FFmpeg | Day1 FFmpege音视频开发与学习
时间：2026年3月18日23:08:07
文章目录
1.参考
2.实践、学习
bmp转jpg
bash
[fly@553e45aa1e41 docs]$ ffmpeg -i juren.bmp juren.jpg
ffmpeg version 3.4.11-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
[bmp_pipe @ 0x5ca7e981a8c0] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, bmp_pipe, from 'juren.bmp':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: bmp, bgr24, 1920x1080, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (bmp (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x5ca7e9e23f40] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to 'juren.jpg':
Metadata:
encoder : Lavf57.83.100
Stream #0:0: Video: mjpeg, yuvj444p(pc), 1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
Metadata:
encoder : Lavc57.107.100 mjpeg
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 1 fps=0.0 q=7.2 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.854x
video:61kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[fly@553e45aa1e41 docs]$ ls -l
总用量 6140
-rw-r--r-- 1 root root 6220854 3月 17 21:29 juren.bmp
-rw-r--r-- 1 fly fly 62825 3月 18 23:05 juren.jpg
[fly@553e45aa1e41 docs]$ ls -lh
总用量 6.0M
-rw-r--r-- 1 root root 6.0M 3月 17 21:29 juren.bmp
-rw-r--r-- 1 fly fly 62K 3月 18 23:05 juren.jpg