由VLC音量超100%导致蓝牙播放器炸音的现象而获得的一些发现 ffmpeg

1.情况描述在M1芯片的macOS 12.3.1的系统上安装了最新的VLC视频播放器，并将音量调至200%，此时播放低频且富有变化的音乐，JBL蓝牙播放器会出现咔次的炸音且细节全糊，本来流动的声音一卡一卡的，很刺耳。
2. 修复把VLC设定的音量调至100%及以下即可。
3. 分析由于我之前看另一部电影把声音调至了200%且没有出现任何问题，我想知道问题出在哪里。
猜测是vlc的音量突破100%时的算法会做相当于修改音轨内容的操作，导致解析失败，而放出杂音。
首先，这个电影文件用ffprobe可以看到

$ ffprobe Dune.2021.UHD.BluRay.2160p.x265.10bit.DoVi.2Audio.mUHD-FRDS.mkv ffprobe version 4.4 Copyright (c) 2007-2021 the FFmpeg developers built with Apple clang version 12.0.5 (clang-1205.0.22.9) configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/4.4_2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-avresample --enable-videotoolbox libavutil56. 70.100 / 56. 70.100 libavcodec58.134.100 / 58.134.100 libavformat58. 76.100 / 58. 76.100 libavdevice58. 13.100 / 58. 13.100 libavfilter7.110.100 /7.110.100 libavresample4.0.0 /4.0.0 libswscale5.9.100 /5.9.100 libswresample3.9.100 /3.9.100 libpostproc55.9.100 / 55.9.100 [matroska,webm @ 0x13b019600] Could not find codec parameters for stream 5 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options [matroska,webm @ 0x13b019600] Could not find codec parameters for stream 6 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options [matroska,webm @ 0x13b019600] Could not find codec parameters for stream 7 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options Input #0, matroska,webm, from 'Dune.2021.UHD.BluRay.2160p.x265.10bit.DoVi.2Audio.mUHD-FRDS.mkv': Metadata: encoder: libebml v1.4.2 + libmatroska v1.6.4 creation_time: 2021-12-25T09:11:56.000000Z Duration: 02:35:26.64, start: 0.000000, bitrate: 22814 kb/s Chapters: Chapter #0:0: start 0.000000, end 196.154289 Metadata: title: 第 01 章 Chapter #0:1: start 196.154289, end 774.815689 Metadata: title: 第 02 章 Chapter #0:2: start 774.815689, end 1320.736067 Metadata: title: 第 03 章 Chapter #0:3: start 1320.736067, end 1756.921822 Metadata: title: 第 04 章 Chapter #0:4: start 1756.921822, end 2350.931911 Metadata: title: 第 05 章 Chapter #0:5: start 2350.931911, end 2839.795289 Metadata: title: 第 06 章 Chapter #0:6: start 2839.795289, end 3413.493400 Metadata: title: 第 07 章 Chapter #0:7: start 3413.493400, end 4010.381356 Metadata: title: 第 08 章 Chapter #0:8: start 4010.381356, end 4604.891956 Metadata: title: 第 09 章 Chapter #0:9: start 4604.891956, end 5160.655489 Metadata: title: 第 10 章 Chapter #0:10: start 5160.655489, end 5760.379622 Metadata: title: 第 11 章 Chapter #0:11: start 5760.379622, end 6309.469822 Metadata: title: 第 12 章 Chapter #0:12: start 6309.469822, end 6830.323489 Metadata: title: 第 13 章 Chapter #0:13: start 6830.323489, end 7418.536111 Metadata: title: 第 14 章 Chapter #0:14: start 7418.536111, end 7933.342067 Metadata: title: 第 15 章 Chapter #0:15: start 7933.342067, end 8445.770667 Metadata: title: 第 16 章 Chapter #0:16: start 8445.770667, end 8847.797289 Metadata: title: 第 17 章 Chapter #0:17: start 