我的音乐库是 FLAC 未压缩的，当使用 FFmpeg -ss 选项时，至少有一个文件出现问题。
如果我将其转换为 FLAC 级别 0，它可以正常工作。
当使用 FFmpeg -ss 对文件 FLAC Uncompressed 进行处理时：
ffmpeg -ss 15 -i "02 - Sad But True.uncompressedNotWorking.flac" out.flac 2> log.txt
错误：
[flac @ 000001ed6f1e4a00] blocksize 16384 > 4608
[flac @ 000001ed6f1e4a00] decode_frame() failed
Error while decoding stream *0:0: Invalid data found when processing input
ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20181017
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable- fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
Input *0, flac, from '02 - Sad But True.uncompressedNotWorking.flac':
Metadata:
ALBUM : Metallica (Studio Master 24bit/96kHz)
album_artist : Metallica
ARTIST : Metallica
GENRE : Pop/Rock
HDTRACKS : www.hdtracks.com
TITLE : Sad But True
DATE : 1991
track : 02
TRACKTOTAL : 12
Duration: 00:05:24.71, start: 0.000000, bitrate: 4610 kb/s
Stream *0:0: Audio: flac, 96000 Hz, stereo, s32 (24 bit)
Stream *0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 500x500 [SAR 600:600 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Metadata:
comment : Cover (front)
Stream mapping:
Stream *0:1 -> *0:0 (mjpeg (native) -> png (native))
Stream *0:0 -> *0:1 (flac (native) -> flac (native))
Press [q] to stop, [?] for help
[swscaler @ 000001ed6f252000] deprecated pixel format used, make sure you did set range correctly
[flac @ 000001ed6f192000] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
[flac @ 000001ed6f1e4a00] blocksize 16384 > 4608
[flac @ 000001ed6f1e4a00] decode_frame() failed
Error while decoding stream *0:0: Invalid data found when processing input
Output *0, flac, to 'out.flac':
Metadata:
ALBUM : Metallica (Studio Master 24bit/96kHz)
album_artist : Metallica
ARTIST : Metallica
GENRE : Pop/Rock
HDTRACKS : www.hdtracks.com
TITLE : Sad But True
DATE : 1991
track : 02
TRACKTOTAL : 12
encoder : Lavf58.20.100
Stream *0:0: Video: png, rgb24, 500x500 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
Metadata:
comment : Cover (front)
encoder : Lavc58.35.100 png
Stream *0:1: Audio: flac, 49920 Hz, mono, s32 (24 bit), 128 kb/s
Metadata:
encoder : Lavc58.35.100 flac
[flac @ 000001ed6f192000] No packets were sent for some of the attached pictures.
frame= 0 fps=0.0 q=0.0 Lsize= 8kB time=00:00:00.00 bitrate=N/A speed= 0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
当使用 FFmpeg 处理该文件 FLAC Level 0 时：
ffmpeg -ss 15 -i "02 - Sad But True.level0Working.flac" out.flac 2> log.txt
没有错误。
ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20181017
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
Input *0, flac, from '02 - Sad But True.level0Working.flac':
Metadata:
ALBUM : Metallica (Studio Master 24bit/96kHz)
album_artist : Metallica
ARTIST : Metallica
GENRE : Pop/Rock
HDTRACKS : www.hdtracks.com
TITLE : Sad But True
DATE : 1991
track : 02
TRACKTOTAL : 12
Duration: 00:05:24.71, start: 0.000000, bitrate: 3434 kb/s
Stream *0:0: Audio: flac, 96000 Hz, stereo, s32 (24 bit)
Stream *0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 500x500 [SAR 600:600 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Metadata:
comment : Cover (front)
Stream mapping:
Stream *0:1 -> *0:0 (mjpeg (native) -> png (native))
Stream *0:0 -> *0:1 (flac (native) -> flac (native))
Press [q] to stop, [?] for help
[swscaler @ 000001c1f86c3600] deprecated pixel format used, make sure you did set range correctly
[flac @ 000001c1f7b21fc0] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output *0, flac, to 'out.flac':
Metadata:
ALBUM : Metallica (Studio Master 24bit/96kHz)
album_artist : Metallica
ARTIST : Metallica
GENRE : Pop/Rock
HDTRACKS : www.hdtracks.com
TITLE : Sad But True
DATE : 1991
track : 02
TRACKTOTAL : 12
encoder : Lavf58.20.100
Stream *0:0: Video: png, rgb24, 500x500 [SAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k fps, 90k tbn, 90k tbc
Metadata:
comment : Cover (front)
encoder : Lavc58.35.100 png
Stream *0:1: Audio: flac, 96000 Hz, stereo, s32 (24 bit), 128 kb/s
Metadata:
encoder : Lavc58.35.100 flac
frame= 0 fps=0.0 q=0.0 size= 0kB time=00:01:22.00 bitrate= 0.0kbits/s speed= 164x
frame= 0 fps=0.0 q=0.0 size= 0kB time=00:02:49.21 bitrate= 0.0kbits/s speed= 169x
frame= 0 fps=0.0 q=0.0 size= 0kB time=00:04:15.82 bitrate= 0.0kbits/s speed= 170x
[flac @ 000001c1f7b21fc0] No packets were sent for some of the attached pictures.
frame= 0 fps=0.0 q=0.0 Lsize= 117467kB time=00:05:09.70 bitrate=3107.1kbits/s speed= 165x
video:0kB audio:117458kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007065%
您可以在此处下载文件（我还分享了一个可以正常工作的文件以供比较）： https://ln.sync.com/dl/c22d42b70/g73wq4ay-eadtfpwv-jjansvmx-mu2ddgi6
我不知道这是否是 FFmpeg 的一个错误。
谢谢！
答案1
可能是错误。解决方法是执行解码后搜索：
ffmpeg -i "02 - Sad But True.uncompressedNotWorking.flac" -ss 15 out.flac 2> log.txt