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• Error using PyDub : pcm_s8 codec not supported in WAVE format

  29 mai 2020, par thf9527

  Tried to read in a WAVE file.

  



  Pydub has been working perfectly for the past few months, until I have encountered a specific WAVE file format where I could not import into Python (but it has no issue while playing on windows media player and other players).

  



  from pydub import AudioSegment

file = r"NICE_Dev.wav"
print(utils.mediainfo(file))
try:
    data = AudioSegment.from_file(file)

except Exception as e:
    print(e)


  



  The error message is :

  



  ffmpeg version 4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.3.1 (GCC) 20190414
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  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
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, wav, from 'NICE_Dev.wav':
  Duration: 00:25:55.39, bitrate: 64 kb/s
    Stream #0:0: Audio: pcm_mulaw ([7][0][0][0] / 0x0007), 8000 Hz, mono, s16, 64 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_mulaw (native) -> pcm_s8 (native))
Press [q] to stop, [?] for help
[wav @ 00000265db3c1bc0] pcm_s8 codec not supported in WAVE format
Could not write header for output file #0 (incorrect codec parameters ?): Function not implemented
Error initializing output stream 0:0 -- 
Conversion failed!


  



  I believe it is due to the encoding pcm_s8, but I could not figure out how to solve this issue, the details of the audio file using "utils.mediainfo" is :

  



  {'index': '0', 'codec_name': 'pcm_mulaw', 'codec_long_name': 'PCM mu-law / 
G.711 mu-law', 'profile': 'unknown', 'codec_type': 'audio', 'codec_time_base': 
'1/8000', 'codec_tag_string': '[7][0][0][0]', 'codec_tag': '0x0007', 
'sample_fmt': 's16', 'sample_rate': '8000', 'channels': '1', 'channel_layout': 
'unknown', 'bits_per_sample': '8', 'id': 'N/A', 'r_frame_rate': '0/0', 
'avg_frame_rate': '0/0', 'time_base': '1/8000', 'start_pts': 'N/A', 
'start_time': 'N/A', 'duration_ts': '12443128', 'duration': '1555.391000', 
'bit_rate': '64000', 'max_bit_rate': 'N/A', 'bits_per_raw_sample': 'N/A', 
'nb_frames': 'N/A', 'nb_read_frames': 'N/A', 'nb_read_packets': 'N/A', 
'DISPOSITION': {'default': '0', 'dub': '0', 'original': '0', 'comment': '0', 
'lyrics': '0', 'karaoke': '0', 'forced': '0', 'hearing_impaired': '0', 
'visual_impaired': '0', 'clean_effects': '0', 'attached_pic': '0', 
'timed_thumbnails': '0'}, 'filename': 'NICE_Dev.wav', 'nb_streams': '1', 
'nb_programs': '0', 'format_name': 'wav', 'format_long_name': 'WAV / WAVE 
(Waveform Audio)', 'size': '12443174', 'probe_score': '99'}


  


• Output file #0 does not contain any stream , Webm VP9 live streaming

  30 août 2019, par Salem

  The source video I use is H264 m3u8 live stream and this is the command I tried

  ffmpeg -re -i "http://sorce.com/live.m3u8" -c:v libvpx-vp9 -s 480x360 -keyint_min 60\
  
  -g 60 -speed 5 -tile-columns 4 -frame-parallel 1 -threads 8 -static-thresh 0 \
  
  -max-intra-rate 300 -deadline realtime -lag-in-frames 0 -error-resilient 1 \
  
  -b:v 300k -c:a libvorbis  -b:a 64k -ar 44100 -f webm_chunk -audio_chunk_duration 2000 \
  
  -header "/var/www/example.com/live/glass_360.hdr" -chunk_start_index 1  \
  
  /var/www/example.com/live/glass_360_%d.chk  

  I pickup this code from wkiki.webmproject.org
  this is command full log

  ffmpeg version N-94564-gaac382e Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
  
    configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/root/bin --enable-gpl --enable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libfribidi --enable-nonfree
  
    libavutil      56. 33.100 / 56. 33.100
  
    libavcodec     58. 55.100 / 58. 55.100
  
    libavformat    58. 30.100 / 58. 30.100
  
    libavdevice    58.  9.100 / 58.  9.100
  
    libavfilter     7. 58.100 /  7. 58.100
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  Input #0, mpegts, from 'http://sorce.com/live.m3u8':
  
    Duration: N/A, start: 3860.014278, bitrate: N/A
  
    Program 1 
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1600x900 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
  
      Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 121 kb/s
  
  Output #0, webm_chunk, to '/var/www/example.com/live/glass_360_%d.chk':
  
  Output file #0 does not contain any stream

  most of the time I got this error message

  [libvorbis @ 0x5617bae0c240] encoder setup failed Error initializing
  
   output stream 0:1 -- Error while opening encoder for output stream
  
   #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

  Here is FFMPEG command output

  Input #0, mpegts, from 'http://sorce.com/live.m3u8':
  
