[FFmpeg-user] Timecode Burnin with negative start

[Bouke (VideoToolShed)]

From: "betonpfeiler" <betonpfeiler at googlemail.com>
To: <ffmpeg-user at ffmpeg.org>
Sent: Thursday, June 20, 2013 12:59 AM
Subject: Re: [FFmpeg-user] Timecode Burnin with negative start


> Am 19.06.2013 00:16, schrieb Wayne Poll:
>> You could try starting the T/C at 23:59:56:00  :-)
>>
>> Wayne Poll | Technical & IT Systems Manager |
>> NHNZ | 5 Melville Street, Dunedin 9016, New Zealand |
>>
>>
>> -----Original Message-----
>> From: ffmpeg-user-bounces at ffmpeg.org 
>> [mailto:ffmpeg-user-bounces at ffmpeg.org] On Behalf Of betonpfeiler
>> Sent: Wednesday, 19 June 2013 10:07
>>
>> Halle Everyone!
>>
>> I need to make a timecodeburnin to a video and add a 4sek pre-roll. I was 
>> able to do the burnin, but the timecode needs to be zero at the first 
>> frame after the pre-roll. Is there any way to start the timecode at a 
>> negative time and count up? So that the timecode starts at 
>> "-00:00:04:00". Is that possible?
>>
>> Thanks!
>>
>> >>
>
> I really liked that idea, simple yet elegant... sadly, ffmpeg keeps 
> counting up, even at 99:59:56:00 ffmpeg jumps to 100:00:00:00...
>
> But thanks for the idea!

You could try Avisynth, perhaps you have better luck there.
What definitly would work (with a bit more hassle, use bitmaps with alpha 
(perhaps using a conditional reader, or whatever you need to get them in the 
correct order) and Avisynth.
Or, do it the traditional way, and put a leader clip before the show.

Bouke

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