Home / ubuntu / Questions / 1217238
Accepted
Sybil
Asked: 2020-03-15 22:23:16 +0800 CST

How to identify on command line VR videos? .. And batch delete them

  • 772

Sometimes I accidentaly download VR (Virtual reality) videos. I can't view VR videos on my Linux box (even on macOS its not working).

How to identify VR videos (mediainfo or similar tool) and delete them in a folder like /torrents/complete?

Here example video meta data:

$ mediainfo example.mp4
General
Complete name                            : example.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 83.1 MiB
Duration                                 : 9 min 40 s
Overall bit rate                         : 1 201 kb/s
Writing application                      : Lavf58.0.100

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : [email protected]
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 9 min 40 s
Bit rate                                 : 1 067 kb/s
Width                                    : 1 440 pixels
Height                                   : 720 pixels
Display aspect ratio                     : 2.000
Frame rate mode                          : Constant
Frame rate                               : 25.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.041
Stream size                              : 73.8 MiB (89%)
Writing library                          : x264 core 152 r19 ba24899
Encoding settings                        : cabac=1 / ref=1 / deblock=1:0:0 / analyse=0x3:0x3 / me=dia / subme=1 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=12 / lookahead_threads=2 / 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=1 / keyint=125 / keyint_min=12 / scenecut=0 / intra_refresh=0 / rc=crf / mbtree=0 / crf=26.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 9 min 40 s
Bit rate mode                            : Constant
Bit rate                                 : 128 kb/s
Channel(s)                               : 6 channels
Channel layout                           : C L R Ls Rs LFE
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 8.86 MiB (11%)
Default                                  : Yes
Alternate group                          : 1

Thanks:

I used

find . -type f -name '[^.]*.mp4' -exec bash -c 'ratio=$(ffprobe -loglevel error -select_streams v:0 -show_entries stream=display_aspect_ratio -of csv=p=0 "$1"); if [[ "$ratio" == 2:1 ]]; then echo "$1"; fi' _ {} \;

It seems rtorrent created dot files.

I only go one false positive output:

mediainfo xxx.mp4
General
Complete name                            : xxx.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 613 MiB
Duration                                 : 27 min 38 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 3 099 kb/s
Encoded date                             : UTC 2013-06-12 05:00:00
Tagged date                              : UTC 2013-06-12 05:00:00
Writing application                      : Lavf53.6.0

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L3
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 27 min 38 s
Bit rate                                 : 3 000 kb/s
Width                                    : 640 pixels
Height                                   : 320 pixels
Display aspect ratio                     : 2.000
Frame rate mode                          : Constant
Frame rate                               : 24.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.610
Stream size                              : 590 MiB (96%)
Writing library                          : x264 core 116
Encoding settings                        : 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=-2 / 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=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=3000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Language                                 : English
Encoded date                             : UTC 2013-06-12 05:00:00
Tagged date                              : UTC 2013-06-12 05:00:00
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 27 min 38 s
Bit rate mode                            : Variable
Bit rate                                 : 107 kb/s
Maximum bit rate                         : 128 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 44.1 kHz
Frame rate                               : 43.066 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 21.1 MiB (3%)
Language                                 : English
Encoded date                             : UTC 2013-06-12 05:00:00
Tagged date                              : UTC 2013-06-12 05:00:00
scripts command-line video ffmpeg

1 Answers

  1. Best Answer

    There is no foolproof way based on the info you provided because there is nothing listed that is unique to a VR video.

    However, perhaps you can assume that any video with a 2:1 Display Aspect Ratio is probably VR:

    #!/bin/bash
cd "/torrents/complete" || exit
for f in *.mp4; do
ratio=$(ffprobe -loglevel error -select_streams v:0 -show_entries stream=display_aspect_ratio -of csv=p=0 "$f")
if [ "$ratio" = 2:1 ]
then
  echo "$f"
fi
done

    The above script will simply print the names of the files to be deleted. If these match properly you can change echo "$f" to rm -f "$f".

    Or a recursive version using find:

    cd "/torrents/complete"
find . -type f -name '*.mp4' -exec bash -c 'ratio=$(ffprobe -loglevel error -select_streams v:0 -show_entries stream=display_aspect_ratio -of csv=p=0 "$1"); if [[ "$ratio" == 2:1 ]]; then echo "$1"; fi' _ {} \;

    The above command will simply print the names of the files to be deleted. If these match properly you can change echo "$1" to rm -f "$1".

    • 2