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    Il permet de configurer finement votre site.
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Sur d’autres sites (4094)

  • FFMPEG command from Python 3.5 does not actually create audio file

    20 décembre 2017, par Nathan Blaine

    I have a Django web application that accepts user uploaded videos/audio and saves them into a folder ’../WebAppDirectory/media/recordings’.

    I am then using a speech to text API to get a rough transcription of the audio. This is working fine for .wav and .mp4 files, but the web app also accepts videos (.MOV) that I would like to first convert to .wav, then pass off to the API.

    Using ffmpeg from my command line like this

    ffmpeg -i C:\Users\Nathan\Desktop\MeetingRecorderWebAPP\media\recordings\upload_sample.MOV -ab 160k -ac 2 -ar 44100 -vn upload_sample.wav

    Correctly creates the .wav file from the original .MOV.

    However, when I run this from python with

    subprocess.check_call(command, shell=True)

    ffmpeg responds with

    File ’upload_sample.wav’ already exists. Overwrite ? [y/N]

    While Python tells me

    FileNotFoundError : [Errno 2] No such file or directory : ’C :\Users\Nathan\Desktop\MeetingRecorderWebAPP\media\recordings\upload_sample.wav’

    It is also worth noting that I do not see a ’upload_sample.wav’ file in the media/recordings/ directory.

    This leads me to believe that maybe Python and ffmpeg are looking in different folders, but I am not sure where I am going wrong. When I print the command from the subprocess.check_call and copy/paste it into cmd, the file is created as expected.

    Hoping someone with some experience with ffmpeg/Python subprocess can help shed some light ! Here are the files I am working with :

    Folder Structure

    DjangoWebApp
    
|---media
    
|---|---imgs
    
|---|---recordings
    
|---|---|---upload_sample.MOV
    
|---uploaded_audio_to_text.py

    uploaded_audio_to_text.py

    import speech_recognition as sr
    
from os import path
    
import os
    
import subprocess
    

    

    
def speech_to_text(file_name):
    
    AUDIO_FILE = path.join(path.dirname(path.realpath(__file__)), 'media','recordings', file_name)
    
    print("Looking at path: ",AUDIO_FILE)
    
    # get extension
    
    AUDIO_FILE_EXT = os.path.splitext(AUDIO_FILE)[1]
    

    
    if(AUDIO_FILE_EXT == '.MOV'):
    
        print("File is not .wav: ", AUDIO_FILE_EXT, "found. Converting...")
    
        # We will use subprocess and ffmpeg to convert this .MOV file to .wav, so we can send to API
    
        temp_wav = os.path.splitext(file_name)[0] + '.wav'
    
        print("New audio file will be: ", temp_wav)
    
        # build CMD ffmpeg command
    
        command = "ffmpeg -i "
    
        command += AUDIO_FILE
    
        command += " -ab 160k -ac 2 -ar 44100 -vn "
    
        command += temp_wav
    

    
        print("Attempting to run this command: \n",command)
    
        print(subprocess.check_call(command, shell=True))
    
        print("Past Subprocess.call")
    
        AUDIO_FILE = path.join(path.dirname(path.realpath(__file__)), 'media','recordings', temp_wav)
    
        print("AUDIO_FILE now set to: ", AUDIO_FILE)
    

    
    else:
    
        # continue with what we are doing
    
        pass
    

    

    
    r = sr.Recognizer()
    
    with sr.AudioFile(AUDIO_FILE) as source:
    
        audio = r.record(source)  # read the entire audio file
    
        text_transcription = "Sentinel"
    
        # recognize speech using Microsoft Bing Voice Recognition
    
        BING_KEY = "MY_KEY_:)"
    
        try:
    
            text_transcription = r.recognize_bing(audio, key=BING_KEY)
    
        except sr.UnknownValueError:
    
            print("Microsoft Bing Voice Recognition could not understand audio")
    
        except sr.RequestError as e:
    
            print("Could not request results from Microsoft Bing Voice Recognition service; {0}".format(e))
    

    
    return text_transcription
    

    

    
#my tests
    
my_relative_file_path = "upload_sample.MOV"
    
print(speech_to_text(my_relative_file_path))

    Console output (traceback and my print()’s)

    Looking at path:  C:\Users\Nathan\Desktop\MeetingRecorderWebAPP\media\recordings\upload_sample.MOV 
    
File is not .wav:  .MOV found. Converting... 
    
