Do not mix conda-forge, defaults and nvidia conda channels in linux_cuda_wheel job

Author: traversaro

.github/workflows/linux_cuda_wheel.yaml

@@ -70,8 +70,7 @@ jobs:
         # We test against 12.6 and 13.0 to avoid having too big of a CI matrix,
         # but for releases we should add 12.8.
         cuda-version: ['12.6', '13.0']
-        # TODO: put back ffmpeg 5 https://github.com/pytorch/torchcodec/issues/325
-        ffmpeg-version-for-tests: ['4.4.2', '6', '7', '8.0']
+        ffmpeg-version-for-tests: ['4.4.2', '5', '6', '7', '8.0']
 
     container:
       image: "pytorch/manylinux2_28-builder:cuda${{ matrix.cuda-version }}"
@@ -89,12 +88,17 @@ jobs:
           name: meta-pytorch_torchcodec__${{ matrix.python-version }}_cu${{ env.cuda_version_without_periods }}_x86_64
           path: pytorch/torchcodec/dist/
       - name: Setup miniconda using test-infra
-        uses: pytorch/test-infra/.github/actions/setup-miniconda@main
+        uses: conda-incubator/setup-miniconda@v3
         with:
+          # Using miniforge instead of miniconda ensures that the default
+          # conda channel is conda-forge instead of main/default. This ensures
+          # ABI consistency between dependencies:
+          # https://conda-forge.org/docs/user/transitioning_from_defaults/
+          miniforge-version: latest
           python-version: ${{ matrix.python-version }}
           # We install conda packages at the start because otherwise conda may have conflicts with dependencies.
           # Note: xorg-libxau was addded to fix a problem with ffmpeg 4. We should consider removing it.
-          default-packages: "nvidia/label/cuda-${{ matrix.cuda-version }}.0::libnpp nvidia::cuda-nvrtc=${{ matrix.cuda-version }} nvidia::cuda-toolkit=${{ matrix.cuda-version }} nvidia::cuda-cudart=${{ matrix.cuda-version }} nvidia::cuda-driver-dev=${{ matrix.cuda-version }} conda-forge::ffmpeg=${{ matrix.ffmpeg-version-for-tests }} conda-forge::xorg-libxau"
+          default-packages: "libnpp cuda-nvrtc=${{ matrix.cuda-version }} cuda-toolkit=${{ matrix.cuda-version }} cuda-cudart=${{ matrix.cuda-version }} cuda-driver-dev=${{ matrix.cuda-version }} ffmpeg=${{ matrix.ffmpeg-version-for-tests }} xorg-libxau"
       - name: Check env
         run: |
           ${CONDA_RUN} env