[MEncoder-users] encoding to mpg

[Olive]

On Wed, 13 Oct 2010 11:18:26 +1300
Lobster <lobo at lobs.sytes.net> wrote:

>   On 13/10/2010 10:40 a.m., Olive wrote:
> >> You will always need to specify a sample/bit rate and resolution
> >> that the TV will support
> >> playback of. There is not a single "one stop shop" command line to
> >> convert your videos
> >> and depending on the source video format you likely wont keep all
> >> the characteristics of
> >> the source video as you want.
> >>
> >> If you tell us the make and model of TV we may be able to tell you
> >> what it might support
> >> and give an example command line.
> > Thank you for your answer.
> >
> > My TV is a "Lenco TV-1510" but I have not been able to find what it
> > accepts. I am a little confused why there is no possibility to keep
> > the characteristic of the original video. I had believed that there
> > was some standard codec that all TV are likely to accept (am I
> > wrong on this point?). As for the sample/bit rate is it not
> > reasonable to assume that the TV will accept everything compatible
> > with the codec?
> 
> Your right about the user manuals for  that TV not having much info
> on what codcs to use.

http://sharesend.com/6i12e


> 
> May I ask what the codecs of the source files/s are that you are 
> interested in playing?

Some various formats. For example, the site: 
http://oldcinemovies.fr/accueil_058.htm have public domain old movies,
some of them are worth watching. i would like to convert whatever they
give to me (usually mplayer <file> play the file perfectly). Also some
avi file from my digital camera. But is it really important as long as
mplayer can play them?

> 
> I also notice the TV can record to file from what you are watching.
> This may give a clue
> as to one format it will support.

This is the output of mplayer when playing a file recorded from the TV:

----------------------------------------------
MPlayer SVN-r32227-4.5.1 (C) 2000-2010 MPlayer Team
159 audio & 348 video codecs
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote
control.

Playing test.mpg.
MPEG-PS file format detected.
VIDEO:  MPEG2  720x576  (aspect 3)  25.000 fps  15000.0 kbps (1875.0
kbyte/s) Failed to open VDPAU backend libvdpau_nvidia.so: cannot open
shared object file: No such file or directory [vdpau] Error when
calling vdp_device_create_x11: 1
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2)
==========================================================================
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3 AUDIO: 48000 Hz,
2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000) Selected audio
codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample) Starting playback...
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
VO: [xv] 720x576 => 1024x576 Planar YV12 
A:   3.3 V:   3.3 A-V: -0.002 ct: -0.193  73/ 73  7%  3%  0.5% 0 0 

Exiting... (Quit)
---------------------------------------------------------

( I have also put a test (4mb) file recorded from my TV here:
http://sharesend.com/6i12e ). Actually ffmpeg -i <infile> outfile works
but I observe a very significant decrease in the quality ).


> 
> I might suggest one thing you could try to do is make a "dvd
> compliant" file and see if that
> will play.
> 
> `mencoder -ovc lavc -oac lavc -of mpeg -mpegopts format=dvd:tsaf -vf 
> scale=720:576,hardup -ofps 25 -srate 48000 -af lavcresample=48000 
> -lavcopts 
> vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9500:vbitrate=5100:keyint=15:mbd=2:trell:mv0:precmp=2:cmp=2:subcmp=3:vstrict=0:acodec=ac3:abitrate=224 
> -o outfile.mpg <inputfile>`


I have remove the option "hardup" since it gives an error. This give me
a file where the image is OK but no sound.

Many thanks,

Olive