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• Getting realtime output of ffmpeg with pexpect

  27 février 2014, par Shuman

  hi i'm trying to get the progress info when calling ffmpeg command line tool, with pexpect, i can get the progress with regex, but the problem is after a few seconds, maybe 20 or 10sec, pexpect stops getting new print outs from ffmpeg, it's still running, i saw the output file size growing. am i doing something wrong ?

  cmd = 'ffmpeg -i rtmp://xxxx -c copy -absf aac_adtstoasc /usr/tmp/tmp/out.mp4'
  
  
  
  import os
  
  import re
  
  import time
  
  import subprocess 
  
  
  
  
  
  import pexpect
  
  
  
  thread = pexpect.spawn(cmd)
  
  
  
  print 'started'
  
  
  
  reo = re.compile("""\S+\s+(?P\d+)  # frame
  
                       \s\S+\s+(?P<fps>\d+)           # fps
  
                       \sq=(?P<q>\S+)                    # q
  
                       \s\S+\s+(?P<size>\S+)          # size
  
                       \stime=(?P<time>\S+)           # time
  
                       \sbitrate=(?P<bitrate>[\d\.]+) # bitrate
  
                       """, re.X)
  
  
  
  durationReo = (&#39;(?&lt;=Duration:\s)\S+(?=,)&#39;)
  
  
  
  cpl = thread.compile_pattern_list([
  
      pexpect.EOF,
  
      reo,
  
      durationReo
  
  ])
  
  
  
  
  
  while True:
  
      i = thread.expect_list(cpl, timeout=None)
  
      if i == 0: # EOF
  
          print "the sub process exited"
  
          break
  
      elif i == 1:
  
          frame_number = thread.match.group(0)
  
          print frame_number
  
      elif i == 2:
  
          durationLine = thread.match.group(0).strip()
  
          print &#39;Duration:&#39;, durationLine
  
  </bitrate></time></size></q></fps>

  the output is

  started                                                                                   
  
  Duration: 03:55:42.00                                                                     
  
  frame=   74 fps= 55 q=-1.0 size=     984kB time=00:00:06.17 bitrate=1304.5                
  
  frame=   89 fps= 43 q=-1.0 size=    1197kB time=00:00:07.43 bitrate=1319.8                
  
  frame=  113 fps= 41 q=-1.0 size=    1407kB time=00:00:09.33 bitrate=1234.8
  
  frame=  125 fps= 32 q=-1.0 size=    1613kB time=00:00:10.35 bitrate=1275.6
  
  frame=  132 fps= 29 q=-1.0 size=    1705kB time=00:00:10.95 bitrate=1274.7
  
  frame=  135 fps= 26 q=-1.0 size=    1825kB time=00:00:11.23 bitrate=1330.6
  
  frame=  140 fps= 24 q=-1.0 size=    2022kB time=00:00:11.60 bitrate=1426.5
  
  frame=  140 fps= 21 q=-1.0 size=    2097kB time=00:00:11.70 bitrate=1467.7
  
  frame=  142 fps= 19 q=-1.0 size=    2224kB time=00:00:11.79 bitrate=1544.4
  
  frame=  143 fps= 17 q=-1.0 size=    2447kB time=00:00:11.98 bitrate=1672.8
  
  frame=  145 fps= 16 q=-1.0 size=    2687kB time=00:00:12.07 bitrate=1822.8
  
  frame=  155 fps= 15 q=-1.0 size=    2780kB time=00:00:12.95 bitrate=1757.6
  
  frame=  163 fps= 15 q=-1.0 size=    2940kB time=00:00:13.65 bitrate=1764.2
  
  frame=  167 fps= 14 q=-1.0 size=    3062kB time=00:00:13.83 bitrate=1812.3
  
  frame=  168 fps= 13 q=-1.0 size=    3149kB time=00:00:14.02 bitrate=1839.4
  
  frame=  190 fps= 14 q=-1.0 size=    3322kB time=00:00:15.78 bitrate=1723.6
  
  frame=  213 fps= 15 q=-1.0 size=    3481kB time=00:00:17.78 bitrate=1603.4
  
  frame=  235 fps= 16 q=-1.0 size=    3671kB time=00:00:19.59 bitrate=1534.3
  
  frame=  244 fps= 16 q=-1.0 size=    3790kB time=00:00:20.29 bitrate=1530.0
  
  frame=  256 fps= 16 q=-1.0 size=    3909kB time=00:00:21.31 bitrate=1502.1
  
  frame=  276 fps= 16 q=-1.0 size=    4029kB time=00:00:22.94 bitrate=1438.8
  
  frame=  299 fps= 17 q=-1.0 size=    4177kB time=00:00:24.93 bitrate=1372.1
  
  frame=  339 fps= 19 q=-1.0 size=    4388kB time=00:00:28.28 bitrate=1270.9
  
  frame=  363 fps= 19 q=-1.0 size=    4557kB time=00:00:30.18 bitrate=1236.8
  
  frame=  405 fps= 20 q=-1.0 size=    4587kB time=00:00:33.76 bitrate=1113.1
  
  frame=  421 fps= 20 q=-1.0 size=    4598kB time=00:00:35.15 bitrate=1071.4

  it stops here but the code is still running. the file size is still growing and the code didn't exit, so it's not because of the timeout bug in pexpect.

  and also , if user press ctrl+c to terminate the main program, ffmpeg still runs in the bg, how do i also tell it to exit ?

  edit : i found that the culprit might be ffmpeg is not printing out all the info after 10 lines or so. it only update the display where it needs to be changed.so the regex is not matching, so what to do now , make 6 seperate regex ?

  edit2 : it seems if i use this regex, it works...

