[24.05] Build failure: ffmpeg_7-full

[Eveeifyeve]

Steps To Reproduce

Steps to reproduce the behavior:

1. build ffmpeg_7-full on aarch64-darwin.

Build log

CC      tests/checkasm/v210dec.o
1 warning generated.
CC      tests/checkasm/v210enc.o
CC      tests/checkasm/vc1dsp.o
CC      tests/checkasm/vf_blend.o
CC      tests/checkasm/vf_bwdif.o
CC      tests/checkasm/vf_colorspace.o
CC      tests/checkasm/vf_convolution.o
CC      tests/checkasm/vf_eq.o
18 warnings generated.
CC      tests/checkasm/vf_gblur.o
CC      tests/checkasm/vf_hflip.o
CC      tests/checkasm/vf_nlmeans.o
CC      tests/checkasm/vf_threshold.o
CC      tests/checkasm/videodsp.o
CC      tests/checkasm/vorbisdsp.o
CC      tests/checkasm/vp8dsp.o
CC      tests/checkasm/vp9dsp.o
CC      tests/checkasm/vvc_mc.o
AR      libavdevice/libavdevice.a
AR      libpostproc/libpostproc.a
CC      tests/api/api-threadmessage-test.o
CC      tests/api/api-flac-test.o
CC      tests/api/api-seek-test.o
HOSTCC  tests/audiogen.o
HOSTCC  tests/videogen.o
COPY    tests/data/filtergraphs/anequalizer
COPY    tests/data/filtergraphs/firequalizer
COPY    tests/data/filtergraphs/compand
COPY    tests/data/filtergraphs/channelmap_one_int
GEN     tests/data/hls-list.m3u8
GEN     tests/data/hls-list-append.m3u8
COPY    tests/data/filtergraphs/channelmap_one_str
COPY    tests/data/filtergraphs/overlay
COPY    tests/data/filtergraphs/overlay_rgb
make: *** [tests/fate/filter-audio.mak:209: tests/data/hls-list.m3u8] Error 134
make: *** Waiting for unfinished jobs....
make: *** [tests/fate/filter-audio.mak:219: tests/data/hls-list-append.m3u8] Error 134

Additional context

This is an issue something to with ffmpeg internals with nix on aarch64-darwin.

Notify maintainers

@Atemu, @arthsmn @jopejoe1

Metadata

warning: ignoring untrusted substituter 'https://nix-community.cachix.org', you are not a trusted user.
Run `man nix.conf` for more information on the `substituters` configuration option.
 - system: `"aarch64-darwin"`
 - host os: `Darwin 24.0.0, macOS 15.0`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.23.3`
 - channels(root): `"nixpkgs"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixpkgs`

---

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[jopejoe1]

This was fixed on unstable by the following prs #322724 #328424 #329380 #328420, but this was not backported to 24.05.

[Eveeifyeve]

I have updated my channel trying to build the package again.

[Eveeifyeve]

But I am on unstable anyways so this shouldn't be a problem.

[Eveeifyeve]

I just had to update my channel and that seemed to fix the issue.
For flake update using nix flake update and non-flakes use nix-channel --update.

[Atemu]

I also just checked nixos-24.05 just to be sure and ffmpeg_7-full builds just fine.

[jopejoe1]

I also just checked nixos-24.05 just to be sure and ffmpeg_7-full builds just fine.

Strange i was checking hydra and the build for ffmpeg_7-full on darwin-24.05 was failing.

https://hydra.nixos.org/job/nixpkgs/nixpkgs-24.05-darwin/ffmpeg_7-full.aarch64-darwin

[Atemu]

Ohhh, darwin. Right.

Not sure whether we want to bother backporting that. I don't think it's worth it personally.

[Eveeifyeve]

Ohhh, darwin. Right.

Not sure whether we want to bother backporting that. I don't think it's worth it personally.

It's failing at make: *** [tests/fate/filter-audio.mak:209: tests/data/hls-list.m3u8] Error 134 for aarch64-darwin.

x86_64 stripped errors:

libavdevice/avfoundation.m:765:41: error: must use 'enum' tag to refer to type 'AVMediaType'
static NSArray* getDevicesWithMediaType(AVMediaType mediaType) {
                                        ^
                                        enum 
libavdevice/avfoundation.m:816:50: error: incompatible integer to pointer conversion sending 'enum AVMediaType' to parameter of type 'NSString *' [-Wint-conversion]
    return [AVCaptureDevice devicesWithMediaType:mediaType];
                                                 ^~~~~~~~~
libavdevice/avfoundation.m:829:54: error: incompatible pointer to integer conversion passing 'NSString *const' to parameter of type 'enum AVMediaType' [-Wint-conversion]
    NSArray *devices       = getDevicesWithMediaType(AVMediaTypeVideo);
                                                     ^~~~~~~~~~~~~~~~
libavdevice/avfoundation.m:830:54: error: incompatible pointer to integer conversion passing 'NSString *const' to parameter of type 'enum AVMediaType' [-Wint-conversion]
    NSArray *devices_muxed = getDevicesWithMediaType(AVMediaTypeMuxed);
                                                     ^~~~~~~~~~~~~~~~
libavdevice/avfoundation.m:865:43: error: incompatible pointer to integer conversion passing 'NSString *const' to parameter of type 'enum AVMediaType' [-Wint-conversion]
        devices = getDevicesWithMediaType(AVMediaTypeAudio);
                                          ^~~~~~~~~~~~~~~~
libavdevice/avfoundation.m:989:52: error: incompatible pointer to integer conversion passing 'NSString *const' to parameter of type 'enum AVMediaType' [-Wint-conversion]
        NSArray *devices = getDevicesWithMediaType(AVMediaTypeAudio);
                                                   ^~~~~~~~~~~~~~~~
libavdevice/avfoundation.m:1002:52: error: incompatible pointer to integer conversion passing 'NSString *const' to parameter of type 'enum AVMediaType' [-Wint-conversion]
        NSArray *devices = getDevicesWithMediaType(AVMediaTypeAudio);
                                                   ^~~~~~~~~~~~~~~~

make: *** [ffbuild/common.mak:87: libavdevice/avfoundation.o] Error 1

Hydra Links:

• All Darwin Builds: https://hydra.nixos.org/eval/1808445?filter=ffmpeg&compare=1808430&full=

hope that helps @Atemu.

[Atemu]

We know the cause (it's already fixed on unstable), we're just deliberating whether we should bother to backport because it was broken on 24.05 from the beginning.

Given @jopejoe1 appears to have the same opinion as me, I don't think we will.