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• ffmpeg Error while opening enconder for output stream [duplicate]

  4 décembre 2015, par user650922

  This question already has an answer here :

  • FFmpeg : Error occurred while encoding audio stream from ac3 to aac
    
    1 answer
    

  As a testing purpose I am converting .mp4 video to .mp4.

  The error message is "Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height".

  Could someone please help me in finding the reason behind below error.

  Below is my terminal log.

  C:\Users\work\Downloads\ffmpeg-20151130-git-7b11eea-win64-static\ffmpeg-20151130
  
  -git-7b11eea-win64-static\bin
  
  >ffmpeg -i C:\Users\work\Desktop\Esocializ\Sample.mp4 C:\Users\work\Desktop\Esoc
  
  ializ\Sample1.mp4
  
  ffmpeg version N-76957-g7b11eea Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 5.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
  
  enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
  
  ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
  
  able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
  
  ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
  
   --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
  
  e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --
  
  enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55.  9.100 / 55.  9.100
  
    libavcodec     57. 16.101 / 57. 16.101
  
    libavformat    57. 19.100 / 57. 19.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 17.100 /  6. 17.100
  
    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 'C:\Users\work\Desktop\Esocializ\Sample.
  
  mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01 00:00:00
  
      encoder         : Lavf53.24.2
  
    Duration: 00:00:05.31, start: 0.000000, bitrate: 1589 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720
  
  [SAR 1:1 DAR 16:9], 1205 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp,
  
  384 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler
  
  [libx264 @ 000000c07583dde0] using SAR=1/1
  
  [libx264 @ 000000c07583dde0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  [libx264 @ 000000c07583dde0] profile High, level 3.1
  
  [libx264 @ 000000c07583dde0] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC cod
  
  ec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 r
  
  ef=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_pski
  
  p=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 dec
  
  imate=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 @ 000000c0758d6da0] Unable to set encoding parameters
  
  Output #0, mp4, to 'C:\Users\work\Desktop\Esocializ\Sample1.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf53.24.2
  
      Stream #0:0(und): Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9
  
  ], q=-1--1, 25 fps, 25 tbn, 25 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.16.101 libx264
  
      Stream #0:1(und): Audio: aac, 0 channels, 128 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler
  
        encoder         : Lavc57.16.101 libvo_aacenc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
  
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters
  
  such as bit_rate, rate, width or height
  
  
  
  C:\Users\work\Downloads\ffmpeg-20151130-git-7b11eea-win64-static\ffmpeg-20151130
  
  -git-7b11eea-win64-static\bin
  
  >

• Why duration of the mp4 file created with ffmpeg from png files is smaller than expected ?

  17 août 2021, par qwark97

  I'm trying to concatenate a bunch of png files into one mp4 file using ffmpeg. I use following command :

  


  ffmpeg -f concat -i concat.txt -f mp4 out.mp4


  


  The "description file" (concat.txt) looks like this :

  


  file screen_001.png
duration 0.14538311958312988
file screen_002.png
duration 0.11382007598876953
file screen_003.png
duration 2.543360710144043
...
file screen_036.png
duration 0.15303301811218262
file screen_037.png
duration 0.160630464553833
file screen_038.png
duration 3.2751874923706055


  


  Given command works, I'm able to create desired mp4 file. The problem is, the duration of the output file is smaller than sum of the duration lines from concat.txt. I expect mp4 file 22.48s long but I get 19.20s long file.

  


  What am I doing wrong ? Maybe I'm not using some flag I should ? Is it even possible to do what I want ? I'm kind a newbie with ffmpeg and video manipulation at all so any help would be appreciated.

  


  Output of the ffmpeg, maybe will be useful :

  


