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• Can FFmpeg crop gif image under 1 second ?

  5 septembre 2021, par jeongbalmountain

  I am developing an iOS application about gif.

  


  But I have a problem with gif cropping. Cropping gif spends so many times with FFmpeg.

  


  (updated code)

  


  These are the ffmpeg codes I've tried.

  


  cropped images -> gif

  


  ffmpeg -f image2 -i %d.jpg -vf 'scale=450:-1' output.gif


  


  using concat command (cropped images -> gif)

  


  ffmpeg -f concat -i tmp.txt output.gif


  


  using crop filter

  


  ffmpeg -i in.gif -filter:v "crop=out_w:out_h:x:y" out.gif


  


  These codes are so slow when converting images to gif
or gif to cropped gif.

  


  Is there a way to reduce the time to crop gif less than 1 second ?

  


  (updated2)
ffmpeg -i in.gif -filter:v "crop=out_w:out_h:x:y" out.gif

  


  


  ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
  
built with Apple clang version 12.0.5 (clang-1205.0.22.9)
  
configuration : —prefix=/usr/local/Cellar/ffmpeg/4.4_2 —enable-shared

  


  


  


  —enable-pthreads —enable-version3 —cc=clang —host-cflags= —host-ldflags= —enable-ffplay —enable-gnutls —enable-gpl —enable-libaom —enable-libbluray —enable-libdav1d —enable-libmp3lame —enable-libopus —enable-librav1e —enable-librubberband —enable-libsnappy —enable-libsrt —enable-libtesseract —enable-libtheora —enable-libvidstab —enable-libvorbis —enable-libvpx —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libxvid —enable-lzma —enable-libfontconfig —enable-libfreetype —enable-frei0r —enable-libass —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libspeex —enable-libsoxr —enable-libzmq —enable-libzimg —disable-libjack —disable-indev=jack —enable-avresample —enable-videotoolbox libavutil 56. 70.100 / 56. 70.100 libavcodec 58.134.100 /
58.134.100 libavformat 58. 76.100 / 58. 76.100 libavdevice 58. 13.100 / 58. 13.100 libavfilter 7.110.100 / 7.110.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 9.100 /
5. 9.100 libswresample 3. 9.100 / 3. 9.100 libpostproc 55. 9.100 / 55. 9.100 Input #0, gif, from './test.gif' : Duration : 00:00:18.27, start : 0.000000, bitrate : 70098 kb/s Stream #0:0 :
Video : gif, bgra, 1080x1920, 15 fps, 14.99 tbr, 100 tbn, 100 tbc
Stream mapping : Stream #0:0 -> #0:0 (gif (native) -> gif (native))
Press [q] to stop, [?] for help Output #0, gif, to './crop.gif' :
  
Metadata :
encoder : Lavf58.76.100 Stream #0:0 : Video : gif, bgr8(pc, progressive), 1080x1198, q=2-31, 200 kb/s, 14.99 fps, 100 tbn
Metadata :
encoder : Lavc58.134.100 gif frame= 1 fps=0.0 q=-0.0 size= 0kB time=00:00:00.01 bitrate= 0.0kbits/s speed=5e+03x

  


  


  


  frame= 11 fps=0.0 q=-0.0 size= 4096kB time=00:00:00.68
bitrate=49344.8kbits/s speed=1.31x frame= 22 fps= 21 q=-0.0
size= 8192kB time=00:00:01.41 bitrate=47594.9kbits/s speed=1.32x
  
frame= 32 fps= 20 q=-0.0 size= 12288kB time=00:00:02.08
bitrate=48395.8kbits/s speed=1.32x frame= 43 fps= 20 q=-0.0
size= 16384kB time=00:00:02.81 bitrate=47764.3kbits/s speed=1.33x
  
frame= 54 fps= 20 q=-0.0 size= 20992kB time=00:00:03.55
bitrate=48441.3kbits/s speed=1.33x frame= 65 fps= 20 q=-0.0
size= 24832kB time=00:00:04.28 bitrate=47528.9kbits/s speed=1.35x
  
frame= 77 fps= 21 q=-0.0 size= 28928kB time=00:00:05.08
bitrate=46649.2kbits/s speed=1.36x frame= 87 fps= 21 q=-0.0
size= 32768kB time=00:00:05.75 bitrate=46684.4kbits/s speed=1.36x
  
frame= 98 fps= 21 q=-0.0 size= 36608kB time=00:00:06.48
bitrate=46279.7kbits/s speed=1.36x frame= 109 fps= 21 q=-0.0
size= 40704kB time=00:00:07.22 bitrate=46183.8kbits/s speed=1.37x
  
frame= 120 fps= 21 q=-0.0 size= 44800kB time=00:00:07.95
bitrate=46163.7kbits/s speed=1.37x frame= 131 fps= 21 q=-0.0
size= 49152kB time=00:00:08.69 bitrate=46335.2kbits/s speed=1.38x
  
frame= 142 fps= 21 q=-0.0 size= 53504kB time=00:00:09.42
bitrate=46529.2kbits/s speed=1.37x frame= 153 fps= 21 q=-0.0
size= 57344kB time=00:00:10.15 bitrate=46282.0kbits/s speed=1.38x
  
frame= 164 fps= 21 q=-0.0 size= 61184kB time=00:00:10.89
bitrate=46025.6kbits/s speed=1.38x frame= 174 fps= 21 q=-0.0
size= 65280kB time=00:00:11.55 bitrate=46300.8kbits/s speed=1.37x
  
frame= 185 fps= 21 q=-0.0 size= 69376kB time=00:00:12.29
bitrate=46243.1kbits/s speed=1.38x frame= 196 fps= 21 q=-0.0
size= 72960kB time=00:00:13.02 bitrate=45905.4kbits/s speed=1.38x
  
