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• Bulk Conversion Of Kubuntu Master Video Folder Using FFmpeg ?

  12 janvier 2019, par Sarah Szabo

  I have an old archive of videos (Around 400GB/1024 files) that are heavily structured due to the program that created them at the time.

  There is a single folder called master that contains many other folders for specific events that were recorded. I was thinking of using for i in *.vob; do ffmpeg -i "$i" "${i%.*}.mp4"; done (From another SO user’s answer on another question), but this is insufficient since the .vob files aren’t all in the master folder are are instead in different folders in master.

  Furthermore, the .vob titles are nonsense (And even worse overlapping ! Video 1 (In Folder 1), Video 1 (In Folder 2) so they can’t all be named the same thing in the same folder if I joined all of them.

  My question is can I do a tree traversal of master using a script (I’m running KDE) that takes each .vob files and converts it using somthing similar to for i in *.vob; do ffmpeg -i "$i" "${i%.*}.mp4"; done in master, but with the name of the folder instead of the name of the file ?

  So, if we were in the Assault On The Control Room folder and converted Video 1 and Video 2, could this output Assault On The Control Room 1 and Assault On The Control Room 2 and move the converted file to /somefilepath/master2 that contains all the converted files ?

  The labels would obviously be set using ffmpeg and a for loop, but my scripting skills aren’t up to this task yet.

  EDIT 0 : Output of shopt -s globstar; for v1 in **/*.vob; do v2=$(awk -F'/' '{print "/somefilepath/master2/" $(NF-1) " - " $NF ".mp4"}' <<< "$v1"); ffmpeg -i "$v1" "$v2"; done

  sarah@ConvergentRefuge:/media/sarah/SENTINEL/Master$ shopt -s globstar; for v1 in **/*.vob; do v2=$(awk -F'/' '{print "/media/sarah/SENTINEL/Videos/NewMaster" $(NF-1) " - " $NF ".mp4"}' <<< "$v1"); ffmpeg -i "$v1" "$v2"; done
 ffmpeg version N-91290-g6129b13 Copyright (c) 2000-2018 the FFmpeg developers
   built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
   configuration: --prefix=/home/sarah/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/sarah/ffmpeg_build/include --extra-ldflags=-L/home/sarah/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/sarah/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
   libavutil      56. 18.102 / 56. 18.102
   libavcodec     58. 20.102 / 58. 20.102
   libavformat    58. 17.100 / 58. 17.100<br />
   libavdevice    58.  4.101 / 58.  4.101<br />
   libavfilter     7. 25.100 /  7. 25.100<br />
   libswscale      5.  2.100 /  5.  2.100<br />
   libswresample   3.  2.100 /  3.  2.100
   libpostproc    55.  2.100 / 55.  2.100
 **/*.vob: No such file or directory
 

  EDIT 1 : View of Master Folder
  

• Why would I receive input/output error with testsrc ffmpeg ?

  5 mars 2021, par Dave Stein

  I am trying to write an integration test which requires actually RTMP streaming to a 3rd party service. How to generate an RTMP test stream using ffmpeg command ? seems like the right answer, however I can't get it to work.

  



  As a baseline, without RTMP, ffmpeg -f lavfi -i testsrc -t 30 -pix_fmt yuv420p test.mp4 works.

  



  ffmpeg -f lavfi -i testsrc -t 30 -pix_fmt yuv420p -f flv rtmp://mylocation gives me the error rtmp://mylocation: Input/output error

  



  I should note that the URL is valid, otherwise I get an error saying it can't open a connection.

  



  I also tried ffmpeg -f lavfi -i testsrc -pix_fmt yuv420p -f flv rtmp://mylocatiom. I had read that if you don't supply time, it goes on forever and thought I might need that for an RTMP stream. I got the same error.

  



  Here is full output from last attempt, with added params as suggested by @Gyan below, along with verbose logging.

  



  ffmpeg -loglevel verbose -f lavfi -i testsrc -pix_fmt yuv420p -f flv -c:v libx264 -g 50 rtmp://myhost:1935/identifier
ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
  built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
[Parsed_testsrc_0 @ 0x7fddf34022c0] size:320x240 rate:25/1 duration:-1.000000 sar:1/1
Input #0, lavfi, from 'testsrc':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: rawvideo, 1 reference frame (RGB[24] / 0x18424752), rgb24, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
[tcp @ 0x7fddf3404880] Starting connection attempt to {theIP} port 1935
[tcp @ 0x7fddf3404880] Successfully connected to {theIP} port 1935
rtmp://myhost:1935/identifier: Input/output error


  



  Updating to debug added some more data like this before error :

  



  [tcp @ 0x7fc4e1601a00] Starting connection attempt to 34.224.30.155 port 1935
[tcp @ 0x7fc4e1601a00] Successfully connected to 34.224.30.155 port 1935
[rtmp @ 0x7fc4e1411200] Handshaking...
[rtmp @ 0x7fc4e1411200] Type answer 3
[rtmp @ 0x7fc4e1411200] Server version 3.0.1.1
[rtmp @ 0x7fc4e1411200] Proto = rtmp, path = /identifier, app = identifier, fname = 
[rtmp @ 0x7fc4e1411200] Window acknowledgement size = 2500000
[rtmp @ 0x7fc4e1411200] Max sent, unacked = 2500000
[rtmp @ 0x7fc4e1411200] New incoming chunk size = 4096
[rtmp @ 0x7fc4e1411200] Releasing stream...
[rtmp @ 0x7fc4e1411200] FCPublish stream...
[rtmp @ 0x7fc4e1411200] Creating stream...
[rtmp @ 0x7fc4e1411200] Sending publish command for ''
rtmp://myhost:1935/identifier: Input/output error


  



  Sending publish command for '' is suspect, but not sure what to do about that.

  


• ffmpeg for android, out of memory on decoding rotate mp4 file with openh264

  29 octobre 2018, par da que

  Version

  • ffmpeg : 4.0.2
  • openh264 : 1.8.0

  Problem

  I try to trim a .mp4 file which metadata info contains rotate info, but I failed with the error information.

  The file stream info :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2018-10-09T09:40:53.000000Z
  
      location        : +39.8983+116.4145/
  
      location-eng    : +39.8983+116.4145/
  
      com.android.version: 6.0
  
    Duration: 00:00:10.56, start: 0.000000, bitrate: 8671 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 8563 kb/s, SAR 1:1 DAR 16:9, 30.01 fps, 30 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
        rotate          : 180
  
        creation_time   : 2018-10-09T09:40:53.000000Z
  
        handler_name    : VideoHandle
  
      Side data:
  
        displaymatrix: rotation of -180.00 degrees
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-10-09T09:40:53.000000Z
  
        handler_name    : SoundHandle

  ffmpeg cmd

  ffmpeg -y -i 1.mp4 -threads 4 -b:v 2000k -vcodec libopenh264 -acodec copy -ss 0 -t 3 -f mp4 -movflags faststart -strict -2 ./output.mp4

  result

  Error reinitializing filters!
  
  Failed to inject frame into filter network: Out of memory
  
  Error while processing the decoded data for stream #0:0

  Then I found this answer : ffmpeg-for-android-out-of-memory, after i added -noautorotate command to my cmd, the video is trimmed successful.

  If I use -vcodec copy instead of -vcodec libopenh264, the result also is ok, I wonder if there is a bug when libopenh264 decode with ffmpeg’s autorotate function.

  I wipe the video’s rotate info from metadata with -metadata:s:v:0 command, the newly video can be trimmed successful with the origin cmd :(