[MPlayer-users] SVCD from TV card

[Torsten Römer]

Just in case somebody wants to do the same as me (like putting a 
something from a videotape on a SVCD)...

I have not managed to make it work with mencoder alone, but here is a 
workaround. It's done by grabbing to an mpeg4 AVI and then "convert" it 
to mpeg2 in SVCD format using transcode:

1. Grab from TV card to mpeg4 AVI
mencoder -tv driver=v4l:width=480:height=576 tv:// -ovc lavc -lavcopts 
vcodec=mpeg4:vbitrate=2000:aspect=4/3 -oac mp3lame -lameopts cbr:br=128 
-o test.avi

2. Convert to mpeg2 in SVCD format
transcode -a 0 -x ffmpeg,mp3 -i test.avi -w 2000 -F 5,'-B 172 -I 0 -g 6 
-G 15' --export_asr 2 -b 128 -V  -f 25 -y mpeg2enc,mp2enc -E 44100 -o ttest

3. Mux the resulting files ttest.m2v and ttest.mpa to ttest.mpg
mplex -f 4 -V -o ttest.mpg ttest.m2v ttest.mpa

4. Create a SVCD from ttest.mpg using vcdimager
I'm simply using k3b for that...

The resulting SVCD's play nicely on MPlayer, Xine and my DVD Player.

Mvh
Torsten

Torsten Römer wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Hello
> 
> I am trying to encode to SVCD from the TV card. It "almost" seems to 
> work, MPlayer and Xine can play the resulting SVCD (while MPlayer hangs 
> a bit) but my DVD Player cannot play it at all (just hangs)
> 
> I encode like this:
> 
> mencoder -tv driver=v4l:width=480:height=576 tv://
>          -of mpeg
>          -ovc lavc
>          -oac lavc
>          -lavcopts vcodec=mpeg2video:vbitrate=1500:aspect=4/3:acodec=mp2
>          -o test.mpg
> 
> Then I use vcdimager to create the SVCD. Something is strange here, it 
> warns me:
> 
> ++ WARN: mpeg stream will be padded on the fly -- hope that's ok for you!
> ++ WARN: autopadding requires to insert additional 232944 zero bytes 
> into MPEG stream (due to 844 unaligned packets of 845 total)
> ++ WARN: this VCD type should not contain MPEG1 streams
> 
> Regarding the packet alignment I have no idea how to solve it. I tried 
> many options, like vrc_buf_size=917 as recommended in the manpage for 
> SVCD, but I cannot get rid of the warning.
> 
> I am also surprised about the warning that it's an MPEG1 stream, while 
> mplayer says:
> 
> VIDEO:  MPEG2  480x576  (aspect 2)  25,000 fps    0,0 kbps ( 0,0 kbyte/s)
> 
> and mpgtx tells me this:
> 
> test.mpg
>   Mpeg 2 Program Stream File [Video/Audio]
>   Muxrate : 2.11 Mbps
>   Estimated Duration: 12.23s
>   Aspect ratio 4/3 (TV)
>   Not interlaced, chroma format: 4:2:0
>   Size [480 x 576]     25.00 fps    104.86 Mbps
>   Audio : Mpeg 1 layer 2
>   224 kbps  44100 Hz
>   Stereo,  No emphasis
> 
> I am using MPlayer 1.0pre3-3.2 and tried with both ffmpeg 0.4.8 and CVS.
> 
> I also played a bit with ffmpeg's -target option but with no success.
> 
> Does anybody have an idea why my DVD Player (and also MPlayer) don't 
> like the resulting SVCD?
> 
> I created some SVCD's with transcode and mpeg2enc which works nice, but 
> it's way too slow to encode from the TV card...
> 
> Thanks in advance
> Torsten
> 
> _______________________________________________
> RTFM!!!  http://www.MPlayerHQ.hu/DOCS
> Search:  http://www.MPlayerHQ.hu/cgi-bin/htsearch
> http://mplayerhq.hu/mailman/listinfo/mplayer-users
>