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• FFMPEG - filter_complex lut file path giving problems on Windows

  1er novembre 2019, par Taapo

  I’m applying a 3D to a Prores file - and when placed in the same directory as where I execute the ffmpeg command - all is working fine (multiline format for readability) :

  ffmpeg.exe -loglevel warning -i "E:\path\P1200226.MOV" 
  
  -i "c:\path\watermark.png" -filter_complex 
  
  "[0:v]scale="1280x720", 
  
  overlay=W-w-5:H-h-5/2, 
  
  lut3d=file=VLog_to_V709_forV35_ver100.cube,
  
  format=pix_fmts=yuv420p" 
  
  -codec:a copy -codec:v prores -profile:v 0 

  But when I try to set a drive and pathname for the Lut file, things go wrong. I tried several formats :

  lut3d=file=c:\path\VLog_to_V709_forV35_ver100.cube,
  
  lut3d=file="c:\path\VLog_to_V709_forV35_ver100.cube",
  
  lut3d=file='c:\path\VLog_to_V709_forV35_ver100.cube',
  
  lut3d=file=""c:\path\VLog_to_V709_forV35_ver100.cube"",
  
  lut3d=file="c:\\path\\VLog_to_V709_forV35_ver100.cube",

  But none of them work. I get the following error :

  [lut3d @ 0000021191ac0380] [Eval @ 000000bde47fe820] Undefined constant or missing '(' in 'pathVLog_to_V709_forV35_ver100.cube'
  
  [lut3d @ 0000021191ac0380] Unable to parse option value "pathVLog_to_V709_forV35_ver100.cube"
  
  [lut3d @ 0000021191ac0380] [Eval @ 000000bde47fe830] Undefined constant or missing '(' in 'pathVLog_to_V709_forV35_ver100.cube'
  
  [lut3d @ 0000021191ac0380] Unable to parse option value "pathVLog_to_V709_forV35_ver100.cube"
  
  [lut3d @ 0000021191ac0380] Error setting option interp to value pathVLog_to_V709_forV35_ver100.cube.
  
  [Parsed_lut3d_2 @ 0000021191ac0280] Error applying options to the filter.
  
  [AVFilterGraph @ 000002118e5751c0] Error initializing filter 'lut3d' with args 'file=c:pathVLog_to_V709_forV35_ver100.cube'
  
  Error initializing complex filters.
  
  Invalid argument

  How do I form a correct path on Windows, so this can work ?

• Does FFmpeg video filter(eq filter) color correction work same as function sws_setColorspaceDetails ?

  25 octobre 2019, par Jahwan Oh

  I’m need to use color filter with two different implementation.
  first one is using the function below. with conversion

  double m_brightness = -0.18;
  
  double m_contrast = 1.45;
  
  double m_saturation = 1.2;
  
  SwsContext *swsctx = sws_getCachedContext(NULL, vStreams[1]->codec->width, vStreams[1]->codec->height, vStreams[1]->codec->pix_fmt, dst_width, dst_height, dst_pix_fmt, SWS_BICUBIC, NULL, NULL, NULL);
  
      int *inv_table, srcrange, *table, dstrange, b, c, s;
  
      sws_getColorspaceDetails(swsctx, &inv_table, &srcrange, &table, &dstrange, &b, &c, &s);
  
      b = int((1 << 16) * m_brightness);
  
      c = int(c * m_contrast);
  
      s = int(s * m_saturation);
  
      ret = sws_setColorspaceDetails(swsctx, table, srcrange, inv_table, dstrange, b, c, s);

  and the other one is using FFmpeg -vf eq color correction on command line.

  ffmpeg -i original.jpg -vf "eq=brightness=-0.18:contrast=1.45:saturation=1.2" -c:a copy original_filter.jpg

  the problem is that I need to have a same result(filtered) with this two tools. with just same brightness/contrast/saturation parameters, it showed different result, so I tried to convert these parameter between these two tools.