  reo = re.compile("""frame=\s*(?P\d+)  # frame
  
                       \sfps=\s*(?P<fps>\d+)           # fps
  
                       \sq=\s*(?P<q>\S+)                    # q
  
                       \ssize=\s*(?P<size>\S+)          # size
  
                       \stime=\s*(?P<time>\S+)           # time
  
                       \sbitrate=\s*(?P<bitrate>[\d\.]+) # bitrate
  
                       """, re.X)
  
  </bitrate></time></size></q></fps>

  it's saying only match when frame number is updated, ( maybe this implies all the other text are also updated ? )

• lavc/vorbisdsp : unroll RISC-V V inverse_coupling

  13 juillet 2023, par Rémi Denis-Courmont

  lavc/vorbisdsp : unroll RISC-V V inverse_coupling
  This increases the group multiplier as per T-Head C910 benchmarks :
  inverse_coupling_c : 4597.0
  
  inverse_coupling_rvv_i32 : 1312.7 (m1)
  
  inverse_coupling_rvv_i32 : 1116.7 (m2)
  
  inverse_coupling_rvv_i32 : 732.2  (m4)
  
  inverse_coupling_rvv_i32 : 898.0  (m8)
  

  • [DH] libavcodec/riscv/vorbisdsp_rvv.S

• ffmpeg output gives file not found error in python

  20 octobre 2022, par Batuhan Yılmaz

  Trying to build an auto subtitled video generator in Python. But couldn't generate the subtitled video of the input video using ffmpeg. Getting an error saying there is no output.mp4. FileNotFoundError : [Errno 2] No such file or directory : 'C :\Users\batuh\Desktop\auto-multipage\output.mp4'

  


  Can you help me out ? Full code is here : https://github.com/BatuhanYilmaz26/auto-sub-exp/blob/main/pages/02_up3.py

  


  Here's the parts where I used ffmpeg :

  


  def inferecence(loaded_model, uploaded_file, task):
    with open(f"{save_dir}/audio.mp3" , "wb") as f:
            f.write(uploaded_file.read())
        audio = ffmpeg.input(f"{save_dir}/audio.mp3")
        audio = ffmpeg.output(audio, f"{save_dir}/output.wav", acodec="pcm_s16le", ac=1, ar="16k")
        ffmpeg.run(audio, overwrite_output=True)
    if task == "Transcribe":
            options = dict(task="transcribe", best_of=5)
            results = loaded_model.transcribe(f"{save_dir}/output.wav", **options)
            vtt = getSubs(results["segments"], "vtt", 80)
            srt = getSubs(results["segments"], "srt", 80)
            lang = results["language"]
    return results["text"], vtt, srt, lang
    elif task == "Translate":
            options = dict(task="translate", best_of=5)
            results = loaded_model.transcribe(f"{save_dir}/output.wav", **options)
            vtt = getSubs(results["segments"], "vtt", 80)
            srt = getSubs(results["segments"], "srt", 80)
            lang = results["language"]
    return results["text"], vtt, srt, lang
    else:
    raise ValueError("Task not supported")
    
    results = inferecence(loaded_model, input_file, task)
    
    subprocess.run(shlex.split(f"ffmpeg -i {save_dir}/input.mp4 -i {save_dir}/output.wav -i transcript.srt -c:v copy -c:a copy -c:s copy -map 0:a -map 1:v -map 2:s -metadata:s:a:0 language={results[3]} -y {save_dir}/output.mp4"))
    #subprocess.run(shlex.split(f"ffmpeg -i {save_dir}/input.mp4 -vf {save_dir}/transcript.srt -y {save_dir}/output.mp4"))
    with open(os.path.join(os.getcwd(), "output.mp4"), "rb") as f:
                        data = f.read()
                    st.video(data)
                    st.download_button(label="Download Subtitled Video",
                                        data=data,
                                        file_name="output.mp4")


  


  sorry about the indentations

  


  Logfile :

  


  ffmpeg started on 2022-10-20 at 23:43:53
Report written to "ffmpeg-20221020-234353.log"
Command line:
ffmpeg -i C:UsersbatuhDesktopauto-multipagepageslocaloutput/input.mp4 -i C:UsersbatuhDesktopauto-multipagepageslocaloutput/output.wav -i transcript.srt -c:v copy -c:a copy -c:s copy -map 0:a -map 1:v -map 2:s -metadata:s:a:0 "language=eng" -y C:UsersbatuhDesktopauto-multipagepageslocaloutput/output.mp4 -report
ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200523
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --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 --enable-libopenmpt
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Splitting the commandline.
Reading option '-i' ... matched as input url with argument 'C:UsersbatuhDesktopauto-multipagepageslocaloutput/input.mp4'.
Reading option '-i' ... matched as input url with argument 'C:UsersbatuhDesktopauto-multipagepageslocaloutput/output.wav'.
Reading option '-i' ... matched as input url with argument 'transcript.srt'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-c:s' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:a'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '1:v'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '2:s'.
Reading option '-metadata:s:a:0' ... matched as option 'metadata' (add metadata) with argument 'language=eng'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option 'C:UsersbatuhDesktopauto-multipagepageslocaloutput/output.mp4' ... matched as output url.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url C:UsersbatuhDesktopauto-multipagepageslocaloutput/input.mp4.
Successfully parsed a group of options.
Opening an input file: C:UsersbatuhDesktopauto-multipagepageslocaloutput/input.mp4.
[NULL @ 000001fba186b9c0] Opening 'C:UsersbatuhDesktopauto-multipagepageslocaloutput/input.mp4' for reading
[file @ 000001fba186c140] Setting default whitelist 'file,crypto'
C:UsersbatuhDesktopauto-multipagepageslocaloutput/input.mp4: No such file or directory