[Libav-user] Unknown decoder 'copy' = avcodec_find_decoder_by_name("copy") returning 0 on iOS

[Wagner Patriota]

ok, the thing is that I am adapting from ffmpeg.c, like renaming
main(argc,argv) -> ffmpeg(argc,argv) and using this function with the
parameter I want... so it's supposed to have the same behavior of the
command line... is there any problem with it?

On Thu, May 10, 2012 at 12:25 PM, Alex Cohn <alexcohn at netvision.net.il>wrote:

> On Thu, May 10, 2012 at 6:18 PM, Wagner Patriota
> <wagner.patriota at gmail.com> wrote:
> > sorry, I forgot something... the equivalent ffmpeg command is:
> >
> > ffmpeg -i input.mp4 -acodec copy output.ts
> >
> >
> > On Thu, May 10, 2012 at 11:47 AM, Wagner Patriota
> > <wagner.patriota at gmail.com> wrote:
> >>
> >> Hello... I compiled for iOS with the following parameters:
> >>
> >> [in this case, for simulator]
> >> ./configure \
> >>
> >>
> --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc
> >> \
> >> --as='/usr/local/bin/gas-preprocessor.pl
> >>
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc'
> >> \
> >>
> >>
> --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk
> >> \
> >> --target-os=darwin \
> >> --arch=i386 \
> >> --cpu=i386 \
> >> --extra-cflags='-arch i386' \
> >> --extra-ldflags='-arch i386 -isysroot
> >>
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk'
> >> \
> >> --prefix=compiled/i386 \
> >> --enable-cross-compile \
> >> --enable-nonfree \
> >> --enable-gpl \
> >> --enable-postproc \
> >> --enable-avfilter \
> >> --disable-armv5te \
> >> --disable-ffplay \
> >> --disable-ffserver \
> >> --disable-ffprobe \
> >> --disable-doc \
> >> --disable-debug \
> >> --disable-neon \
> >> --disable-pic \
> >> --disable-asm
> >>
> >>
> >> when I get to avcodec_find_decoder_by_name("copy") ... it returns 0...
> >>
> >> I am doing the equivalent of doing "ffmpeg -i input.mp4 output.ts"
> >>
> >> any ideia of what is happening?
>
> "copy" is a placeholder for not running codec at all. In your program
> that implements this logic, you should "short-circuit" the demuxer and
> the muxer. Note that in some cases, you cannot avoid running the video
> codec, because it is the way to extract global headers, etc.
>
> BR,
> Alex Cohn
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> Libav-user at ffmpeg.org
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>
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