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• high memory & cpu usage in ffmpeg C sample when muxing audio and video

  24 juin 2016, par chandu

  I am using the muxing.c example provided with ffmpeg 3.0 version to create an MP4 file (H.264 & AAC) with VS 2013.

  The sample is working fine with default width & height for video, but when I changed the width to 1920 and height to 1080, the sample is taking nearly 400MB & 60-70% cpu usage (using task manager & in Release mode) throughout the program. I have used multi threading also.

  I tried to free the encoded packet after calling write_frame(), but to no success.
  The memory is being released only after calling avcodec_close().

  Could anybody please tell me what I am doing wrong ?

  I am adding link (https://drive.google.com/open?id=0B75_-V7se7tmWUhyM0ItS0kzUVk) to code I tested with VS 2013.

  The screenshot link https://drive.google.com/open?id=0B75_-V7se7tmVm4tUjFtSnNNSHc

  The STREAM_DURATION value in the sample is set to 120 seconds (even tested with 600 seconds) and I changed default Height & Width values of AVCodecContext in add_stream function for video type to 1080 & 1920 respectively. Through out program, it is taking 355 MB, not changing at all. I think, once frame is encoded using avcodec_encode_video2 and written to the file, the memory should be released.

  Please correct me if I am wrong.

• InnoSetup python subprocess Popen ffmpeg

  1er juillet 2023, par Chris P

  In my code i have this line :

  


  self.p1 = Popen([self.ffmpeg_path,'-y','-loglevel','quiet','-i',self.retransmition_url,'epalxeis-radio.mp3'],stdin=PIPE,stdout=PIPE,stderr=PIPE, bufsize=1)


  


  which read an web radio stream and saves it locally with filename "epalxeis-radio.mp3"

  


  Using python to launch the script - works !
Using pyinstaller to launch the exe - works !
Using InnoSetup to launch the exe after installation - not working :(.

  


  The problem is that there is no epalxeis-radio.mp3 created when i try the third case (innosetup).

  


  The ffmpeg_path is : self.ffmpeg_path = os.path.abspath("extra/ffmpeg.exe")
and there is the extra folder in the same directory which is the innosetup exe.

  


  From Windows task manager there is no ffmpeg.exe shown in the tasks list.

  


  What wrong ?

  


  Edit : I used a smaller script to test the error :

  


  from subprocess import Popen, DEVNULL, STDOUT, PIPE
import os
import time
ffmpeg_path = os.path.abspath("extra/ffmpeg.exe")
retransmition_url = "http://shaincast.caster.fm:40636/listen.mp3?authn76260dc1cdf44a9132c0b63f85d9c67a"
with Popen([ffmpeg_path,'-y','-loglevel','quiet','-i',retransmition_url,'epalxeis-radio.mp3'],stdin=PIPE,stdout=PIPE,stderr=PIPE) as p1:
    time.sleep(1)


  


  in pyinstaller exe runs, but in innosetup exe stop immediately.

  


• FFMPEG in thread error : Thread was being aborted

  21 juillet 2018, par swabygw

  I’m using FFMPEG to convert video files from one file type to another. I do it via an ASP.NET web interface where a user can upload their file and the conversion happens in a .NET "thread", like this :

  trd = New Thread(Sub(sender) TestSub(folder,interv,objCounter,fname,fversource,fverdest,fext,fhost))
  
  trd.Priority = ThreadPriority.Lowest
  
  trd.Start

  While the conversion is happening, I’m logging the progress of the conversion by using the FFMPEG "-progress" argument.

  If I don’t use a thread, I get a complete log that looks like the output below. But when I run it in a thread, the conversion happens successfully still, but I get this error message from .NET : "Thread was being aborted." right after line #46...regardless of the file type, file size, etc., it always errors after line #46. I need to capture the rest of the output from the execution in the thread (just like when it was run outside of the thread). Can anyone help ?

  P.S., I have tried extending the server timeout, like this (it didn’t help) : httpRuntime executionTimeout = "600", in the web.config file.

  P.P.S, found something interesting. I’m using a StreamReader to capture the output, and I log each line of the StreamReader to an output file, like this :

  Dim ffReader As StreamReader
  
  prcFFMPEG.Start
  
  ffReader = prcFFMPEG.StandardError
  
  
  
  While Not ffReader.EndOfStream
  
      strFFOUT = "Test:" & ffReader.ReadLine
  
      LogConversion(fhost,"strFFOUT(ffReader.ReadLine): " & (strFFOUT).ToString)
  
  End While

  Here’s the odd part : In the While/EndWhile loop, if I print out just "Test" instead of ffReader.ReadLine, it runs, I get a lot more lines, and the thread aborts but I see FFMPEG still running in Task Manager. If I leave it running in Task Manager and rerun the code with ffReader.ReadLine, it will print out everything with no errors/aborts. But, if I end the background task in Task Manager, I get the same problem and error again.