frame= 207 fps= 21 q=-0.0 size= 76544kB time=00:00:13.76
bitrate=45570.4kbits/s speed=1.38x frame= 218 fps= 21 q=-0.0
size= 80640kB time=00:00:14.49 bitrate=45590.3kbits/s speed=1.38x
  
frame= 229 fps= 21 q=-0.0 size= 84224kB time=00:00:15.23
bitrate=45302.9kbits/s speed=1.39x frame= 240 fps= 21 q=-0.0
size= 88064kB time=00:00:15.96 bitrate=45201.8kbits/s speed=1.39x
  
frame= 250 fps= 21 q=-0.0 size= 91648kB time=00:00:16.63
bitrate=45146.1kbits/s speed=1.39x frame= 261 fps= 21 q=-0.0
size= 96000kB time=00:00:17.36 bitrate=45301.4kbits/s speed=1.38x
  
frame= 271 fps= 21 q=-0.0 size= 99840kB time=00:00:18.03
bitrate=45362.7kbits/s speed=1.38x frame= 274 fps= 21 q=-0.0
Lsize= 101552kB time=00:00:18.23 bitrate=45634.2kbits/s speed=1.37x
  
video:101552kB audio:0kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead : 0.000019%

  


  


  it takes 12 seconds

  


• Spaces in FFMPEG Input Thwart Execution

  2 septembre 2021, par Woolwit

  What's so baffling, is why spaces in the audio input seem to work fine, but spaces in the video input break things.
This fetches random images from a directory, pairs them with random audio clips and joins them into an mp4 video.

  


  def makeAudioImgMovs():
    randImgs = getImgs()
    compAudClips = makeAudioClips()
    audioJpgs = dict(zip(randImgs,compAudClips)) #Heres where we join the completed audio clips and the jpgs into a dict
    for jpg, aud in audioJpgs.items():
        print(f'The img is {jpg}, the type of the img is {type(jpg)} the aud is {aud} the type of the aud is {type(aud)}')
        subprocess.call('ffmpeg -hide_banner -loglevel error -loop 1 -i "{0}" -i "{1}"\
        -filter:v \
        "fade=in:st=0:d=1, fade=out:st=10:d=1,scale=720:480:force_original_aspect_ratio=decrease,pad=720:480:(ow-iw)/2:(oh-ih)/2,setsar=1" \
         -filter:a "afade=in:st=0:d=1, afade=out:st=10:d=1" \
        -c:v libx264 -t 11 -pix_fmt yuv420p -preset faster -shortest -c:a aac {2}.mp4'.format(jpg,aud,timePath/(pathlib.Path(jpg).stem)),shell=True)
makeAudioImgMovs()


  


  The print statement is writing what is in the dict of audioJpgs list. For example...

  


  The img is 2021-09-02-1-40/ponty_me.jpg, the type of the img is the aud is 2021-09-02-1-40/Jms Brn like it is like it was.aiff the type of the aud is

  


  The img is 2021-09-02-1-40/1966taxiToMassFromMomBack 2.tiff, the type of the img is the aud is 2021-09-02-1-40/Lola_Fay.mp3 the type of the aud is

  


  [NULL @ 0x7fe503021400] Unable to find a suitable output format for '2021-09-02-1-40/1966taxiToMassFromMomBack'
2021-09-02-1-40/1966taxiToMassFromMomBack : Invalid argument

  


  The img is 2021-09-02-1-40/1966taxiToMassFromMomBack 5.tiff, the type of the img is the aud is 2021-09-02-1-40/M Miller Lonnie's Lament.aiff the type of the aud is

  


  [NULL @ 0x7fd32a854c00] Unable to find a suitable output format for '2021-09-02-1-40/1966taxiToMassFromMomBack'
2021-09-02-1-40/1966taxiToMassFromMomBack : Invalid argument

  


  The img is 2021-09-02-1-40/10_021390_danny ? 1_jpg.jpg, the type of the img is the aud is 2021-09-02-1-40/i_got_to_rock.mp3 the type of the aud is

  


  [NULL @ 0x7f8449835800] Unable to find a suitable output format for '2021-09-02-1-40/10_021390_danny ?'
2021-09-02-1-40/10_021390_danny ? : Invalid argument

  


  The img is 2021-09-02-1-40/11_021390_danny_2_jpg.jpg, the type of the img is the aud is 2021-09-02-1-40/M Miller Power.aiff the type of the aud is

  


  The last pair of img/aud complete fine and write an mp4. Notice there, that the audio file has spaces in it !
Notice that the errors 'Invalid argument' get thrown where there is a space in the jpg file name.

  


  Help greatly appreciated.

  


• ffmpeg - Convert files but keep Same Date Modification as Original ?

  9 septembre 2021, par user5894146

  So I want to start with that ffmpeg and powershell isn't really my strength but I have been using the following powershell command to convert every .flac file in a certain directory to a 320K file.

  


  dir *.flac | foreach {ffmpeg -i $_.FullName -c:v copy  -b:a 320k  $_.FullName.Replace('flac', 'mp3')}


  


  This works exactly how I want to without any album art being transcoded but I want to incorporate a way so that the new .mp3 files that are created have the SAME DATE MODIFICATION value of the .flac files. Is something like this even possible ?

  


  audio_ex.flac = Date Modification: 1/1/2010
audio_ex.mp3 = Date Modification: 9/8/2021


  


  should be instead

  


  audio_ex.flac = Date Modification: 1/1/2010
audio_ex.mp3 = Date Modification: 1/1/2010


  


  I have a folder of 6K files and want each original date modified to match the newly created files so if I can do the above command and also have the date mod time match within one execution, that would be ideal.

  


  I thought of manually changing each files mod time using 3rd party tools but it will be too time consuming.