Failure To Build Regardless Whether --HEAD and/or --COMPACT Are USED about homebrew-ffmpeg

[scribblemaniac]

➜ brew install homebrew-ffmpeg/ffmpeg/ffmpeg $(brew options homebrew-ffmpeg/ffmpeg/ffmpeg --compact) --HEAD
...
Unknown option "--enable-libwavpack".

ffmpeg is dropping support for libwavpack, so remove the --with-wavpack flag.

➜ brew install homebrew-ffmpeg/ffmpeg/ffmpeg $(brew options homebrew-ffmpeg/ffmpeg/ffmpeg --compact)
..
ERROR: libbluray not found using pkg-config

Libbluray is not installed, or it's not in a place where ffmpeg can find it. This should be installed automatically as a dependency for the formula.

➜ brew install homebrew-ffmpeg/ffmpeg/ffmpeg --HEAD
...
ERROR: fontconfig not found using pkg-config

Again you are missing a dependency, this time fontconfig.

To fix the last two issues, try running the same command but with --dependencies-only added first, and make sure everything installs successfully, then run the command as you have it now. Other things to try: check brew doctor or brew reinstall any dependencies which are causing the install to fail.

[Rogue-Git-Dev]

I knew not WAVPack support was to be removed. It is included in all options which made me believe otherwise. How can I instal using all options precluding WAVPack? WAVPack is installed. If I remove it, will that be the solution?

Both libbluray and fontconfig are installed; that has not changed. PKG-Config has no non-standard prefixes in my path or any modifications to its configuration. These PKG-Config related error messages arose since I upgraded my machine to Big Sur although that may not be the culprit.

[scribblemaniac]

Wavpack is in all options because it is supported by the latest stable build of ffmpeg. It's not reasonable to support the unstable head since it changes so often. You can run brew options homebrew-ffmpeg/ffmpeg/ffmpeg --compact remove the flag you don't want, and copy it into you command, replacing $(brew options homebrew-ffmpeg/ffmpeg/ffmpeg --compact).

[Rogue-Git-Dev]

Apologies but I fail to understand what you mean by replacing part of that command with remove and whichever dependency. I may need an example.

Do you recommend not to use HEAD builds of any dependency for FFMPEG, every dependency for FFMPEG, or only certain dependencies? If the latter, which ones?

[scribblemaniac]

brew install homebrew-ffmpeg/ffmpeg/ffmpeg --with-chromaprint --with-decklink --with-fdk-aac --with-game-music-emu --with-libbluray --with-libbs2b --with-libcaca --with-libgsm --with-libmodplug --with-librsvg --with-libsoxr --with-libssh --with-libvidstab --with-libvmaf --with-libxml2 --with-opencore-amr --with-openh264 --with-openjpeg --with-openssl [email protected] --with-rav1e --with-rtmpdump --with-rubberband --with-speex --with-srt --with-tesseract --with-two-lame --with-webp --with-xvid --with-zeromq --with-zimg --HEAD

I would not recommend you install anything with HEAD unless you have a good reason to (for example some feature you want or fix for an issue you are having that is not in the latest stable version).

[Rogue-Git-Dev]

Now I understand: replace the command with the individual flags of each of the dependencies. I tried to avoid that so thanks for making that easy to copy and paste. Is it feasible to implement a --without-[dependency] flag, or is this out of the scope of FFMPEG or any formula in general?

[Rogue-Git-Dev]

The same libbluray related error arose when using the exact line you wrote. Why do you think PKG-Config all of a sudden cannot find libbluray? I uninstalled PKG-Config, reinstalled PKG-Config, uninstalled libbluray, and reinstalled libbluray all to no avail. I will not be surprised if fontconfig is the next one to cause problems. Both of these are linked via Homebrew so that is not the problem.

[Rogue-Git-Dev]

I never will understand why, but today the build was successful. No errors occurred; however, I changed nothing since I opened this issue. PKG-Config decided to find libbluray and fontconfig.

[retokromer]

On my end, it works fine on macOS 11.0.1, but I’ll not try to reproduce on 11.1 beta 2 now (because I rarely have the time to run after beta releases ;-)

[retokromer]

I never will understand why, but today the build was successful. No errors occurred; however, I changed nothing since I opened this issue. PKG-Config decided to find libbluray and fontconfig.

The HEAD is evolving constantly…

In my opinion, it’s simpler to use releases for actual work, unless you need a feature that is not yet in a the last release, but only on the development branch.

Is it feasible to implement a --without-[dependency] flag, or is this out of the scope of FFMPEG or any formula in general?

That should be possible, yet what’s the benefit?

The current formula can already be parameterized according to any needs. Your approach would include the new libraries and you would have to exclude them each time a new one is added, if not needed.

[Rogue-Git-Dev]

The benefit of the --without-[dependency] argument would be avoiding to type all of the flags. One could type the same command for --COMPACT and append --without-[dependency] to avoid removing --compact and using the individual flags.

[slhck]

Please note that not everyone wants to always install all the options.

In particular, some options in this tap are only meaningful if you have other third-party SDKs installed (e.g., the DeckLink SDK) – or they are only useful for a very small number of people (e.g., snappy).

This is why we provide some defaults like libx264 but not others.

[Rogue-Git-Dev]

Of course; that is understandable. I am considering the edge case wherein a dependency [stable or HEAD] fails to be recognised although it is installed. PKG-Config has no HEAD but it failed to recognise both libbluray and fontconfig on my machine although both were stable builds installed at those junctures. This would be a quick way to instal all dependencies without certain ones provided the edge case exists and not type all of the individual dependency flags. My suggestion is for convenience really and not of particular importance.

[slhck]

Sure. Unfortunately we cannot provide both modes of operation. Either we have some default formulae that are sensible and additional ones with --with-XXX, or we have all dependencies by default and a --without mechanism. If both should exist at the same time, Homebrew itself would have to provide such a mechanism.

[Rogue-Git-Dev]

I knew that not. Thanks for the explanation.

[slhck]

By the way, at least for me, the "not found using pkg-config" errors from ffmpeg are often red herrings. I frequently get those printed at the end of a configuration/compilation process when it errors out, but the actual error is often logged much earlier and to be found in the ffmpeg compilation log itself. It should be in some temporary folder that Homebrew creates.

Anyway, good that it worked for you now.

[Rogue-Git-Dev]

Do you know where this log resides on Mac OS? Perhaps I can retrieve it before it is deleted provided this occurs in future.

[retokromer]

Do you know where this log resides on Mac OS? Perhaps I can retrieve it before it is deleted provided this occurs in future.

At ~/Library/Logs/Homebrew/ if I remember carefully.