Wenn ich versuche, eine sehr alte AVI-Datei mit ffmpeg in eine MP4-Datei umzuwandeln, verschwindet das Miniaturbild. Gibt es eine Möglichkeit, das Miniaturbild beizubehalten oder automatisch direkt aus dem Videostream eines zu generieren, beispielsweise mithilfe des ersten Frames, ohne ein Bild speichern und dann hinzufügen zu müssen? Ich verwende Win10 und versuche, die Dateien im Windows Explorer anzuzeigen.
Protokoll:
ffmpeg version git-2020-07-16-d11cc74 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9.3.1 (GCC) 20200621
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --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-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
libavutil 56. 55.100 / 56. 55.100
libavcodec 58. 96.100 / 58. 96.100
libavformat 58. 48.100 / 58. 48.100
libavdevice 58. 11.101 / 58. 11.101
libavfilter 7. 87.100 / 7. 87.100
libswscale 5. 8.100 / 5. 8.100
libswresample 3. 8.100 / 3. 8.100
libpostproc 55. 8.100 / 55. 8.100
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, avi, from 'in.avi':
Metadata:
creation_time : 2004-03-14 13:53:17
encoder : CanonMVI01
Duration: 00:00:30.00, start: 0.000000, bitrate: 5217 kb/s
Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 640x480, 5136 kb/s, 15 fps, 15 tbr, 15 tbn, 15 tbc
Stream #0:1: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 11024 Hz, mono, u8, 88 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
[aac @ 0000023cd2571a40] Too many bits 17832.925170 > 6144 per frame requested, clamping to max
[libx264 @ 0000023cd256fb00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0000023cd256fb00] profile High 4:2:2, level 2.2, 4:2:2, 8-bit
[libx264 @ 0000023cd256fb00] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - 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=6 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=15 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=15 ip_ratio=1.40 pb_ratio=1.30 aq=0
Output #0, mp4, to 'out.mp4':
Metadata:
encoder : Lavf58.48.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuvj422p(pc), 640x480, q=-1--1, 15 fps, 500k tbn, 15 tbc
Metadata:
encoder : Lavc58.96.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 11025 Hz, mono, fltp, 66 kb/s
Metadata:
encoder : Lavc58.96.100 aac
frame= 450 fps= 32 q=-1.0 Lsize= 21274kB time=00:00:30.00 bitrate=5809.2kbits/s speed=2.15x
video:21065kB audio:195kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.062795%
[libx264 @ 0000023cd256fb00] frame I:2 Avg QP:12.00 size: 59822
[libx264 @ 0000023cd256fb00] frame P:117 Avg QP:15.00 size: 57718
[libx264 @ 0000023cd256fb00] frame B:331 Avg QP:16.66 size: 44404
[libx264 @ 0000023cd256fb00] consecutive B-frames: 1.3% 0.9% 2.7% 95.1%
[libx264 @ 0000023cd256fb00] mb I I16..4: 0.1% 99.5% 0.3%
[libx264 @ 0000023cd256fb00] mb P I16..4: 0.0% 55.3% 7.8% P16..4: 9.2% 16.1% 11.5% 0.0% 0.0% skip: 0.0%
[libx264 @ 0000023cd256fb00] mb B I16..4: 0.1% 25.5% 0.3% B16..8: 25.6% 19.7% 7.7% direct:20.1% skip: 1.0% L0:17.5% L1:13.5% BI:69.0%
[libx264 @ 0000023cd256fb00] 8x8 transform intra:93.4% inter:84.1%
[libx264 @ 0000023cd256fb00] coded y,uvDC,uvAC intra: 98.8% 79.8% 22.5% inter: 97.3% 94.2% 42.8%
[libx264 @ 0000023cd256fb00] i16 v,h,dc,p: 4% 25% 16% 55%
[libx264 @ 0000023cd256fb00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 19% 52% 2% 2% 2% 4% 2% 5%
[libx264 @ 0000023cd256fb00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 20% 15% 7% 9% 6% 11% 6% 13%
[libx264 @ 0000023cd256fb00] i8c dc,h,v,p: 45% 21% 33% 2%
[libx264 @ 0000023cd256fb00] Weighted P-Frames: Y:6.0% UV:1.7%
[libx264 @ 0000023cd256fb00] ref P L0: 38.4% 25.7% 19.4% 15.7% 0.8%
[libx264 @ 0000023cd256fb00] ref B L0: 88.3% 9.6% 2.1%
[libx264 @ 0000023cd256fb00] ref B L1: 94.8% 5.2%
[libx264 @ 0000023cd256fb00] kb/s:5752.13
[aac @ 0000023cd2571a40] Qavg: 58267.156
Antwort1
Hinzufügen -vf format=yuv420p:
ffmpeg -i in.avi -qp 15 -c:v h264 -c:a aac -b:a 192k -vf format=yuv420p out.mp4
Dadurch wird ein kompatibles Chroma-Subsampling-Schema verwendet. Andernfalls wählt der Encoder libx264 das Chroma-Subsampling, das der Eingabe am ähnlichsten ist, aber von den meisten Playern oder Dateimanagern nicht gelesen werden kann.