Dear forum members
Last time I reported my problem nearly solved, but unfortunately I'm
back where I started from.
A small recap:
I have a JVC Everio HD camera that makes MOD files. I used modcopy to
convert them to mpg (and a more sensible name with the format
MOV-[YearMonthDate-HourMinuteSecond].MOD). When I imported these clips
in Cinelerra I often encountered jerky movements in the compositor
window that would also end up in the rendered output file.
Scott made me aware that Cinelerra 2.1.5 with Chris Montgomery's patches
can also read MOD files. So I compiled this version have it up &
running. So far so good.
Now, since my movie contains 700 clips I decided to replace all .mpg
with .MOD in the XML file and replace all modcopied .mpg clips with
straight copies from the camera's .MOD files with the following script
(in order to save the effort of replacing the 700 full file names in the
xml file):
#1 bin/bash
mkdir renamed
for i in *.MOD; do date_mod=`ls -l --time-style='+%Y%m%d-%H%M%S' $i |
awk '{print $6}'` ;cp $i renamed/MOV-"$date_mod".MOD ; done
exit;
Somehow here goes something wrong:
1. While the original e.g. MOV03C.MOD plays correctly in the compositor,
the terminal window shows numerous error codes like:
[mpeg @ 0x4295240]invalid dts/pts combination
[mpeg2video @ 0x2457260]warning: first frame is no keyframe
The first four frames are black, while the last frame is at 5.240 sec.
In Avidemux the file is 127 frames (5.120 sec), the Check Frames
function says "no error found".
2. In Cinelerra compositor, the copied file MOV-20081003-073428.MOD
again shows jerky movements, but the error messages do no longer appear.
the clip is now 5.000 sec long. There are no black frames at the front
anymore. In Avidemux the file is also 127 frames (5.120 sec), the Check
Frames function says "no error found".
3. I also (randomly) find copied files that play correctly with keyframe
errors, just like the original.
I get the impression that the copy command triggers a repair mechanism
that deletes the black frames.
Question: what (external?) player does Cinelerra with Monty's patches
use? Is it possible to run this player independently?
Has anyone a clue what's going on here? does the JVC camera make crap
files? Again, in all other players I see no defect in any version or
copy, it is only Cinelerra Compositor and the rendered output.
For the ones who want to check themselves I uploaded an example of
original and copied file on
https://www.strongspace.com/shared/lex2k41pvt
Best regards,
Sape
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