8847.797289, end 9326.635000 Metadata: title: 第 18 章 Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x1604, SAR 1:1 DAR 960:401, 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default) Metadata: BPS: 14748974 DURATION: 02:35:26.609000000 NUMBER_OF_FRAMES: 223615 NUMBER_OF_BYTES : 17194739399 _STATISTICS_WRITING_APP: mkvmerge v62.0.0 ('Apollo') 64-bit _STATISTICS_WRITING_DATE_UTC: 2021-12-25 09:11:56 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:1(eng): Audio: truehd, 48000 Hz, 7.1, s32 (24 bit) (default) Metadata: title: 原声 BPS: 3242671 DURATION: 02:35:26.610000000 NUMBER_OF_FRAMES: 11191931 NUMBER_OF_BYTES : 3780391034 _STATISTICS_WRITING_APP: mkvmerge v62.0.0 ('Apollo') 64-bit _STATISTICS_WRITING_DATE_UTC: 2021-12-25 09:11:56 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:2(chi): Audio: dts (DTS-HD MA), 48000 Hz, 7.1, s32p (24 bit) (default) Metadata: title: 上译国语 BPS: 4702403 DURATION: 02:35:26.635000000 NUMBER_OF_FRAMES: 874372 NUMBER_OF_BYTES : 5482200184 _STATISTICS_WRITING_APP: mkvmerge v62.0.0 ('Apollo') 64-bit _STATISTICS_WRITING_DATE_UTC: 2021-12-25 09:11:56 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:3(chi): Subtitle: hdmv_pgs_subtitle, 1920x1080 (default) Metadata: title: 国配特效 BPS: 13781 DURATION: 02:35:25.483000000 NUMBER_OF_FRAMES: 3269 NUMBER_OF_BYTES : 16064721 SOURCE_ID: 0012ab _STATISTICS_WRITING_APP: mkvmerge v62.0.0 ('Apollo') 64-bit _STATISTICS_WRITING_DATE_UTC: 2021-12-25 09:11:56 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID Stream #0:4(chi): Subtitle: hdmv_pgs_subtitle, 1920x1080 Metadata: title: 双语特效 BPS: 20918 DURATION: 02:35:25.483000000 NUMBER_OF_FRAMES: 3203 NUMBER_OF_BYTES : 24384886 SOURCE_ID: 0012a9 _STATISTICS_WRITING_APP: mkvmerge v62.0.0 ('Apollo') 64-bit _STATISTICS_WRITING_DATE_UTC: 2021-12-25 09:11:56 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID Stream #0:5(chi): Subtitle: hdmv_pgs_subtitle Metadata: title: 简中 BPS: 20158 DURATION: 02:28:42.914000000 NUMBER_OF_FRAMES: 2514 NUMBER_OF_BYTES : 22484517 _STATISTICS_WRITING_APP: mkvmerge v62.0.0 ('Apollo') 64-bit _STATISTICS_WRITING_DATE_UTC: 2021-12-25 09:11:56 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:6(chi): Subtitle: hdmv_pgs_subtitle Metadata: title: 繁中 BPS: 19753 DURATION: 02:35:12.929000000 NUMBER_OF_FRAMES: 2360 NUMBER_OF_BYTES : 22995600 SOURCE_ID: 0012a5 _STATISTICS_WRITING_APP: mkvmerge v62.0.0 ('Apollo') 64-bit _STATISTICS_WRITING_DATE_UTC: 2021-12-25 09:11:56 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID Stream #0:7(chi): Subtitle: hdmv_pgs_subtitle Metadata: title: 繁中 BPS: 18295 DURATION: 02:35:12.929000000 NUMBER_OF_FRAMES: 2514 NUMBER_OF_BYTES : 21297928 SOURCE_ID: 0012a6 _STATISTICS_WRITING_APP: mkvmerge v62.0.0 ('Apollo') 64-bit _STATISTICS_WRITING_DATE_UTC: 2021-12-25 09:11:56 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID

