To anyone who cares, this is a great step by step guide to converting an mpeg2 into a vcd compliant mpeg1. It works great!
Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You!Thank You! Jesse On Tue, 2002-12-10 at 17:39, Scott Zuk wrote: > On December 9, 2002 11:19 pm, Jesse Kline wrote: > > > I also tried the other example on the transcode site using the bbmpeg > > interface ( transcode [...] -V -y mpeg -F v,4 -E 44100 -b 224 -o test ). > > This seemed to work fine, but I ended up with videos that had serious > > A/V sync issues. I tried using both tcmplex and mplex but I had the same > > problem with both. > > Well, if transcode managed to produce a valid MPEG1 video and audio stream you > might be able to use the mplex -O SYNC option where SYNC is a positive or > negative value in milliseconds to fine tune the A/V sync. > > > It seems as though the script is now called mpegtranscode although the > > documentation refers to mjpegtranscode (I'm using mjpegtools 1.6). I > > installed all the dependencies and following the instructions but it > > kept passing bad options to mpeg2dec. I even installed the mjpegtools > > patched version of mpeg2dec. It was complaining that it didn't support > > YUVh, so I edited the mpegtranscode script and changed it to xv. > > I was messing around with this last night and had similar problems at first. > What I had to do to get mpeg2dec to work was to install the mjpegtools-dev > package before doing a "./configure --prefix=/usr/local/ && make && make > install" on the patched version of mpeg2dec. If the configure script outputs > the following line, then mpeg2dec should allow YUV output: > > checking for mjpegtools-config... (cached) yes > > I then ran the following to extract and convert the video stream from MPEG2 to > a VCD compliant MPEG1: > > $ mpeg2dec -s -o YUV original.mpg | yuvscaler -O VCD | mpeg2enc -f 1 -r 16 -o > video_vcd.m1v > > You might need the complete path to mpeg2dec if /usr/local/bin isn't in your > path. > > I tried to extract the audio stream using extract_ac3 but it wouldn't work for > some reason. No matter, instead I used mplayer to dump the decoded audio > into a raw pcm file like so: > > $ mplayer -vc null -vo null -ao pcm -aofile audio.pcm original.mpg > > ...and then encoded that into an mp2 audio stream: > > $ cat audio.pcm | mp2enc -V -v 2 -o audio_vcd.mp2 > > At this point you _should_ have seperate playable video and audio streams. > Multiplex them together with mplex to create a single stream: > > $ mplex -f 1 -O SYNC_VALUE audio_vcd.mp2 video_vcd.m1v -o vcd_stream.mpg > > Substitute different values for SYNC_VALUE if A/V sync is off and then create > the VCD image: > > $ vcdimager -v -l LABEL vcd_stream.mpg > > Use a volume label ( all caps, numbers and underscores allowed ) if you plan > on playing the VCD on different computer platforms, linux doesn't care but > windows might think the cd is empty if there is no label. > > I did all this with a sample mpeg2 SVCD stream and it seemed to work out ok. > If it doesn't work for you I'm afraid I'm all out of ideas. Good luck. > > ~Scott
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