Answers.Body: <p>I have got the solution here:</p>
  <p><a href="https://stackoverflow.com/questions/63488697/ffmpeg-command-execution-never-stops/63490769?noredirect=1#comment112272999_63490769">https://stackoverflow.com/questions/63488697/ffmpeg-command-execution-never-stops/63490769?noredirect=1#comment112272999_63490769</a></p>
  <p>I had to add <code>-vsync 0</code> to prevent frame duplication.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-08-22T15:30:13.650Z
Answers.LastActivityDate: 2020-08-22T15:30:13.650Z
Answers.UserDisplayName: Khawar Raza
Body: <p>I am trying to concatenate 3 videos of different resolutions and overlaying 2 videos as transition effects(though the chroma key color removal is not yet implemented) between videos using below command:</p>
  <pre><code>ffmpeg 
  -i input1.mp4 
  -i input2.mp4 
  -i input3.mp4 
  -i transition1.mp4 
  -i transition2.mp4 
  -filter_complex 
  &quot;[0:v]pad=width=1080:height=1920:x=(1080-iw)*0.5:y=(1920-ih)*0.5:color=black[video0];
  [1:v]pad=width=1080:height=1920:x=(1080-iw)*0.5:y=(1920-ih)*0.5:color=black[video1];
  [2:v]pad=width=1080:height=1920:x=(1080-iw)*0.5:y=(1920-ih)*0.5:color=black[video2];
  [video0][video1][video2]concat=n=3:v=1:a=0[outv];
  [3:v]scale=w=1080:h=1920[t0];
  [4:v]scale=w=1080:h=1920[t1];
  [outv][t0]overlay=enable='between(t,6.6045,9.6335)'[out0];
  [out0][t1]overlay=enable='between(t,12.5655,15.6165)'[out1];
  [0:a][1:a][2:a]concat=n=3:v=0:a=1[audio]&quot; 
  -c:v libx264 -pix_fmt yuv420p -map [out1] -map [audio] -preset ultrafast output.mp4
  </code></pre>
  <p>I get success only with few videos. Most of the times the command execution never stops. It keeps on appending something to the output video file even for hours. Here is the output from console:</p>
  <pre><code>ffmpeg version v4.4-dev-416
       Copyright (c) 2000-2020 the FFmpeg developers
        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=aarch64-linux-android- --sysroot=/files/android-sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm64/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8-a --cc=aarch64-linux-android24-clang --cxx=aarch64-linux-android24-clang++ --extra-libs='-L/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm64/cpu-features/lib -lndk_compat' --target-os=android --enable-neon --enable-asm --enable-inline-asm --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-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-mediacodec
        libavutil      56. 55.100 / 56. 55.100
        libavcodec     58. 96.100 / 58. 96.100
        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
        libswresample   3.  8.100 /  3.  8.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input1.mp4':
        Metadata:
          major_brand     : 
      mp42
          minor_version   : 
      0
          compatible_brands: 
  isommp42
          creation_time   : 
      2020-08-12T17:21:49.000000Z
          com.android.version: 
      9
        Duration: 
      00:00:08.12
      , start: 
      0.000000
      , bitrate: 
      17298 kb/s
          Stream #0:0
      (eng)
      : Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 16309 kb/s
      , SAR 1:1 DAR 16:9
      , 
      28.70 fps, 
      29.50 tbr, 
      90k tbn, 
      60 tbc
       (default)
          Metadata:
            rotate          : 
      90
            creation_time   : 
  
            handler_name    : 
      VideoHandle
          Side data:
            