  root@65181939e08e:/files/tmp# ffmpeg -f concat -i concat.txt -f mp4 out.mp4
ffmpeg version 4.1.6-1~deb10u1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --prefix=/usr --extra-version='1~deb10u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
Input #0, concat, from 'concat.txt':
  Duration: 00:00:22.48, start: 0.000000, bitrate: 0 kb/s
    Stream #0:0: Video: png, rgba(pc), 1366x768, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x5651f1a6e8c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x5651f1a6e8c0] profile High 4:4:4 Predictive, level 3.2, 4:4:4 8-bit
[libx264 @ 0x5651f1a6e8c0] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=12 lookahead_threads=2 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
Output #0, mp4, to 'out.mp4':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1366x768, q=-1--1, 25 fps, 12800 tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.35.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame=  483 fps=199 q=-1.0 Lsize=     258kB time=00:00:19.20 bitrate= 110.2kbits/s dup=445 drop=0 speed=7.89x    
video:252kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.564829%
[libx264 @ 0x5651f1a6e8c0] frame I:5     Avg QP: 7.86  size: 28761
[libx264 @ 0x5651f1a6e8c0] frame P:121   Avg QP:14.58  size:   729
[libx264 @ 0x5651f1a6e8c0] frame B:357   Avg QP:13.34  size:    70
[libx264 @ 0x5651f1a6e8c0] consecutive B-frames:  1.2%  0.0%  1.9% 96.9%
[libx264 @ 0x5651f1a6e8c0] mb I  I16..4: 88.2%  0.0% 11.8%
[libx264 @ 0x5651f1a6e8c0] mb P  I16..4:  1.3%  0.0%  0.3%  P16..4:  0.2%  0.0%  0.0%  0.0%  0.0%    skip:98.1%
[libx264 @ 0x5651f1a6e8c0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.9%  0.0%  0.0%  direct: 0.0%  skip:99.1%  L0:59.4% L1:40.6% BI: 0.0%
[libx264 @ 0x5651f1a6e8c0] coded y,u,v intra: 7.9% 0.7% 1.3% inter: 0.0% 0.0% 0.0%
[libx264 @ 0x5651f1a6e8c0] i16 v,h,dc,p: 81% 18%  1%  0%
[libx264 @ 0x5651f1a6e8c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 28% 22%  2%  3%  3%  3%  3%  3%
[libx264 @ 0x5651f1a6e8c0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x5651f1a6e8c0] ref P L0: 72.5% 11.9% 12.4%  3.1%
[libx264 @ 0x5651f1a6e8c0] ref B L0: 50.4% 48.1%  1.4%
[libx264 @ 0x5651f1a6e8c0] ref B L1: 98.9%  1.1%
[libx264 @ 0x5651f1a6e8c0] kb/s:106.45


  


  Thanks for your help !

  


• How to make my video in landscape mode using ffmpeg

  6 novembre 2019, par Aarwil

  I have four video chats. Somehow I have managed to cut videos into pieces, stored in array then stacked and finally concat the video which is in the youtube link down below. I have used the size in the portrait view is 640*480. But I need to show them in the landscape. Suggest me any ideas.

  Landscape view :
  https://youtu.be/u8tmL2-CdK0
  Portrait view :
  https://youtu.be/lO-Q3I9X8OA

  These are my inputs

  Input #0, matroska,webm, from 'PA473fbf06ed1f952f95c88b9cf22ed0ba_pre.mkv':
 Metadata:
   encoder         : GStreamer matroskamux version 1.8.1.1
   creation_time   : 2019-11-05T06:08:19.000000Z
 Duration: 00:01:05.50, start: 63.041000, bitrate: 30 kb/s
   Stream #0:0(eng): Video: h264 (Baseline), yuvj420p(pc, progressive), 360x480, SAR 1:1 DAR 3:4, 15 tbr, 1k tbn, 2k tbc (default)
   Metadata:
     title           : Video
Input #1, matroska,webm, from 'PA183db0ed986039de3197092103a411eb_pre.mkv':
 Metadata:
   encoder         : GStreamer matroskamux version 1.8.1.1
   creation_time   : 2019-11-05T06:07:20.000000Z
 Duration: 00:03:15.14, start: 4.062000, bitrate: 172 kb/s
   Stream #1:0(eng): Video: h264 (Baseline), yuvj420p(pc, progressive), 360x480, SAR 1:1 DAR 3:4, 15 fps, 15 tbr, 1k tbn, 2k tbc (default)
   Metadata:
     title           : Video
Input #2, matroska,webm, from 'PA62a810038cbcc00be21fac43e98f5ee1_pre.mkv':
 Metadata:
   encoder         : GStreamer matroskamux version 1.8.1.1
   creation_time   : 2019-11-05T06:07:45.000000Z
 Duration: 00:02:21.71, start: 28.803000, bitrate: 92 kb/s
   Stream #2:0(eng): Video: h264 (Baseline), yuvj420p(pc, progressive), 360x480, SAR 1:1 DAR 3:4, 15 tbr, 1k tbn, 2k tbc (default)
   Metadata:
     title           : Video
Input #3, matroska,webm, from 'PA8fa44ff1ba37ee510a045198bca6f04a_pre.mkv':
 Metadata:
   encoder         : GStreamer matroskamux version 1.8.1.1
   creation_time   : 2019-11-05T06:07:48.000000Z
 Duration: 00:01:50.69, start: 32.318000, bitrate: 28 kb/s
   Stream #3:0(eng): Video: h264 (Baseline), yuvj420p(pc, progressive), 360x480, SAR 1:1 DAR 3:4, 15 fps, 15 tbr, 1k tbn, 2k tbc (default)
   Metadata:
     title           : Video

