[Slackbuilds-users] ffmpeg4 not building

Luveh Keraph 1.41421 at gmail.com
Mon Apr 20 17:36:26 UTC 2020


It is building all right, in that it did not choke on opencv as I reported
here before. However, I could not get opencv-legacy to build with tesseract
already installed. I had to remove tesseract, build and install
opencv-legacy, build and install tesseract, and then launch the build of
ffmpeg4.  The build job for ffmpeg4 is still ongoing; I'll report on the
outcome.

On Mon, Apr 20, 2020 at 8:49 AM Jheengut Pritvi <z.coldplayer at gmail.com>
wrote:

> Hi,
> I have not tried the latest version but can you confirm if the legacy
> opencv is needed instead.
>
>
> On Sun, 19 Apr 2020 at 20:15, Luveh Keraph <1.41421 at gmail.com> wrote:
>
>> I am using the following ffmpeg4.sqf file in a freshly installed (and
>> up-to-date) 14.2 system:
>>
>> libass
>> chromaprint
>> frei0r
>> ladspa_sdk
>> libaom
>> libbluray
>> libbs2b
>> celt
>> libdc1394
>> libfdk-aac
>> flite
>> libgme
>> gsm
>> libiec61883
>> libavc1394
>> libilbc
>> libmodplug
>> lame
>> opencore-amr
>> opencv
>> opus
>> rtmpdump
>> rubberband
>> snappy
>> speex
>> tesseract
>> twolame
>> vid.stab
>> libwebp
>> x264
>> x265
>> xvidcore
>> zeromq
>> zvbi
>> ffmpeg4 | BINS=yes CHROMAPRINT=yes FREI0R=yes LADSPA=yes LIBAOM=yes
>> LIBBLURAY=yes LIBBS2B=yes LIBCELT=yes LIBDC1394=yes LIBFDK_AAC=yes
>> LIBFLITE=yes LIBGME=yes LIBGSM=yes LIBIEC61883=yes LIBILBC=yes
>> LIBMODPLUG=yes LIBMP3LAME=yes LIBOPENCORE=yes LIBOPENCV=yes LIBOPUS=yes
>> LIBRTMP=yes LIBRUBBERBAND=yes LIBSNAPPY=yes LIBSPEEX=yes LIBTESSERACT=yes
>> LIBTWOLAME=yes LIBVIDSTAB=yes LIBWEBP=yes LIBX264=yes LIBX265=yes
>> LIBXVID=yes LIBZMQ=yes LIBZVBI=yes
>>
>> I encountered the following issues:
>>
>> 1. var-plugin-sdk is required for rubberband.
>> 2. leptonica is required for tesseract (I think).
>> 3. ffmpeg4 seems to be looking for opencv, while the script above
>> installs opencv4:
>>
>> ffmpeg-4.1/tests/checkasm/jpeg2000dsp.c
>> ffmpeg-4.1/tests/checkasm/synth_filter.c
>> ffmpeg-4.1/tests/checkasm/vf_nlmeans.c
>> ffmpeg-4.1/tests/tiny_psnr.c
>> ffmpeg-4.1/COPYING.LGPLv2.1
>> ffmpeg-4.1/README.md
>> ffmpeg-4.1/CONTRIBUTING.md
>> ERROR: opencv not found using pkg-config
>>
>> # pkg-config --list-all|grep opencv
>> opencv4                             OpenCV - Open Source Computer Vision
>> Library
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