      displaymatrix: rotation of -90.00 degrees
          Stream #0:1
      (eng)
      : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 192 kb/s
       (default)
          Metadata:
            creation_time   : 
      2020-08-12T17:21:49.000000Z
            handler_name    : 
      SoundHandle
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'input2.mp4':
        Metadata:
          major_brand     : 
      isom
          minor_version   : 
      512
          compatible_brands: 
      isomiso2avc1mp41
     encoder         : 
      Lavf57.25.100
        Duration: 
      00:00:05.97
      , start: 
      0.000000
      , bitrate: 
      770 kb/s
          Stream #1:0
      (und)
      : Audio: aac (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 128 kb/s
       (default)
          Metadata:
            handler_name    : 
      SoundHandler
          Stream #1:1
      (und)
      : Video: h264 (avc1 / 0x31637661), yuv420p, 368x480, 608 kb/s
      , 
      27.29 fps, 
  120 tbr, 
      12k tbn, 
      60 tbc
       (default)
          Metadata:
            handler_name    : 
      VideoHandler
  Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'input3.mp4':
        Metadata:
          major_brand     : 
      isom
          minor_version   : 
      512
      compatible_brands: 
      isomiso2avc1mp41
          encoder         : 
      Lavf55.19.104
        Duration: 
      00:00:13.05
      , start: 
      0.000000
      , bitrate: 
      2453 kb/s
          Chapter #2:0: 
      start 0.000000, 
      end 13.033000
          Metadata:
            title           : 
          Stream #2:0
      (und)
      : Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
       (default)
          Metadata:
            handler_name    : 
      SoundHandler
          Stream #2:1
      (und)
  : Video: h264 (avc1 / 0x31637661), yuv420p, 640x480, 2320 kb/s
      , 
      25 fps, 
      25 tbr, 
      1200k tbn, 
      50 tbc
       (default)
          Metadata:
            handler_name    : 
      VideoHandler
          Stream #2:2
      (eng)
      : Data: bin_data (text / 0x74786574), 0 kb/s
          Metadata:
            handler_name    : 
      SubtitleHandler
  Input #3, mov,mp4,m4a,3gp,3g2,mj2, from 'transition1.mp4':
        Metadata:
          major_brand     : 
      mp42
          minor_version   : 
      0
          compatible_brands: 
      mp41isom
      creation_time   : 
      2020-08-17T09:31:23.000000Z
        Duration: 
      00:00:03.03
      , start: 
      0.000000
      , bitrate: 
      6263 kb/s
          Stream #3:0
      (und)
      : Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 6307 kb/s
      , 
      30 fps, 
      30 tbr, 
      30k tbn, 
      60 tbc
       (default)
          Metadata:
            creation_time   : 
  
            handler_name    : 
      VideoHandler
            encoder         : 
      AVC Coding
          Stream #3:1
      (und)
      : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 79 kb/s
       (default)
          Metadata:
            creation_time   : 
      2020-08-17T09:31:23.000000Z
            handler_name    : 
  SoundHandler
  Input #4, mov,mp4,m4a,3gp,3g2,mj2, from 'transition2.mp4':
        Metadata:
          major_brand     : 
      mp42
          minor_version   : 0
          compatible_brands: 
      mp41isom
          creation_time   : 
      2020-08-17T09:30:33.000000Z
        Duration: 
      00:00:03.05
      , start: 
      0.000000
      , bitrate: 
      7828 kb/s
          Stream #4:0
      (und)
      : Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 7873 kb/s
      , 
      30 fps, 
  30 tbr, 
      30k tbn, 
      60 tbc
       (default)
          Metadata:
            creation_time   : 
      2020-08-17T09:30:33.000000Z
            handler_name    : 
      VideoHandler
            encoder         : 
      AVC Coding
          Stream #4:1
      (und)
      : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 79 kb/s
       (default)
          Metadata:
            creation_time   : 
      2020-08-17T09:30:33.000000Z
            handler_name    : 
      SoundHandler
  Stream mapping:
        Stream #0:0 (h264) -&gt; pad
        Stream #0:1 (aac) -&gt; concat:in0:a0
  Stream #1:0 (aac) -&gt; concat:in1:a0
        Stream #1:1 (h264) -&gt; pad
        Stream #2:0 (aac) -&gt; concat:in2:a0
        Stream #2:1 (h264) -&gt; pad
        Stream #3:0 (h264) -&gt; scale
        Stream #4:0 (h264) -&gt; scale
        overlay
       -&gt; Stream #0:0 (libx264)
        concat
       -&gt; Stream #0:1 (aac)
      Press [q] to stop, [?] for help
  
