当尝试使用 ffmpeg 运行视频转换或桌面录制时，我收到黄色警告消息：unknown side data type 10 (24 bytes)。在 Arch Linux x86_64 中使用从 git 存储库（git 版本）编译的 ffmpeg。
简单视频转换的输出：
$ ffmpeg -i video1.avi video2.mp4
ffmpeg version N-77722-g3ec5d8f Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.3.0 (GCC)
configuration: --prefix=/opt/ffmpeg-full-git --extra-cflags='-I/usr/include/nvidia-sdk -I/opt/x265-hg/include' --extra-ldflags='-L/opt/x265-hg/lib -Wl,-rpath -Wl,/opt/x265-hg/lib' --cpu=native --enable-rpath --enable-gpl --enable-version3 --enable-nonfree --enable-gray --disable-static --enable-shared --disable-htmlpages --disable-podpages --disable-txtpages --enable-avresample --enable-videotoolbox --enable-avisynth --enable-chromaprint --enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gmp --enable-gnutls --enable-ladspa --enable-libaacplus --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcelt --enable-libcdio --enable-libdc1394 --enable-libdcadec --enable-libfaac --enable-libfdk-aac --enable-libflite --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libiec61883 --enable-libilbc --enable-libkvazaar --enable-libmodplug --enable-libmp3lame --enable-libnut --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopencv --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-libquvi --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsmbclient --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtesseract --enable-libtheora --enable-libtwolame --enable-libutvideo --enable-libv4l2 --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxcb-shape --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-decklink --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-openssl --enable-x11grab
libavutil 55. 12.100 / 55. 12.100
libavcodec 57. 22.100 / 57. 22.100
libavformat 57. 21.101 / 57. 21.101
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 23.100 / 6. 23.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, avi, from 'video1.avi':
Metadata:
encoder : Lavf52.31.0
Duration: 00:04:09.40, start: 0.000000, bitrate: 633 kb/s
Stream #0:0: Video: mpeg4 (Simple Profile) (XVID / 0x44495658), yuv420p, 892x668 [SAR 1:1 DAR 223:167], 497 kb/s, 5 fps, 5 tbr, 5 tbn, 5 tbc
Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16p, 128 kb/s
[libx264 @ 0x27e77e0] using SAR=1/1
[libx264 @ 0x27e77e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x27e77e0] profile High, level 3.1
[libx264 @ 0x27e77e0] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'video2.mp4':
Metadata:
encoder : Lavf57.21.101
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 892x668 [SAR 1:1 DAR 223:167], q=-1--1, 5 fps, 10240 tbn, 5 tbc
Metadata:
encoder : Lavc57.22.100 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
Metadata:
encoder : Lavc57.22.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (mp3 (native) -> aac (native))
Press [q] to stop, [?] for help
frame= 1247 fps=139 q=-1.0 Lsize= 5433kB time=00:04:09.24 bitrate= 178.6kbits/s dup=2 drop=0 speed=27.8x
video:1464kB audio:3891kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.446609%
[libx264 @ 0x27e77e0] frame I:6 Avg QP: 9.37 size: 89238
[libx264 @ 0x27e77e0] frame P:338 Avg QP:16.29 size: 2085
[libx264 @ 0x27e77e0] frame B:903 Avg QP:20.75 size: 286
[libx264 @ 0x27e77e0] consecutive B-frames: 3.3% 0.0% 1.4% 95.3%
[libx264 @ 0x27e77e0] mb I I16..4: 56.4% 4.2% 39.4%
[libx264 @ 0x27e77e0] mb P I16..4: 1.1% 0.3% 0.4% P16..4: 3.1% 0.4% 0.4% 0.0% 0.0% skip:94.4%
[libx264 @ 0x27e77e0] mb B I16..4: 0.4% 0.2% 0.0% B16..8: 2.9% 0.1% 0.0% direct: 0.0% skip:96.4% L0:56.6% L1:43.1% BI: 0.3%
[libx264 @ 0x27e77e0] 8x8 transform intra:17.0% inter:56.4%
[libx264 @ 0x27e77e0] coded y,uvDC,uvAC intra: 17.8% 25.8% 20.4% inter: 0.3% 0.7% 0.4%
[libx264 @ 0x27e77e0] i16 v,h,dc,p: 38% 60% 2% 0%
[libx264 @ 0x27e77e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 7% 22% 69% 1% 0% 0% 0% 0% 1%
[libx264 @ 0x27e77e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 27% 18% 4% 5% 3% 3% 2% 4%
[libx264 @ 0x27e77e0] i8c dc,h,v,p: 46% 39% 14% 1%
