Ubuntu Multimedia :: FFMPEG Screen Cast Starting Script?
Jul 16, 2011
I do quite allot of screen tutorials, and i am always useing this FMMPEG script.ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s $(xwininfo -root | grep 'geometry' | awk '{print $2;}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 -y video2.avi.I was just wondering if someone knows a script that i could put in a text file, make it executable and it would ask me what i wanted to save the file as, and it would put that text where "Video2.avi" goes, and then it would just run the normal FFMPEG script.
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Jan 3, 2011
I'm looking for software which will allow me to record a screen-cast of a terminal based application, recording keystrokes, timing of keystrokes, and audio. I see a couple of advantages to this approach over video capture: Display independence: the viewer can display text in any resolution/style they want, not limited to the resolution of the recorded video. Ability to copy and paste text from the screencast.
DSABE? (Does Such A Beast Exist?)
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Jun 12, 2010
Is there a program there that can display screen cast commentary as text in a transparent window centered on screen ( in a window that looks like a GNOME-Do window or Growl notification window).
Feature am looking for is almost like the alossage mode in emacs. But instead of showing what is being typed, each press of a shortcut key displays in a notification dialog in the lower 3rd of the screen one line at a time from a predefined text file.
So now - I can define a text description for each step in the screen cast in say ~/castScript.txt During screen-capture press the shortcut key to display each line of the text from the file onscreen
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Jul 25, 2011
As the title says, I'm looking for a command to resize on the fly as I capture. My desktop's 1680x1050, but I want to shrink down to say 1280x720.. or other.
So far my command is code...
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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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May 1, 2011
I recently upgraded to Ubuntu 11.04. I didn't really find the Unity interface useable (I didn't like Ubuntu Netbook Edition for this exact reason) and am running it in Classic mode. I have a Acer Aspire One D255, Intel Atom processor, etc. When I start the computer up from a hibernate, the screen goes black with a set of random colored pixels at the top corner. I have a mouse but nothing else.
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May 30, 2010
I did searched you tube but my results were not great.I have 2 books on KernelProgramming.I feel I need if some where I can get a video tutorial which can help me to understand how to develop a Linux Device driver that will be great.I had a look at Greg Kroah Hartmans video lecture of developing patches on ......I have been reading books and a lot of stuff.So I wish if I could get a video lecture that would be better
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Feb 27, 2010
i just found out (late i know) that the knew skype beta 2 now comes with the awesome screen-sharing feature that skype for mac and skype for win comes with..so i uninstalled the old skype and installed the new beta version with lightning quickness to try that out.. (and show off my compiz effects to all my friends lol!!)anyway, it seems to only work halfway for me. sharing the FULL screen will cause my skype app to crash and close instantly. but sharing a screen selection works just fine... even though i can't resize the screen selecting area.. but it's not that big a deal for me.
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Jul 3, 2011
The sort of add on for Firefox 'download helper' now has a new screen capture thing, in case it won't download the video from a particular site. You click the red button and a purple boundary appears round the video frame. I assume this is the basic function of the thing; it then provides the geometry of the purple frame to the program you've given it to capture the video.
By default the program it uses is 'recordmydesktop'. I've tried using this but get sound from the laptop's internal microphone, not the video. Tried 'pavucontrol' to remedy this but it says (wrongly) that no program is recording, so can't put things right.
So tried using ffmpeg: [URL]
Assume the stuff in curly brackets is what download helper supplies. Sometimes works perfectly but with B.BC. i-player only get the top left hand corner of the video and it is stretched somewhat horizontally.
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Jul 24, 2010
I have a double boot configuration with ubuntu 10.04 and windows xp when i start ubuntu the 'ubuntu' screen comes but the login screen does not appear. i tried to open ubuntu in recovery mode but it said:
I've tried using older kernels also just for info: my home and usr directories are in separate partitions & i've named my ubuntu partition as 'ubt'. i edited grub.conf file before this happened ( to comment out older kernel boot options) but grub is working porperly and i am able to boot into windows without any issues.