New audio file will be:  upload_sample.wav Attempting to run this command:
    
 ffmpeg -i C:\Users\Nathan\Desktop\MeetingRecorderWebAPP\media\recordings\upload_sample.MOV -ab 160k -ac 2 -ar 44100 -vn upload_sample.wav 
    
ffmpeg version git-2017-12-18-74f408c Copyright (c) 2000-2017 the FFmpeg developers   built with gcc 7.2.0 (GCC)   
    
----REMOVED SOME FFMPEG OUTPUT FOR BREVITY----
    
File 'upload_sample.wav' already exists. Overwrite ? [y/N] y 
    
Stream mapping:   Stream #0:1 -> #0:0 (aac (native) -> pcm_s16le (native)) Press [q] to stop, [?] for help Output #0, wav, to 'upload_sample.wav':   Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    com.apple.quicktime.creationdate: 2017-12-19T16:06:10-0500
    
    com.apple.quicktime.make: Apple
    
    com.apple.quicktime.model: iPhone 6
    
    com.apple.quicktime.software: 10.3.3
    
    ISFT            : Lavf58.3.100
    
    Stream #0:0(und): Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s (default)
    
    Metadata:
    
      creation_time   : 2017-12-19T21:06:11.000000Z
    
      handler_name    : Core Media Data Handler
    
      encoder         : Lavc58.8.100 pcm_s16le size=    1036kB time=00:00:06.01 bitrate=1411.3kbits/s speed=N/A     video:0kB audio:1036kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007352% 
    
0 
    
Traceback (most recent call last): Past Subprocess.call   
    
File "C:\Users\Nathan\Desktop\MeetingRecorderWebAPP\uploaded_audio_to_text.py", line 53, in <module> 
    
AUDIO_FILE now set to:  C:\Users\Nathan\Desktop\MeetingRecorderWebAPP\media\recordings\upload_sample.wav
    
    print(speech_to_text(my_relative_file_path))   
    
File "C:\Users\Nathan\Desktop\MeetingRecorderWebAPP\uploaded_audio_to_text.py", line 36, in speech_to_text
    
    with sr.AudioFile(AUDIO_FILE) as source:   
    
File "C:\Users\Nathan\AppData\Local\Programs\Python\Python36-32\lib\site-packages\speech_recognition\__init__.py", line 203, in __enter__
    
    self.audio_reader = wave.open(self.filename_or_fileobject, "rb")   
    
File "C:\Users\Nathan\AppData\Local\Programs\Python\Python36-32\lib\wave.py", line 499, in open
    
    return Wave_read(f)   
    
File "C:\Users\Nathan\AppData\Local\Programs\Python\Python36-32\lib\wave.py", line 159, in __init__
    
    f = builtins.open(f, 'rb') 
    
FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\Nathan\\Desktop\\MeetingRecorderWebAPP\\media\\recordings\\upload_sample.wav'
    

    
Process finished with exit code 1
    
</module>

  • Detect rotation angle and rotate final video using ffmpeg version 2.8

    9 novembre 2017, par Hemant Kumar

    I used to work on ffmpeg 2.2 until now and was detecting rotation angle of video uploaded from android / iPhone mobiles and rotate the resulting video so that it run perfectly on a correct angle.

    But since I have updated the ffmpeg to version 2.8 I am getting this rotation problem. My queries are not rotating the videos as they were earlier.

    Here’r the commands I was using :

    To check rotation angle :

    ffprobe -of json -show_streams {$input} | grep rotate

    below is my final command to convert a video to mp4

    "ffmpeg -i {$input} -strict -2 -vcodec libx264 -preset slow -vb 500k -maxrate 500k -bufsize 1000k -vf 'scale=-1:480 ".fix_video_orientation($input)."' -threads 0 -ab 64k -s {$resolution}  -movflags faststart -metadata:s:v:0 rotate=0 {$output}";

    "fix_video_orientation" function is given below. It detect the angle of rotation of the initial video and output optimal option for rotating the final video.

    function fix_video_orientation($input){
    

    
$return= ", transpose=1 ";
    

    
$dd= exec("ffprobe -of json -show_streams  {$input}   | grep rotate");
    

    
if(!empty($dd)){
    

    
$dd=explode(":",$dd);
    
$rotate=str_replace(",","",str_replace('"',"",$dd[1]));
    

    
if($rotate=="90")return $return;
    

    
else if ($rotate=="180") return ", transpose=2,transpose=2 ";
    

    
else if($rotate == "270") return ", transpose=2 ";
    
}

    Currently above script is supporting "flv","avi","mp4","mkv","mpg","wmv","asf","webm","mov","3gp","3gpp" extensions, also the script is supporting the resulting .mp4 file to play on all browsers and devices.

    Now the ffprobe command is not returning rotation angle and so a portrait video if uploaded from iphone is showing as landscape on the website.