  strFFOUT(0): ffmpeg version N-67331-g547fce9 Copyright (c) 2000-2014 the FFmpeg developers
  
  strFFOUT(1): built on Nov 1 2014 22:01:52 with gcc 4.9.1 (GCC)
  
  strFFOUT(2): configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-zlib
  
  strFFOUT(3): libavutil 54. 11.100 / 54. 11.100
  
  strFFOUT(4): libavcodec 56. 10.101 / 56. 10.101
  
  strFFOUT(5): libavformat 56. 12.100 / 56. 12.100
  
  strFFOUT(6): libavdevice 56. 2.100 / 56. 2.100
  
  strFFOUT(7): libavfilter 5. 2.101 / 5. 2.101
  
  strFFOUT(8): libswscale 3. 1.101 / 3. 1.101
  
  strFFOUT(9): libswresample 1. 1.100 / 1. 1.100
  
  strFFOUT(10): libpostproc 53. 3.100 / 53. 3.100
  
  strFFOUT(11): [mov,mp4,m4a,3gp,3g2,mj2 @ 02a28700] overread end of atom 'colr' by 1 bytes
  
  strFFOUT(12): Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\inetpub\wwwroot\site\short_sample.mp4':
  
  strFFOUT(13): Metadata:
  
  strFFOUT(14): major_brand : mp42
  
  strFFOUT(15): minor_version : 0
  
  strFFOUT(16): compatible_brands: mp42isomavc1
  
  strFFOUT(17): creation_time : 2010-03-20 21:29:11
  
  strFFOUT(18): encoder : HandBrake 0.9.4 2009112300
  
  strFFOUT(19): Duration: 00:00:05.57, start: 0.000000, bitrate: 551 kb/s
  
  strFFOUT(20): Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 560x320, 465 kb/s, 30 fps, 30 tbr, 90k tbn, 60 tbc (default)
  
  strFFOUT(21): Metadata:
  
  strFFOUT(22): creation_time : 2010-03-20 21:29:11
  
  strFFOUT(23): encoder : JVT/AVC Coding
  
  strFFOUT(24): Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 83 kb/s (default)
  
  strFFOUT(25): Metadata:
  
  strFFOUT(26): creation_time : 2010-03-20 21:29:11
  
  strFFOUT(27): [libx264 @ 02a2e840] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
  
  strFFOUT(28): [libx264 @ 02a2e840] profile High, level 2.1
  
  strFFOUT(29): [libx264 @ 02a2e840] 264 - core 142 r2479 dd79a61 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=23 ip_ratio=1.40 pb_ratio=1.30 aq=0
  
  strFFOUT(30): Output #0, mp4, to 'C:\inetpub\wwwroot\site\short_sample3.mp4':
  
  strFFOUT(31): Metadata:
  
  strFFOUT(32): major_brand : mp42
  
  strFFOUT(33): minor_version : 0
  
  strFFOUT(34): compatible_brands: mp42isomavc1
  
  strFFOUT(35): encoder : Lavf56.12.100
  
  strFFOUT(36): Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 480x320, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
  
  strFFOUT(37): Metadata:
  
  strFFOUT(38): creation_time : 2010-03-20 21:29:11
  
  strFFOUT(39): encoder : Lavc56.10.101 libx264
  
  strFFOUT(40): Stream #0:1(eng): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s (default)
  
  strFFOUT(41): Metadata:
  
  strFFOUT(42): creation_time : 2010-03-20 21:29:11
  
  strFFOUT(43): encoder : Lavc56.10.101 libvo_aacenc
  
  strFFOUT(44): Stream mapping:
  
  strFFOUT(45): Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  strFFOUT(46): Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
  
  strFFOUT(47): frame= 96 fps=0.0 q=23.0 size= 146kB time=00:00:03.37 bitrate= 355.3kbits/s 
  
  strFFOUT(48): frame= 166 fps=0.0 q=-1.0 Lsize= 274kB time=00:00:05.58 bitrate= 401.7kbits/s 
  
  strFFOUT(49): 
  
  strFFOUT(50): video:179kB audio:87kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.677233%
  
  strFFOUT(51): [libx264 @ 02a2e840] frame I:1 Avg QP:20.00 size: 19154
  
  strFFOUT(52): [libx264 @ 02a2e840] frame P:48 Avg QP:23.00 size: 1976
  
  strFFOUT(53): [libx264 @ 02a2e840] frame B:117 Avg QP:24.63 size: 588
  
  strFFOUT(54): [libx264 @ 02a2e840] consecutive B-frames: 3.6% 0.0% 21.7% 74.7%
  
  strFFOUT(55): [libx264 @ 02a2e840] mb I I16..4: 46.2% 21.2% 32.7%
  
  strFFOUT(56): [libx264 @ 02a2e840] mb P I16..4: 1.1% 0.3% 0.2% P16..4: 29.1% 7.5% 7.3% 0.0% 0.0% skip:54.3%
  
  strFFOUT(57): [libx264 @ 02a2e840] mb B I16..4: 0.0% 0.0% 0.1% B16..8: 17.5% 3.6% 1.2% direct: 1.1% skip:76.4% L0:39.0% L1:49.6% BI:11.4%
  
  strFFOUT(58): [libx264 @ 02a2e840] 8x8 transform intra:21.9% inter:51.2%
  
  strFFOUT(59): [libx264 @ 02a2e840] coded y,uvDC,uvAC intra: 40.4% 70.7% 40.6% inter: 5.8% 10.3% 3.0%
  
  strFFOUT(60): [libx264 @ 02a2e840] i16 v,h,dc,p: 0% 25% 1% 74%
  
  strFFOUT(61): [libx264 @ 02a2e840] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 9% 36% 14% 5% 7% 4% 13% 4% 8%
  
  strFFOUT(62): [libx264 @ 02a2e840] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 25% 12% 4% 8% 8% 13% 6% 8%
  
  strFFOUT(63): [libx264 @ 02a2e840] i8c dc,h,v,p: 49% 35% 10% 6%
  
  strFFOUT(64): [libx264 @ 02a2e840] Weighted P-Frames: Y:0.0% UV:0.0%
  
  strFFOUT(65): [libx264 @ 02a2e840] ref P L0: 65.7% 5.6% 18.5% 10.3%
  
  strFFOUT(66): [libx264 @ 02a2e840] ref B L0: 79.0% 14.9% 6.0%
  
  strFFOUT(67): [libx264 @ 02a2e840] ref B L1: 91.1% 8.9%
  
  strFFOUT(68): [libx264 @ 02a2e840] kb/s:264.22