[MPlayer-users] Problems with join/cut/split video files

[Hermann Himmelbauer]

Hi,
I am looking for a way to join/cut a video-file. To make things clear, I'll 
describe my special problem:

I have a video (video CD, MPEG1) that I want to burn on a CD, the video is 
split in two files, both files don't have errors (at least I can not hear/see 
them). The first file does not fit on a cd, so I want to first join the two 
files and afterwards split them in two, so that they both fit on one CD. 
After reading the mailinglist archives and the mplayer manpage I did it like 
that:

1) join the 2 video files:
cat file1 file2 | mencoder -ovc copy -oac copy - -o tmpfile

This already causes problems: The problem is that after the "join point" the 
video starts to flicker for about 10 seconds and the audio is completely out 
of sync, later on it gets in sync again.

My MEncoder version is "CVS-020926-18:20-2.95.3".

At the join point mencoder tells me this:
Pos:4557.1s 113371f ( 0%) 742fps Trem:   0min   0mb  A-V:-0.081 [1143:224]
duplicate 1 frame(s)!!!
Pos:4557.6s 113381f ( 0%) 742fps Trem:   0min   0mb  A-V:-0.081 [1143:224]
duplicate 1 frame(s)!!!

After the joining procedure mencoder tells me this:
Video stream: 1146.379 kbit/s  (143297 bps)  size: 1117994793 bytes  7801.920 
secs  194486 frames
Audio stream:  224.000 kbit/s  (27999 bps)  size: 211526216 bytes  7554.508 
secs

This makes me wonder why the video and audio stream do not have the same 
length?

Moreover at the end of the process mencoder outputs this:
DEMUXER: Too many (3654 in 8389584 bytes) video packets in the buffer!
Maybe you are playing a non-interleaved stream/file or the codec failed?
For .AVI files, try to force non-interleaved mode with the -ni option.
Pos:7801.9s 194486f ( 0%) 737fps Trem:   0min   0mb  A-V:-0.063 [1146:224]

I tried to add "-ni" as an parameter but this changes nothing.

2) cut the two files in half :
mencoder -ovc copy -oac copy -forceidx -endpos 699mb tmpfile -o newfile1
mencoder -ovc copy -oac copy -forceidx -ss (endpos of first file - 10s) 
tmpfile -o newfile2

This also basically works but there seems to be no index in the file although 
mencoder builds the index at first. 
Is this the right way to cut one video in 2?

		Best Regads,
		Hermann

-- 
x1 at aon.at
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