  I thought these two color correction work same reading the link below. I’ve tried to convert the swscale filter parameter to ffmpeg -vf eq filter parameter based on the link, but it seems it is not a conversion between them.
  but, it is more like a conversion of m_brightness <—> b.(in the code I’ve attached)
  https://github.com/google/sagetv/blob/71d122229105e164cd410fafed2a5e7483869913/third_party/mplayer/libmpcodecs/vf_scale.c#L393

  you can see the each results with different parameter.

  https://drive.google.com/drive/folders/181_LhkvpB4XbEf05_ecuLoy5nSSEcRiX?usp=sharing

  How can I convert the parameters so that it produce same filtered result ? or is it totally different algorithm ?

• How to download video streaming powered by JW Player 8.4.2 + iframe src from hydrax.net combined ? [on hold]

  20 octobre 2019, par Tév

  I find that downloading a video that streamed via JW Player 8.4.2. which using hydrax.net as the media source is really annoying & frustrating because I’ve done my best with the all solution I’ve found comes to nothing.

  Is there any solution left I can try ?

  I’m trying to download video from http://javmile.com/dvd/anna-marie-patsukin-channel-z-vol/39585 with ffmpeg & youtube-dl but not worked.

  I tried to stream/convert the .m3u8 file I managed to download with VLC but still not worked.

  I also tried to look for the alternative from Inspect -> Network -> Media and all that I got is a blob link that ends dead end. Inspect -> Application also doesn’t provide any solution since there’s no Video frame.

  Last but not least, I’ve tried the Video DownloadHelper extension from Firefox trick to download the video from the referrer/url link but it’s failed too.

  ---

  The referrer link I’ve got from the Video DownloadHelper Firefox’s extension :

  https://hydrax.net/watch?v=5b9ff9a0f032b

  ---

  The url link I’ve got from the Video DownloadHelper Firefox’s extension :

  https://www.googleapis.com/drive/v3/files/1nJ5512Z8I0t9go8pQQE9xVLnO03WCzai?alt=media&key=AIzaSyDAFci7RjYNlmLG8txIQJCYFrfApf21Ulc

  ---

  The blob link that’ll lead me to the .m3u8 file download :

  blob :https://hydrax.net/e9166d00-1aba-4832-b7bf-8cb011abcc10

  ---

  And here the .m3u8 file content I’ve managed to download :

  EXTM3U
  EXT-X-VERSION:3
  EXT-X-STREAM-INF:BANDWIDTH=394000,RESOLUTION=480x360
  blob :https://hydrax.net/acaacae5-2ad3-4447-9aab-cbabe2a1e5ee#VzWiWxKoXzlaWQpyuPfhdPjzQsCR8zJFWzrcgqTL1MkLQQlWKgjJKMV6Xzs
  EXT-X-STREAM-INF:BANDWIDTH=1998000,RESOLUTION=1280x720
  blob :https://hydrax.net/710d4b51-9334-469d-9146-8af650529982#VzWiWxKoXzBaWfrjQfFFg8gi1L06u40fJsf5QzVkKSrLJrfht5Bk84lRXzs
  EXT-X-STREAM-INF:BANDWIDTH=2998000,RESOLUTION=1920x1080
  blob :https://hydrax.net/1130dfbe-dab1-402e-9309-5d562c68424b#VzWiWxKoXzfaW8pl1r0H8LJAVPFWOsffV41hCgZeBPV7K5fJfrBpQf0DXzI

  ---

  Command that I used to download the video with the ffmpeg :

  ffmpeg -i [neither of referrer/url link from DownloadHelper nor blob link from the .m3u8 file content worked] -vcodec copy -acodec copy MyOutput.mp4

  ---

  Command that I used to download the video with the youtube-dl :

  youtube-dl -i [neither of referrer/url link from DownloadHelper nor blob link from the .m3u8 file content worked] -vcodec copy -acodec copy MyOutput.mp4