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18 Janvier 2021
The command line method to convert youtube flv files to avi using ffmpeg and mencoder. There are many more advanced options which can be found by checking th. Convert Flash video to Audio Video Interleave movie. We have found 40 software records in our database eligible for.flv to.avi file format conversion. Flash Videos can be easily converted to common AVI format with almost any currently popular video conversion software.
A few days ago I downloaded a video file (.flv) from a website. I wanted to convert the video from .flv to .avi (I know it's not a free format, but I needed to). I searched over the Internet and found out about FFmpeg. FFmpeg is a command line tool used to convert multimedia files between formats. Not only it converts video files but it also converts audio files.
To make sure FFmpeg is already installed on your GNU/Linux distribution, open the package manager you use and search for ffmpeg. Install it if it's not already installed. I usually use the Konsole (Kubuntu's Terminal), so I typed:
$ sudo apt-get install ffmpeg
Ok, now we have the program, but how does it work?
To begin with, open up a terminal. I understand that lots of people are afraid , bored or don't like using it, but once you get the hang of it, you can perform many useful tasks.
The generic syntax is:
$ ffmpeg [[infile options][`-i'infile]]… {[outfile options] outfile}…
You have to have in mind that options that precede the infile are applied to the the infile and options that are between the infile and outfile are applied to the outfile.
In my case, I had a .flv file and I wanted to convert it to .avi. So the way to do it is:
$ ffmpeg -i infile.flv outfile.avi
Done! Simple as that! You will find the .avi file in the same folder!
Keep in mind that by default, FFmpeg tries to convert as losslessly as possible, attempting to keep the best quality for the output file. It uses the same audio and video parameters for the outputs as the one specified for the inputs.
If you want to see what formats and codecs are available on your PC just type:
$ ffmpeg -formats
FFmpeg supports .3gp, .avi, .mp3, .mp4, .mvi, .rm , .mkv among many others.
-b bitrate where bitrate isthe video bitrate in bit/s. The default is 200kb/s
-r fps where fps isthe frame rate in Hz. The default value is 25Hz.
-s size where size is the frame size. The default in FFmpeg is the same as the source. The format is ‘wxh'. wxh is equal to 160×128. You can use both either wxh or 160X128 (see video options link below for all sizes)
-aspect aspect where aspect is the aspect ratio with values 4:3, 16:9 or 1.3333 or 1.7777.
-vcodec codecwhere codec is the name of the video codec that you want the FFmpeg to use.
-arfrequency where frequency is the audio sampling frequency. The default value is 41000KHz
-ab bitrate where bitrate is the audio bitrate in bit/s. The default is 64k.
-acodeccodec where codec is the name of the audio codec that you want the FFmpeg to use.
More details can be found here:
Following are some examples mentioned on ffmpeg documentation.
Example 1:
ffmpeg -i input.avi -b 64k output.avi
With the -b 64k option we set the outfile bitrate to 64kbit/s
Example 2:
ffmpeg -r 1 -i input.m2v -r 24 output.avi
Using the -r 1 we force the frame rate of the input file (valid for raw formats only) to 1 fps and with the -r 24 we set the the frame rate of the output file to 24 fps.
Example 3:
ffmpeg -i test.wav -acodec mp3 -ab 64k test.mp3
In this exampe we can see the use of FFmpeg for audio files. We convert a .wav file to .mp3. As said before using -acodec mp3 we force FFmpeg to use the mp3 audio codec to create the output file. The -ab 64k tells ffmpeg to use an audio bitrate of 64k.
Example 4:
ffmpeg -i video.avi -ar 22050 -ab 32 -s 640×480 video.mp4
Using the -ar we set the audio sampling rate to 22050 Hz. The -ab as i said sets the audio bitrate to 64k and the -s sets the frame size to 640×480. Here instead of 640×480 we could have used vga like this:
ffmpeg -i video.avi -ar 22050 -ab 32 -s vga video.mp4
Remember to see the video options link for all available sizes.
Conclusion: With FFmpeg you can manipulate and convert video and audio files between a variety of formats, fast and easy, with just a simple command. Remember not to hesitate to use the terminal!
| Name | FLV | AVI |
| Full name | FLV - Flash Video | AVI - Microsoft Audio/Visual Interleaved |
| File extension | .flv, .f4v, .f4p, .f4a, .f4b | .avi |
| MIME type | video/x-flv | video/vnd.avi, video/avi, video/msvideo, video/x-msvideo |
| Developed by | Adobe Systems | Microsoft |
| Type of format | Media container | video file format |
| Description | Flash Video is a container file format used to deliver video over the Internet using Adobe Flash Player version 6 and newer. Flash Video content may also be embedded within SWF files. Flash Video used to be the de facto standard for web-based streaming video. Notable users of it include Hulu, VEVO, Yahoo! Video, metacafe, Reuters.com, and many other news providers. | Audio Video Interleaved (also Audio Video Interleave), known by its initials AVI, is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows software. AVI files can contain both audio and video data in a file container that allows synchronous audio-with-video playback. |
| Technical details | There are two different video file formats known as Flash Video: FLV and F4V. The audio and video data within FLV files are encoded in the same manner as they are within SWF files. The F4V file format is based on the ISO base media file format and is starting with Flash Player 9 update 3. Both formats are supported in Adobe Flash Player and developed by Adobe Systems. | AVI is a derivative of the Resource Interchange File Format (RIFF), which divides a file's data into blocks, or 'chunks.' Each 'chunk' is identified by a FourCC tag. An AVI file takes the form of a single chunk in a RIFF formatted file, which is then subdivided into two mandatory 'chunks' and one optional 'chunk'. |
| File conversion | FLV conversion | AVI conversion |
| Associated programs | Adobe Flash Player | Windows Media Player, Windows Movie Maker, Avidemux, AviSynth, Adobe After Effects, Media Player Classic, VLC. |
| Wiki | https://en.wikipedia.org/wiki/Flash_Video | https://en.wikipedia.org/wiki/Audio_Video_Interleave |
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