[streaming] Re: Crontab and VLC

[Nils-Odd Solberg]

well,
i have used -I dummy for a while and it works fine :) i send a "kill -s  
2 $nr" where nr are
`/sbin/pidof vlc` so the exiting are not the issue. anyway; thanks  
again.

but i still have problems. i got errors when trying to transcode the  
audio to mp3 (i wish it was possible with aac, but it isn't so the mp3  
is the nest best thing). the reason why i'm stressing this is that i in  
addition to multicast realtime i also should do an on deman rtsp  
streaming so then i need hinted .mp4 files..

can someone tell me what's going wrong or what i do wrong? i have  
pasted in some stuff below here

* ffmpeg configure sentence

./configure --enable-mp3lame --enable-vorbis --enable-faad --enable-pp

* vlc 0.6.2 configure sentence

./configure --enable-v4l --enable-ffmpeg  
--with-ffmpeg-tree=/home/nilsodd/downloads/vlc/ffmpeg-20030813  
--with-ffmpeg-mp3  --enable-faad --enable-xvid  
--with-xvid-tree=/home/nilsodd/downloads/vlc/xvidcore-0.9.2

* vlc output when trying acodec=mp3

[nilsodd at rod3 nilsodd]$ vlc  
v4l:/dev/video0:norm=pal:size=704x576:adev=/dev/audio:audio=1 --sout  
'#duplicate{dst="transcode{vcodec=mp4v,acodec=mp3,vb=4000,ab=256,vt=8000 
00,keyint=80}:std{access=udp,mux=ts,url=224.1.2.3: 
20000}",dst="transcode{vcodec=mp4v,acodec=mp3,vb=500,ab=128,vt=800000,ke 
yint=80}:std{access=http,mux=ts,url=rod3.hiof.no:8080}"}' --ttl 15
VideoLAN Client 0.6.2 Trevelyan
[00000156] main input: playlist item  
`v4l:/dev/video0:norm=pal:size=704x576:adev=/dev/audio:audio=1'
remote control interface initialized, `h' for help
[00000156] v4l input: v4l grabbing started
[00000164] access_output_udp private: Open: addr:`224.1.2.3'  
port:`20000'
[00000169] access_output_http private: creating new http daemon
[00000171] httpd private: httpd started
[00000170] httpd private: http thread launched
[00000162] stream_out_transcode private error: cannot find encoder  
(avcodec)
[00000162] stream_out_transcode private error: cannot create audio chain
[00000167] stream_out_transcode private error: cannot find encoder  
(avcodec)
[00000167] stream_out_transcode private error: cannot create audio chain
[00000159] packetizer_copy decoder error: cannot add a new stream

* ffmpeg capturing video

[nilsodd at rod3 nilsodd]$ ffmpeg -ad /dev/audio -vd /dev/video0 -ab 256  
-b 4000 -t 30 -vcodec mpeg4 -acodec mp3 -s 704x576 -f avi  
~/ffmpeg_07112003.avi
Input #0, video4linux, from '':
   Duration: N/A, bitrate: N/A
   Stream #0.0: Video: rawvideo, yuv420p, 704x576, 25.00 fps
Input #1, audio_device, from '':
   Duration: N/A, bitrate: N/A
   Stream #1.0: Audio: pcm_s16le, 44100 Hz, mono, 705 kb/s
Output #0, avi, to '/home/nilsodd/ffmpeg_07112003.avi':
   Stream #0.0: Video: mpeg4, 704x576, 25.00 fps, q=2-31, 4000 kb/s
   Stream #0.1: Audio: mp3, 44100 Hz, mono, 256 kb/s
Stream mapping:
   Stream #0.0 -> #0.0
   Stream #1.0 -> #0.1
Press [q] to stop encoding
frame=  750 q=5.0 size=   15804kB time=30.0 bitrate=4315.5kbits/s

* dump of the contents in the avi-file

[nilsodd at rod3 nilsodd]$ avidump ffmpeg_07112003.avi
avidump - mpeg4ip version 0.9.9
ffmpeg_07112003.avi
Video Information
    Video compressor: DIVX
    Video frame rate: 25
    Number of frames: 750
    Video height    : 576
    Video width     : 704
Audio information:
    Audio channels: 1
    Audio bits/sample: 0
    Audio format: 85 MP3
    Audio sample rate: 44100
    Audio bytes: 960004

* trying to make an .mp4 file

[nilsodd at rod3 nilsodd]$ mp4creator -create=ffmpeg_07112003.avi -I  
ffmpeg_07112003.mp4
mp4creator: data in file doesn't appear to be valid mp3 audio

* trying to save to an avi file

[nilsodd at rod3 nilsodd]$ vlc  
v4l:/dev/video0:norm=pal:size=704x576:adev=/dev/audio:audio=1 --sout  
'#transcode{vcodec=mp4v,vb=4000,acodec=mpga,ab=256,vt=800000,keyint=80}: 
std{access=file,mux=avi,url=vlc_07112003.avi}'

* trying to dump the contents in the avi-file

[nilsodd at rod3 nilsodd]$ avidump vlc_07112003.avi
avidump - mpeg4ip version 0.9.9
avidump: error vlc_07112003.avi: avilib - AVI file has no MOVI list  
(corrupted?)

nils-odd
--
nils.o.solberg at hiof.no
http://www.ia-stud.hiof.no/~nilsosol/
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