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• Using FFMPEG with PHP via shell_exec

  23 février 2018, par Peter Friedlander

  Trying to scan a directory fill of MPEG files and make framegrabs out of them using PHP.

  $e= shell_exec('find  . -regex ".*\.\(mp4\)"    -exec bash -c \'/home3/tcokchal/public_html/ffmpeg3/ffmpeg-git-20180222-64bit-static/ffmpeg -i {} -vf fps=1/8 \{}Frame55Grab%d.png\'  - {} \; 2>&1 ' );

  This only returns Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  Im trying to automate the process of a local shell script

  find . -regex ".*\.\(mp4\)"  -exec ffmpeg -i {} -vf fps=1/8 {}Frame55Grab%d.png  \;

  Which works

  Output

  ffmpeg version N-45152-ga246701e9-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18) 20170516
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libfribidi --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg
  
    libavutil      56.  7.101 / 56.  7.101
  
    libavcodec     58. 12.102 / 58. 12.102
  
    libavformat    58.  9.100 / 58.  9.100
  
    libavdevice    58.  2.100 / 58.  2.100
  
    libavfilter     7. 12.100 /  7. 12.100
  
    libswscale      5.  0.101 /  5.  0.101
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './1576498169060935.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.40.101
  
    Duration: 00:00:29.46, start: 0.000000, bitrate: 590 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 360x640, 516 kb/s, 29.93 fps, 30 tbr, 90k tbn, 60 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 64 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> png (native))
  
  Press [q] to stop, [?] for help
  
  [png @ 0x55ed2c0] ff_frame_thread_encoder_init failed
  
  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!
  
  
  
  Done.

• Discard data stream from container using ffmpeg

  10 décembre 2020, par A.Be

  I am trying to get rid of a data (subtitle) stream within a Mp4 container, using ffmpeg.

  



  Here's the screenshot from ffprobe :

  



  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.m4v':
Metadata:
major_brand     : isom
minor_version   : 2
compatible_brands: isomiso2avc1mp41
creation_time   : 2018-01-19T15:10:48.000000Z
Duration: 00:00:42.17, start: 0.000000, bitrate: 6260 kb/s
Chapter #0:0: start 0.000000, end 42.166000
Metadata:
  title           : Chapter 1
Stream #0:0(eng): Data: bin_data (text / 0x74786574), 0 kb/s (default)
Metadata:
  creation_time   : 2018-01-19T15:10:48.000000Z
  handler_name    : Apple Alias Data Handler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, 
fltp, 317 kb/s (default)
Metadata:
  creation_time   : 2018-01-19T15:10:48.000000Z
  handler_name    : AAC audio
Stream #0:2(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 
1920x1080, 5926 kb/s, 30 fps, 30 tbr, 30k tbn, 60k tbc (default)
Metadata:
  creation_time   : 2018-01-19T15:10:48.000000Z
  handler_name    : H264 video
 **Unsupported codec with id 100359 for input stream 0**


  



  I tried :

  



   ffmpeg -i test.m4v -acodec copy -vcodec copy -sn nodata.mp4


  



  Data track still there, just moved from stream 0 to stream 2

  



  I tried also :

  



   ffmpeg -i test.m4v -acodec copy -vcodec copy -map 0:1 -map 0:2 no2.mp4


  



  Same result, track still there, just jumped to stream 0:2 no luck.

  



  Any hint ?
Thanks in advance

  


• How to get rid of errors "jitter buffer full" in ffmpeg ?

  31 janvier 2021, par jidckii

  How to get rid of errors jitter buffer full ?
  
I use ffmpeg from one of the latest snapshots.
  
ffmpeg version N-90078-gf611fef Copyright (c) 2000-2018 the FFmpeg developers

  



  The problem is that from the camera on rtsp there is such a stream :
  
http://ibb.co/fmckCc
  
It is not possible to fix this from the camera side.

  



  I accept it like this :

  



  ffmpeg \
-strict experimental \
-fflags + genpts \
-fflags + latm \
-seek2any 1 \
-avoid_negative_ts + make_zero \
-max_delay 5000000 \
-rtsp_transport udp \
-i rtsp: // admin: @ 192.168.87.21: 554/0? .sdp \
-map 0 \
-r 15 \
-c: v copy \
-an \
-f mpegts udp: //239.0.0.1: 1234? ttl = 1? pkt_size = 1316


  



  I later start to get errors from time to time

  



  [rtsp @ 0x154d180] jitter buffer full
[rtsp @ 0x154d180] RTP: missed 1 packets
[rtsp @ 0x154d180] jitter buffer full
[rtsp @ 0x154d180] RTP: missed 1 packets
[rtsp @ 0x154d180] jitter buffer full
[rtsp @ 0x154d180] RTP: missed 2 packets
[rtsp @ 0x154d180] jitter buffer full
[rtsp @ 0x154d180] RTP: missed 4 packets


  



  because of this the picture crumbles.

  



  I increased the udp buffer in the linux kernel settings :

  



  net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.udp_mem = 8388608 12582912 16777216
net.ipv4.tcp_rmem = 4096 87380 8388608
net.ipv4.tcp_wmem = 4096 65536 8388608


  



  It did not solve my problem.
  
Tell me, how can you deal with such errors ?