Avconv Windows Download
Gaby Zenz
I am working on matlab R2017a. For my project, I have to install avconv. I have searched a lot, but I only find a useful link that is this. After installing it, I run setup.exe, add following path to environment variables that is
I'm adding this answer here because this topic looks like the only one discusses the avconv but the answers are not for the later versions of Ubuntu distro.But why would you if you could get the same result from ffmpeg.
So, as we learned from the Who can tell me... link, when libav forked from FFmpeg they also temporarily supplied their version of ffmpeg. As a member of libav, the ffmpeg maintainer in Debian and Ubuntu then decided to switch the distro to use libav. From the perspective of libav this was their best move: to force a large user community to use the fork.
Ubuntu switched during the transitional period when libav supplied both their version of ffmpeg and their renamed tool avconv. When users attempted to use libav's ffmpeg they got the following message:
In this case the "ffmpeg" mentioned in the message was libav's temporary version which was later removed (as was the message). Remember the difference between FFmpeg and ffmpeg? Of course this message thoroughly confused many users who understandably did not make the distinction between project and tool; especially Ubuntu users who were not aware that their distro did a switcharoo or users who never heard of libav. I don't know if libav intended users to think this, but they probably enjoyed this side-effect.
Nobody can tell you which one to use. The main difference for users is that FFmpeg merges many commits from libav, but it's not so reciprocal since libav seems to pretend that FFmpeg does not exist and only occasionally cherry-picks from FFmpeg.
It appears to be better to stick with FFmpeg. The whole situation is rather messy and ugly. I just started reading up on the fork a few days ago. Ignoring all the drama, here are what appear to be facts:
As far as I know it is not necessary to switch immediately, but Winff should be upgraded to allow for either binary (from the Debian perspective, with a preference for avconv). I know you can set the location of the binary in the preferences, but I think that with the location set, Winff should be able to find the proper binary.
I have implemented the checks for the correct binary in my local checkout, but reading up 1, I see that there are some inconsistencies between avconv and ffmpeg. That issue is larger, because the preset file will need adjustment and especially the way we create the command line will have to change. The options that operate on the input file need to go BEFORE the input file "-i".
FFmpeg audio/video conversion tool is now known as AVConv (a better name in my opinion). So "ffmpeg" command line tool is obsolete and "avconv" should be used. As far as I noticed all parameters remained the same, but further investigations should be made. Some modifications need to be done in CIS.
Install AVConv on the machine(s) that run CIS. Usually avconv should appear be updating ffmpeg (that worked on Ubuntu; not tested for Debian). Replace "ffmpeg" with "avconv" in cis/api/ffmpeg.py, class FFmpegTranscoder, field prog_bin, which represents the conversion tool executable. Refactor file names, class names, method names, variable names etc. that contain "FFmpeg" or "ffmpeg" such that they contain AVConv. An IDE like Eclipse could do this automatically. Test! If problems are noticed, debug!
The Libav project was a fork of the FFmpeg project.[6] It was announced on March 13, 2011 by a group of FFmpeg developers.[7][8][9] The event was related to an issue in project management and different goals: FFmpeg supporters wanted to keep development velocity in favour of more features, while Libav supporters and developers wanted to improve the state of the code and take the time to design better APIs.[10][11]
The maintainer of the FFmpeg packages for Debian[12] and Ubuntu,[13] being one of the group of developers who forked FFmpeg, switched the packages to this fork in 2011. Hence, most software on these systems that depended on FFmpeg automatically switched to Libav. On July 8, 2015, Debian announced it would return to FFmpeg[14] for various, technical reasons.[15] Several arguments justified this step. Firstly, FFmpeg had a better record of responding to vulnerabilities than Libav. Secondly, Mateusz "j00ru" Jurczyk, a security-oriented developer at Google, argued that all issues he found in FFmpeg were fixed in a timely manner, while Libav was still affected by various bugs.[16] Finally, FFmpeg supported a far wider variety of codecs and containers than Libav.
