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• Convert set of PNGs into rawvideo .raw FFMPEG

  13 août 2020, par Wire

  Recently, I have been trying to modify the boot animation of a little robot. It is a .raw file and it contains every RGB565 frame one after the other. I have been able to get all of the frames using

  


  ffmpeg -f rawvideo  -pixel_format rgb565 -video_size 184x96 -framerate 10 -i "boot_anim.raw" -r 1/1 boot_anim%02d.png

  


  But if I try to repack it with

  


  ffmpeg -i boot_anim%02d.png -f rawvideo -pix_fmt rgb565 -framerate 10 -video_size 184x96 -r 1/1 "boot_anim.raw"

  


  it only puts in the first two frames and nothing else. I have also tried libx264 and putting in vcodecs manually. Same result. I'm new to ffmpeg and Linux overall.

  


  Here is the full output :

  


  ffmpeg version N-98716-gb40dd2f Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --enable-encoder=png --enable-decoder=png
  libavutil      56. 58.100 / 56. 58.100
  libavcodec     58.100.100 / 58.100.100
  libavformat    58. 50.100 / 58. 50.100
  libavdevice    58. 11.101 / 58. 11.101
  libavfilter     7. 87.100 /  7. 87.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
Input #0, image2, from 'boot_anim%02d.png':
  Duration: 00:00:00.44, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: png, rgba(pc), 184x96, 25 fps, 25 tbr, 25 tbn, 25 tbc
File 'boot_anim.raw' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (png (native) -> rawvideo (native))
Press [q] to stop, [?] for help
[swscaler @ 0x556d6993d940] full chroma interpolation for destination format 'rgb565le' not yet implemented
Output #0, rawvideo, to 'boot_anim.raw':
  Metadata:
    encoder         : Lavf58.50.100
    Stream #0:0: Video: rawvideo (RGB[16] / 0x10424752), rgb565le, 184x96, q=2-31, 282 kb/s, 1 fps, 1 tbn, 1 tbc
    Metadata:
      encoder         : Lavc58.100.100 rawvideo
frame=    2 fps=0.0 q=-0.0 Lsize=      69kB time=00:00:02.00 bitrate= 282.6kbits/s dup=0 drop=9 speed= 871x    
video:69kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%


  


  Any help appreciated !

  


• FFmpeg weird codec id for wav_pcm

  1er février 2021, par phongelegob

  So, I want to convert a lot of 32 bit .wav files into 24 bit .wav ones because i want to import them into Omnisphere, a virtual synth. I tried to convert them all with FFmpeg but Omnisphere doesn't support them. I then tested some things and Omnisphere seems to support the audio exported from Edison, which is FL Studio audio editing and recording tool. As I don't want to export them all individually, i wanted to know if there's any way to fix this in FFmpeg or in another audio converter. Here are the test files and what they output in MediaInfo : https://www.mediafire.com/file/l6lojwswsaq9fly/audiotest+wav.zip/file
32 bit original file :

  


  General
Complete name                            : /home/user/Documents/audiotest wav/32bit.wav
Format                                   : Wave
File size                                : 905 KiB
Duration                                 : 2 s 625 ms
Overall bit rate mode                    : Constant
Overall bit rate                         : 2 823 kb/s
Writing application                      : Edison
Comment                                  : Recorded on 1/26/2020 in Edison.

Audio
Format                                   : PCM
Format profile                           : Float
Codec ID                                 : 3
Codec ID/Hint                            : IEEE 
Duration                                 : 2 s 625 ms
Bit rate mode                            : Constant
Bit rate                                 : 2 822 kb/s
Channel(s)                               : 2 channels
Sampling rate                            : 44.1 kHz
Bit depth                                : 32 bits
Stream size                              : 904 KiB (100%)


  


  24 bit file exported from Edison :

  


  General
Complete name                            : /home/user/Documents/audiotest wav/edison.wav
Format                                   : Wave
File size                                : 679 KiB
Duration                                 : 2 s 625 ms
Overall bit rate mode                    : Constant
Overall bit rate                         : 2 118 kb/s
Writing application                      : Edison
Comment                                  : Recorded on 1/26/2020 in Edison.