  At first, I change all the video resolution to 640:480 because each video may have different resolution (probability). So I am setting a fixed resolution.

  ffmpeg -i PA8fa44ff1ba37ee510a045198bca6f04a_pre.mkv -vf scale=640:480 PA8fa44ff1ba37ee510a045198bca6f04a.mkv -hide_banner
Input #0, matroska,webm, from PA8fa44ff1ba37ee510a045198bca6f04a_pre.mkv':
 Metadata:
   encoder         : GStreamer matroskamux version 1.8.1.1
   creation_time   : 2019-11-05T06:07:48.000000Z
 Duration: 00:01:50.69, start: 32.318000, bitrate: 28 kb/s
   Stream #0:0(eng): Video: h264 (Baseline), yuvj420p(pc, progressive), 360x480, SAR 1:1 DAR 3:4, 15 fps, 15 tbr, 1k tbn, 2k tbc (default)
   Metadata:
     title           : Video
Stream mapping:
 Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[swscaler @ 0000021d72eb3f80] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 0000021d72b33b40] using SAR=9/16
[libx264 @ 0000021d72b33b40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0000021d72b33b40] profile High, level 2.2, 4:2:0, 8-bit
[libx264 @ 0000021d72b33b40] 264 - core 158 r2984 3759fcb - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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=15 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
Output #0, matroska, to 'PA8fa44ff1ba37ee510a045198bca6f04a.mkv':
 Metadata:
   encoder         : Lavf58.32.104
   Stream #0:0(eng): Video: h264 (libx264) (H264 / 0x34363248), yuvj420p(pc), 640x480 [SAR 9:16 DAR 3:4], q=-1--1, 15 fps, 1k tbn, 15 tbc (default)
   Metadata:
     title           : Video
     encoder         : Lavc58.56.101 libx264

  Two videos merging command

  ffmpeg
-i ddb97d85-fc21-4fb4-8062-ca2084a48aeb.mkv
-i a8665a5f-fb5e-44cb-a072-070fbe07a14f.mkv
-filter_complex "[0:v][1:v]hstack" 1572934056.mkv

  Three videos merging command

  ffmpeg
-i 16f90447-c8b6-4077-b3b6-4fb2c07e19b5.mkv
-i ef501109-0ee9-4924-8de1-65eb796a4a78.mkv
-i 0b284aa6-4175-472c-aaf6-837412f97f32.mkv
-filter_complex "[1:v]scale=320:-1[left]; [2:v]scale=320:-1[right]; [left][right]hstack[bottom]; [0:v][bottom]vstack" 1572934058.mkv

  Concat Command

  ffmpeg
-i 1572934031.mkv -i 1572934056.mkv -i 1572934058.mkv -i 1572934089.mkv -i 1572934155.mkv -i 1572934169.mkv -i 1572934198.mkv -filter_complex "[0]scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2,fps=fps=30,setsar=1[0v];[1]scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2,fps=fps=30,setsar=1[1v];[2]scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2,fps=fps=30,setsar=1[2v];[3]scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2,fps=fps=30,setsar=1[3v];[4]scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2,fps=fps=30,setsar=1[4v];[5]scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2,fps=fps=30,setsar=1[5v];[6]scale=640:480:force_original_aspect_ratio=decrease,pad=640:480:(ow-iw)/2:(oh-ih)/2,fps=fps=30,setsar=1[6v];[0v][1v][2v][3v][4v][5v][6v]concat=n=7:v=1:a=0[v]" -map "[v]" 4c21f002fa76b148c00cc6fbceaa57ee.mp4