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 Forum index » Off-Topic Area » Programming
2> redirect won`t work in file or in rxvt run in file.
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technosaurus


Joined: 18 May 2008
Posts: 4745
PostPosted: Sat 18 Dec 2010, 20:09    Post subject:  
you _shouldn't_ see anything on the command line if you are redirecting stderr to a file because ffmpeg sporadically uses write(2,...) to output a lot to stderr, vice the traditional stdin which is write(1,...)

I don't know their reasoning for this - just that it makes it a PITA to parse the output.

piping through cat seems to work though

ffmpeg [parameters] 2>/dev/stdin |cat > [file]
or the equivalent
ffmpeg [parameters] 2>&1 |cat > [file]

if you want also to _see_ the output use tee instead of cat
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Web Programming - Pet Packaging 100 & 101
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sunburnt


Joined: 08 Jun 2005
Posts: 5083
Location: Arizona, U.S.A.
PostPosted: Sat 18 Dec 2010, 22:41    Post subject:  
Success!! Thanks technosaurus!

The problem... I had the code for this in a function, I put it in the main code...
Now I`m thinking some of the other suggestions will work also...
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jpeps

Joined: 31 May 2008
Posts: 3217
PostPosted: Sat 18 Dec 2010, 23:00    Post subject:  
technosaurus wrote:

ffmpeg [parameters] 2>&1 |cat > [file]

if you want also to _see_ the output use tee instead of cat

without the redirection symbol 'tee file'
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sunburnt


Joined: 08 Jun 2005
Posts: 5083
Location: Arizona, U.S.A.
PostPosted: Sun 19 Dec 2010, 02:27    Post subject:  
Speech codecs: amr, vpx, speex, and z and bz filtered out of the GUI list.
And the video and audio codecs are separated into two lists.

I don`t see a codec for Mpeg 2, is it still illegal to have it without paying?
And I don`t see the Flash codec, it`s popular (web) but it`s loosing favor I hear.
How about codecs for Ipod, PSP, and other portable video devices?
Are there any other codecs I should be looking for? wma, wmv, mp4, mov, etc.?

Thanks guys... Now I need to write code to make the GUI`s varying radio boxes.
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big_bass

Joined: 13 Aug 2007
Posts: 1742
PostPosted: Thu 23 Dec 2010, 19:41    Post subject:  
Quite a few people posted here with good info
but I took this as a puzzle only (I like puzzles) and was bored Very Happy
since this thread was solved but that -e command still bugged me

its easy without the -e
that changes how the command line is read
giving you a named window


I got this one to work

Code:
 xterm -hold -e  "ffmpeg  | cat >/tmp/4"




I saw that amigo said to use the " " around the command and
piping to cat from technosaurus

but with rxvt it wouldnt work ?
Joe
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