    Output console of ffprobe command :

    ffprobe version N-77455-g4707497 Copyright (c) 2007-2015 the FFmpeg developers
    
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
    
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
    
libavutil 55. 11.100 / 55. 11.100
    
libavcodec 57. 20.100 / 57. 20.100
    
libavformat 57. 20.100 / 57. 20.100
    
libavdevice 57. 0.100 / 57. 0.100
    
libavfilter 6. 21.101 / 6. 21.101
    
libavresample 3. 0. 0 / 3. 0. 0
    
libswscale 4. 0.100 / 4. 0.100
    
libswresample 2. 0.101 / 2. 0.101
    
libpostproc 54. 0.100 / 54. 0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/standard/PORTRAIT.m4v':
    
Metadata:
    
major_brand : qt
    

    
minor_version : 0
    
compatible_brands: qt
    

    
creation_time : 2016-02-03 05:25:18
    
com.apple.quicktime.make: Apple
    
com.apple.quicktime.model: iPhone 4S
    
com.apple.quicktime.software: 9.2.1
    
com.apple.quicktime.creationdate: 2016-02-03T10:52:11+0530
    
Duration: 00:00:03.34, start: 0.000000, bitrate: 7910 kb/s
    
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
    
Metadata:
    
creation_time : 2016-02-03 05:25:18
    
handler_name : Core Media Data Handler
    
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 720x1280 [SAR 1:1 DAR 9:16], 7832 kb/s, 29.97 fps, 29.97 tbr, 600 tbn, 50 tbc (default)
    
Metadata:
    
creation_time : 2016-02-03 05:25:18
    
handler_name : Core Media Data Handler
    
encoder : H.264
    
Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
    
Metadata:
    
creation_time : 2016-02-03 05:25:18
    
handler_name : Core Media Data Handler
    
Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
    
Metadata:
    
creation_time : 2016-02-03 05:25:18
    
handler_name : Core Media Data Handler
    
Unsupported codec with id 0 for input stream 2
    
Unsupported codec with id 0 for input stream 3

    If latest version of ffmpeg (2.8) is used to auto rotate the video, can you please suggest me what option I need to add or remove from my final command.

  • ffmpeg error opening filters at mobile browser

    1er novembre 2017, par lzmhhh123

    I use the ffmpeg at mobile browser. But it responds Error opening filter both at safari and chrome. I need help. The log are as following.

    The IOS 11.0.2 Safari logs :

    [Log] ffmpeg version n3.1.2 Copyright (c) 2000-2016 the FFmpeg developers (bundle.js, line 43469)
    
  built with emcc (Emscripten gcc/clang-like replacement) 1.36.7 ()
    
  configuration: --cc=emcc --enable-cross-compile --target-os=none --arch=x86 --disable-runtime-cpudetect --disable-asm --disable-fast-unaligned --disable-pthreads --disable-w32threads --disable-os2threads --disable-debug --disable-stripping --disable-all --enable-ffmpeg --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-avfilter --disable-network --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vda --disable-vdpau --enable-decoder=vp8 --enable-decoder=vp9 --enable-decoder=theora --enable-decoder=mpeg2video --enable-decoder=mpeg4 --enable-decoder=h264 --enable-decoder=hevc --enable-decoder=png --enable-decoder=mjpeg --enable-decoder=vorbis --enable-decoder=opus --enable-decoder=mp3 --enable-decoder=ac3 --enable-decoder=aac --enable-decoder=ass --enable-decoder=ssa --enable-decoder=srt --enable-decoder=webvtt --enable-demuxer=matroska --enable-demuxer=ogg --enable-demuxer=avi --enable-demuxer=mov --enable-demuxer=flv --enable-demuxer=mpegps --enable-demuxer=image2 --enable-demuxer=mp3 --enable-demuxer=concat --enable-protocol=file --enable-filter=aresample --enable-filter=scale --enable-filter=crop --enable-filter=overlay --disable-bzlib --disable-iconv --disable-libxcb --disable-lzma --disable-sdl --disable-securetransport --disable-xlib --disable-zlib --enable-encoder=libx264 --enable-encoder=libmp3lame --enable-encoder=aac --enable-muxer=mp4 --enable-muxer=mp3 --enable-muxer=null --enable-gpl --enable-libmp3lame --enable-libx264 --extra-cflags=-I../lame/dist/include --extra-ldflags=-L../lame/dist/lib
    
  libavutil      55. 28.100 / 55. 28.100
    
  libavcodec     57. 48.101 / 57. 48.101
    
  libavformat    57. 41.100 / 57. 41.100
    
  libavfilter     6. 47.100 /  6. 47.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  1.100 /  2.  1.100
    
[h264 @ 0x809df0] Warning: not compiled with thread support, using thread emulation
    
