我在用着FFmpeg将 gif 转换为 mp4 文件。在某些 gif 文件上我遇到了错误invalid block label。该程序似乎仍会输出一个正常的 mp4 文件，但我宁愿它一开始就不遇到错误。我发现我在此主题
user@mediaserver:/temp$ ffmpeg -i /temp/input.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" /temp/output.mp4
ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Input #0, gif, from '/temp/input.gif':
Metadata:
comment : Created with ezgif.com video to GIF converter
Duration: 00:00:01.28, start: 0.000000, bitrate: 207257 kb/s
Stream #0:0: Video: gif, bgra, 600x1067 [SAR 64:64 DAR 600:1067], 25 fps, 25 tbr, 100 tbn, 100 tbc
Stream mapping:
Stream #0:0 -> #0:0 (gif (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x559776c48980] using SAR=1066/1067
[libx264 @ 0x559776c48980] using cpu capabilities: MMX2 SSE2Slow
[libx264 @ 0x559776c48980] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x559776c48980] 264 - core 163 r3060 5db6aa6 - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - 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=9 lookahead_threads=1 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=25 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 '/temp/output.mp4':
Metadata:
comment : Created with ezgif.com video to GIF converter
encoder : Lavf58.76.100
Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(tv, progressive), 600x1066 [SAR 1066:1067 DAR 600:1067], q=2-31, 25 fps, 12800 tbn
Metadata:
encoder : Lavc58.134.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
[gif @ 0x559776c38f00] LZW decode failedB time=00:00:00.00 bitrate=N/A speed= 0x
[gif @ 0x559776c35b00] invalid block label
[mp4 @ 0x559776c47580] Starting second pass: moving the moov atom to the beginning of the file
frame= 32 fps=0.0 q=-1.0 Lsize= 370kB time=00:00:01.16 bitrate=2614.8kbits/s speed=1.38x
video:369kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.351198%
[libx264 @ 0x559776c48980] frame I:1 Avg QP:24.32 size: 38869
[libx264 @ 0x559776c48980] frame P:8 Avg QP:24.95 size: 17974
[libx264 @ 0x559776c48980] frame B:23 Avg QP:26.28 size: 8456
[libx264 @ 0x559776c48980] consecutive B-frames: 3.1% 0.0% 9.4% 87.5%
[libx264 @ 0x559776c48980] mb I I16..4: 22.7% 63.6% 13.7%
[libx264 @ 0x559776c48980] mb P I16..4: 4.6% 21.3% 1.6% P16..4: 36.5% 12.6% 8.4% 0.0% 0.0% skip:15.0%
[libx264 @ 0x559776c48980] mb B I16..4: 0.5% 3.6% 0.1% B16..8: 43.6% 6.9% 2.0% direct: 3.6% skip:39.7% L0:46.6% L1:50.7% BI: 2.7%
[libx264 @ 0x559776c48980] 8x8 transform intra:76.0% inter:81.8%
[libx264 @ 0x559776c48980] coded y,uvDC,uvAC intra: 60.4% 39.6% 6.8% inter: 18.2% 10.9% 0.2%
[libx264 @ 0x559776c48980] i16 v,h,dc,p: 4% 16% 5% 75%
[libx264 @ 0x559776c48980] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 17% 31% 6% 8% 7% 9% 5% 5%
[libx264 @ 0x559776c48980] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 21% 21% 5% 8% 7% 9% 5% 5%
[libx264 @ 0x559776c48980] i8c dc,h,v,p: 61% 23% 12% 4%
[libx264 @ 0x559776c48980] Weighted P-Frames: Y:12.5% UV:0.0%
[libx264 @ 0x559776c48980] ref P L0: 54.5% 10.5% 21.0% 12.8% 1.2%
[libx264 @ 0x559776c48980] ref B L0: 85.2% 11.4% 3.5%
[libx264 @ 0x559776c48980] ref B L1: 94.8% 5.2%
[libx264 @ 0x559776c48980] kb/s:2357.26
无法将其转换为 gif，这很合理，因为日志中存在 LZW 解码失败错误。如果有人能告诉我如何修复此问题，我将不胜感激。