[streaming] Re: RES: Selecting certain ES while streaming

[Fleming Lampi]

Hello Isidro,

it is really simple to produce such a mp4 file. I used ffmpeg for it and 
called it with the following parameters:

ffmpeg -i "myInputVideoDV.avi" -sameq -ab 224 -acodec mp3 -vcodec h264 
-s 176x144 "myOutputVideo.mp4" -vcodec h264 -s 352x288 -newvideo -vcodec 
h264 -s 720x576 -newvideo

So myInputVideoDV.avi is just a AVI-Container using MicrosoftDV codec. 
This is what you get ouf a standard DV video camera through firewire.
-sameq is only used for triggering the VBR, maybe I should use it for 
every video stream. (not yet tested)
-ab 224 is the bitrate of the mp3 audio
-acodec mp3 sets audio codec to mp3
-vcodec h264 sets video codec to h264 (implemented by using x264)
-s widthXheight

To add the multiple elementary streams I just encode the same input file 
(there is only one given) at another size using again h264 codec. The 
option -newvideo adds a new elementary stream to the file and has to be 
the last switch after defining the parameters of the videostream to add.

You can do it similarly with -newaudio and -newsubtitle.

Hope this helps.

Regards,
Fleming.

Isidro Lopes da Silva Neto schrieb:
> Hello Mr. Fleming,
>
> I'm interested on how you have made such a composed mp4 file.
> Could you help me?
>
> Regards,
>
> Isidro. (You may write me a private e-mail via videolan forum if you prefer)
>
> -----Mensagem original-----
> De: streaming-bounce at videolan.org
> [mailto:streaming-bounce at videolan.org]Em nome de Fleming Lampi
> Enviada em: Wednesday, February 07, 2007 8:57 AM
> Para: streaming at videolan.org
> Assunto: [streaming] Selecting certain ES while streaming
>
>
> Hello everyone,
>
> I have made a mp4-file containing several x264 video elementary streams 
> (ES) and a single mp3 audio ES. In fact the video streams differ only in 
> the coded resolution.
> I am already able to stream the file using VLC even by using the 
> commandline interface, but always at the receiving VLC all video streams 
> are visible simultaneously.
>
> How can I select one single video ES and the audio ES to be streamed 
> through the network in order to reduce network load?
>
> At the moment I use VLC 0.8.5 (self compiled) for sending and VLC 0.8.6a 
> (windows binary) both on WinXPpro SP2.
> The command I use for streaming is: vlc -vvv "c:\myvideo.mp4" --sout 
> "#standard{access=udp,mux=ts,dst=224.39.38.37:1234}"
> The result is the same (with all video ES) when I use "#es{...." in the 
> commandline.
>
> Best regards,
> Fleming
>
>   

-- 
M.Sc. Fleming Lampi

Universität Mannheim
Praktische Informatik IV (Computer science IV)
A5,6  Raum B227
D-68159 Mannheim

Tel: +49 621 181 2411
Fax: +49 621 181 2601
E-Mail: lampi at uni-mannheim.de
web: http://www.informatik.uni-mannheim.de/pi4/index.html

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