How can I convert AVI files into MPGs with ffmpeg?

ffmpeg avi file-conversion

Solution 1

mpeg instead of mpg

ffmpeg -i file.avi -vcodec mpeg4 -f mpeg output.mp4

Solution 2

Thanks to Andreas Cadhalpun ffmpeg now has new filter: mpeg4_unpack_bframes (see ref).

Usage is as simple as:

ffmpeg -i INPUT.avi -codec copy -bsf:v mpeg4_unpack_bframes OUTPUT.mpg

Solution 3

I'd use MPEG Streamclip. It's really simple. Although they haven't updated the software in a while, I've been using the same version for years (most recently on my Intel Mac with OS 10.6.6). It's good for individual files. Not sure about batching. Good luck.

MPEG Streamclip is a powerful free video converter, player, editor for Mac and Windows. It can play many movie files, not only MPEGs; it can convert MPEG files between muxed/demuxed formats for authoring; it can encode movies to many formats, including iPod; it can cut, trim and join movies. MPEG Streamclip can also download videos from YouTube and Google by entering the page URL.

Rodrigo Amaro

Updated on September 17, 2022

Comments

Rodrigo Amaro almost 2 years
I'll try to be very specific. Look, I have an input that sends an array:
```
echo "<input type='hidden' name='valortot[]'  class='valor$rowid' disabled>";
```
Once I click in a radio button the disable is removed and the value is set:

Radio button:
```
<input  class='radio$rowid'  name='".$codintercot."[]' value='$mpreco' type='radio' onclick='calcval($rowid,$valortot)'>
```
$rowid is the id of each row and $valortot is the value got by javascript and once clicked is insert in the hidden input.

The Javascript:
```
 <script type="text/javascript">

             function calcval(valor,valortot){

                var valortot = valortot;
                var rowid = valor;
                var calcval = document.getElementsByClassName("valor"+rowid);

                for(var i = 0; i < calcval.length; i++) {
                    calcval[i].value=valortot;
                    calcval[i].disabled = false;
                }


             }
```
My problem is, when I send the array they're copied, duplicates can exist, like 2 itens with the same value, but not a copy next the value like this:
```
Array ( [0] => 2.44 [1] => 2.44 [2] => 3.7 [3] => 32.92 [4] => 32.92 )
```
It's odd, 2.44 and 32.92 were copied but not 3.7, how can I skip clones?

EDIT:

Oh I fould, I was enabling 3 at same time while I should just enable 1. But still thank you guys.
- slhck over 13 years
  
  Have you tried repairing the file? ffmpeg -i infile.avi -acodec copy -vcodec copy outfile.avi
- xralf over 13 years
  
  Yes, outfile.avi has the same problem.
xralf over 13 years

This writes error message: Unknown encoder 'aac'
xralf over 13 years

I'm on Linux (Ubuntu).
jet over 13 years

I edited my answer - try
xralf over 13 years

This writes: Error while opening codec for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height
jet over 13 years

ffmpeg -i file.avi -vcodec mpeg4 -s 320x240 -b 300k -r 23.98 -acodec libmp3lame -ar 48000 -ab 112k output.mp4 - you can play with size and bitrate
xralf over 13 years

The same error.
parsecer about 3 years

I get buffer underflow error. When it finished converting, the video works, but there is no sound