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• Transcoding hevc to h264 using GPU and scale_npp

  19 mai 2022, par JanZg

  I am trying to transcode hevc to h264 using GPU. Default input is 10 bit hevc but I also try it on 8 bit hevc. I use hevc_cuvid decoder and h264_nvenc encoder. While scaling using CPU its correct. I was also using scale_npp=w=1280:h=720:format=yuv420p and scale_cuda - > no result.

  


  Working command without using GPU to scale :

  


  /usr/local/bin/ffmpeg -y -v warning -c:v hevc_cuvid -an -sn -dn -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_on_network_error 1 -i http://1.2.3.4:8794 -c:v h264_nvenc -pix_fmt yuv420p -vf scale=1280:720 test_hevc.mp4


  


  But when I try to scale using GPU for example scale_cuda or scale_npp I get this error :

  


  Command :

  


  /usr/local/bin/ffmpeg -y -v warning -c:v hevc_cuvid -an -sn -dn -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_on_network_error 1 -i http://1.2.3.4:8794 -c:v h264_nvenc -pix_fmt yuv420p -vf scale_npp=1280:720 test_hevc.mp4


  


  Outputs :

  


  Error output with trace log level

  


  [graph 0 input from stream 0:0 @ 0x56164efb6b40] w:3840 h:2160 pixfmt:p010le tb:1/90000 fr:50/1 sar:1/1
[format @ 0x56164efb7940] Setting ‘pix_fmts’ to value ‘yuv420p’
[auto_scale_0 @ 0x56164efb9940] w:iw h:ih flags:’’ interl:0
[Parsed_scale_npp_0 @ 0x56164efb58c0] auto-inserting filter ‘auto_scale_0’ between the filter ‘graph 0 input from stream 0:0’ and the filter ‘Parsed_scale_npp_0’
Impossible to convert between the formats supported by the filter ‘graph 0 input from stream 0:0’ and the filter ‘auto_scale_0’
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0
[AVIOContext @ 0x56164ea41300] Statistics: 0 seeks, 0 writeouts
[AVIOContext @ 0x56164ea39c80] Statistics: 15357720 bytes read, 0 seeks
[AVHWDeviceContext @ 0x56164ea68480] Calling cu->cuCtxDestroy(hwctx->cuda_ctx)
Conversion failed!


  


  Full output with warning log level

  


  [hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[hevc @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 1 times
[hevc @ 0x555bd6e9f0c0] Error parsing NAL unit #2.
[mpegts @ 0x555bd6e85dc0] Could not find codec parameters for stream 0 (Video: hevc (HEVC / 0x43564548), none): unspecified size
Consider increasing the value for the ‘analyzeduration’ (0) and ‘probesize’ (5000000) options
[NULL @ 0x555bd6e9f0c0] PPS id out of range: 0
Last message repeated 66 times
Impossible to convert between the formats supported by the filter ‘graph 0 input from stream 0:0’ and the filter ‘auto_scale_0’
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0

Additional informations:

My FFmpeg Version below:

ffmpeg version N-103630-g06de593303 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --prefix=/usr/local --enable-libtwolame --enable-libzvbi --enable-nonfree --enable-cuda-nvcc --nvccflags=’-gencode arch=compute_75,code=sm_75 -O2’ --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64
libavutil 57. 5.100 / 57. 5.100
libavcodec 59. 7.103 / 59. 7.103
libavformat 59. 5.100 / 59. 5.100
libavdevice 59. 0.101 / 59. 0.101
libavfilter 8. 9.100 / 8. 9.100
libswscale 6. 1.100 / 6. 1.100
libswresample 4. 0.100 / 4. 0.100


  


  GPU : Tesla T4

  


  System : Linux tgpu 4.19.0-17-amd64 #1 SMP Debian 4.19.194-3 (2021-07-18) x86_64 GNU/Linux

  


  Nvcc version : nvcc : NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2020 NVIDIA Corporation
Built on Mon_Oct_12_20:09:46_PDT_2020
Cuda compilation tools, release 11.1, V11.1.105
Build cuda_11.1.TC455_06.29190527_0

  


  Is it possible to scale hevc using GPU and how to fix this ?
Thank You in advance.

  


• Unable to open audio file on Heroku using Librosa

  15 mars 2020, par Rohan Bojja

  I have a feature extraction REST API written in Python using the Librosa library (Extracting audio features), it receives an audio file through HTTP POST and responds with a list of features(such as MFCC,etc).

