Hilo,
Maybe try something other than avidemux2...
A little while ago I was having problems with dvbcut to edit ts
straight from recording, and saving it as dvd mpeg.
It started playing up, and then someone suggested I try ProjectX,
Which will let you edit and then output demuxed audio and video.
Then all I do is transcode to whatever I want with the audio and
video plumbed back in together again.
It is easy to use though not frame by frame concise for editing, and
works pretty well for me...
A second thanks to the transcode list participant who put me on to it.
On 28 Mar 2007, at 14:05, Maik Holtkamp wrote:
Hi,
0n 07/03/[EMAIL PROTECTED]:48 Torsten Mohr told me:
i capture some TV broadcasts with my Hauppauge PVR350 and the ivtv
driver.
AFAIK PVR already delivers a perfect mpeg2 program stream.
I then cut those sequences with "avidemux2" and write them as AVI,
settings
video: MJPEG, audio: WAV PCM.
*Huch*, mjpeg != mpeg
^
mjpeg is more or less a jpg images slideshow running fast enough to
let you think it's a movie ;). Every single picture is stored in
mjpeg making it probably good for cutting but it's a waste of bits.
That format has nothing to with mpeg used for DVD. mpeg2-ps as used
on dvd only stores every 15th picture (I-frame) in total and the
other pictures just describe the differneces to this "master frame".
It's probably somewhat harder to cut it, but a lot better in saving
bits.
The stream you receive from your 350 is mpeg2-ps, just that sort of
thing you need for dvdauthoring. Use avidemux just for cutting and
dvdauthor to get it to dvd. transcoding shouldn't be envolved in
your production process.
I try to convert this output to MJPEG compatible DVD with this
command:
There is no mJpeg compatible format for DVD.
[1]
transcode -k -i $in -o $out -xlav -yffmpeg,lame -Fmpeg2video -w 4000
mp3 (lame) isn't allowed on dvd, too.
mplex -o $out -f8 $video $audio
mplex should have warned you as mp3 doesn't meet -f 8.
Playing the output file with MPlayer works fine, but when i feed
it to
mplayer eats almost everything, but your hardwarebox wouldn't
dvdauthor it complains on every frame:
WARN: unknown mpeg2 aspect ratio 1
WARN: Discontinuity in audio channel 8; please remultiplex input
Playing the DVD on a DVD player leads to missing sound.
For DVD-video mp3 isn't an Option.
I tried to remultiplex this way:
[2]
tcextract -i $in -x mpeg2 > $video
tcextract -i $in -x mp3 > $audio
mplay -o $out -f8 $video $audio
s/ay/ex/ ?
What do i need to do to get DVD compatible output?
Just skip the transcoding step.
When i use avidemux2 to cut MPEGs on I-Frames i can create DVDs using
method [2]. But when i cut MPEGs not directly on I-Frame borders
i need to output AVI (MJPEG, WAV). Converting this to DVD MPEG
fails.
I am not familiar with avidemux, but it should be able to reencode
the sceens around your cutting point to meet specs again. If it
can't don't cut at P or B frames or use a different tool. IIRC there
was a command line tool out there which can cut mpeg2 content
exactly even at P or B frames.
Again there is no need to transcode your content. Dunno if it will
be visible, but you will loose quality be transcoding.
HTH
--
bye maik
