Re: [FFmpeg-user] Troube with piping into ffmpeg and fast seeking

[Cley Faye]

2017-01-07 23:44 GMT+01:00 expenses :

> For example:When I run the above
> command
>

​I believe you forgot a critical part in your message :)

You should post the full command, and full output produced.
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Re: [FFmpeg-user] Troube with piping into ffmpeg and fast seeking

[Moritz Barsnick]

On Sat, Jan 07, 2017 at 14:44:01 -0800, expenses wrote:
> command I receive a couple of warning and errors:And nothing is output.

And you were going to keep these warnings and errors a secret? Or you
believe they don't mean anything?

Please show us the actual ffmpeg command line you used, and its
complete, uncut console output.

Moritz
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Re: [FFmpeg-user] Troube with piping into ffmpeg and fast seeking

[expenses]

Sorry about the way that formatted in email form. I used 'raw' tags on the
website to indicate code.



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[FFmpeg-user] Troube with piping into ffmpeg and fast seeking

[expenses]

Hi, I'm having trouble piping into ffmpeg with fast seeking on several
videos, for example,  this one    ('Download file'
under 'more').What I'm trying to do is to pipe some video in, seek to a
specific point and write out a frame. This is written in python, but my
problem is the same using the command line.For example:When I run the above
command I receive a couple of warning and errors:And nothing is output.
However, if I use output seeking instead, with:out.jpg is written to as
expected, and just the pixel format warning is shown.

What's going on here? Note that it seems to have problems on only some
videos but not others (I haven't found a pattern but it seems to work better
on .webms than .mp4s). Given that output seeking is so much slower than fast
seeking, it really isn't practical for me to use it instead.

I'm on OSX 10.11, but I had the exact same problem on a Raspberry Pi 2
running Arch Linux.



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