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• pyglet's video example application not working

  3 octobre 2020, par C. E.

  I'm trying to get the pyglet video player example to work, but I'm getting the following error :

  


  


  pyglet.media.codecs.ffmpeg.FFmpegException : avformat_open_input in
ffmpeg_open_filename returned an error opening file
/home/ce/Downloads/sample-mp4-file.mp4 Error code : -1094995529

  


  


  I decoded this number, and it turns out that it corresponds to the "INDA" error code in FFMPEG's error.h, which means

  


  


  Invalid data found when processing input

  


  


  The example video that I used can be downloaded here. I tried the mp4 one, the avi one and the webm one. I also tried other files that I have locally. They all work in other video players, and in fact some were created using FFMPEG.

  


  Finally, I used pyglet.media.have_ffmpeg() to make sure that pyglet agrees with me that I have ffmpeg installed.

  


  Originally, I had ffmpeg 3.4 installed globally, i.e. which ffmpeg pointed to a 3.4 binary. I then replaced that binary with a ffmpeg 4.1 binary. However, when I run pyglet.info.dump_ffmpeg() it still say 3.4.8 so I may not have suceeded in trying 4.1. I tried setting os.environ["LD_LIBRARY_PATH"] but it is still printing 3.4.8.

  


  Operating system : Ubuntu 18.04. I have gotten it to work on Ubuntu 20.04. It uses a newer FFMPEG which I suspect is important.

  


  What can I do ?

  


• Is it safe to ignore the error "Invalid UTF-8 in decoded subtitles text ; maybe missing -sub_charenc option Error while decoding stream" ?

  30 avril 2022, par Clogged-artery

  I was encoding a video with subtitles and I got the error, "Invalid UTF-8 in decoded subtitles text ; maybe missing -sub_charenc option. Error while decoding stream" but the video encoded anyway. What are the consequences of ignoring this error ? A google search showed a result of one guy saying it skips that sub so the resulting video will have missing subs. Can someone confirm this ?

  


  I know how to fix it but I have already converted 50+ videos with subtitles and I'm fairly certain that a few of them had this error. I just want someone to tell me that it's okay to ignore so I don't have to watch 200 hours of videos.

  


  Solution for fixing subtitle errors :

  


  Create a batch file and edit with the following :

  


  for %%a in ("*.srt") do ffmpeg -v 9 -loglevel 99 -sub_charenc CP1252 -i "%%a" "newfiles\%%~na.srt"
pause


  


• Wanted : ffmpeg expert to help me with an encoding problem (paid job)

  22 août 2022, par Michael Heuberger

  Good day,

  


  I'm the developer of www.videomail.io and experience issues with audio. It's a heavily used, free service to enable Deaf people to email in Sign Language. Runs on ffmpeg (under node-fluent-ffmpeg) and JavaScript (Node.js).

  


  Since I am Deaf myself, I am unable to repair some audio-related issues while muxing video with audio together on server side via ffmpeg. Reason for adding audio is to expand the target audience.

  


  That said, I'm searching for someone to help me with this. It's a paid job !

  


  Requirements :

  


  

  • Must know ffmpeg very well, especially on how to encode audio (WAV) and video (MP4) together without any audio delays.

  


  • Knowing JavaScript would be a massive plus for writing code

  


  • Has time in the following weeks, I guess about 10 hours or so.

  


  


  If you are keen, ping me please. My page is www.binarykitchen.com - thanks !