[aac @ 0x80e380] Warning: not compiled with thread support, using thread emulation
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '53119917068__7A6AFE7C-86EC-42F4-8995-A9B09B16C2DB.MOV':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    creation_time   : 2017-11-01 03:19:31
    
    com.apple.quicktime.make: Apple
    
    com.apple.quicktime.model: iPhone 6
    
    com.apple.quicktime.software: 11.0.2
    
    com.apple.quicktime.creationdate: 2017-11-01T11:19:31+0800
    
  Duration: 00:00:00.20, start: 0.000000, bitrate: 1467 kb/s
    
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt709/bt709), 480x360, 1131 kb/s, 30 fps, 30 tbr, 600 tbn, 1200 tbc (default)
    
    Metadata:
    
      rotate          : 90
    
      creation_time   : 2017-11-01 03:19:31
    
      handler_name    : Core Media Data Handler
    
      encoder         : H.264
    
    Side data:
    
      displaymatrix: rotation of -90.00 degrees
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 80 kb/s (default)
    
    Metadata:
    
      creation_time   : 2017-11-01 03:19:31
    
      handler_name    : Core Media Data Handler
    
    Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
    
    Metadata:
    
      creation_time   : 2017-11-01 03:19:31
    
      handler_name    : Core Media Data Handler
    
    Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
    
    Metadata:
    
      creation_time   : 2017-11-01 03:19:31
    
      handler_name    : Core Media Data Handler
    
Error opening filters!

    The Android 7.0 Chrome logs :

    ffmpeg version n3.1.2 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with emcc (Emscripten gcc/clang-like replacement) 1.36.7 ()
    
  configuration: --cc=emcc --enable-cross-compile --target-os=none --arch=x86 --disable-runtime-cpudetect --disable-asm --disable-fast-unaligned --disable-pthreads --disable-w32threads --disable-os2threads --disable-debug --disable-stripping --disable-all --enable-ffmpeg --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-avfilter --disable-network --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vda --disable-vdpau --enable-decoder=vp8 --enable-decoder=vp9 --enable-decoder=theora --enable-decoder=mpeg2video --enable-decoder=mpeg4 --enable-decoder=h264 --enable-decoder=hevc --enable-decoder=png --enable-decoder=mjpeg --enable-decoder=vorbis --enable-decoder=opus --enable-decoder=mp3 --enable-decoder=ac3 --enable-decoder=aac --enable-decoder=ass --enable-decoder=ssa --enable-decoder=srt --enable-decoder=webvtt --enable-demuxer=matroska --enable-demuxer=ogg --enable-demuxer=avi --enable-demuxer=mov --enable-demuxer=flv --enable-demuxer=mpegps --enable-demuxer=image2 --enable-demuxer=mp3 --enable-demuxer=concat --enable-protocol=file --enable-filter=aresample --enable-filter=scale --enable-filter=crop --enable-filter=overlay --disable-bzlib --disable-iconv --disable-libxcb --disable-lzma --disable-sdl --disable-securetransport --disable-xlib --disable-zlib --enable-encoder=libx264 --enable-encoder=libmp3lame --enable-encoder=aac --enable-muxer=mp4 --enable-muxer=mp3 --enable-muxer=null --enable-gpl --enable-libmp3lame --enable-libx264 --extra-cflags=-I../lame/dist/include --extra-ldflags=-L../lame/dist/lib
    
  libavutil      55. 28.100 / 55. 28.100
    
  libavcodec     57. 48.101 / 57. 48.101
    
  libavformat    57. 41.100 / 57. 41.100
    
  libavfilter     6. 47.100 /  6. 47.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  1.100 /  2.  1.100
    
[hevc @ 0x809db0] Warning: not compiled with thread support, using thread emulation
    
[aac @ 0x80ea90] Warning: not compiled with thread support, using thread emulation
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'VID_20171101_113436.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: isommp42
    
    creation_time   : 2017-11-01 03:34:40
    
    com.android.version: 7.0
    
  Duration: 00:00:02.69, start: 0.000000, bitrate: 32551 kb/s
    
    Stream #0:0(eng): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv), 3840x2160, 29756 kb/s, SAR 1:1 DAR 16:9, 29.60 fps, 29.83 tbr, 90k tbn, 90k tbc (default)
    
    Metadata:
    
      rotate          : 90
    
      creation_time   : 2017-11-01 03:34:40
    
      handler_name    : VideoHandle
    
    Side data:
    
      displaymatrix: rotation of -90.00 degrees
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 192 kb/s (default)
    
    Metadata:
    
      creation_time   : 2017-11-01 03:34:40
    
      handler_name    : SoundHandle
    
Error opening filters!

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