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Jan 13, 2010
I've got a bunch of HD files in .mkv format that I want to convert to a format that the 360 will read (currently just trying .avi files) so I can stream the media to my xbox360. I'd rather avoid transcoding the entire file, so I tried unpacking the .mkv file into audio and video (and subtitle if necessary) and repacking said file into avi using ffmpeg. The repacking is where I am having the problem. Here's the commands I tried at first (it might look familiar):
Code:
mkvextract tracks file.mkv 1:temp_video.avi 2:temp_audio.ogg 3:temp_sub.srt
ffmpeg -i temp_video.avi -i temp_audio.ogg -vcodec copy file.avi
However, I keep getting this annoying error:
Code:
Error while opening codec for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height Where stream #0.1 is the output audio stream to the .avi file. I think I have narrowed it down to the fact that the input streams are all 6 channel (5.1 surround sound) which mp2 doesn't support (the ffmpeg audio default) so I did this instead:
Code:
ffmpeg -i temp_video.avi -i temp_audio.ogg -vcodec copy -acodec libmp3lame file.avi
I'm still getting the same error, but when I use
Code:
ffmpeg -i temp_video.avi -i temp_audio.ogg -vcodec copy -acodec libmp3lame -ac 2 file.avi
to change the sound to stereo it works. Problem is I'd like to keep my media in surround sound. Any thoughts on how to get all 6 channels in the new mp3 file? I'm fairly certain that mp3s support 5.1. And after some messing around, I haven't found that my ffmpeg can transcode audio format from 5.1 back to 5.1. So since (I think) the 360 can play .ac3 files I decided to just copy both the video and audio file to the .avi file sans transcoding using
Code:
ffmpeg -i temp_video.avi -i temp_audio.ogg -vcodec copy -acodec copy file.avi
however now about halfway through, I run into this error:
Code:
NULL @ 0x22f3a00]error, non monotone timestamps 62562 >= 62562
av_interleaved_write_frame(): Error while opening file I can't seem to find any solution to this problem anywhere online, does anyone know how to get around this? I'd prefer to use ffmpeg for this if possible. (so I can write a script and just attack an entire directory at once) For what it's worth, I'm using the latest ffmpeg in the ubuntu (karmic) default repositories.
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Apr 26, 2010
i want to convert a song from ogg format to mp3 using ffmpeg the command i use to do this is
ffmpeg -i /home/john/Music/input.ogg to mp3 output.mp3
i then get then get a message back saying
"unknown format"
how do i correct this ?
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May 18, 2010
The command line to convert to ogg theora
ffmpeg -y -i input.flv -sameq OUTPUT.ogv
runs perfectly on 9.04 but on 10.04 it gives errors:
Code:
ffmpeg -y -i input.flv -sameq OUTPUT.ogv
FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --extra-version=4:0.5.1-1ubuntu1 --prefix=/usr --enable-avfilter
[Code].....
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May 27, 2010
It seems more and more people are encoding with the MKV container on bit torrent these days, and a lot of the shows I'm watching are starting to release almost exclusively with .mkv formatted videos. This is not a problem if I want to watch the shows on my computer but I've become accustomed to watching them on my PlayStation3 using my thumb drive. It seems the offical documentation for the PS3 includes a list of supported codecs [URL], but when I use FFMPEG to convert with libxvid video and aac audio in the MP4 container my PS3 says the output video is not supported. I've also tried most combinations of libxvid, libx264, mpeg4 for -vcodec and aac, libmp3lame for -acodec in several different container formats but nothing seems to work. I have found one option that always works:
Code:
ffmpeg -i inputfile.mkv -sameq -ac 2 outputfile.mpeg
I don't like doing it this way, however, as the output file is twice the size and the audio quality is terrible. If I don't reduce the audio channels to only two using -ac 2 FFMPEG throws an error (apparently MKV audio supports 6 channels). And preserving the video quality in MPEG video using -sameq produces too a large file (and I prefer to keep my files as lossless as possible). Ideally I want to save the files on an external HD I have but if a single episode of a show is 1.5 GB it's not very pratical.