    Duration: N/A, start: 1369.000978, bitrate: N/A
  
    Program 1 
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, mono, fltp, 127 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> vp9 (libvpx-vp9))
  
    Stream #0:1 -> #0:1 (aac (native) -> vorbis (libvorbis))

  I already add video map before video and audio coding argue but I got same error

   -map  0:v:0 -c:v libvpx-vp9 and -map 0:a:0 -c:a libvorbis 

  I tried new broadcast command it works first after I disable the audio

  VP9_DASH_PARAMS="-tile-columns 4 -frame-parallel 1 -speed 6" && \
  
  ffmpeg -y -re -i http://sorce.com/live.m3u8 -c:v libvpx-vp9 -s 480x360 -b:v 150k \
  
  -keyint_min 150 -g 150 ${VP9_DASH_PARAMS} -an -f webm -dash 1 \
  
  video_1280x720_500k.webm && sleep 1 && ffmpeg  -f webm_dash_manifest \ 
  
  -i video_1280x720_500k.webm -c copy -f webm_dash_manifest - \ adaptation_sets "id=0"  manifest.mpd

  Source
  this command didn’t create manifest.mpd it created only video_1280x720_500k.webm

  ==Edit==

  I write new command (exactly as web wiki said )and everything works perfectly now

  VP9_LIVE_PARAMS=" -tile-columns 4 -frame-parallel 1 -threads 4 -static-thresh 0 -max-intra-rate 300 -deadline good -speed 5 -slices 0 -row-mt 1 -lag-in-frames 0 -error-resilient 1" ; \
  
  ffmpeg  -loglevel  0  -re -i http://sorce.com/live.m3u8 \
  
  -map 0:v   -pix_fmt yuv420p -c:v libvpx-vp9 -s 480x360  -r 23.976 -keyint_min 60 -g 60 ${VP9_LIVE_PARAMS} -b:v 300k \
  
   -f webm_chunk  -header "/var/www/example.com/live/glass_360.hdr"  -chunk_start_index 1 \
  
    /var/www/example.com/live/glass_360_%d.chk \
  
    -map 0:a  -c:a libvorbis -b:a 64k  \
  
    -f webm_chunk -audio_chunk_duration 2000 -header /var/www/example.com/live/glass_171.hdr \
  
      -chunk_start_index 1 /var/www/example.com/live/glass_171_%d.chk

  this is command to generate .mpd file

   ffmpeg -y -f webm_dash_manifest -live 1 \
  
    -i /var/www/example.com/live/glass_360.hdr \
  
    -f webm_dash_manifest -live 1 \
  
    -i /var/www/example.com/live/glass_171.hdr \
  
    -c copy  -map 0 -map 1 \
  
    -f webm_dash_manifest -live 1 \
  
      -adaptation_sets "id=0,streams=0 id=1,streams=1" \
  
      -chunk_start_index 1  -chunk_duration_ms 2000 \
  
      -time_shift_buffer_depth 7200  -minimum_update_period 7200 \
  
    /var/www/example.com/live/glass_live_manifest.mpd

  and this is webtest.html file

    <code class="echappe-js">&lt;script src='http://stackoverflow.com/feeds/tag/dash.all.min.js'&gt;&lt;/script&gt;
         
  
  

• Bash script doesn't read entire line

  4 octobre 2019, par Miguel Alatorre

  First off, I am in the early stages of learning bash shell scripting, so I apologize if I say / do anything that doesn’t make sense.

  Currently, I’m trying to have an SBC, a Khadas VIM3 specifically, run a python script to find and label faces in any given video from a local server. Currently, I need to reduce the frame rate and resolution of the video, which is where the bash script comes into play. I need to automate this process and thought I’d do it using a bash script and crontab.
  The file paths are found and output into a file from a separate script, and are read by the bash script. The problem comes when I try and call ffmpeg to use the file paths.

  The Code :

  pathFile="/home/khadas/Documents/paths"
  
  
  
  while IFS= read -r line
  
  do
  
          ffmpeg -i "$line" -vf scale=960:540 -y "$line"
  
          cp "$line" ./
  
  done < $pathFile

  The resulting error :

  : No such file or directoryalRecognition/10/14-53.h264+/20-509-26-10-14-53.mp4
  
  cp: cannot stat '/home/khadas/Downloads/FacialRecognition/10/14-53.h264+/20-509-26-10-14-53.mp4'$'\r': No such file or directory

  Example of the paths file (There will be hundreds of entries) :

  /home/khadas/Downloads/FacialRecognition/10/14-42.h264+/20-509-26-10-14-42.mp4
  
  /home/khadas/Downloads/FacialRecognition/10/59-06.h264+/20-509-26-10-59-06.mp4
  
  /home/khadas/Downloads/FacialRecognition/10/36-28.h264+/20-509-26-10-36-28.mp4
  
  /home/khadas/Downloads/FacialRecognition/10/14-53.h264+/20-509-26-10-14-53.mp4

  When using a trimmed down version, the script works as expected. Could it be an issue with the length of the lines ? Any help is much appreciated.