Update notes on FFmpeg version (#3480)

Summary:
The nightly builds support FFmpeg version 4, 5 and 6.

Pull Request resolved: https://github.com/pytorch/audio/pull/3480

Differential Revision: D47482841

Pulled By: mthrok

fbshipit-source-id: 88267f5e83ddc7b1e866b35e57a87b985e2c78c9

docs/source/build.ffmpeg.rst

@@ -25,7 +25,7 @@ To use NVENC/NVDEC with TorchAudio, the following items are required.
 
 TorchAudio’s official binary distributions are compiled to work with FFmpeg 4 libraries, and they contain the logic required for hardware-based decoding/encoding.
 
-In the following, we build FFmpeg 4 libraries with NVDEC/NVENC support. If you would like to use FFmpeg 5, then you need to build TorchAudio with it.
+In the following, we build FFmpeg 4 libraries with NVDEC/NVENC support. You can use FFmpeg 5 or 6 as well.
 
 The following procedure was tested on Ubuntu.
 

examples/tutorials/device_asr.py

@@ -10,12 +10,12 @@ on laptop.
 
 .. note::
 
-   This tutorial requires FFmpeg libraries (>=4.1, <4.4) and SentencePiece.
+   This tutorial requires FFmpeg libraries (>=4.1, <7) and SentencePiece.
 
    There are multiple ways to install FFmpeg libraries.
    If you are using Anaconda Python distribution,
-   ``conda install 'ffmpeg<4.4'`` will install
-   the required FFmpeg libraries.
+   ``conda install -c conda-forge 'ffmpeg<7'`` will install
+   compatible FFmpeg libraries.
 
    You can install SentencePiece by running ``pip install sentencepiece``.
 

examples/tutorials/effector_tutorial.py

@@ -13,12 +13,12 @@ apply various effects and codecs to waveform tensor.
 #
 # .. note::
 #
-#    This tutorial requires FFmpeg libraries (>=4.1, <5).
+#    This tutorial requires FFmpeg libraries (>=4.1, <7).
 #
 #    There are multiple ways to install FFmpeg libraries.
 #    If you are using Anaconda Python distribution,
-#    ``conda install -c anaconda 'ffmpeg<5'`` will install
-#    the required libraries.
+#    ``conda install -c conda-forge 'ffmpeg<7'`` will install
+#    compatible FFmpeg libraries.
 #
 
 ######################################################################

examples/tutorials/online_asr_tutorial.py

@@ -13,12 +13,12 @@ to perform online speech recognition.
 #
 # .. note::
 #
-#    This tutorial requires FFmpeg libraries (>=4.1, <4.4) and SentencePiece.
+#    This tutorial requires FFmpeg libraries (>=4.1, <7) and SentencePiece.
 #
 #    There are multiple ways to install FFmpeg libraries.
 #    If you are using Anaconda Python distribution,
-#    ``conda install 'ffmpeg<4.4'`` will install
-#    the required FFmpeg libraries.
+#    ``conda install -c conda-forge 'ffmpeg<7'`` will install
+#    compatible FFmpeg libraries.
 #
 #    You can install SentencePiece by running ``pip install sentencepiece``.
 

examples/tutorials/streamreader_basic_tutorial.py

@@ -14,12 +14,12 @@ libavfilter provides.
 #
 # .. note::
 #
-#    This tutorial requires FFmpeg libraries (>=4.1, <4.4).
+#    This tutorial requires FFmpeg libraries (>=4.1, <7).
 #
 #    There are multiple ways to install FFmpeg libraries.
 #    If you are using Anaconda Python distribution,
-#    ``conda install -c anaconda 'ffmpeg<4.4'`` will install
-#    the required libraries.
+#    ``conda install -c conda-forge 'ffmpeg<7'`` will install
+#    compatible FFmpeg libraries.
 #
 
 ######################################################################

examples/tutorials/streamwriter_advanced.py

@@ -23,16 +23,13 @@ play audio and video.
 #
 # .. note::
 #
-#    This tutorial requires torchaudio nightly build and FFmpeg libraries (>=4.1, <4.4).
-#
-#    To install torchaudio nightly build, please refer to
-#    https://pytorch.org/get-started/locally/ .
-#
+#    This tutorial requires FFmpeg libraries (>=4.1, <7).
 #
 #    There are multiple ways to install FFmpeg libraries.
 #    If you are using Anaconda Python distribution,
-#    ``conda install 'ffmpeg<4.4'`` will install the required FFmpeg libraries,
-#    however, this distribution does not have SDL plugin, so it cannot play
+#    ``conda install -c conda-forge 'ffmpeg<7'`` will install
+#    compatible FFmpeg libraries.
+#    However, this distribution does not have SDL plugin, so it cannot play
 #    video.
 #
 

examples/tutorials/streamwriter_basic_tutorial.py

@@ -13,14 +13,12 @@ encode and save audio/video data into various formats/destinations.
 #
 # .. note::
 #
-#    This tutorial requires torchaudio nightly build and FFmpeg libraries (>=4.1, <4.4).
-#
-#    To install torchaudio nightly build, please refer to
-#    https://pytorch.org/get-started/locally/ .
+#    This tutorial requires FFmpeg libraries (>=4.1, <7).
 #
 #    There are multiple ways to install FFmpeg libraries.
 #    If you are using Anaconda Python distribution,
-#    ``conda install 'ffmpeg<4.4'`` will install the required FFmpeg libraries.
+#    ``conda install -c conda-forge 'ffmpeg<7'`` will install
+#    compatible FFmpeg libraries.
 #
 
 ######################################################################