[FFmpeg-devel] [PATCH] fftools/ffmpeg_opt: Add -toeof option to stop writing relative to EOF

[Morten With]

As Gyan clarified, this only affects one input file. Help text has been
modified as per Gyan's instructions (not yet submitted).

This feature was specifically requested here (and I had the same issue as
the one who opened the ticket): https://trac.ffmpeg.org/ticket/7155

I think it's a lot cleaner to just solve this with one ffmpeg command
without any external scripting math, since ffmpeg knows the duration of the
file internally anyway. Otherwise, why would -sseof exist?

Regards,
Morten

2018-06-10 19:58 GMT+02:00 Marton Balint <cus at passwd.hu>:

>
>
> On Sun, 10 Jun 2018, morten.with at gmail.com wrote:
>
> From: withmorten <morten.with at gmail.com>
>>
>> Signed-off-by: Morten With <morten.with at gmail.com>
>> ---
>> doc/ffmpeg.texi      | 4 ++++
>> fftools/ffmpeg.h     | 1 +
>> fftools/ffmpeg_opt.c | 9 +++++++++
>> 3 files changed, 14 insertions(+)
>>
>> diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
>> index 3717f22d42..fe635d0e42 100644
>> --- a/doc/ffmpeg.texi
>> +++ b/doc/ffmpeg.texi
>> @@ -488,6 +488,10 @@ see @ref{time duration syntax,,the Time duration
>> section in the ffmpeg-utils(1)
>>
>> -to and -t are mutually exclusive and -t has priority.
>>
>> + at item -toeof @var{position} (@emph{input})
>> +Stop writing the output at @var{position} relative to the "end of file".
>> That is negative
>> +values are later in the file, 0 is at EOF.
>>
>
> end of file is misleading, you are simply using the input duration as far
> as I see. So write that in the help text. Also what happens if the output
> is generated from multiple inputs?
>
> Also I am not sure your use case needs a separate option. Anybody willing
> to use this in an automated way can also get the input duration with
> ffprobe and use the good old -timestamp option to achieve the same result.
>
> Regards,
> Marton
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>