其中，视频

Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x1604, SAR 1:1 DAR 960:401, 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default)

， 4k 24fps，且码率是14748974，大概是1.76MB/s。
音轨有两个，英语的是杜比全景声，上译国语的是DTS-HD，码率分别达到了0.39MB/s和0.56MB/s。
感叹一下，这个码率几乎相当于按上面的4k降到1080P（1920*1080，接近1/4）的码率了，如果是一首3分钟的音乐，按0.39MB/s，就有70MB了。
【由VLC音量超100%导致蓝牙播放器炸音的现象而获得的一些发现】之前看的是

$ ffprobe Malena\ 2000\ 1080p\ BluRay\ DD+5.1\ x264-Geek.mkv ffprobe version 4.4 Copyright (c) 2007-2021 the FFmpeg developers built with Apple clang version 12.0.5 (clang-1205.0.22.9) configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/4.4_2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-avresample --enable-videotoolbox libavutil56. 70.100 / 56. 70.100 libavcodec58.134.100 / 58.134.100 libavformat58. 76.100 / 58. 76.100 libavdevice58. 13.100 / 58. 13.100 libavfilter7.110.100 /7.110.100 libavresample4.0.0 /4.0.0 libswscale5.9.100 /5.9.100 libswresample3.9.100 /3.9.100 libpostproc55.9.100 / 55.9.100 Input #0, matroska,webm, from 'Malena 2000 1080p BluRay DD+5.1 x264-Geek.mkv': Metadata: title: Malèna [2000] by Giuseppe Tornatore / Uncut / KOR BD encoder: libebml v1.4.0 + libmatroska v1.6.2 creation_time: 2021-10-08T11:56:47.000000Z Duration: 01:48:05.02, start: 0.000000, bitrate: 18216 kb/s Chapters: Chapter #0:0: start 0.000000, end 245.787000 Metadata: title: Opening Credits Chapter #0:1: start 245.787000, end 345.720000 Metadata: title: Shut Up And Watch! Chapter #0:2: start 345.720000, end 434.976000 Metadata: title: Latin Teacher's Daughter Chapter #0:3: start 434.976000, end 548.423000 Metadata: title: Measuring Up Chapter #0:4: start 548.423000, end 744.827000 Metadata: title: Long Pants And A Promise Chapter #0:5: start 744.827000, end 936.227000 Metadata: title: Her Husband Gone Off To War Chapter #0:6: start 936.227000, end 1132.298000 Metadata: title: Ma L'Amore No Chapter #0:7: start 1132.298000, end 1295.503000 Metadata: title: Imaging It Chapter #0:8: start 1295.503000, end 1583.123000 Metadata: title: A Stroll Through The Streets Chapter #0:9: start 1583.123000, end 1644.476000 Metadata: title: Great Jealousy Chapter #0:10: start 1644.476000, end 1885.634000 Metadata: title: A Beautiful, Silent Outsider Chapter #0:11: start 1885.634000, end 2157.906000 Metadata: title: Mourning With Malena Chapter #0:12: start 2157.906000, end 2303.092000 Metadata: title: Malena's Protector Chapter #0:13: start 2303.092000, end 2476.933000 Metadata: title: Stealing Malena's Underwear Chapter #0:14: start 2476.933000, end 2520.768000 Metadata: title: A Very Long Night Chapter #0:15: start 2520.768000, end 2714.962000 Metadata: title: Prisoner Of The House Chapter #0:16: start 2714.962000, end 2804.343000 Metadata: title: You're Dishonored Chapter #0:17: start 2804.343000, end 2944.150000 Metadata: title: Lieutenant And Dentist Chapter #0:18: start 2944.150000, end 3131.628000 Metadata: title: Dishonor For Malena Chapter #0:19: start 3131.628000, end 3582.412000 