  Since librosa depends on SoundFile (libsndfile1 / libsndfile-dev), it doesn’t support all the formats, I’m converting the audio file using ffmpeg-python wrapper (https://kkroening.github.io/ffmpeg-python/) .

  It works just fine on my Windows 10 machine with Conda, but when I deploy it on Heroku, the librosa.load() functions returns an unknown format error, no matter what format I convert it to. I have tried FLAC, AIFF and WAV.

  My first guess is that the converted format isn’t supported by libsndfile1, but it works on my local server (plus, their documentation says AIFF and WAV are supported), so I’m a little lost.

  I have attached all the relevant snippets of code below, I can provide anything extra if necessary. Any help is highly appreciated. Thanks.

  UPDATE1 :

  I am using pipes instead of writing and reading from disk, worth a mention as the question could be misleading otherwise.

  The log :

  File "/app/app.py", line 31, in upload
  
  x , sr = librosa.load(audioFile,mono=True,duration=5)
  
  File "/app/.heroku/python/lib/python3.6/site-packages/librosa/core/audio.py", line 164, in load
  
  six.reraise(*sys.exc_info())
  
  File "/app/.heroku/python/lib/python3.6/site-packages/six.py", line 703, in reraise
  
  raise value
  
  File "/app/.heroku/python/lib/python3.6/site-packages/librosa/core/audio.py", line 129, in load
  
  with sf.SoundFile(path) as sf_desc:
  
  File "/app/.heroku/python/lib/python3.6/site-packages/soundfile.py", line 629, in __init__
  
  self._file = self._open(file, mode_int, closefd)
  
  File "/app/.heroku/python/lib/python3.6/site-packages/soundfile.py", line 1184, in _open
  
  "Error opening {0!r}: ".format(self.name))
  
  File "/app/.heroku/python/lib/python3.6/site-packages/soundfile.py", line 1357, in _error_check
  
  raise RuntimeError(prefix + _ffi.string(err_str).decode('utf-8', 'replace'))
  
  RuntimeError: Error opening <_io.BytesIO object at 0x7f46ad28beb8>: File contains data in an unknown format.
  
  10.69.244.94 - - [15/Mar/2020:12:37:28 +0000] "POST /receiveWav HTTP/1.1" 500 290 "-" "curl/7.55.1"

  Flask/Librosa code deployed on Heroku (app.py) :

  from flask import Flask, jsonify, request
  
  import scipy.optimize
  
  import os,pickle
  
  import numpy as np
  
  from sklearn.preprocessing import StandardScaler
  
  import librosa
  
  import logging
  
  import soundfile as sf
  
  from pydub import AudioSegment
  
  import subprocess as sp
  
  import ffmpeg
  
  from io import BytesIO
  
  
  
  logging.basicConfig(level=logging.DEBUG)
  
  
  
  app = Flask(__name__) 
  
  
  
  @app.route('/receiveWav',methods = ['POST'])
  
  def upload():
  
      if(request.method == 'POST'):
  
          f = request.files['file']
  
          app.logger.info(f'AUDIO FORMAT\n\n\n\n\n\n\n\n\n\n: {f}')
  
          proc = (
  
              ffmpeg.input('pipe:')
  
              .output('pipe:', format='aiff')
  
              .run_async(pipe_stdin=True,pipe_stdout=True, pipe_stderr=True)
  
          )
  
          audioFile,err = proc.communicate(input=f.read())
  
          audioFile =  BytesIO(audioFile)
  
          scaler = pickle.load(open("scaler.ok","rb"))
  
          x , sr = librosa.load(audioFile,mono=True,duration=5)
  
          y=x
  
          #Extract the features
  
          chroma_stft = librosa.feature.chroma_stft(y=y, sr=sr)
  
          spec_cent = librosa.feature.spectral_centroid(y=y, sr=sr)
  
          spec_bw = librosa.feature.spectral_bandwidth(y=y, sr=sr)
  
          rolloff = librosa.feature.spectral_rolloff(y=y, sr=sr)
  
          zcr = librosa.feature.zero_crossing_rate(y)
  
          rmse = librosa.feature.rms(y=y)
  
          mfcc = librosa.feature.mfcc(y=y, sr=sr)
  
          features = f'{np.mean(chroma_stft)} {np.mean(rmse)} {np.mean(spec_cent)} {np.mean(spec_bw)} {np.mean(rolloff)} {np.mean(zcr)}'    
  
          for e in mfcc:
  
              features += f' {np.mean(e)}'
  
          input_data2 = np.array([float(i) for i in features.split(" ")]).reshape(1,-1)
  
          input_data2 = scaler.transform(input_data2)
  
          return jsonify(input_data2.tolist())
  
