转换 mp3 -> 带有静态图像的视频 (ffmpeg/libav & BASH)
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Convert mp3 -> Video with static image ( ffmpeg/libav & BASH )
提问by Max
Some years ago I used the following bash script to get a video out of mp3's and one image (so the image in the video was freezed over the length of the mp3), which worked out fine.
几年前，我使用以下 bash 脚本从 mp3 和一个图像中获取视频（因此视频中的图像在 mp3 的长度上被冻结），效果很好。
i=0;
for file in *.mp3;
do
i=$((i+1));
ffmpeg -loop 1 -shortest -y -i image.jpg -i $file -acodec copy -vcodec libx264 $file.flv;
done
Now I wanted to use this again for doing the same.
现在我想再次使用它来做同样的事情。
Problem:
问题：
It does not stop convertingat the end of the mp3. Means the current mp3 file eg. has a length of 3 minutes and the script converts until forever or I stop it, so the length of the flv is much bigger than 3 minutes.
它不会在 mp3 结束时停止转换。表示当前的 mp3 文件，例如。长度为 3 分钟，脚本会一直转换，否则我将停止它，因此 flv 的长度远大于 3 分钟。
(ffmpeg is installed, but with libav the same happens)
（已安装 ffmpeg，但使用 libav 也会发生同样的情况）
Output:
输出：
ffmpeg version 1.2.6-7:1.2.6-1~trusty1 Copyright (c) 2000-2014 the FFmpeg developers
built on Apr 26 2014 18:52:58 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --arch=amd64 --disable-stripping --enable-avresample --enable-pthreads --enable-runtime-cpudetect --extra-version='7:1.2.6-1~trusty1' --libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --enable-bzlib --enable-libdc1394 --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl --enable-postproc --enable-libcdio --enable-x11grab --enable-libx264 --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 53. 5.103 / 53. 5.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[image2 @ 0x6d0740] max_analyze_duration 5000000 reached at 5000000 microseconds
Input #0, image2, from 'Bild2.png':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgba, 382x417, 25 fps, 25 tbr, 25 tbn, 25 tbc
[mp3 @ 0x6c4ac0] max_analyze_duration 5000000 reached at 5015510 microseconds
[mp3 @ 0x6c4ac0] Estimating duration from bitrate, this may be inaccurate
Input #1, mp3, from 'sons.mp3':
Duration: 00:00:35.11, start: 0.000000, bitrate: 127 kb/s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
[libx264 @ 0x6da700] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x6da700] profile High 4:4:4 Predictive, level 2.1, 4:4:4 8-bit
[libx264 @ 0x6da700] 264 - core 142 r2389 956c8d8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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=4 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=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, flv, to 'sons.mp3.flv':
Metadata:
encoder : Lavf54.63.104
Stream #0:0: Video: h264 ([7][0][0][0] / 0x0007), yuv444p, 382x417, q=-1--1, 1k tbn, 25 tbc
Stream #0:1: Audio: mp3 ([2][0][0][0] / 0x0002), 44100 Hz, stereo, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (png -> libx264)
Stream #1:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
回答by gnou
First of all, I would highly recommend you to update ffmpegto a newer version. You are currently using v1.2.6-7, but as we speak, the current version is 2.3.3.
首先，我强烈建议您将ffmpeg 更新到较新的版本。您当前使用的是 v1.2.6-7，但正如我们所说，当前版本是 2.3.3。
Here is a working command (see ffmpeg wiki):
这是一个工作命令（参见ffmpeg wiki）：
ffmpeg -loop 1 -i image.jpg -i audio.mp3 -c:a copy -c:v libx264 -shortest out.mp4
Also, you could optimize overall weight by reencoding audio if you're using raw sound (aiff or wave) as input:
此外，如果您使用原始声音（aiff 或 wave）作为输入，您可以通过重新编码音频来优化整体重量：
ffmpeg -loop 1 -i image.jpg -i audio.wav -c:a aac -ab 112k -c:v libx264 -shortest -strict -2 out.mp4
For further reading, see this related stackoverflow post.
如需进一步阅读，请参阅此相关的 stackoverflow 帖子。
回答by Frank Taylor
ffmpeg -loop 1 -i image.jpg -i audio.mp3 -shortest -c:v libx264 -c:a copy result.mkv
works with version 3.4.2
适用于 3.4.2 版
