Como recuperar informação de ficheiros de vídeo a partir da linha de comando sob Linux?

Dê mediainfo uma tentativa. Na linha de comando do tipo mediainfo input.mkv. Para informações mais detalhadas sobre o vídeo mediainfo --fullscan input.mkv.

Exemplo de saída:

General Unique ID : 239093944660469735839645243666869007606 (0xB3DFD199E22F0E7CBAE1FE52206834F6) Complete name : input.mkv Format : Matroska Format version : Version 2 File size : 39.6 MiB Duration : 20s 288ms Overall bit rate mode : Variable Overall bit rate : 16.4 Mbps Movie name : My best movie Encoded date : UTC 2012-11-10 16:42:02 Writing application : mkvmerge v5.8.0 ('No Sleep / Pillow') built on Sep 2 2012 15:37:04 Writing library : libebml v1.2.3 + libmatroska v1.3.0 Produzent : ??? ??????? Thanks to : Bruce Davey Lead performer : Rudy Youngblood Remixed by : ©???? Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4.0 MultiView\_Count : 2 Format settings, CABAC : Yes Format settings, ReFrames : 2 frames Format settings, GOP : M=2, N=13 Muxing mode : Header stripping Codec ID : V\_MPEG4/ISO/AVC Duration : 20s 280ms Bit rate mode : Variable Bit rate : 15.8 Mbps Maximum bit rate : 16.0 Mbps Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 25.000 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Interlaced Scan order : Top Field First Bits/(Pixel\*Frame) : 0.304 Stream size : 38.2 MiB (96%) Title : Sony Hardware Video H.264 Encoder Language : English Default : Yes Forced : No Audio ID : 2 Format : AC-3 Format/Info : Audio Coding 3 Mode extension : CM (complete main) Format settings, Endianness : Big Muxing mode : Header stripping Codec ID : A\_AC3 Duration : 20s 288ms Bit rate mode : Constant Bit rate : 256 Kbps Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 48.0 KHz Bit depth : 16 bits Compression mode : Lossy Delay relative to video : -80ms Stream size : 634 KiB (2%) Title : Sony Hardware Audio AC3 Encoder Language : Russian Default : Yes Forced : No Text ID : 3 Format : PGS Muxing mode : zlib Codec ID : S\_HDMV/PGS Codec ID/Info : The same subtitle format used on BDs/HD-DVDs Title : Sony Hardware PGS Encoder Language : English Default : Yes Forced : No
```.

ffprobe

sob Ubuntu:

sudo apt install ffmpeg
ffprobe a.mp4

Para obter informações sobre o formato, fluxos, etc., correr:

ffprobe -v error -show_format -show_streams a.mp4

[STREAM]
index=0
codec_name=h264
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
profile=High
codec_type=video
codec_time_base=1/50
codec_tag_string=avc1
codec_tag=0x31637661
width=320
height=240
has_b_frames=2
sample_aspect_ratio=1:1
display_aspect_ratio=4:3
pix_fmt=yuv420p
level=13
color_range=N/A
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=left
timecode=N/A
refs=4
is_avc=1
nal_length_size=4
id=N/A
r_frame_rate=25/1
avg_frame_rate=25/1
time_base=1/12800
start_pts=0
start_time=0.000000
duration_ts=384000
duration=30.000000
bit_rate=34761
max_bit_rate=N/A
bits_per_raw_sample=8
nb_frames=750
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
TAG:language=und
TAG:handler_name=VideoHandler
[/STREAM]
[STREAM]
index=1
codec_name=aac
codec_long_name=AAC (Advanced Audio Coding)
profile=LC
codec_type=audio
codec_time_base=1/44100
codec_tag_string=mp4a
codec_tag=0x6134706d
sample_fmt=fltp
sample_rate=44100
channels=1
channel_layout=mono
bits_per_sample=0
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/44100
start_pts=-1024
start_time=-0.023220
duration_ts=1324024
duration=30.023220
bit_rate=56517
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=1293
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
TAG:language=und
TAG:handler_name=SoundHandler
[/STREAM]
[FORMAT]
filename=input.mp4
nb_streams=2
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=-0.023220
duration=30.024000
size=368644
bit_rate=98226
probe_score=100
TAG:major_brand=isom
TAG:minor_version=512
TAG:compatible_brands=isomiso2avc1mp41
TAG:title=FFprobe Tips
TAG:encoder=Lavf56.15.101
[/FORMAT]

Também pode sair como JSON ou CSV. Ver mais sobre ffprobe .

ExifTool

Sob Ubuntu:

sudo apt install libimage-exiftool-perl
exiftool a.mp4

Saída de amostra:

ExifTool Version Number : 10.00
File Name : lego.mp4
Directory : .