As of 2022,[update] Libav is an abandoned software project, with Libav developers either returning to FFmpeg, moving to other multimedia projects like the AV1 video codec,[17] or leaving the multimedia field entirely.
At the beginning of this fork, Libav and FFmpeg separately developed their own versions of the ffmpeg command. Libav then renamed their ffmpeg to avconv to distance themselves from the FFmpeg project. During the transition period, when a Libav user typed ffmpeg, there was a message telling the user that the ffmpeg command was deprecated and avconv has to be used instead. This confused some users into thinking that FFmpeg (the project) was dead.[18]
This message was removed upstream when ffmpeg was finally removed from the Libav sources. In June 2012, on Ubuntu 12.04, the message was re-worded, but that new "deprecated" message caused even more user confusion. Starting with Ubuntu 15.04 "Vivid", FFmpeg's ffmpeg is back in the repositories again.
To further complicate matters, Libav chose a name that was used by FFmpeg to refer to its libraries (libavcodec, libavformat, etc.). For example, the libav-user mailing list, for questions and discussions about using the FFmpeg libraries, is unrelated to the Libav project.[19][20]
Libav contains more than 100 codecs.[23] Many codecs that compress information have been claimed by patent holders.[24] Such claims may be enforceable in countries like the United States which have implemented software patents, but are considered unenforceable or void in countries that have not implemented software patents.
The Libav logo uses a zigzag pattern that references how MPEG video codecs handle entropy encoding.[25] It was previously the logo of the FFmpeg project until Libav was forked from it. Following the fork, in 2011 one of the Libav developers Mns Rullgrd claimed copyright over the logo and requested FFmpeg cease and desist from using it.[26] FFmpeg subsequently altered their logo into a 3D version.[27]
With participation in the Google Summer of Code, Libav has had many new features and improvements developed, including a WMVP/WVP2 decoder, hardware accelerated H.264 decoding on Android, and G.723.1 codec support.[28]
Numerous free and open-source implementations of existing algorithms for the (usually lossy) compression and decompression of audio or video data, called codecs, are available. Please note that an algorithm can be subject to patent law in some jurisdictions. Here are lists of the ones contained in the libav library:
Additionally to the aforementioned codecs, Libav also supports several file formats (file formats designed to contain audio and/or video data and subtitles, are called "containers", but that is just a special denomination.):
Video and Audio codecs: Tell avconv what codecs to use with -c:v for video and -c:a for audio. For example, -c:v mpeg2video -c:a mp2 would let avconv know you want it to encode the video with the mpeg2video codec and the audio with the mp2 codec.
With this command you can record high-quality MP3 or WAV files of whatever audio is running through your system. This is handy for all sorts of things such as web casting Skype calls and video tutorials.
Then record audio with avconv by using the exact device name after the -i switch. If you'd like to record system audio, chose the alsa output device, and if you'd like to record audio from your microphone, choose the alsa input device. In my case the command would be:
Looped Lightworks Input and Frame Rate Conversion. This command is good for converting files from many different types and codecs into the Lightworks compatable mp4 format and ensuring the frame rate is at 30fps.
This MP3 was created with the avconv utility on XUbuntu Linux 12.04. I have created lots of MP3s using the ffmpeg utility on Puppy Linux v5 and they have all worked fine in this player. However the overwhelming majority (but not all) of the MP3s created by XUbuntu 12.04 either cause the player to lock up or to restart. If I use Puppy Linux v5 to re-encode the MP3, the player will play it.
I have this linux command line app called avcon. It is used to converting files. For instance if I have a file called video.mp4 I can run avconv -i video.mp4 video.ogg and it will convert this video.mp4 to video.ogg.
So my problem(question):Whenever it converts any file the output file's quality is super bad compared to the original video (the input video). How can I get around with that? I mean how can I convert the file and still get the same quality?
Download a recent build of ffmpeg. Binaries for Windows, Linux, and OS X are available on the FFmpeg Download page. Development is very active and there is no need to use buggy avconv (note that this answer was written for ffmpeg, so I'm not sure if any examples will work with avconv).
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