On other websites (4844)

• Closed Captioned TS to Open Captioned MP4 (w/Accurate Positioning)

  19 December 2019, by Cody Greene

  I am attempting to convert closed captioned MPEG TS files to open captioned MP4s using ffmpeg.

  I am having trouble retaining the positioning of the captions.

  The closest I’ve gotten is with this simple script:

  ffmpeg -f lavfi -i movie=input.ts[out+subcc] -map 0:1 output.ass
  
  ffmpeg -i input.ts -vf "subtitles=output.ass" -c:v libx264 -pix_fmt yuv420p -b:v 8000k -c:a aac -b:a 192k target.mp4

  The result of this is the open captions are shifted FAR left and the bounding box draws black over the empty spaces left of wherever text is centered (ssa adds "/h", easily removed with sed, but then it’s left-aligned captions only)

  However, the vertical position, overall size, etc. all look great.

  Most subtitle formats force everything to the bottom center, but I’m trying to mimic the look of an open caption on the mp4 output.

  I’ve tried several formats with ccextractor and ffmpeg, but no luck. Any ideas what I’m doing wrong?

• FFMPEG on PHP could not open file

  15 July 2021, by albert

  Currently, I'm running the latest FFMPEG (4.2.1) on MacOS Catalina.
I'm trying to join multiple image to become an mp4 video using FFMPEG executed with PHP exec()

  



  here is my ffmpeg code

  



  "/usr/local/bin/ffmpeg -filter_complex \"[0]reverse[r];[0][r]concat, loop=1:50, setpts=N/12/TB\" -r 25 -f image2 -i /Users/Dan/Desktop/RAW/0234_%02d.jpg -preset fast -crf 23 -profile:v baseline -movflags +faststart -pix_fmt yuv420p /Applications/XAMPP/htdocs/render/result/result.mp4 2>&1"


  



  Here is the output of FFMPEG

  



   Array (
     [0] => ffmpeg version 4.2.1-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
     [1] =>   built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
     [2] =>   configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
     [3] =>   libavutil      56. 31.100 / 56. 31.100
     [4] =>   libavcodec     58. 54.100 / 58. 54.100
     [5] =>   libavformat    58. 29.100 / 58. 29.100
     [6] =>   libavdevice    58.  8.100 / 58.  8.100
     [7] =>   libavfilter     7. 57.100 /  7. 57.100
     [8] =>   libswscale      5.  5.100 /  5.  5.100
     [9] =>   libswresample   3.  5.100 /  3.  5.100
     [10] =>   libpostproc    55.  5.100 / 55.  5.100
     [11] => [image2 @ 0x7fe4b1000400] Could not open file : /Users/Dan/Desktop/RAW/0234_01.jpg
     [12] => [image2 @ 0x7fe4b1000400] Could not find codec parameters for stream 0 (Video: mjpeg, none(bt470bg/unknown/unknown)):
 unspecified size
     [13] => Consider increasing the value for the 'analyzeduration' and 'probesize' options
     [14] => Input #0, image2, from '/Users/Dan/Desktop/RAW/0234_%02d.jpg':
     [15] =>   Duration: 00:00:00.20, start: 0.000000, bitrate: N/A
     [16] =>     Stream #0:0: Video: mjpeg, none(bt470bg/unknown/unknown), 25 tbr, 25 tbn, 25 tbc
     [17] => Stream mapping:
     [18] =>   Stream #0:0 (mjpeg) -> reverse
     [19] =>   Stream #0:0 (mjpeg) -> concat:in0:v0
     [20] =>   setpts -> Stream #0:0 (libx264)
     [21] => Press [q] to stop, [?] for help
     [22] => [image2 @ 0x7fe4b1000400] Could not open file : /Users/Dan/Desktop/RAW/0234_01.jpg
     [23] => /Users/Dan/Desktop/RAW/0234_%02d.jpg: Input/output error
     [24] => Cannot determine format of input stream 0:0 after EOF
     [25] => Error marking filters as finished
     [26] => Conversion failed!
 )


  



  On the 11th row, ffmpeg could not open the file, although the file permission already read and write for everyone.
Is it something I missed for the ffmpeg code?

  



  Note: The ffmpeg code above can be run on terminal successfully

  


• Open letter to the European Parliament’s LIBE committee

  28 November 2019, by Joselyn Khor — Uncategorized

  An open letter to the European Parliament’s LIBE committee

  

  In an effort to stem the tide of external control over user privacy, Matomo has rallied with other like-minded companies like Protonmail, NextCloud, Tutanota and Mailfence, to advocate for pro-privacy changes to the European Commission’s “e-evidence” proposal.

  Excerpt from the letter: 

  “The Commission’s e-evidence proposal threatens the competitive advantage European tech businesses have over their American counterparts by undermining the protections we can provide to our customers. It breaks with the long-standing rule that only trusted national judicial authorities can order companies to hand over customer data for criminal investigations. Instead, the Commission’s e-evidence proposal would allow any foreign law enforcement agency from across the EU to force us to hand out customer data without our own authorities doublechecking the foreign order.

  “Different from American Big Tech firms, European privacy tech companies lack the resources to verify the legality of each foreign order. Because of the way the e-evidence proposal is phrased, we would not even be able to properly authenticate foreign authorities to ensure that we are not replying to a malicious actor – let alone object to an order if we found it to be unwarranted.”

  Matomo Founder, Matthieu Aubry emphasises, “It is time that privacy-minded tech companies work together to defend their users, their businesses, and the values they are founded on. This is why we are supporting Privacy Tech Europe.”

  Read our open letter to members of the LIBE Committee in full.