[Slackbuilds-users] ffmpeg4 not building

[Jheengut Pritvi]

Hi Luveh,

I checked ffmpeg, ffmpeg3 builds with opencv-legacy.
The readme of ffmpeg4 does not mention this detail BTW.

The ffmpeg4 of slackware64-current builds without the need of openvc
though.

On Mon, 20 Apr 2020 at 22:13, Luveh Keraph <1.41421 at gmail.com> wrote:

> With the provisos mentioned in my previous communication, I was able to
> build ffmpeg4.
>
> On Mon, Apr 20, 2020 at 11:36 AM Luveh Keraph <1.41421 at gmail.com> wrote:
>
>> 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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