File Size : 375 kB
File Modification Date/Time : 2016:02:03 17:18:15+01:00
File Access Date/Time : 2016:02:03 17:18:49+01:00
File Inode Change Date/Time : 2016:02:03 17:18:49+01:00
File Permissions : rw-rw-r--
File Type : MP4
File Type Extension : mp4
MIME Type : video/mp4
Major Brand : MP4 v2 [ISO 14496-14]
Minor Version : 0.0.0
Compatible Brands : mp42, isom, avc1
Movie Data Size : 379872
Movie Data Offset : 168
Movie Header Version : 0
Create Date : 2010:03:20 21:29:11
Modify Date : 2010:03:20 21:29:12
Time Scale : 90000
Duration : 5.57 s
Preferred Rate : 1
Preferred Volume : 100.00%
Preview Time : 0 s
Preview Duration : 0 s
Poster Time : 0 s
Selection Time : 0 s
Selection Duration : 0 s
Current Time : 0 s
Next Track ID : 3
Track Header Version : 0
Track Create Date : 2010:03:20 21:29:11
Track Modify Date : 2010:03:20 21:29:12
Track ID : 1
Track Duration : 5.53 s
Track Layer : 0
Track Volume : 0.00%
Image Width : 560
Image Height : 320
Graphics Mode : srcCopy
Op Color : 0 0 0
Compressor ID : avc1
Source Image Width : 560
Source Image Height : 320
X Resolution : 72
Y Resolution : 72
Compressor Name : JVT/AVC Coding
Bit Depth : 24
Color Representation : nclc 1 1 1
Video Frame Rate : 30
Matrix Structure : 1 0 0 0 1 0 0 0 1
Media Header Version : 0
Media Create Date : 2010:03:20 21:29:11
Media Modify Date : 2010:03:20 21:29:12
Media Time Scale : 48000
Media Duration : 5.57 s
Media Language Code : eng
Balance : 0
Audio Format : mp4a
Audio Channels : 1
Audio Bits Per Sample : 16
Audio Sample Rate : 48000
Track 2 Name : Stereo
Handler Type : Metadata
Encoder : HandBrake 0.9.4 2009112300
Avg Bitrate : 546 kbps
Image Size : 560x320
Megapixels : 0.179
Rotation : 0

Veja também: https://askubuntu.com/questions/249828/command-to-see-media-file-info-in-terminal

Testado no Ubuntu 18.10.

Pode usar o mplayer:

mplayer -vo null -ao null -frames 0 -identify videofile.mp4

Output:

MPlayer 1.1-4.2.1 (C) 2000-2012 MPlayer Team
Can't init Apple Remote.

Playing vid.mp4.
libavformat version 54.6.101 (internal)
libavformat file format detected.
ID_VIDEO_ID=0
[lavf] stream 0: video (h264), -vid 0
ID_AUDIO_ID=0
[lavf] stream 1: audio (aac), -aid 0, -alang und
VIDEO: [H264] 480x360 24bpp 29.970 fps 700.7 kbps (85.5 kbyte/s)
Clip info:
 major_brand: qt
ID_CLIP_INFO_NAME0=major_brand
ID_CLIP_INFO_VALUE0=qt
 minor_version: 0
ID_CLIP_INFO_NAME1=minor_version
ID_CLIP_INFO_VALUE1=0
 compatible_brands: qt
ID_CLIP_INFO_NAME2=compatible_brands
ID_CLIP_INFO_VALUE2=qt
 creation_time: 2011-03-03 15:42:30
ID_CLIP_INFO_NAME3=creation_time
ID_CLIP_INFO_VALUE3=2011-03-03 15:42:30
 encoder: 4.2.1
ID_CLIP_INFO_NAME4=encoder
ID_CLIP_INFO_VALUE4=4.2.1
 encoder-eng: 4.2.1
ID_CLIP_INFO_NAME5=encoder-eng
ID_CLIP_INFO_VALUE5=4.2.1
 date: 2011-03-03T10:42:30-0500
ID_CLIP_INFO_NAME6=date
ID_CLIP_INFO_VALUE6=2011-03-03T10:42:30-0500
 date-eng: 2011-03-03T10:42:30-0500
ID_CLIP_INFO_NAME7=date-eng
ID_CLIP_INFO_VALUE7=2011-03-03T10:42:30-0500
ID_CLIP_INFO_N=8
Load subtitles in ./
ID_FILENAME=vid.mp4
ID_DEMUXER=lavfpref
ID_VIDEO_FORMAT=H264
ID_VIDEO_BITRATE=700712
ID_VIDEO_WIDTH=480
ID_VIDEO_HEIGHT=360
ID_VIDEO_FPS=29.970
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_FORMAT=MP4A
ID_AUDIO_BITRATE=63600
ID_AUDIO_RATE=44100
ID_AUDIO_NCH=1
ID_START_TIME=0.00
ID_LENGTH=3.83
ID_SEEKABLE=1
ID_CHAPTERS=0
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 54.23.100 (internal)
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
ID_VIDEO_CODEC=ffh264
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 1 ch, s16le, 63.6 kbit/9.01% (ratio: 7950->88200)
ID_AUDIO_BITRATE=63600
ID_AUDIO_RATE=44100
ID_AUDIO_NCH=1
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
AO: [null] 44100Hz 1ch s16le (2 bytes per sample)
ID_AUDIO_CODEC=ffaac
Starting playback...

