[FFmpeg-user] ffplay and j2k

[Donald McLachlan]

On 07/02/2012 4:27 PM, Carl Eugen Hoyos wrote:
> Donald McLachlan<Donald.McLachlan<at>  crc.ca>  writes:
>
>> [j2k @ 0x140e3c0] only LRCP progression supported
> This means you need libopenjpeg for this image,
> the native decoder only has limited features.
>
> (Install libopenjpeg, then configure with --enable-libopenjpeg)

Hi Carl,

Thanks.  I have downloaded, built and installed the latest libopenjpeg 
tarball (using the cmake commands).
I rebuilt ffmpeg with make clean, ./configure --enable-libopenjpeg, 
make, and make install.
And I got the exact same results.

How can I verify that libopenjpeg is actually being used?

ldd ffplay does not list libopenjpeg.
grepping the  ffmpeg Makefiles reveals:

    ./libavcodec/Makefile: OBJ-$(CONFIG_LIBOPENJPEG_DECODER) += 
libopenjpegdec.o
    ./libavcodec/Makefile: OBJ-$(CONFIG_LIBOPENJPEG_ENCODER) += 
libopenjpegenc.o

grepping the output of nm -g ffplay_g for jpeg shows lots of symbols 
starting with ff_

Is there a symbol I can look for to verify that libopenjpegenc.o and 
libopenjpegdec.o have actually been included and are being called?

Any other things I can try?

Thanks,
Don