[FFmpeg-user] Building FFmpeg with OpenJPEG 2.0

[Aaron Boxer]

Sorry for spamming this group, but I finally figured this out - compile and
link work fine now:

$ ./configure --enable-libopenjpeg
--extra_cflags="-DHAVE_OPEN_OPENJPEG_2_1_OPENJPEG_H"



Now, from  the ffmpeg -h command,  it looks like openjpeg is used for
encoding, while ffmpeg j2k is used for decoding.

Is this correct ?


Thanks!
Aaron



On Wed, Mar 23, 2016 at 11:27 AM, Aaron Boxer <boxerab at gmail.com> wrote:

> I spoke too soon: compile is working, but linking fails. I guess I need
> that check in the configure file after all....
>
>
>
>
> On Wed, Mar 23, 2016 at 10:40 AM, Aaron Boxer <boxerab at gmail.com> wrote:
>
>> OK, figured this one out. Thanks to everyone who helped.
>>
>> Here is what I had to do:
>>
>> 1. Install latest OpenJPEG from source (version 2.1)
>> 2. remove check for openjpeg library from configure script
>> 3. $ ./configure --enable-libopenjpeg
>> --extra_cflags="-DHAVE_OPEN_OPENJPEG_2_1_OPENJPEG_H"
>> 4. manually edit config.h and change
>> #define HAVE_OPEN_OPENJPEG_2_1_OPENJPEG_H 0
>> to
>> HAVE_OPEN_OPENJPEG_2_1_OPENJPEG_H 1
>> 5. make
>>
>> Perhaps someone who understands FFmpeg configuration can advise on how to
>> improve this.
>>
>> Cheers,
>> Aaron
>>
>>
>> On Wed, Mar 23, 2016 at 10:05 AM, Paul B Mahol <onemda at gmail.com> wrote:
>>
>>> On 3/23/16, Aaron Boxer <boxerab at gmail.com> wrote:
>>> > On Wed, Mar 23, 2016 at 9:31 AM, Reindl Harald <h.reindl at thelounge.net
>>> >
>>> > wrote:
>>> >
>>> >>
>>> >> Am 23.03.2016 um 14:22 schrieb Aaron Boxer:
>>> >>
>>> >>> On Tue, Mar 22, 2016 at 4:52 PM, Reindl Harald <
>>> h.reindl at thelounge.net>
>>> >>>
>>> >>>> *where* doe soyur build install stuff?
>>> >>>>
>>> >>>> nothing renames anything - path orders are relevant
>>> >>>> in doubt *tell* ffmpeg where it has to seek!
>>> >>>>
>>> >>>> --extra-ldflags may be your friend
>>> >>>>
>>> >>>
>>> >>> I install OpenJPEG library into /usr/local/lib
>>> >>> and header into /usr/local/include
>>> >>>
>>> >>> Unfortunately, it doesn't look like FFmpeg is finding them
>>> >>>
>>> >>
>>> >> did you tell it to look there?
>>> >> what was unclear in "--extra-ldflags may be your friend"?
>>> >>
>>> >> *how* does you full configure-line looks like?
>>> >>
>>> >> i really don't understand why you are not posting full informations
>>> what
>>> >> is installed where and your configure line from the very first start -
>>> >> http://www.catb.org/esr/faqs/smart-questions.html#beprecise
>>> >
>>> >
>>> > Thanks for your help.
>>> >
>>> > I just assumed /usr/local/lib was a standard place to look for
>>> libraries.
>>> >
>>> > Anyways, when I install OpenJPEG,  include goes in /usr/local/include
>>> and
>>> > lib goes in /usr/local/lib
>>> >
>>> > My configure command is:
>>> >
>>> >
>>> > $ ./configure --enable-libopenjpeg
>>> --extra-cflags="-I/usr/local/include"
>>> > --extra-ldflags="-L/usr/local/lib"
>>> >
>>> > and the results is
>>> >
>>> > ERROR: libopenjpeg not found
>>>
>>> There is config.log somewhere I guess?
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>>>
>>
>>
>