Tente o seguinte comando:
ffmpeg -i <file name>
Se você tem um arquivo que pode ser manipulado, obtém uma saída como esta:
ffmpeg -i KEY.mov ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers built on Jun 13 2013 12:22:32 with llvm-gcc 4.2.1 (LLVM build 2336.11.00) configuration: --disable-yasm libavutil 52. 18.100 / 52. 18.100 libavcodec 54. 92.100 / 54. 92.100 libavformat 54. 63.104 / 54. 63.104 libavdevice 54. 3.103 / 54. 3.103 libavfilter 3. 42.103 / 3. 42.103 libswscale 2. 2.100 / 2. 2.100 libswresample 0. 17.102 / 0. 17.102 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Sysmex_Mockup_KEY.mov': Metadata: major_brand : qt
minor_version : 537199360 compatible_brands: qt
creation_time : 2013-04-19 14:54:18 Duration: 00:08:28.50, start: 0.000000, bitrate: 2151 kb/s Stream #0:0(eng): Audio: pcm_s16le (sowt / 0x74776F73), 44100 Hz, stereo, s16, 1411 kb/s Metadata: creation_time : 2013-04-19 15:02:07 handler_name : Apple Alias-Datensteuerung Stream #0:1(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1024x768, 737 kb/s, 30 fps, 30 tbr, 3k tbn, 6k tbc Metadata: creation_time : 2013-04-19 15:02:07 handler_name : Apple Alias-Datensteuerung
Caso contrário, a saída se parece com:
ffmpeg -i A_left.jpg ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers built on Jun 13 2013 12:22:32 with llvm-gcc 4.2.1 (LLVM build 2336.11.00) configuration: --disable-yasm libavutil 52. 18.100 / 52. 18.100 libavcodec 54. 92.100 / 54. 92.100 libavformat 54. 63.104 / 54. 63.104 libavdevice 54. 3.103 / 54. 3.103 libavfilter 3. 42.103 / 3. 42.103 libswscale 2. 2.100 / 2. 2.100 libswresample 0. 17.102 / 0. 17.102 Input #0, image2, from 'IWABD_1280_A_left.jpg': Duration: 00:00:00.04, start: 0.000000, bitrate: N/A Stream #0:0: Video: mjpeg, yuvj444p, 1280x1024 [SAR 100:100 DAR 5:4], 25 tbr, 25 tbn, 25 tbc