Forum user: montajesberiain

to MUX a video stream from AVI to MP4 using the following command:
Code:

ffmpeg-i input.avi-vcodec copy output.mp4

Note that ffmpeg seems to only put mpeg-4 streams in MP4 correctly when the files using a 4CC as ffmpeg know that MPEG-4
Therefore, if you want to mux 3ivx, streams ffvfw or nero digital you have to change their 4ccs to DIVX or XVID first!

also important to note is that ffmpeg isn't can delete AVI hack! I'm sure most of you already know AVI need some hackery to handle MPEG-4 (b-frames), is the most important thing a packed bitstream, a private solution introduced DivX5 and now also in xvid.
Of course no one can expect MP4 muxer developers to learn Private, non-standard hack, to make the old container work, and therefore, ffmpeg, like many other muxers (mp4ui, mp4creator) doesn't remove these hacks

to make it short: dont mux AVI files with packed bitstream b-frames (used by default in DivX5 and XviD) with ffmpeg, it will produce mp4 files are not spec compliant! use 3ivx instead mux these files!reparacion de maquinaria

1 Install Ant. Instructions
2 Download Adobe Flex 3 SDK.
3 Unzip the Flex 3 SDK that you just downloaded.
% unzip flex_sdk_3.zip
4 Download the Flowplayer development kit.
5 Unzip the Flowplayer development kit.
% upzip flowplayer.devkit-3.0.3.zip
6 Edit the plugin-build.properties file in the Flowplayer development kit. Specifically edit the line that says:
flex3dir=/Users/api/flex3sdk
to point to the location to which you unzipped the Flex 3 SDK. After editing my file looks like this:
flex3dir=/Users/anil/Desktop/flex_sdk_3
7 Navigate to the example plugin that is contained within the Flowplayer development kit. For me this is located here:
/Users/anil/Desktop/flowplayer.devkit/example
8 Finally, type:
% ant
The output should look like this:

Buildfile: build.xml

build:
[echo] ++ flowplayer.helloworld.swf +++
[echo]
[echo] checking if flowplayer.helloworld.swf is uptodate
[echo] main up-to-date: ${uptodate.main}

prepare:
[unzip] Expanding: /Users/anil/env/flowplayer.devkit/flowplayer.swc into
/Users/anil/env/flowplayer.devkit/example/build

check-compile-dirs:

check-compile-dirs2:

compile:
[exec] Loading configuration file
/Users/anil/Desktop/flex_sdk_3/frameworks/flex-config.xml
[exec] /Users/anil/env/flowplayer.devkit/example/build
/flowplayer.helloworld.swf (1304 bytes)
[copy] Copying 1 file to /Users/anil/env/flowplayer.devkit/example/build

BUILD SUCCESSFUL
reparacion de maquinas