  
  
  # driver function 
  
  if __name__ == '__main__':   
  
      app.run(debug = True) 

  Aptfile :

  libsndfile1
  
  libsndfile-dev
  
  libav-tools
  
  libavcodec-extra-53 
  
  libavcodec-extra-53
  
  ffmpeg 

  requirements.txt :

  aniso8601==8.0.0
  
  audioread==2.1.8
  
  certifi==2019.11.28
  
  cffi==1.14.0
  
  Click==7.0
  
  decorator==4.4.2
  
  ffmpeg-python==0.2.0
  
  Flask==1.1.1
  
  Flask-RESTful==0.3.8
  
  future==0.18.2
  
  gunicorn==20.0.4
  
  itsdangerous==1.1.0
  
  Jinja2==2.11.1
  
  joblib==0.14.1
  
  librosa==0.7.2
  
  llvmlite==0.31.0
  
  MarkupSafe==1.1.1
  
  marshmallow==3.2.2
  
  numba==0.48.0
  
  numpy==1.18.1
  
  pycparser==2.20
  
  pydub==0.23.1
  
  pytz==2019.3
  
  resampy==0.2.2
  
  scikit-learn==0.22.2.post1
  
  scipy==1.4.1
  
  six==1.14.0
  
  SoundFile==0.10.3.post1
  
  Werkzeug==1.0.0
  
  wincertstore==0.2

• Android-FFmpeg adding subtitle to mp4 video does not work

  7 septembre 2022, par ebdaa app

  I am trying to add srt file to a mp4 video using android mobile-ffmpeg , the code works with no error but the generated video does not contain the subtitle

  


  here is the code :

  


   String cmd = "-i " + videoPath + " -vf subtitles=\"" + subtitlePath + ":force_style='Alignment=10,Fontsize=18'\" " + OutputVideoPath;
 FFmpeg.executeAsync(cmd, new ExecuteCallback() {
    @Override
    public void apply(final long executionId, final int returnCode) {
         if (returnCode == RETURN_CODE_SUCCESS) {
         } else {
             
         }
    }
 });


  


  here are the logs

  


