shared --disable-static .....
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
[wmv3 @ 0xb32c00]Extra data: 8 bits left, value: 0
Unsupported codec (id=86056) for input stream #0.1
As you can probably see the audio codec is not supported. Is there a way to encode WMV3+wmap with ffmpeg or any other tool in Linux? Windows Media Encoder in Windows is able to encode such files to a supported codec. For example: WMV3+WMA2/WMV2+WMA2, I could then encode it in Linux. I'm trying to find a way to directly encode WMV3+wmap in Linux.
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Jul 12, 2011
What is a pipe? and why a file is a named pipe? I am just learning linux.
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Aug 16, 2011
I'm writing a C++ application and need to work with process substitution in the Bash shell. I'm trying to find a way to validate the paths passed as arguments to my program, some of which point to FIFO files created by process substitution.
Is there a shell (or C++) way that I can check if the system creates these files in /dev/fd or if they are created somewhere else?
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Sep 19, 2010
I am trying to set up sshdfilter on my new linux box and can't get the expected functionality. I couldn't get IP's to be blocked no matter how many bad passwords I put in. I have sshdfilter set up to read from a fifo (/var/log/sshd.fifo, which has been chmod'd to 600), but when I run sudo tail -f /var/log/sshd.fifo, I don't see any output as I attempt to SSH into the machine, though /var/log/auth.log is correctly logging the login attempts. However, when I run sudo reboot -h now, the entries from /var/log/auth.log appear in the FIFO. I'm wondering if I don't have a misconfiguration somewhere that isn't allowing my auth.log to pipe to my FIFO (I am running a virtual bridge). I can provide more system specific information if anybody is curious (no, I won't give you my IP so you can brute force my sshdfilter-less computer.
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Jul 20, 2010
Since ffmpeg 6 is out for some time, when will Ubuntu Lucid afford such a new ffmpeg package from its repository?
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Sep 18, 2009
How can I add, a custom encoding to kde konsole? Is there any other way to do it, execpt recompilling the qt-3 ?
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Mar 15, 2010
we have a dedicated linux server for our web hosting services which we purchased a few months ago...however the support is limited and every time we ask for assistance we are told to find the answer ourselves and pay the techies to install our solution! Anyway... we seem to have issues with character encoding on our websites - any text that isn't fully ASCII coded is outputted as funny symbols - for example:
[Code]...
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Apr 26, 2010
I have a file of words and want to encode them in a numeric form, based on position.This is best explained by example:
PEOPLE ==> 123152
Reading left to right:
P was first encountered at position 1 so it is encoded as 1.
E was first encountered at position 2 so it is encoded as 2.
[code]...
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Jun 7, 2011
I am only using the 128 character set defined in the original ANSI standard. But as a whole how are the files implmeneted differently. I am not concerned with the display, i.e. if a tab is displayed with 6 or 8 characters but the actual internal representation in memory
One differnce I've hear is the use of (Windows) vs. for line termination (Linux).
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Jun 24, 2011
There are many plain text files which were encoded in variant charsets.
I want to convert them all to UTF-8, but before running iconv, I need to know its original encoding. Most browsers have an Auto Detect option in encodings, however, I can't check those text files one by one because there are too many.
Only having known the original encoding, I then can convert the texts by iconv -f DETECTED_CHARSET -t utf-8.
Is there any utility to detect the encoding of plain text files? It DOES NOT have to be 100% perfect, I don't mind if there're 100 files misconverted in 1,000,000 files.
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Sep 3, 2010
how to search in files text that is one-byte encoding? places - search for files in gnome in ubuntu searches only utf-8 text.i know one way: install wine and total commander, then search with it. what are better ways?[URL]
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Mar 23, 2011
I want to convert many text files(copied from windows workstation) into utf-8 encoding file. Yes, iconv is available for it. However, I have to give source file encoding at the command line parameters! The problem is, at most case, I am not sure the source encoding of it. And, I also want to use a script to convert many files recursively.
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Jan 16, 2011
I've multiple jpegs uploaded form IP cam via FTP, I use mencoder to periodically pack them into single avi file, problem is that sometimes one or two jpegs submitted by cam are broken, and this make mencoder exit, without producing movie
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Jan 4, 2010
I am trying to do Multi_key composition...But not able to find which is my character encoding scheme under /usr/share/X11/locale/ I have several direcotries under this folder...How can i come to kno which is my character encoding scheme..Any command for this ?
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Mar 2, 2011
I've written a simple server in linux used fork to create a FIFO pipe.The server create two FIFO pipe.One for server read data from client and write data to client.Then another pipe for client read data from server and write data to server.When the server read data from a client used server-pipe and then write data to client.But ,if the client no read open the pipe,the server side write will be crashed because of a broken-pipe SIGPIPE. How to check whether the read side is opened?Or,how to catch the SIGPIPE,and then my server will still execute on,not crashed!!
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Nov 2, 2010
I am trying to change the IP address of the traffic that has been stored. I have tried different commands:
[code]...
however, either from these two commands end up with a following error:
[code]...
when I searched for a solution and generic commands I used those two websites: website1 website2 Commands have been tested using a casual user account as well as a privileged one (root).
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Dec 6, 2010
I tried to tag late onto a question similar to mine on stackoverflow (Find Non-UTF8 Filenames on Linux File System) to elicit further replies, with no luck so far, so here goes again... I have the same problem as the OP in the link above and convmv is a great tool to fix one's own filesystem. My question is therefore academic, but I find it unsatisfactory (in fact I can't believe) that 'find' is not able to find non standard ascii characters.