Exiting... (End of file)
ID_EXIT=EOF

Como Günay Gültekin escreveu, só se pode obter um atributo específico, mas faltavam as citações:

mediaInfo --Output='Video;%Duration%' filename.mp4

Com base nisto, escrevi um pequeno invólucro para calcular a duração dos ficheiros encontrados, com um resumo:

echo "scale=2; ($(find /foo/bar -type f -exec mediainfo --Output='Video;%Duration%+' {} \; | grep -v ^$ | tr -d \n)0)"/60000/60|bc

Mediainfo é uma grande ferramenta. Como alternativa, pode agarrar os detalhes usando também ffprobe*.

$ ffprobe -hide_banner -loglevel fatal -show_error -show_format -show_streams -show_programs -show_chapters -show_private_data -print_format json /home/sathish/Videos/Aandipatti.mp4

Aqui está a saída

{
    "programs": [

    ],
    "streams": [
        {
            "index": 0,
            "codec_name": "h264",
            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
            "profile": "High",
            "codec_type": "video",
            "codec_time_base": "28113749/1349640000",
            "codec_tag_string": "avc1",
            "codec_tag": "0x31637661",
            "width": 1920,
            "height": 1080,
            "coded_width": 1920,
            "coded_height": 1080,
            "has_b_frames": 1,
            "sample_aspect_ratio": "1:1",
            "display_aspect_ratio": "16:9",
            "pix_fmt": "yuv420p",
            "level": 40,
            "color_range": "tv",
            "color_space": "bt709",
            "color_transfer": "bt709",
            "color_primaries": "bt709",
            "chroma_location": "left",
            "refs": 1,
            "is_avc": "true",
            "nal_length_size": "4",
            "r_frame_rate": "24/1",
            "avg_frame_rate": "674820000/28113749",
            "time_base": "1/90000",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 28113750,
            "duration": "312.375000",
            "bit_rate": "2612895",
            "bits_per_raw_sample": "8",
            "nb_frames": "7498",
            "disposition": {
                "default": 1,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0
            },
            "tags": {
                "language": "und",
                "handler_name": "VideoHandler"
            }
        },
        {
            "index": 1,
            "codec_name": "aac",
            "codec_long_name": "AAC (Advanced Audio Coding)",
            "profile": "LC",
            "codec_type": "audio",
            "codec_time_base": "1/44100",
            "codec_tag_string": "mp4a",
            "codec_tag": "0x6134706d",
            "sample_fmt": "fltp",
            "sample_rate": "44100",
            "channels": 2,
            "channel_layout": "stereo",
            "bits_per_sample": 0,
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/44100",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 13779971,
            "duration": "312.470998",
            "bit_rate": "125595",
            "max_bit_rate": "125595",
            "nb_frames": "13457",
            "disposition": {
                "default": 1,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0
            },
            "tags": {
                "language": "und",
                "handler_name": "SoundHandler"
            }
        }
    ],
    "chapters": [

    ],
    "format": {
        "filename": "/home/sathish/Videos/Aandipatti.mp4",
        "nb_streams": 2,
        "nb_programs": 0,
        "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
        "format_long_name": "QuickTime / MOV",
        "start_time": "0.000000",
        "duration": "312.471000",
        "size": "107155047",
        "bit_rate": "2743423",
        "probe_score": 100,
        "tags": {
            "major_brand": "isom",
            "minor_version": "512",
            "compatible_brands": "isomiso2avc1mp41",
            "encoder": "Lavf56.40.101"
        }
    }
}

Em distribuições recentes de linux também se pode obter informação usando avconv:

$ avconv -i ch1_video_01.mpg 
avconv version 9.18-6:9.18-0ubuntu0.14.04.1, Copyright (c) 2000-2014 the Libav developers
  built on Mar 16 2015 13:19:10 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
[mpeg @ 0x722840] max_analyze_duration reached
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mpeg, from 'ch1_video_01.mpg':
  Duration: 00:03:48.01, start: 0.274000, bitrate: 6042 kb/s
    Stream #0.0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [PAR 64:45 DAR 16:9], 8000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16p, 256 kb/s
At least one output file must be specified