Anyway, the PS3 docs say it supports h264 and xvid with aac audio, but apparently I'm doing something wrong. Has anyone sucessfully used FFMPEG to convert an MKV to MP4 for use on a PS3?
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Jul 28, 2010
I have a .mkv container with proper video (h264/~6000kbps) and audio (DTS/1500kbps). For some reason I want to have similar quality but with another video and audio codecs. For video it goes well and ffmpeg is very helpful here, no problems. Also, I want DTS to become AC3/320-448kbps/5-6 channels. Commands like this:
Quote:
ffmpeg -i in.dts/mkv -acodec ac3 -ac 5 -ab 448k out.ac3
gives me not proper reordered sound in channels, so I hear center on the right, music on the left, etc.
Is there a way to make that properly with ffmpeg?
Also, I have a question about multi core encoding cause I have a quad processor. Ffmpeg seems not using them in all the way, I get something like 25% of CPU usage while encoding. Command -threads, even using the h264, does not make any extra load of cpu.
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Jul 29, 2010
I'm making little animated bits in GIMP with the gap package. I can only get GIMP to encode the files as .avi. Problem here is that when I try to use any converter, it compresses 80MB files down to 1MB-4MB files and, unsurprisingly, the video quality is terrible. WinFF and ffmpeg (via terminal) output at a drastically reduced size. Is there some way to keep the files big/big-ish? I don't want to lose any detail.
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Aug 31, 2010
i want to convert DVD movie to mp4 using x264 and aac. I'm having some issues with GUI apps.I use ffmpeg in terminal for all my single file converts and prefer to use it but don't know how to use it in terminal for a DVD movie to mp4.
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Nov 4, 2010
Recently I installed gtk-recordMyDesktop, so that I could record my movements and send the Media File to my dad, so he could learn how to use Ubuntu too [plug]My problem is converting the .ogv file to .avi - I have tried ffmpeg but it loses quality dramatically.Can anyone tell me how to get better quality video out of ffmpeg, or let me know another way to convert the .ogv file to .avi or something that is widely used?
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Feb 13, 2011
I've been recording one of my classes with my android phone, and the file it gives me is an .amr file. I'd like to convert that to .mp3, and I was hoping I could use ffmpeg to do it via the command line. Here's what I did, and the output that I got:
Quote:
roger@KarmaLaptop:~/Desktop$ ffmpeg -i Net202-week6.amr Net202-week6.mp3
FFmpeg version 0.6-4:0.6-2ubuntu6, Copyright (c) 2000-2010 the FFmpeg developers
built on Oct 5 2010 22:36:53 with gcc 4.4.5
configuration: --extra-version=4:0.6-2ubuntu6 --prefix=/usr --enable-avfilter
[Code]....
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Jul 17, 2011
i have a mp4 file and i will convert it with ffmpeg and add new subtitle i use this command
Code:
ffmpeg -i Taylor-Swift-Mine.mp4 -b 768000 -r 24 -s 640x360 -aspect 16:9 -newsubtitle Mine.srt -ab 128000 -ac 2 -ar 44100 out.mp4
and output command
Code:
ffmpeg version N-30884-g54dd50d, Copyright (c) 2000-2011 the FFmpeg developers
built on Jun 20 2011 19:09:46 with gcc 4.4.3
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libopencore-amrnb --enable-
[code]...
At least one output file must be specified Do you see i can't convert my file now how i add subtitle to my video in ffmpeg
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Feb 28, 2010
From "man gcc"
-Wno-int-to-pointer-cast (C and Objective-C only)
Suppress warnings from casts to pointer type of an integer of a different size.
[code]...
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Sep 29, 2010
I have been trying to get a void pointer cast to work and I seem to have some problems. My code compiles, but when I execute it gives back garbage data. I'm not sure what I'm doing wrong.
Code:
int main()
{
[code]....