  I/mobile-ffmpeg: ffmpeg version v4.4-dev-416
     Copyright (c) 2000-2020 the FFmpeg developers
I/mobile-ffmpeg:   built with Android (6454773 based on r365631c2) clang version 9.0.8 (https://android.googlesource.com/toolchain/llvm-project 98c855489587874b2a325e7a516b99d838599c6f) (based on LLVM 9.0.8svn)
      configuration: --cross-prefix=arm-linux-androideabi- --sysroot=/files/android-sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm/neon/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=armv7-a --cpu=armv7-a --cc=armv7a-linux-androideabi24-clang --cxx=armv7a-linux-androideabi24-clang++ --extra-libs='-L/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm/neon/cpu-features/lib -lndk_compat' --target-os=android --enable-neon --enable-asm --enable-inline-asm --build-suffix=_neon --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --enable-shared --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --enable-small --disable-openssl --disable-xmm-clobber-test --disable-debug --enable-lto --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-static --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-videotoolbox --disable-audiotoolbox --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-iconv --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-mediacodec
I/mobile-ffmpeg:   libavutil      56. 55.100 / 56. 55.100
      libavcodec     58. 96.100 / 58. 96.100
I/mobile-ffmpeg:   libavformat    58. 48.100 / 58. 48.100
      libavdevice    58. 11.101 / 58. 11.101
      libavfilter     7. 87.100 /  7. 87.100
      libswscale      5.  8.100 /  5.  8.100
I/mobile-ffmpeg:   libswresample   3.  8.100 /  3.  8.100
I/mobile-ffmpeg: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001.mp4':
      Metadata:
        major_brand     : 
I/mobile-ffmpeg: isom
        minor_version   : 
I/mobile-ffmpeg: 512
        compatible_brands: 
I/mobile-ffmpeg: isomiso2mp41
I/mobile-ffmpeg:     encoder         : 
    Lavf58.48.100
I/mobile-ffmpeg:   Duration: 
    00:00:29.60
    , start: 
I/mobile-ffmpeg: 0.000000
    , bitrate: 
    466 kb/s
I/mobile-ffmpeg:     Stream #0:0
    (und)
I/mobile-ffmpeg: : Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:2 DAR 2:3], 336 kb/s
    , 
    5 fps, 
I/mobile-ffmpeg: 5 tbr, 
    10240 tbn, 
    5 tbc
I/mobile-ffmpeg:  (default)
I/mobile-ffmpeg:     Metadata:
          handler_name    : 
    VideoHandler
I/mobile-ffmpeg:     Stream #0:1
I/mobile-ffmpeg: (und)
    : Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
     (default)
I/mobile-ffmpeg:     Metadata:
I/mobile-ffmpeg:       handler_name    : 
    SoundHandler
W/mobile-ffmpeg: Codec AVOption preset (Configuration preset) specified for output file #0 (/storage/emulated/0/Download/QuranYaser/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001_sub.mp4) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
I/mobile-ffmpeg: Stream mapping:
I/mobile-ffmpeg:   Stream #0:0 -> #0:0
I/mobile-ffmpeg:  (mpeg4 (native) -> mpeg4 (native))
I/mobile-ffmpeg:   Stream #0:1 -> #0:1
     (aac (native) -> aac (native))
I/mobile-ffmpeg: Press [q] to stop, [?] for help
    frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
I/mobile-ffmpeg: [Parsed_subtitles_0 @ 0xf35ee820] Shaper: FriBidi 1.0.9 (SIMPLE)
I/mobile-ffmpeg: [Parsed_subtitles_0 @ 0xf35ee820] 
W/mobile-ffmpeg: [Parsed_subtitles_0 @ 0xf35ee820] No usable fontconfig configuration file found, using fallback.
    [Parsed_subtitles_0 @ 0xf35ee820] 
I/mobile-ffmpeg: [Parsed_subtitles_0 @ 0xf35ee820] Using font provider fontconfig
    [Parsed_subtitles_0 @ 0xf35ee820] 
W/mobile-ffmpeg: [graph 0 input from stream 0:0 @ 0xf35ee880] sws_param option is deprecated and ignored
I/mobile-ffmpeg: Output #0, mp4, to '/storage/emulated/0/Download/QuranYaser/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001_sub.mp4':
I/mobile-ffmpeg:   Metadata:
        major_brand     : 
    isom
I/mobile-ffmpeg:     minor_version   : 
    512
I/mobile-ffmpeg:     compatible_brands: 
I/mobile-ffmpeg: isomiso2mp41
        encoder         : 
I/mobile-ffmpeg: Lavf58.48.100
        Stream #0:0
I/mobile-ffmpeg: (und)
    : Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:2 DAR 2:3], q=2-31, 200 kb/s
    , 
I/mobile-ffmpeg: 5 fps, 
I/mobile-ffmpeg: 10240 tbn, 
    5 tbc
I/mobile-ffmpeg:  (default)
        Metadata:
I/mobile-ffmpeg:       handler_name    : 
    VideoHandler
          encoder         : 
I/mobile-ffmpeg: Lavc58.96.100 mpeg4
        Side data:
I/mobile-ffmpeg:       
    cpb: 
    bitrate max/min/avg: 0/0/200000 buffer size: 0 
    vbv_delay: N/A
I/mobile-ffmpeg:     Stream #0:1
    (und)
I/mobile-ffmpeg: : Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
     (default)
        Metadata:
I/mobile-ffmpeg:       handler_name    : 
    SoundHandler
I/mobile-ffmpeg:       encoder         : 
    Lavc58.96.100 aac
I/mobile-ffmpeg: frame=   11 fps=0.0 q=2.0 size=       0kB time=00:00:03.59 bitrate=   0.1kbits/s speed=7.16x    
I/mobile-ffmpeg: frame=   30 fps= 30 q=2.0 size=     256kB time=00:00:07.47 bitrate= 280.5kbits/s speed=7.44x    
I/mobile-ffmpeg: frame=   50 fps= 33 q=2.0 size=     512kB time=00:00:11.54 bitrate= 363.5kbits/s speed=7.67x    
I/mobile-ffmpeg: frame=   71 fps= 35 q=2.0 size=     768kB time=00:00:15.71 bitrate= 400.2kbits/s speed=7.83x    
I/mobile-ffmpeg: frame=   92 fps= 37 q=2.0 size=    1024kB time=00:00:19.78 bitrate= 424.0kbits/s speed=7.88x    
I/mobile-ffmpeg: frame=  110 fps= 36 q=2.0 size=    1280kB time=00:00:23.38 bitrate= 448.5kbits/s speed=7.75x    
I/mobile-ffmpeg: frame=  128 fps= 36 q=2.0 size=    1280kB time=00:00:27.12 bitrate= 386.6kbits/s speed=7.71x    
I/mobile-ffmpeg: frame=  148 fps= 38 q=8.4 Lsize=    1697kB time=00:00:29.40 bitrate= 472.9kbits/s speed=7.56x    
    video:1225kB audio:462kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 
I/mobile-ffmpeg: 0.559634%
I/mobile-ffmpeg: [aac @ 0xbe48c800] Qavg: 163.999


