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• Using ffmpeg to read mp4 file from stdin and extract image is failing with "Invalid data found when processing input"

  16 mars 2023, par jsindos

  Using ffmpeg, I'm trying to read an mp4 file from stdin, and save the last frame of the file to jpg.

  


  cat PXL_20221118_051057924.TS.mp4 | ffmpeg -sseof -3 -i - -f mp4 -update 1 -q:v 1 last.jpg


  


  The command works fine when not running from stdin.

  


  When running from stdin, an empty file is created, with the following error message :

  


  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fcb4d0041c0] stream 1, offset 0x2eaee0d: partial file
pipe:: Invalid data found when processing input


  


  I've posted the full output below.

  


  —

  


  ffmpeg version 5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 14.0.0 (clang-1400.0.29.202)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/5.1.2_5 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fcb4d0041c0] stream 2, offset 0x2c: partial file
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'pipe:':
  Metadata:
    major_brand     : isom
    minor_version   : 131072
    compatible_brands: isomiso2mp41
    creation_time   : 2022-11-18T05:11:23.000000Z
    com.android.capture.fps: 30.000000
  Duration: 00:00:23.74, start: 0.000000, bitrate: N/A
  Stream #0:0[0x1](eng): Data: none (mett / 0x7474656D), 45 kb/s (default)
    Metadata:
      creation_time   : 2022-11-18T05:11:23.000000Z
      handler_name    : MetaHandle
  Stream #0:1[0x2](eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 192 kb/s (default)
    Metadata:
      creation_time   : 2022-11-18T05:11:23.000000Z
      handler_name    : SoundHandle
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](eng): Video: hevc (Main) (hvc1 / 0x31637668), yuvj420p(pc, bt709), 1920x1080, 19524 kb/s, SAR 1:1 DAR 16:9, 30 fps, 30 tbr, 90k tbn (default)
    Metadata:
      creation_time   : 2022-11-18T05:11:23.000000Z
      handler_name    : VideoHandle
      vendor_id       : [0][0][0][0]
    Side data:
      displaymatrix: rotation of -90.00 degrees
  Stream #0:3[0x4](eng): Data: none (mett / 0x7474656D) (default)
    Metadata:
      creation_time   : 2022-11-18T05:11:23.000000Z
      handler_name    : MetaHandle
Stream mapping:
  Stream #0:2 -> #0:0 (hevc (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fcb4d0041c0] stream 1, offset 0x2eaee0d: partial file
pipe:: Invalid data found when processing input
[libx264 @ 0x7fcb4d10b500] -qscale is ignored, -crf is recommended.
[libx264 @ 0x7fcb4d10b500] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fcb4d10b500] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0x7fcb4d10b500] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/Users/josephtsindos/Downloads/last2.jpg':
  Metadata:
    major_brand     : isom
    minor_version   : 131072
    compatible_brands: isomiso2mp41
    com.android.capture.fps: 30.000000
    encoder         : Lavf59.27.100
  Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuvj420p(pc), 1080x1920, q=2-31, 30 fps, 15360 tbn (default)
    Metadata:
      creation_time   : 2022-11-18T05:11:23.000000Z
      handler_name    : VideoHandle
      vendor_id       : [0][0][0][0]
      encoder         : Lavc59.37.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
      displaymatrix: rotation of -0.00 degrees
  Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2022-11-18T05:11:23.000000Z
      handler_name    : SoundHandle
      vendor_id       : [0][0][0][0]
      encoder         : Lavc59.37.100 aac
frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[aac @ 0x7fcb4d10c840] Qavg: nan


  


• PHP FFMPEG How to calculate file size of video from bitrate and duration before conversion ?

  17 avril 2019, par Ally

  I am using php-ffmpeg (a PHP api to ffmpeg) to probe video files before they are converted. I am getting all the information I need just fine, but I want to use it to calculate the estimated file size of the video once it has been converted so that I can convert videos more efficiently for quality vs space etc.

  The post-conversion file size only has to be an estimate. So far I have tried multiplying the duration by the anticipated video bitrate plus the anticipated audio bitrate. However, that gives me a size way larger than the original video file that has a higher video and audio bitrate. I’m assuming there is a compression factor that may have to be taken into account for each different video codec, but am just trying to get somewhere with .mp4/m4v for now.

  This is what I have tried ;

  // duration | vid bitrate | aud bitrate
  
  $estimated_converted_size = $duration * ((4992 * 1024) + (128 * 1024));

  The result for a video of 24 seconds, with a video bitrate of 29302kbps and file size of 87.86 MB estimates as being 121.11 MB once converted down to 4992kbs - clearly not right !

  I’m not too clued up on the technicals of video, but is there a way of fairly accurately estimating the file size after conversion ?

• Reduce file size of ffmpeg converted video

  23 octobre 2018, par Lawrence Agulto

  I have a .mp4 video with a file size of 540kb and a duration of 30 seconds before it was converted, but when I use ffmpeg to convert it to the file size became 21mb. What options do I need to add inorder to reduce the file size to less than 1mb ?

  ffmpeg command I am using right now :

  video_filename = __DIR__.  '/uploads/VID.mp4';
  
  
  
  exec('ffmpeg -i '.$video_filename.' -c:v libx264 '.$video_filename.'');