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• Use ffmpeg to encode raw bayer_rggb8 frames as video

  5 décembre 2019, par DekiChan

  I have some industrial camera that records and outputs frames in raw bayer_rggb8 format. Frames are 1920x1080 in size, shot at 90fps. I wan’t to create video from it (format doesn’t matter much, but preferably mp4 with x264 encoding). My frames are saved on the filesystem as frame-00001.raw, frame-00002.raw etc. Every now and then there’s empty file.

  I can convert single image to say PNG with the following command :

  ffmpeg -f image2 -c:v rawvideo -pix_fmt bayer_rggb8 -s:v 1920x1080 -i frame-00400.raw output.png

  But when I try to encode it as video with the following command :

  ffmpeg -f image2 -c:v rawvideo -pix_fmt bayer_rggb8 -s:v 1920x1080 -r 90 -i frame-%05d.raw -c:v libx264 output.mp4

  I get this console output :

  Input #0, image2, from 'frame-%05d.raw':
  
    Duration: 00:00:05.26, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: rawvideo ([186]RG[8] / 0x84752BA), bayer_rggb8, 1920x1080, 90 tbr, 90 tbn, 90 tbc
  
  File 'output.mp4' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x7fe5c400a200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x7fe5c400a200] profile High 4:4:4 Predictive, level 5.1, 4:4:4 8-bit
  
  [libx264 @ 0x7fe5c400a200] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 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 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf58.29.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1920x1080, q=-1--1, 90 fps, 11520 tbn, 90 tbc
  
      Metadata:
  
        encoder         : Lavc58.54.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  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

  The file is 262bytes big, cat output.mp4 returns this :

  ftypisomisomiso2avc1mp4fremdat�moovlmvhd�@budtaZmeta!hdlrmdirappl-ilst%�toodataLavf58.29.100%

  I can’t really spot the problem. It happens both on MacOS Catalina and Ubuntu 16.04.

• ffmpeg segmentation filter don't works with strftime filename template

  24 juillet 2020, par Ksnadr Renderon

  I try to run ffmpeg with segment filter and timestamp filename template :

  


   ffmpeg -f v4l2 -framerate 30 -video_size 960x720 -i /dev/video0  -f segment  -segment_time 5  -reset_timestamps 1 -segment_format mp4 -strftime 1 out%Y-%m-%d_%H-%M-%S.mp4


  


  and i got error :

  


  Invalid segment filename template 'out%Y-%m-%d_%H-%M-%S.mp4'


  


  I have read a lot of posts and questions in the internet with the same arguments (after input, which is specific) and people says that this works. What wrong with my command ?

  


  UPD : add full ffmpeg log

  


  root@nanopiair:~# ffmpeg -f v4l2 -framerate 30 -video_size 960x720 -i /dev/video0  -f segment  -segment_time 5  -reset_timestamps 1 -segment_format mp4 -strftime 1 out%Y-%m-%d_%H-%M-%S.mp4
ffmpeg version git-2015-01-22-f86a076 Copyright (c) 2000-2014 the FFmpeg developers
  built on Jul 22 2020 12:02:39 with gcc 8 (Debian 8.3.0-6)
  configuration: --prefix=/usr --enable-nonfree --enable-gpl --enable-vdpau --enable-libx264 --enable-libv4l2 --enable-libfreetype --enable-libfontconfig --enable-libfribidi
  libavutil      54.  6.100 / 54.  6.100
  libavcodec     56.  0.101 / 56.  0.101
  libavformat    56.  2.100 / 56.  2.100
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  0.102 /  5.  0.102
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
Input #0, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, start: 2548.007454, bitrate: 248832 kb/s
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 960x720, 248832 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
[libx264 @ 0x201bec0] using cpu capabilities: ARMv6 NEON
[libx264 @ 0x201bec0] profile High, level 3.1
[libx264 @ 0x201bec0] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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=6 lookahead_threads=1 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
[mp4 @ 0x2507bd0] Invalid segment filename template 'out%Y-%m-%d_%H-%M-%S.mp4'
Output #0, segment, to 'out%Y-%m-%d_%H-%M-%S.mp4':
  Metadata:
    encoder         : Lavf56.2.100
    Stream #0:0: Video: h264 (libx264), yuv420p, 960x720, q=-1--1, 30 fps, 30 tbn, 30 tbc
    Metadata:
      encoder         : Lavc56.0.101 libx264
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument


  


• How to embed an MP4 inside a PDF ?

  19 août 2020, par malat

  I am a happy user of img2pdf. This tool does the minimal amount of work to put a series of JPEG 2000/JPEG/PNG images into a PDF "enveloppe". However I am now faced with a new challenge : embed a MP4 file into a PDF "enveloppe".

  


  I see that commercial tool can do it, as seen at :

  


  

  • Add audio, video, and interactive objects to PDFs

  


  


  Here is one such sample PDF file (no Flash required on windows in this sample) :

  


  

  • https://gitlab.com/agrahn/media9/-/issues/9#note_345903962
** https://gitlab.com/agrahn/media9/uploads/90fddd777e0ec514c39c924cd8d3b688/video_test.pdf

  


  


  It seems to have been introduced in ISO 32000-1 (PDF 1.7 Extension Level 5)

  


  I am looking for a solution which will use the Rich Media annotation inside the PDF stream.

  


  There are dozen of duplicated questions on superuser/stackoverflow, which all pretty much refer to imagemagick/convert command line tool. But in my case, convert expand the images into a multi-page PDF (which is not my desired behavior) :

  


  $ convert input.mp4 output.pdf
$ pdfinfo output.pdf 
Title:          out
Producer:       https://imagemagick.org
CreationDate:   Wed Aug 19 15:38:01 2020 CEST
ModDate:        Wed Aug 19 15:38:01 2020 CEST
Tagged:         no
UserProperties: no
Suspects:       no
Form:           none
JavaScript:     no
Pages:          1601
Encrypted:      no
Page size:      352 x 288 pts
Page rot:       0
File size:      534407296 bytes
Optimized:      no
PDF version:    1.3


  


  with :

  


  $ convert --version
Version: ImageMagick 6.9.10-23 Q16 x86_64 20190101 https://imagemagick.org
Copyright: © 1999-2019 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP 
Delegates (built-in): bzlib djvu fftw fontconfig freetype jbig jng jpeg lcms lqr ltdl lzma openexr pangocairo png tiff webp wmf x xml zlib


  


  and

  


  $ file input.mp4 
input.mp4: ISO Media, MP4 Base Media v1 [IS0 14496-12:2003]
$ ffprobe -v quiet -print_format json  -show_streams input.mp4 | grep codec_long_name
            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",