Metadata: title: Ill Fated, Alone And Beautiful Chapter #0:20: start 3582.412000, end 3818.523000 Metadata: title: Don't Marry Him Chapter #0:21: start 3818.523000, end 4008.838000 Metadata: title: Lawyer's Restribution Chapter #0:22: start 4008.838000, end 4174.712000 Metadata: title: Aerial Assault Chapter #0:23: start 4174.712000, end 4452.281000 Metadata: title: In The Lord's Hands Chapter #0:24: start 4452.281000, end 4621.534000 Metadata: title: A New Malena Chapter #0:25: start 4621.534000, end 4752.289000 Metadata: title: Possessed By The Devil Chapter #0:26: start 4752.289000, end 5026.271000 Metadata: title: It's My First Time Chapter #0:27: start 5026.271000, end 5319.940000 Metadata: title: A Wicked End Chapter #0:28: start 5319.940000, end 5905.817000 Metadata: title: Nine Scordia's Return Chapter #0:29: start 5905.817000, end 6485.024000 Metadata: title: Regaining One's Dignity / End Credits Stream #0:0(ita): Video: h264 (High), yuv420p(tv, bt709/bt709/unknown, progressive), 1920x818, SAR 1:1 DAR 960:409, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default) Metadata: title: Geek @ MTeam BPS-eng: 17191376 DURATION-eng: 01:48:04.979000000 NUMBER_OF_FRAMES-eng: 155484 NUMBER_OF_BYTES-eng: 13935714442 _STATISTICS_WRITING_APP-eng: mkvmerge v51.0.0 ('I Wish') 64-bit _STATISTICS_WRITING_DATE_UTC-eng: 2021-10-08 11:56:47 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:1(ita): Audio: eac3, 48000 Hz, 5.1(side), fltp, 1023 kb/s (default) Metadata: title: Italian / Dolby Digital Plus / 5.1 / 1023 kbps BPS-eng: 1023000 DURATION-eng: 01:48:05.024000000 NUMBER_OF_FRAMES-eng: 607971 NUMBER_OF_BYTES-eng: 829272444 _STATISTICS_WRITING_APP-eng: mkvmerge v51.0.0 ('I Wish') 64-bit _STATISTICS_WRITING_DATE_UTC-eng: 2021-10-08 11:56:47 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:2(eng): Subtitle: subrip (default) Metadata: title: English / R2DVD / Medusa / srt BPS-eng: 31 DURATION-eng: 01:43:36.366000000 NUMBER_OF_FRAMES-eng: 668 NUMBER_OF_BYTES-eng: 24327 _STATISTICS_WRITING_APP-eng: mkvmerge v51.0.0 ('I Wish') 64-bit _STATISTICS_WRITING_DATE_UTC-eng: 2021-10-08 11:56:47 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:3(chi): Subtitle: subrip Metadata: title: Simplified / Custom / CnSCG / srt BPS-eng: 27 DURATION-eng: 01:47:58.000000000 NUMBER_OF_FRAMES-eng: 703 NUMBER_OF_BYTES-eng: 22433 _STATISTICS_WRITING_APP-eng: mkvmerge v51.0.0 ('I Wish') 64-bit _STATISTICS_WRITING_DATE_UTC-eng: 2021-10-08 11:56:47 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES Stream #0:4(chi): Subtitle: subrip Metadata: title: Traditional / Custom / CnSCG / srt BPS-eng: 27 DURATION-eng: 01:47:58.000000000 NUMBER_OF_FRAMES-eng: 703 NUMBER_OF_BYTES-eng: 22433 _STATISTICS_WRITING_APP-eng: mkvmerge v51.0.0 ('I Wish') 64-bit _STATISTICS_WRITING_DATE_UTC-eng: 2021-10-08 11:56:47 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES

可以看到这里h264的1080P的视频码率（17191376）比前一个h265的4k的视频码率（14748974）还大。。。
查到一部1080P H265压缩的是9510 kbps,压缩了接近45%。。。