Sape,
Monty's version of Cinelerra uses FFMPEG as the media importer. So, the
best way to test if your files give any kind of error is to use FFplay
to play them back.
scott
On Sat, 2011-01-15 at 17:23 +0100, Sape Sikkema (wxs.nl) wrote:
> 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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