视频处理
查看视频信息
./ffprobe.exe /cygdrive/h/IMG_0024.mp4
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/cygdrive/h/IMG_0024.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
creation_time : 2020-08-25 17:54:46
Duration: 00:03:00.05, start: 0.000000, bitrate: 836 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
creation_time : 2020-08-25 17:54:46
handler_name : Core Media Audio
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 320x568, 706 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 23976 tbc (default)
Metadata:
creation_time : 2020-08-25 17:54:46
handler_name : Core Media Video
可以看出IMG_0024.mp4视频中包括音频视频2种流，音频流格式为aac，视频流格式为h264。
./ffprobe.exe -show_format /cygdrive/h/IMG_0024.mp4
./ffprobe.exe -show_streams /cygdrive/h/IMG_0024.mp4
视频格式转换
通过ffmpeg 命令对视频进行格式转换，然后通过ffprobe命令查看转换后的视频格式。
转换之前的视频格式：
./ffprobe.exe /cygdrive/h/IMG_0024.mp4
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/cygdrive/h/IMG_0024.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
creation_time : 2020-08-25 17:54:46
Duration: 00:03:00.05, start: 0.000000, bitrate: 836 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
creation_time : 2020-08-25 17:54:46
handler_name : Core Media Audio
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 320x568, 706 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 23976 tbc (default)
Metadata:
creation_time : 2020-08-25 17:54:46
handler_name : Core Media Video
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 /cygdrive/h/IMG_0024.avi
转换之后的视频格式：
./ffprobe.exe /cygdrive/h/IMG_0024.avi
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, avi, from '/cygdrive/h/IMG_0024.avi':
Metadata:
encoder : Lavf56.36.100
Duration: 00:03:00.11, start: 0.000000, bitrate: 555 kb/s
Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46), yuv420p, 320x568 [SAR 1:1 DAR 40:71], 352 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 2997 tbc
Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo, fltp, 192 kb/s
可以看到之前的视频流格式为h264，转换后的视频流格式为mpeg4。
视频转换为yuv格式：
yuv格式是一种原始格式。
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 /cygdrive/h/IMG_0024.yuv
./ffprobe.exe /cygdrive/h/IMG_0024.yuv
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
[IMGUTILS @ 0x22a614] Picture size 0x0 is invalid
[IMGUTILS @ 0x22a194] Picture size 0x0 is invalid
[rawvideo @ 0x2001a200] Could not find codec parameters for stream 0 (Video: rawvideo (I420 / 0x30323449), yuv420p, -4 kb/s): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
/cygdrive/h/IMG_0024.yuv: Operation not permitted
另一种方式转换为yuv格式：指定“-c:v y41p”
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 -c:v y41p /cygdrive/h/IMG_0024-c:v_y41p.yuv
./ffprobe.exe /cygdrive/h/IMG_0024-c:v_y41p.yuv ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
[IMGUTILS @ 0x22a614] Picture size 0x0 is invalid
[IMGUTILS @ 0x22a194] Picture size 0x0 is invalid
[rawvideo @ 0x2001a200] Could not find codec parameters for stream 0 (Video: rawvideo (I420 / 0x30323449), yuv420p, -4 kb/s): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
/cygdrive/h/IMG_0024-c:v_y41p.yuv: Operation not permitted
视频转换为flv格式：
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 /cygdrive/h/IMG_0024.flv
./ffprobe.exe /cygdrive/h/IMG_0024.flv
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, flv, from '/cygdrive/h/IMG_0024.flv':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
encoder : Lavf56.36.100
Duration: 00:03:00.09, start: 0.000000, bitrate: 773 kb/s
Stream #0:0: Video: flv1, yuv420p, 320x568, 200 kb/s, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc
Stream #0:1: Audio: adpcm_swf, 44100 Hz, stereo, s16, 352 kb/s
视频转换为mpg格式：
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 /cygdrive/h/IMG_0024.mpg
./ffprobe.exe /cygdrive/h/IMG_0024.mpg
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mpeg, from '/cygdrive/h/IMG_0024.mpg':
Duration: 00:03:00.09, start: 0.522456, bitrate: 856 kb/s
Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 320x568 [SAR 1:1 DAR 40:71], 104857 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc
Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16p, 384 kb/s
另一种方式转换为mpg格式：指定“-c:v mpeg1video”
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 -c:v mpeg1video /cygdrive/h/IMG_0024-c:v_mpeg1video.mpg
./ffprobe.exe /cygdrive/h/IMG_0024-c:v_mpeg1video.mpg
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mpeg, from '/cygdrive/h/IMG_0024-c:v_mpeg1video.mpg':
Duration: 00:03:00.09, start: 0.522456, bitrate: 856 kb/s
Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 320x568 [SAR 1:1 DAR 40:71], 104857 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc
Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16p, 384 kb/s
视频转换为mp4格式：
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 -strict -2 /cygdrive/h/IMG_0024-t.mp4
./ffprobe.exe /cygdrive/h/IMG_0024-t.mp4
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/cygdrive/h/IMG_0024-t.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf56.36.100
Duration: 00:03:00.12, start: 0.023220, bitrate: 488 kb/s
Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 320x568 [SAR 1:1 DAR 40:71], 353 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 2997 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
另一种方式转换为mp4格式：指定“-c:v mpeg4”
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 -strict -2 -c:v mpeg4 /cygdrive/h/IMG_0024-t2.mp4
./ffprobe.exe /cygdrive/h/IMG_0024-t2.mp4
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/cygdrive/h/IMG_0024-t2.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf56.36.100
Duration: 00:03:00.12, start: 0.023220, bitrate: 488 kb/s
Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 320x568 [SAR 1:1 DAR 40:71], 353 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 2997 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
视频转换为wmv格式：
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 /cygdrive/h/IMG_0024.wmv
./ffprobe.exe /cygdrive/h/IMG_0024.wmv
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, asf, from '/cygdrive/h/IMG_0024.wmv':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
encoder : Lavf56.36.100
Duration: 00:03:00.14, start: 0.000000, bitrate: 514 kb/s
Stream #0:0: Video: msmpeg4v3 (MP43 / 0x3334504D), yuv420p, 320x568, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc
Stream #0:1: Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels, fltp, 128 kb/s
另一种方式转换为wmv格式：指定“-c:v msmpeg4v3”
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 -c:v msmpeg4v3 /cygdrive/h/IMG_0024-c:v_msmpeg4v3.wmv
./ffprobe.exe /cygdrive/h/IMG_0024-c:v_msmpeg4v3.wmv
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, asf, from '/cygdrive/h/IMG_0024-c:v_msmpeg4v3.wmv':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
encoder : Lavf56.36.100
Duration: 00:03:00.14, start: 0.000000, bitrate: 514 kb/s
Stream #0:0: Video: msmpeg4v3 (MP43 / 0x3334504D), yuv420p, 320x568, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc
Stream #0:1: Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels, fltp, 128 kb/s
视频格式转换:指定帧大小
-s size set frame size (WxH or abbreviation)
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 -c:v y41p -s 320x180 /cygdrive/h/IMG_0024-c-v_y41p-s_320x180.yuv
./ffprobe.exe /cygdrive/h/IMG_0024-c-v_y41p-s_320x180.yuv ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
[IMGUTILS @ 0x22a614] Picture size 0x0 is invalid
[IMGUTILS @ 0x22a194] Picture size 0x0 is invalid
[rawvideo @ 0x2001a200] Could not find codec parameters for stream 0 (Video: rawvideo (I420 / 0x30323449), yuv420p, -4 kb/s): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
/cygdrive/h/IMG_0024-c-v_y41p-s_320x180.yuv: Operation not permitted
只提取视频中的视频流，丢弃音频流：
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 -vcodec copy -an /cygdrive/h/IMG_0024-vcodec_copy-an.mp4
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/cygdrive/h/IMG_0024-vcodec_copy-an.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Duration: 00:03:00.05, start: 0.000000, bitrate: 709 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 320x568, 706 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 23976 tbc (default)
Metadata:
handler_name : VideoHandler
视频合成：将一段视频和一段音频合成
先准备一个视频文件IMG_0024-audio.mp4，只有视频流：
./ffprobe.exe /cygdrive/h/IMG_0024-audio.mp4
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/cygdrive/h/IMG_0024-audio.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Duration: 00:03:00.05, start: 0.000000, bitrate: 709 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 320x568, 706 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 23976 tbc (default)
Metadata:
handler_name : VideoHandler
再准备一个音频文件yuganqingwuguan.mp3：
./ffprobe.exe /cygdrive/h/yuganqingwuguan.mp3
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
[mp3 @ 0x2001a200] Skipping 0 bytes of junk at 256.
[mp3 @ 0x2001a200] Estimating duration from bitrate, this may be inaccurate
Input #0, mp3, from '/cygdrive/h/yuganqingwuguan.mp3':
Metadata:
title : ▒▒▒▒▒▒▒
artist : ▒▒ǧɺ
genre : Other
Duration: 00:02:23.84, start: 0.000000, bitrate: 128 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
合成：
./ffmpeg -ss 0 -t 144 -i /cygdrive/h/IMG_0024-audio.mp4 -i /cygdrive/h/yuganqingwuguan.mp3 -strict -2 -vcodec copy /cygdrive/h/IMG_0024+yuganqingwuguan.mp3.mp4
这里视频文件IMG_0024-audio.mp4只有视频流，时长3分钟（180秒），音频文件yuganqingwuguan.mp3时长2分24秒（144秒）。所以在合成的时候只合成视频文件的前2分24秒（144秒）。
合成后的视频文件：
./ffprobe.exe /cygdrive/h/IMG_0024+yuganqingwuguan.mp3.mp4
ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/cygdrive/h/IMG_0024+yuganqingwuguan.mp3.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Duration: 00:02:24.17, start: 0.023220, bitrate: 850 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 320x568, 713 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 23976 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
视频抓图
./ffmpeg -i /cygdrive/h/IMG_0024.mp4 -f image2 -vf fps=fps=1 /cygdrive/h/IMG_0024/out%d.png
ffmpeg version 2.7.2 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.5.3 (GCC)
configuration: --enable-shared --prefix=/usr/local/ffmpeg
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/cygdrive/h/IMG_0024.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
creation_time : 2020-08-25 17:54:46
Duration: 00:03:00.05, start: 0.000000, bitrate: 836 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
creation_time : 2020-08-25 17:54:46
handler_name : Core Media Audio
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 320x568, 706 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 23976 tbc (default)
Metadata:
creation_time : 2020-08-25 17:54:46
handler_name : Core Media Video
Output #0, image2, to '/cygdrive/h/IMG_0024/out%d.png':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
encoder : Lavf56.36.100
Stream #0:0(und): Video: png, rgb24, 320x568, q=2-31, 200 kb/s, 1 fps, 1 tbn, 1 tbc (default)
Metadata:
creation_time : 2020-08-25 17:54:46
handler_name : Core Media Video
encoder : Lavc56.41.100 png
Stream mapping:
Stream #0:1 -> #0:0 (h264 (native) -> png (native))
Press [q] to stop, [?] for help
frame= 181 fps=1.0 q=0.0 Lsize=N/A time=00:03:01.00 bitrate=N/A
video:66941kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
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