[libx264 @ 0x27e77e0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x27e77e0] ref P L0: 67.1% 4.6% 17.9% 10.4%
[libx264 @ 0x27e77e0] ref B L0: 64.2% 32.5% 3.2%
[libx264 @ 0x27e77e0] ref B L1: 93.0% 7.0%
[libx264 @ 0x27e77e0] kb/s:48.07
[aac @ 0x27e8700] Qavg: 633.592
即使在更完整的命令中，相同的警告仍然存在。例如，当尝试记录桌面时：
$ ffmpeg -f pulse -thread_queue_size 512 -ac 2 -channel_layout stereo -i default -f x11grab -thread_queue_size 512 -r 60 -s 1280x720 -i :0.0+224,235 -acodec pcm_s16le -vcodec libx264 -r 60 -preset ultrafast -qp 0 -pix_fmt yuv444p -threads 0 screencast.mkv
ffmpeg version N-77722-g3ec5d8f Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.3.0 (GCC)
configuration: --prefix=/opt/ffmpeg-full-git --extra-cflags='-I/usr/include/nvidia-sdk -I/opt/x265-hg/include' --extra-ldflags='-L/opt/x265-hg/lib -Wl,-rpath -Wl,/opt/x265-hg/lib' --cpu=native --enable-rpath --enable-gpl --enable-version3 --enable-nonfree --enable-gray --disable-static --enable-shared --disable-htmlpages --disable-podpages --disable-txtpages --enable-avresample --enable-videotoolbox --enable-avisynth --enable-chromaprint --enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gmp --enable-gnutls --enable-ladspa --enable-libaacplus --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcelt --enable-libcdio --enable-libdc1394 --enable-libdcadec --enable-libfaac --enable-libfdk-aac --enable-libflite --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libiec61883 --enable-libilbc --enable-libkvazaar --enable-libmodplug --enable-libmp3lame --enable-libnut --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopencv --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-libquvi --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsmbclient --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtesseract --enable-libtheora --enable-libtwolame --enable-libutvideo --enable-libv4l2 --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxcb-shape --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-decklink --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-openssl --enable-x11grab
libavutil 55. 12.100 / 55. 12.100
libavcodec 57. 22.100 / 57. 22.100
libavformat 57. 21.101 / 57. 21.101
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 23.100 / 6. 23.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, pulse, from 'default':
Duration: N/A, start: 1452122996.525850, bitrate: 1536 kb/s
Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Input #1, x11grab, from ':0.0+224,235':
Duration: N/A, start: 1452122997.816378, bitrate: N/A
Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1280x720, 60 fps, 60 tbr, 1000k tbn, 60 tbc
[libx264 @ 0x283ed40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x283ed40] profile High 4:4:4 Predictive, level 3.2, 4:4:4 8-bit
[libx264 @ 0x283ed40] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=cqp mbtree=0 qp=0
Output #0, matroska, to 'screencast.mkv':
Metadata:
encoder : Lavf57.21.101
Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p, 1280x720, q=-1--1, 60 fps, 1k tbn, 60 tbc
Metadata:
encoder : Lavc57.22.100 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
Metadata:
encoder : Lavc57.22.100 pcm_s16le
Stream mapping:
Stream #1:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
frame= 748 fps= 56 q=-1.0 Lsize= 10237kB time=00:00:12.58 bitrate=6662.7kbits/s speed=0.948x
video:7871kB audio:2360kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.063400%
[libx264 @ 0x283ed40] frame I:3 Avg QP: 0.00 size:304901
[libx264 @ 0x283ed40] frame P:745 Avg QP: 0.00 size: 9590
[libx264 @ 0x283ed40] mb I I16..4: 100.0% 0.0% 0.0%
[libx264 @ 0x283ed40] mb P I16..4: 46.1% 0.0% 0.0% P16..4: 1.0% 0.0% 0.0% 0.0% 0.0% skip:52.8%
[libx264 @ 0x283ed40] coded y,u,v intra: 1.1% 0.2% 0.2% inter: 1.8% 0.3% 0.3%
[libx264 @ 0x283ed40] i16 v,h,dc,p: 99% 1% 0% 0%
[libx264 @ 0x283ed40] kb/s:5171.57
它似乎不是一个特定的 H.264 警告，因为在使用 VP9 视频编解码器时也会显示它。
这个警告是什么意思？我需要做什么来修复它？谢谢。
答案1
忽略它。自从 12 月中旬构建以来，该消息经常弹出。但我的命令与各种输入一样正常处理。
有趣的是，代码于 2014 年 2 月添加，但直到最近才看到这些消息。