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Jan 14, 2010
have downloaded from internet to a mp4 format, so I can play them in my Nokia 5800.This is command line that works perfectly:ffmpeg -i "input.avi" -f mp4 -vcodec libxvid -s 640x360 -b 768kb -r 25 -aspect 16:9 -acodec libfaac -ab 96kb -ar 44100 -ac "output.mp4"n:Is there a way to make it really quiet so I can run it from cron..
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Jan 17, 2010
I installed Audacity to convert an mp4 to an mp3. Now, I don't necessarily need Audacity to do this, but for the time being I'm more concerned with getting Audacity to work properly as opposed to getting an mp3 onto my iPod.
In Audacity, I went to Edit>Preferences>Libraries. For the MP3 Export Library, Audacity recognizes LAME, but under the FFmpeg Import/Export Library it says "FFmpeg library not found." I hit the Download button and read this page on how to install FFmpeg, noticing the warning about needing FFmpeg 0.5 or later on Linux.
I fired up Synaptic and searched for "ffmpeg," chose the vanilla version and installed it along with two dependencies which I don't exactly remember but I bet they were libavformat52 and libavdevice52.
Back in the Audacity Preferences window I chose the "Locate..." button to point to the newly installed libraries, but Audacity is not recognizing/installing them successfully. I've tried pointing to the following files:
/usr/lib/libavformat.so.52
/usr/lib/libavformat.so.52.36.0
/usr/lib/i686/cmov/libavformat.so.52
/usr/lib/i686/cmov/libavformat.so.52.36.0
/usr/share/lintian/overrides/libavformat52
[Code]....
Did I install the wrong version of FFmpeg or libavformat? Any pointers?
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Mar 15, 2010
I have a file with about 6 .flv files and I wish to batch convert them to libmp3lame. I have tried making a #!bin/bash script with all the files in e.g.
Code:
ffmpeg -i filename.flv -sameq -acodec libmp3lame -f asf filename.mp3
I have inserted all the filenames individually into the script but when I ran it I got too many errors and i was wondering if someone knew a quicker way to do it e.g. a script that would batch convert all .flv files in that folder to .mp3 format.
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Mar 31, 2010
how can i merge two files with ffmpeg?
one is : /home/pt/t/pa1.flv
the other is : /home/pt/t/pa2.flv
1 o merge with ffmpeg
ffmpeg -i /home/pt/t/pa1.flv -i /home/pt/t/pa2.flv -vcodec copy -acodec copy /home/pt/t/dd.flv
the problem is: the merged file ( /home/pt/t/dd.flv ) just contain one file--the first one
/home/pt/t/pa1.flv,there is no the second file--/home/pt/t/pa2.flv in the /home/pt/t/dd.flv
[Code].....
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Apr 24, 2010
I just installed 10.04 today and i love it I'm trying to install some software tried devede but i didn't like it only text menu's and nothing more.I also found tovid software looks really cool and i was wanting to try it i tried to install the debs but no go the tovid website say's to install from subversion it also says something about installing ffmpeg from subversion.So what is subversion and how do i install from it?
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Jun 20, 2010
I recently developed a taste for the Alac format and ffmpeg will oblige with this line of code
Code:
ffmpeg -i <input> -acodec alac <output>.m4a
and this worked beautifully one file at a time and
How does one do all the files in a given folder? Is there an asterisk one adds as in shntool.
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Jul 11, 2010
I've seen posts with similar titles on these forums, but I know nothing about the plethora of codes out there and all those thread seem to be way over my head. I've installed ffmpeg (an unrestricted version) but I can't convert m4a audio files to mp3 audio files. I installed a package called 'libavcodec52' from synaptic because it came up in the search results for 'm4a' and its description said something about m4a and ffmpeg but still no luck..
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Aug 8, 2010
When using libmp3lame with ffmpeg is there a way to use lame options?
Code:
ffmpeg -i foo -acodec libmp3lame foo.mp3
For example:- --vbr-new, --abr <bitrate>, -V (n) and -q <arg>
I think it is possible to pipe ffmpeg to lame then use the options.But is it possible to do it without a pipe.
Code:
ffmpeg -i foo -f wav - | lame --vbr-new -V 4 - foo.mp3
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