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• command line closes too fast inside python using ffmpeg

  18 février 2014, par user3012914

  I am using python to create a Macro Module inside MevisLab environment. I wanted to use ffmpeg in command prompt inside Python. The Problem is the command prompt closes too fast that i couldnt read while executing ffmpeg.

  My code

    t = 'ffmpeg -r'+str(ctx.field("FrameRate").value)+'-f image2 -pix_fmt yuv44p -s 1920x1080 -i'+path+'%0d.png -vodec libx264 -crf 15'+path+'.mp4'
  
  
  
  os.system(t)

• error when converting mts to mp4

  6 janvier 2015, par Chan Kim

  I have many video files that I want to convert to mp4.
  so I installed ffmpeg on my win7 PC (64 bit) which is using shared library.
  I tried to convert an MTS file to MP4 and I get this error.
  What is the problem ?

  $ ffmpeg -i 20140806114251.MTS 20140806114251.mp4
  
  ffmpeg version N-68788-g37b35fe Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Dec 30 2014 22:18:55 with gcc 4.9.2 (GCC)
  
    configuration: --disable-static --enable-shared --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-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 15.100 / 54. 15.100
  
    libavcodec     56. 19.100 / 56. 19.100
  
    libavformat    56. 16.102 / 56. 16.102
  
    libavdevice    56.  3.100 / 56.  3.100
  
    libavfilter     5.  6.100 /  5.  6.100
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mpegts, from '20140806114251.MTS':
  
    Duration: 00:00:19.04, start: 1.033367, bitrate: 16273 kb/s
  
    Program 1
  
      Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 448 kb/s
  
      Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
  
  [libx264 @ 0000000002b60a20] using SAR=1/1
  
  [libx264 @ 0000000002b60a20] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0000000002b60a20] profile High, level 4.0
  
  [libx264 @ 0000000002b60a20] 264 - core 144 r2525 40bb568 - 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_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [libvo_aacenc @ 00000000028a4020] Unable to set encoding parameters
  
  Output #0, mp4, to '20140806114251.mp4':
  
      Stream #0:0: Video: h264 (libx264), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 29.97 fps, 29.97 tbn, 29.97 tbc
  
      Metadata:
  
        encoder         : Lavc56.19.100 libx264
  
      Stream #0:1: Audio: aac, 0 channels, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc56.19.100 libvo_aacenc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (ac3 (native) -> aac (libvo_aacenc))
  
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

  EDIT : I thought I solved this problem by using

  ffmpeg -i filename1.mts filename1.mkv

  my Samsung LED TV supports mkv file and during the conversion, it shows

    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (ac3 (native) -> vorbis (libvorbis))

  But Alas ! my TV doesn’t support vorbis codec. It only supports mp3, ac3, lpcm, and ADPCM when using mkv container. So the question is : How do people select output audio codec ?

• Ffmpeg - Convert Wav to OGG on Android (wrong metadata on some devices)

  13 décembre 2016, par Pepa Zapletal

  I have in the app Wav file and I want to convert it to the OGG format.

  I’m using ffmpeg library for it and this command :

  ffmpeg -i /storage/emulated/0/Test.wav -c:a libvorbis -q:a 5 /storage/emulated/0/Test.ogg

  But I have problem play correctly the generated OGG file on some Android devices. If I open this file in standard MediaPlayer then I get the wrong file duration, seeking is also not working very well BUT the file is played whole and correctly. This happens for example on Huawei M2 with Android 5.1 but on Samsung Galaxy S5 (with Android 5.1) the generated file is OK and playing is also OK.

  Do you have some idea where can be a problem ?

  Full output from ffmpeg :

  ffmpeg version n2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
  
  built with gcc 4.9 (GCC) 20140827 (prerelease)
  
    configuration: --target-os=linux --cross-prefix=/home/chrono/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --enable-runtime-cpudetect --sysroot=/home/chrono/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libtheora --enable-libfdk-aac --enable-nonfree --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/chrono/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/chrono/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/chrono/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=softfp' --extra-ldflags='-L/home/chrono/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie -Wl,--fix-cortex-a8' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
   Input #0, wav, from '/storage/emulated/0/IAMDJ/MyLoops/mix folder/Test.wav':
  
     Metadata:
  
       encoder         : Lavf56.25.101
  
     Duration: 00:00:16.01, bitrate: 1411 kb/s
  
       Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
  
   Output #0, ogg, to '/storage/emulated/0/Test.ogg':
  
     Metadata:
  
       encoder         : Lavf56.25.101
  
       Stream #0:0: Audio: vorbis (libvorbis), 44100 Hz, stereo, fltp
  
    Metadata:
  
        encoder         : Lavc56.26.100 libvorbis
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> vorbis (libvorbis))
  
  Press [q] to stop, [?] for help
  
  size=       4kB time=00:00:01.00 bitrate=  35.0kbits/s    
  
  size=      27kB time=00:00:02.01 bitrate= 107.8kbits/s    
  
  size=      48kB time=00:00:03.04 bitrate= 129.3kbits/s    
  
  size=      70kB time=00:00:04.06 bitrate= 140.3kbits/s    
  
  size=      91kB time=00:00:05.14 bitrate= 144.9kbits/s    
  
  size=     113kB time=00:00:06.15 bitrate= 149.7kbits/s    
  
  video:0kB audio:344kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 1.994279%

  Edit : here is the result file : Test.ogg

  Edit 2 : Maybe there can be a problem with standard MediaPlayer but another Ogg file is played correctly.