  


  here is a sample of srt file I am trying to merge :

  


  1
00:00:00,000 --> 00:00:03,326
 Text 1

2
00:00:03,326 --> 00:00:09,962
 Text 2

3
00:00:09,962 --> 00:00:16,160
 Text 3

4
00:00:16,160 --> 00:00:22,223
 Text 4


  


  any idea why the generated video does not contain the subtitle ?

  


  Update

  


  Based on below comment , I changed my code to use the latest ffmpeg-kit version , here is the new code

  


  String cmd = "-i " + videoPath + " -vf subtitles=\"" + subtitlePAth + ":force_style='Alignment=10,Fontsize=18\" " + 
   outputVideoPath;

   FFmpegKit.executeAsync(cmd, new FFmpegSessionCompleteCallback() {

        @Override
        public void apply(FFmpegSession session) {

        }
    }, new LogCallback() {

        @Override
        public void apply(com.arthenica.ffmpegkit.Log log) {


        }
    }, new StatisticsCallback() {

        @Override
        public void apply(Statistics statistics) {              

        }
    });`


  


  and here is the updated log

  


    ffmpeg version v4.5-dev-3393-g30322ebe3c Copyright (c) 2000-2021 the FFmpeg developers
    built with Android (7155654, based on r399163b1) clang version 11.0.5 (https://android.googlesource.com/toolchain/llvm-project 87f1315dfbea7c137aa2e6d362dbb457e388158d)
    configuration: --cross-prefix=arm-linux-androideabi- --sysroot=/files/android-sdk/ndk/22.1.7171670/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/storage/light/projects/ffmpeg-kit/prebuilt/android-arm-neon/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=armv7-a --cpu=armv7-a --target-os=android --enable-neon --enable-asm --enable-inline-asm --build-suffix=_neon --ar=arm-linux-androideabi-ar --cc=armv7a-linux-androideabi24-clang --cxx=armv7a-linux-androideabi24-clang++ --ranlib=arm-linux-androideabi-ranlib --strip=arm-linux-androideabi-strip --nm=arm-linux-androideabi-nm --extra-libs='-L/storage/light/projects/ffmpeg-kit/prebuilt/android-arm-neon/cpu-features/lib -lndk_compat' --disable-autodetect --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --disable-static --enable-shared --enable-pthreads --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --enable-small --disable-xmm-clobber-test --disable-debug --enable-lto --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-videotoolbox --disable-audiotoolbox --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-iconv --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libdav1d --enable-libkvazaar --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-libzimg --disable-openssl --enable-zlib --enable-mediacodec
    libavutil      57. 13.100 / 57. 13.100
    libavcodec     59. 15.102 / 59. 15.102
    libavformat    59. 10.100 / 59. 10.100
    libavdevice    59.  1.100 / 59.  1.100
    libavfilter     8. 21.100 /  8. 21.100
    libswscale      6.  1.102 /  6.  1.102
    libswresample   4.  0.100 /  4.  0.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001.mp4':
    Metadata:
      major_brand     : isom
      minor_version   : 512
      compatible_brands: isomiso2mp41
      encoder         : Lavf59.10.100
    Duration: 00:00:29.60, start: 0.000000, bitrate: 467 kb/s
    Stream #0:0[0x1](und): Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, bt470bg/bt709/bt709), 640x480 [SAR 1:2 DAR 2:3], 336 kb/s, 5 fps, 5 tbr, 10240 tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
    Stream #0:1[0x2](und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 129 kb/s (default)
