[mythtv-users] nuvexport --sequence-length and auto-splitting
steven.cruysberghs at pi.be
Sun Jun 13 11:45:48 EDT 2004
If i remember correctly when you burn (s)vcd CD's no CRC error checking
is used so you can fit 800 mb mpeg files on a 650 mb (s)vcd.
Op zo 13-06-2004, om 16:21 schreef Ramon Redondo:
> I've been a big fan of using nuvexport to create SVCD images intended to
> fit on a CD-R. However, I've always been manually tweaking bitrates
> until whatever I was exporting would fit on a single CD. I would look
> at the file size and if it was too large, I would cut down the bitrate.
> Well, slow as I am I finally noticed a few of things:
> 1) mplex will automatically attempt to split a file based on the
> 'sequence-length' used on the ffmpeg command-line from the previous step.
> 2) nuvexport is setting this sequence-length to 795MB.
> 3) Splitting of the file will fail if there is no '%d' in the title fed
> to mplex, leaving you with the max file size, and throwing out the rest
> of your video.
> Is there a reason that nuvexport sets this sequence length so high? Am
> I the only one still using 74 minute (650MB) CDRs? I have an ancient CD
> burner which doesn't seem to work with larger discs.
> Would you have any objection to adding this as a configurable option
> (both in the menus and the command line)?
> It probably would be worth noting that the sequence size seems to be
> based solely on the video size, so 795MB plus a related 192kb audio
> stream would end up around 811MB.
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