[Libav-user] ffmpeg on android - cannot write output file

[wm4]

On Fri, 13 Feb 2015 10:22:46 -0600
Cen-bi Liu <cenbiliu at gmail.com> wrote:

> yes.
> 

How about open(filename, O_CREAT | O_WRONLY | O_CLOEXEC, 0666)? This is
approximately what libavformat calls. You can also check strace output.

> On Fri, Feb 13, 2015 at 10:19 AM, wm4 <nfxjfg at googlemail.com> wrote:
> 
> > On Fri, 13 Feb 2015 10:08:29 -0600
> > Cen-bi Liu <cenbiliu at gmail.com> wrote:
> >
> > > Hi all,
> > >
> > > I'm new to ffmpeg and trying to use ffmpeg as a shared library in Android
> > > to convert PCM to an .mp4 file by following tutorials.
> > >
> > > I hit a snag in my openOutputFile function, I have the following which
> > has
> > > given me an error (passing in "/sdcard/a.mp4" for filename):
> > >
> > > if ((error = avio_open(&output_io_context, filename,
> > >                        AVIO_FLAG_WRITE)) < 0) {
> > >     __android_log_print(ANDROID_LOG_ERROR, "encoder","couldn't open
> > > output file");
> > >     exit(1);}
> > >
> > > My configure for ffmpeg compilation is as follows:
> > >
> > > ./configure \--prefix=$PREFIX \--enable-demuxer=mov
> > > \--enable-muxer=mov \--enable-libvpx \--enable-libvorbis
> > > \--enable-protocol=file \--enable-shared \--disable-static
> > > \--disable-doc \--disable-ffmpeg \--disable-ffplay \--disable-ffprobe
> > > \--disable-ffserver \--disable-avdevice \--disable-symver
> > > \--cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi-
> > > \--target-os=linux \--arch=arm \--enable-cross-compile
> > > \--sysroot=$SYSROOT \--extra-cflags="-Os -fpic $ADDI_CFLAGS"
> > > \--extra-ldflags="$ADDI_LDFLAGS" \
> > >
> > > When searching, I have come across others' experiencing similar issues
> > and
> > > added the --enable-protocol=file and --enable-muxer=mov when compiling
> > > ffmpeg. I did add the permissions to external storage in the manifest.xml
> > > file. Please let me know what you think.
> > >
> > > Cheers,
> > >
> > > Cen
> >
> > Does fopen() work?
> > _______________________________________________
> > Libav-user mailing list
> > Libav-user at ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/libav-user
> >
> 
> 
>