Upgrade ffmpeg to 8 by default (#23393)

* Upgrade to ffmpeg 8

* Remove workaround

* Cleanup ffmpeg version resolution

* Include older 7.0 for testing purposes

* include

frigate/ffmpeg_presets.py

@@ -465,16 +465,6 @@ PRESETS_RECORD_OUTPUT = {
         "-c:a",
         "aac",
     ],
-    # NOTE: This preset originally used "-c:a copy" to pass through audio
-    # without re-encoding. FFmpeg 7.x introduced a threaded pipeline where
-    # demuxing, encoding, and muxing run in parallel via a Scheduler. This
-    # broke audio streamcopy from RTSP sources: packets are demuxed correctly
-    # but silently dropped before reaching the muxer (0 bytes written). The
-    # issue is specific to RTSP + streamcopy; file inputs and transcoding both
-    # work. Transcoding AAC audio is very lightweight (~30KiB per 10s segment)
-    # and adds negligible CPU overhead, so this is an acceptable workaround.
-    # The benefits of FFmpeg 7.x — particularly the removal of gamma correction
-    # hacks required by earlier versions — outweigh this trade-off.
     "preset-record-generic-audio-copy": [
         "-f",
         "segment",
@@ -486,10 +476,8 @@ PRESETS_RECORD_OUTPUT = {
         "1",
         "-strftime",
         "1",
-        "-c:v",
+        "-c",
         "copy",
-        "-c:a",
-        "aac",
     ],
     "preset-record-mjpeg": [
         "-f",