Is there anyone out there that would know what combination of options to use to find filenames that contain non standard characters on what seems to be a unicode FS, in my case the characters seem to be 8bits extended ascii rather than unicode, the files come from a Windows machine (iso-8859-1) and I regularly need to fetch them. I'd love to see how find and/or grep can do the same as convmv.
[Code]....
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Sep 9, 2009
I could stream the following file at my darwin server it means i am able to stream .mov files with 8KHz sampling rate and 20kb/s bite rate.
Quote:
# ffmpeg -i streamingloadtool.mov
FFmpeg version SVN-r10524, Copyright (c) 2000-2007 Fabrice Bellard, et al.
configuration: --enable-libxvid --enable-gpl --enable-libamr-nb --enable-libmp3lame --enable-libfaac --enable-libfaad
[code]....
The problem is i unable to stream this kuraiamr_nb.mov file at my streaming server. when i play this file in quicktime player its stating that this is a unsupported media type.
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May 11, 2011
I am looking for an option to convert .vob file to mp4 format. Command "ffmpeg -i S.vob x.mp4" is giving error message "[libfaac @ 01cac110] Unable to load libfaac.dll". I tried to convert in other formats like .avi with the same command and got success. Conversion is decreasing the quality like hell. Though size of the file after conversion is as big as original then why this bad quality. Some where I have read if I will not specify any argument it will keep the quality same but here it is not happening. Not sure why....
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Apr 6, 2009
You want to cut lets say a 15 minute video into 10 minute video, removing the first 5 minutes of it using ffmpeg?s?
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Jul 6, 2011
I am running this command in Ubuntu and windows but I get the full length instead of 10 mins. I want to split it in 10 minutes.ffmpeg -i 2000.flv -ss "00:00:00" -t "00:10:00" -vcodec copy -acodec libfaac 2010.flv
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Oct 4, 2010
Code:
$ffmpeg -i /data/sumeet/video/hollywood/you don't know jack/You.Dont.Know.Jack.2010.DVDRipwww.theevolution.org_by_digoloko.rmvb
FFmpeg version git-1dbd813, Copyright (c) 2000-2010 the FFmpeg developers
built on Oct 1 2010 19:28:12 with gcc 4.4.3
[Code].....
At least one output file must be specified Actually the video has embedded subtitles. I thing that is stream 0.2 in real media container. How can i pull that data out ?
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Apr 28, 2011
Im using slackware 13.1 , and tried to record my desktop with recordmydesktop but the qualite was very bad, then i googled the subject little, and i found this commande with ffmpeg here is it:
And i have this output:
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Feb 4, 2011
I've created some time-lapse videos from photos, using this command: ffmpeg -i IMG_%03d.JPG -s 1440x1080 -sameq video.MP4
And it worked great. Now I want to join several of these time-lapse videos to make a single, longer video (all the input videos have the exactly same format). I already tried using: cat video1.MP4 video2.MP4 > stitch.MP4
but the output ends up being equal to video1.MP4, I don't want to transcode nor changing any parameter of the video, I just want a end-to-end stitching, as if those videos were on a playlist.
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Feb 17, 2011
i wanted to install ffmpeg with lame mp3 support.its procedure is as follows:
cd /usr/local/src/ffmpeg/
./configure -enable-libmp3lame -enable-libogg -enable-libvorbis
make && make install
but i have not passed -enable-libmp3lame during installing to ./configure so mp3lame support is not available.how can i modify existing installation to install libmp3
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Apr 25, 2011
I have installed xampp1.7.3 in "/opt/" directory .
Where i have to install ffmpeg either in web root i.e 'htdoc' or any where?
How to install ffmpeg?
What are the lib has to be installed for converting any movies uploaded by user to avi and capture image from video?
How to configure with php so that ffmpeg is visible in phpinfo()?
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May 19, 2011
I use ffmpeg to convert my files, but when I do so, I lose the keyframes metadata from my flv files. The command I use right now is: $/usr/local/bin/ffmpeg -i %s -ab 96k -ar 44100 -b 500k -r 25 -f flv %sHow can I avoid ffmpeg to delete the keyframes info?
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Mar 24, 2011
I am running a video script on my server and I am very new to running a dedicated server and commands. Most of our site was setup but other and someone has broke something and no one seems to know how to fix.
Here is the issue. We run a script that uses these requirements
[Mod edit]Adult content Link removed
requirements
Now our server guy ran a update inside webmin for debian and now our videos still convert but wont make thumbs. Here is what he did.
Now updating libsmbclient ..
Now the AVS script wont make thumbs and webmin still wants to do 3 more updates that get unmet dependencies errors. Here they are when we try to run another update.
Building complete list of updates ..
Now what we need to do is either undo the update he already did or maybe get the one its asking for now to work but not sure which one will fix our thumb generating problem? Here is the error in the log file of the AVS script.
Seems stream 0 codec frame rate differs from container frame rate:
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Nov 10, 2010
Code:
ffmpeg -i Mumbai.Meri.Jaan.2008.1CD.XviD.AC3-5.1.Esub.By.Deejam.avi -ss 8170 -t 302 bambai-meri-jaan.mp3
FFmpeg version git-1dbd813, Copyright (c) 2000-2010 the FFmpeg developers
built on Oct 1 2010 19:28:12 with gcc 4.4.3
configuration: '--enable-avfilter' '--enable-avfilter-lavf' '--enable-vdpau' '--enable-bzlib' '--enable-
[Code].....
Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height
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