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• how to create a radio or video "station" continuous TS stream with ffmpeg

  25 février 2020, par Zibri

  I can’t find any answer to this scenarios :

  Produce a continuous ts file that initially contains silence (or blank video), and as I add files to a text file I wish them to be queued in the output ts stream.
  Think of it as a radio or tv station.
  I found everything on how to stream anything to anything,
  but not a tv/radio broadcast like stream.

  A good start seems to be this :

  ffmpeg -re -y -nostats -nostdin -hide_banner -loglevel quiet -fflags +genpts -f concat -i list.txt -map 0:a? -map 0:v? -map 0:s? -strict -2 -dn -c copy -hls_flags delete_segments -hls_time 10 -hls_list_size 6 /var/www/html/showname_.m3u8

  list.txt example

  file '/mnt/vusolo-tv/show/Season 1/S01E01.mp4'
  
  file '/mnt/vusolo-tv/show/Season 1/S01E02.mp4'

  But i think there can be better ways...

  This is not a good answer either : From multiple video files to single output
  because "All files must have streams with identical encoding. Timebase for streams should be the same. Duration of all streams within a file should be the same, in order to maintain sync."
  And I want to be able to add arbitrary files and produce a TS stream playable by any TV (once broadcasted in dvb).

• converting from h265 to h264 10bit created audio quality issues

  13 mai 2020, par dasMetzger

  The following code was saved as a batch file and run locally in a folder that had a season worth of files that i needed converted to H.264.

  



  for %%a in ("*.*") do ffmpeg -i "%%a" -c:v libx264 -preset slow -crf 20 -c:a aac -b:a 128k "newfiles\%%~na.mp4" pause


  



  Input Video Codec : MPEG-H Part2/HEVC (H.265) (hevc)
  
Input Audio Codec : MPEG AAC Audio (mp4a)
  
Sample rate : 48000 Hz
  
Bits per sample : 32

  



  Video quality was what I expected but the audio quality declined to a tinny echo-like quality. I'm thinking my problem might be with the "-b:a 128k" but dont know audio codecs nor FFMPEG well enough (read : at all) to know how to fix or tinker.

  



  Disclaimer : reasons for converting to h.264 was due to lack of h.265 support on the raspberry pi. I have successfully converted these files since this issue occurred with Handbrake, but i want to know what might've happened with FFMPEG.

  


• NVIDIA Version Outdated Error when mine is updated

  21 février 2021, par Agent Merlot

  I'm trying to encode stuff with my NVIDIA GeForce MX150 (Driver Version : 461.09).

  


  import os
os.system(f'ffmpeg -i "Cells at Work Season 2 - Episode 07 - English Subbed.mp4" -c:a copy -c:v hevc_nvenc "07.mp4"')

  


  Whenever I'm trying to run it, I'm getting this error.

  


  [hevc_nvenc @ 0000017a8bdf7e40] Cannot load nvEncodeAPI64.dll
[hevc_nvenc @ 0000017a8bdf7e40] The minimum required Nvidia driver for nvenc is 436.15 or newer
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!

  


  What bugs me is that it says that I need 436.15 or newer, and mine is 461.09. That means it should work, right ? Can anyone help ?