chore: update version to 8.0.0 and document changes

Author: bajankristof

CHANGELOG

@@ -1,3 +1,17 @@
+== 8.0.0 2025-06-27
+
+Improvements:
+* Added support for retries in the `FFMPEG::Transcoder` class. This allows for more robust command
+  argument composing and thus more stable outputs.
+
+Breaking Changes:
+* The `FFMPEG::Transcoder#process!` method will now fail if the expected output files do not exist after
+  successful processing. This behaviour can be controled by passing `checks: []` to the transcoder
+  initializer.
+* The `FFMPEG::Status::ExitError` class has been renamed to `FFMPEG::ExitError`.
+* The `FFMPEG::ExitError` class now holds a reference to the `StringIO` output of the FFmpeg command
+  (before it contained the `String` representation).
+
 == 7.1.4 2025-06-23
 
 Fixes:

README.md

@@ -106,7 +106,12 @@ transcoder = FFMPEG::Transcoder.new(
   # to optimize the transcoding process.
   presets: [preset],
   # The reporters are used to generate reports during the transcoding process.
-  reporters: [FFMPEG::Reporters::Progress, FFMPEG::Reporters::Silence]
+  reporters: [FFMPEG::Reporters::Progress, FFMPEG::Reporters::Silence],
+  # The checks are used to validate the output files after the transcoding process.
+  # They can be symbols, in which case they refer to methods on the `FFMPEG::Transcoder::Status` class,
+  # or objects that respond to `call` (such as lambdas or procs), in which case they will be called with
+  # the `FFMPEG::Transcoder::Status` object as an argument.
+  checks: %i[exist?]
 ) do
   # This block sets up the input arguments of the ffmpeg command.
   # It uses the same DSL to define the arguments as the preset does for the output arguments.
@@ -131,7 +136,7 @@ status = transcoder.process(media, '/path/to/output') do |report|
   end
 end
 
-status.success? # true (would be false if ffmpeg fails to transcode the media)
+status.success? # true (returns true if the exit status is zero and all checks passed)
 status.exitstatus # 0 (the exit status of the ffmpeg command)
 status.paths # ['/path/to/output.mp4'] (the paths of the output files)
 status.media # [FFMPEG::Media] (the media objects of the output files)

lib/ffmpeg/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module FFMPEG
-  VERSION = '7.1.4'
+  VERSION = '8.0.0'
 end