Re: [FFmpeg-user] Images to video under Windows

2017-05-23 Thread Gyan 
On Tue, May 23, 2017 at 4:27 PM, Wolfgang Hugemann  wrote:

>
> In regard to the other comment: I knew that Cygwin is an option, but my
> main intent is to completely automise standard operations, such that all my
> colleagues can perform them without thinking about what happens exactly.
> Installing Cygwin on each client computer in our network would make things
> more complicated.
>

The GOW project at https://github.com/bmatzelle/gow installs native win32
ports of the common *nix utilities, including cat. Far lighter than Cygwin.
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Re: [FFmpeg-user] Images to video under Windows

2017-05-23 Thread Wolfgang Hugemann 
> This works for me in the cmd shell on Win7:
> type *.jpg | ffmpeg -f image2pipe -i - {encoding options) output.ext
> In any case, dir /b produces a listing. cat/type emit the data of the
> operands.

Thanks. This command line does the job. My problem was that I did not really 
know what exactly 'cat' does.

In regard to the other comment: I knew that Cygwin is an option, but my main 
intent is to completely automise standard operations, such that all my 
colleagues can perform them without thinking about what happens exactly. 
Installing Cygwin on each client computer in our network would make things more 
complicated.

Thanks for your hints!
Wolfgang
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Re: [FFmpeg-user] Images to video under Windows

2017-05-23 Thread Gyan 
On Tue, May 23, 2017 at 2:05 PM, Wolfgang Hugemann  wrote:

> > e.g.   cat *.jpg | ffmpeg -f image2pipe -framerate 25 -i - out.mp4
>
> Does piping really work under Windows? The Windows equivalent to 'cat'
> would be 'dir /b'. But changing the command line this way creates an error
> that basically says that the input stream is empty.
>
> I couldn't find any example for input piping with ffmpeg on Windows. Are
> you sure that it functions at all?
>
>
This works for me in the cmd shell on Win7:

type *.jpg | ffmpeg -f image2pipe -i - {encoding options) output.ext

In any case, dir /b produces a listing. cat/type emit the data of the
operands.
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Re: [FFmpeg-user] Images to video under Windows

2017-05-23 Thread Reindl Harald 



Am 23.05.2017 um 10:35 schrieb Wolfgang Hugemann:

e.g.   cat *.jpg | ffmpeg -f image2pipe -framerate 25 -i - out.mp4


Does piping really work under Windows? The Windows equivalent to 'cat' would be 
'dir /b'. But changing the command line this way creates an error that 
basically says that the input stream is empty.

I couldn't find any example for input piping with ffmpeg on Windows. Are you 
sure that it functions at all?

BTW: Is there any source of information on the specifics and limitations when 
using ffmpeg under Windows? The situation seems to be a little bit like that 
for ImageMagick, where I had to write that kind of webpage myself 
(http://www.imagemagick.org/Usage/windows)


well, the limitations of Windows are not really ffmpeg relevant itself
https://www.cygwin.com/

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Re: [FFmpeg-user] Images to video under Windows

2017-05-23 Thread Wolfgang Hugemann 
> e.g.   cat *.jpg | ffmpeg -f image2pipe -framerate 25 -i - out.mp4

Does piping really work under Windows? The Windows equivalent to 'cat' would be 
'dir /b'. But changing the command line this way creates an error that 
basically says that the input stream is empty.

I couldn't find any example for input piping with ffmpeg on Windows. Are you 
sure that it functions at all?

BTW: Is there any source of information on the specifics and limitations when 
using ffmpeg under Windows? The situation seems to be a little bit like that 
for ImageMagick, where I had to write that kind of webpage myself 
(http://www.imagemagick.org/Usage/windows).

Wolfgang Hugemann
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Re: [FFmpeg-user] Images to video under Windows

2017-05-22 Thread Bouke / VideoToolShed 
> On 22 May 2017, at 17:36, Wolfgang Hugemann  wrote:
> 
> Hey,
> 
> I have a bunch of images that I want to convert into a video. These are, 
> however, not numbered consecuitively (not like 001.jpg, 002.jpg, ...).
> 
> Well, I could make a copy of each and rename them in such a pattern, but is 
> there a more elegant way to perform the job? File name globbing is obviously 
> not supported by the Windows version. How about piping?

Hi Wolfgang,
Piping is a bad idea, it craps out after some 40 images in my experience. (Pipe 
to pipe to pipe to….)
What about creating a Cat.txt file first, and use that as input? That works for 
me just fine.
(Although the cat.txt is done outside FFmpeg…)

hth,

Bouke


> Wolfgang Hugemann
> ___
> 

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Re: [FFmpeg-user] Images to video under Windows

2017-05-22 Thread Gyan 
On Mon, May 22, 2017 at 9:06 PM, Wolfgang Hugemann  wrote:


> How about piping?
>

Pipiing or the concat demuxer can work.

e.g.   cat *.jpg | ffmpeg -f image2pipe -framerate 25 -i - out.mp4

See https://stackoverflow.com/questions/40870357/input-parameters-to-ffmpeg
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[FFmpeg-user] Images to video under Windows

2017-05-22 Thread Wolfgang Hugemann 
Hey,

I have a bunch of images that I want to convert into a video. These are, 
however, not numbered consecuitively (not like 001.jpg, 002.jpg, ...).

Well, I could make a copy of each and rename them in such a pattern, but is 
there a more elegant way to perform the job? File name globbing is obviously 
not supported by the Windows version. How about piping?

Wolfgang Hugemann
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