Audio
Format                                   : PCM
Format settings                          : Little / Signed
Codec ID                                 : 1
Duration                                 : 2 s 625 ms
Bit rate mode                            : Constant
Bit rate                                 : 2 117 kb/s
Channel(s)                               : 2 channels
Sampling rate                            : 44.1 kHz
Bit depth                                : 24 bits
Stream size                              : 678 KiB (100%)


  


  24 bit file converted with FFmpeg :

  


  General
Complete name                            : /home/user/Documents/audiotest wav/ffmpeg.wav
Format                                   : Wave
File size                                : 679 KiB
Duration                                 : 2 s 625 ms
Overall bit rate mode                    : Constant
Overall bit rate                         : 2 117 kb/s
Writing application                      : Lavf58.50.100
Comment                                  : Recorded on 1/26/2020 in Edison.

Audio
Format                                   : PCM
Format settings                          : Little / Signed
Codec ID                                 : 00000001-0000-0010-8000-00AA00389B71
Duration                                 : 2 s 625 ms
Bit rate mode                            : Constant
Bit rate                                 : 2 117 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 44.1 kHz
Bit depth                                : 24 bits
Stream size                              : 678 KiB (100%)


  


• How to do multiple input with streamio-ffmpeg ?

  12 août 2020, par Yozuu

  I would like to recreate this ffmpeg line (which works well) in my rails app :

  


  ffmpeg -i 1.mp4 -i 2.mp4 -filter_complex '[0] [1] afir=dry=10:wet=10' output.wav


  


  So here is my config :

  


  module EncodingConstants
  PROCESSED_DEFAULTS = {
    resolution:           '500x400',
    video_codec:          'libx264',
    constant_rate_factor: '30',
    frame_rate:           '25',
    audio_codec:          'aac',
    audio_bitrate:        '128k',
    audio_sample_rate:    '48000',
    progress: :processing_progress
  }.freeze

  AUDIO_EFFECTS = {
    multi_effect: %w[-i /home/yozuu/2.mp4 -filter_complex [0] [1] afir=dry=10:wet=10]
 }.freeze


  


  So Sidekiq send this back to me :

  


  I, [2020-08-12T19:40:38.828081 #2142]  INFO -- : Running transcoding...
["/sbin/ffmpeg", "-y", "-i", "/home/yozuu/labo/video-project/tmp/1597254011-2142-0001-8820/1.mp4", "-vcodec", "libx264", "-acodec", "aac", "-s", "500x282", "-i", "/home/yozuu/2.mp4", "-filter_complex", "'[0]", "[1]", "afir=dry=10:wet=10'", "-r", "25", "-b:a", "128k", "-ar", "48000", "-aspect", "1.7730496453900708", "/home/yozuu/labo/video-project/tmp/1597254011-2142-0001-8820/1.mp4"]

E, [2020-08-12T19:40:38.897575 #2142] ERROR -- : Failed encoding...
["/sbin/ffmpeg", "-y", "-i", "/home/yozuu/labo/video-project/tmp/1597254011-2142-0001-8820/1.mp4", "-vcodec", "libx264", "-acodec", "aac", "-s", "500x282", "-i", "/home/yozuu/2.mp4", "-filter_complex", "'[0]", "[1]", "afir=dry=10:wet=10'", "-r", "25", "-b:a", "128k", "-ar", "48000", "-aspect", "1.7730496453900708", "/home/yozuu/labo/video-project/tmp/1597254011-2142-0001-8820/1.mp4"]


.....

Unknown decoder 'libx264'

Errors: no output file created. 



  


  I don't understand why because for me the command line ffmpeg seems correct.
Anyone have a idea ?
Thank you.