      Metadata:
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
  [mpeg4 @ 0xbacc1080] The "sub_text_format" option is deprecated: Deprecated, does nothing
  [aac @ 0xbacc1400] The "sub_text_format" option is deprecated: Deprecated, does nothing
  Stream mapping:
    Stream #0:0 -> #0:0 (mpeg4 (native) -> mpeg4 (native))
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  Press [q] to stop, [?] for help
  [Parsed_subtitles_0 @ 0xf35141e0] libass API version: 0x1502000[Parsed_subtitles_0 @ 0xf35141e0] 
  [Parsed_subtitles_0 @ 0xf35141e0] libass source: commit: 0.15.2-0-gc967a5a3d9ec0d36af1148b3fdf2f307a21dd122[Parsed_subtitles_0 @ 0xf35141e0] 
  [Parsed_subtitles_0 @ 0xf35141e0] Shaper: FriBidi 1.0.11 (SIMPLE) HarfBuzz-ng 3.2.0 (COMPLEX)[Parsed_subtitles_0 @ 0xf35141e0] 
  [Parsed_subtitles_0 @ 0xf35141e0] No usable fontconfig configuration file found, using fallback.[Parsed_subtitles_0 @ 0xf35141e0] 
  [Parsed_subtitles_0 @ 0xf35141e0] Using font provider fontconfig[Parsed_subtitles_0 @ 0xf35141e0] 
  [Parsed_subtitles_0 @ 0xf35141e0] fontselect: failed to find any fallback with glyph 0x0 for font: (Arial, 400, 0)[Parsed_subtitles_0 @ 0xf35141e0] 
  Output #0, mp4, to '/storage/emulated/0/Download/7b85de4d-6af2-4eea-be9d-0d13c7f7819f/001001_sub5.mp4':
    Metadata:
      major_brand     : isom
      minor_version   : 512
      compatible_brands: isomiso2mp41
      encoder         : Lavf59.10.100
    Stream #0:0(und): Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, bt470bg/bt709/bt709, progressive), 640x480 [SAR 1:2 DAR 2:3], q=2-31, 200 kb/s, 5 fps, 10240 tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
        encoder         : Lavc59.15.102 mpeg4
      Side data:
        cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
      Metadata:
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
        encoder         : Lavc59.15.102 aac
  frame=    1 fps=0.0 q=5.7 size=       0kB time=00:00:01.55 bitrate=   0.2kbits/s speed= 2.4x    
  frame=   10 fps=8.7 q=2.0 size=       0kB time=00:00:03.50 bitrate=   0.1kbits/s speed=3.04x    
  frame=   20 fps= 12 q=2.0 size=       0kB time=00:00:05.36 bitrate=   0.1kbits/s speed=3.24x    
  frame=   32 fps= 15 q=2.0 size=     256kB time=00:00:07.87 bitrate= 266.5kbits/s speed=3.65x    
  frame=   45 fps= 17 q=2.0 size=     256kB time=00:00:10.49 bitrate= 199.8kbits/s speed=3.95x    
  frame=   58 fps= 18 q=2.0 size=     512kB time=00:00:12.97 bitrate= 323.2kbits/s speed=4.11x    
  frame=   69 fps= 19 q=2.0 size=     768kB time=00:00:15.23 bitrate= 413.1kbits/s speed=4.16x    
  frame=   81 fps= 19 q=2.0 size=     768kB time=00:00:17.60 bitrate= 357.5kbits/s speed=4.23x    
  frame=   92 fps= 20 q=2.0 size=    1024kB time=00:00:19.85 bitrate= 422.6kbits/s speed=4.26x    
  frame=  102 fps= 20 q=2.0 size=    1024kB time=00:00:21.89 bitrate= 383.1kbits/s speed=4.24x    
  frame=  115 fps= 20 q=2.0 size=    1280kB time=00:00:24.40 bitrate= 429.7kbits/s speed=4.31x    
  frame=  126 fps= 20 q=2.0 size=    1280kB time=00:00:26.67 bitrate= 393.0kbits/s speed=4.32x    
  frame=  139 fps= 21 q=2.0 size=    1536kB time=00:00:29.28 bitrate= 429.8kbits/s speed=4.39x    
  frame=  148 fps= 22 q=8.4 Lsize=    1701kB time=00:00:29.40 bitrate= 473.9kbits/s speed=4.34x    
  video:1225kB audio:466kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.561835%
  [aac @ 0xbacc2200] Qavg: 482.514