  [graph 0 input from stream 0:0 @ 0x733a19a900] sws_param option is deprecated and ignored
      [graph 0 input from stream 1:1 @ 0x733a19aa80] sws_param option is deprecated and ignored
      [graph 0 input from stream 2:1 @ 0x733a19ab40] sws_param option is deprecated and ignored
      [graph 0 input from stream 3:0 @ 0x733a19ac00] sws_param option is deprecated and ignored
      [graph 0 input from stream 4:0 @ 0x733a19acc0] sws_param option is deprecated and ignored
  
  [mp4 @ 0x733a679400] Frame rate very high for a muxer not efficiently supporting it.
      Please consider specifying a lower framerate, a different muxer or -vsync 2
  [libx264 @ 0x733a1b0600] using SAR=1/1
  [libx264 @ 0x733a1b0600] MB rate (8160000000) &gt; level limit (16711680)
  [libx264 @ 0x733a1b0600] using cpu capabilities: ARMv8 NEON
  [libx264 @ 0x733a1b0600] profile Constrained Baseline, level 6.2, 4:2:0, 8-bit
      [libx264 @ 0x733a1b0600] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  Output #0, mp4, to 'output.mp4':
        Metadata:
          major_brand     : 
      mp42
  minor_version   : 
      0
          compatible_brands: 
      isommp42
          com.android.version: 
      9
          encoder         : 
      Lavf58.48.100
          Chapter #0:0: 
      start 0.000000, 
      end 13.033000
          Metadata:
            title           : 
          Stream #0:0
      : Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1080x1920 [SAR 1:1 DAR 9:16], q=-1--1
      , 
      1000k tbn, 
      1000k tbc
  (default)
          Metadata:
            encoder         : 
      Lavc58.96.100 libx264
          Side data:
            
      cpb: 
      bitrate max/min/avg: 0/0/0 buffer size: 0 
      vbv_delay: N/A
          Stream #0:1
      : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
       (default)
          Metadata:
            encoder         : 
      Lavc58.96.100 aac
  E/Progress: Progress: 3.6918316
  D/mobile-ffmpeg: Progress: frame: 1, time: 1002, Pct: 0.036918
  frame=    1 fps=0.0 q=0.0 size=       0kB time=00:00:01.00 bitrate=   0.5kbits/s speed=1.79x    
  More than 1000 frames duplicated
  </code></pre>
  <p>I even tried command without overlay and audio parts but result was same. I am working on Android app and using below ffmpeg wrapper library:</p>
  <p><a href="https://github.com/tanersener/mobile-ffmpeg" rel="nofollow noreferrer">https://github.com/tanersener/mobile-ffmpeg</a></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-08-22T15:30:39.550Z
Comments.Text: I have answered my own question.
Comments.UserDisplayName: Khawar Raza
Tags: <ffmpeg>
Title: ffmpeg command execution never stops
UserDisplayName: Khawar Raza
ThreadText: # ffmpeg command execution never stops
  
  (Asked by: username_0 on 2020-08-19)
  
  I am trying to concatenate 3 videos of different resolutions and overlaying 2 videos as transition effects(though the chroma key color removal is not yet implemented) between videos using below command:
  
  ```
  ffmpeg 
  -i input1.mp4 
  -i input2.mp4 
  -i input3.mp4 
  -i transition1.mp4 
  -i transition2.mp4 
  -filter_complex 
  "[0:v]pad=width=1080:height=1920:x=(1080-iw)*0.5:y=(1920-ih)*0.5:color=black[video0];
  [1:v]pad=width=1080:height=1920:x=(1080-iw)*0.5:y=(1920-ih)*0.5:color=black[video1];
  [2:v]pad=width=1080:height=1920:x=(1080-iw)*0.5:y=(1920-ih)*0.5:color=black[video2];
  [video0][video1][video2]concat=n=3:v=1:a=0[outv];
  [3:v]scale=w=1080:h=1920[t0];
  [4:v]scale=w=1080:h=1920[t1];
  [outv][t0]overlay=enable='between(t,6.6045,9.6335)'[out0];
  [out0][t1]overlay=enable='between(t,12.5655,15.6165)'[out1];
  [0:a][1:a][2:a]concat=n=3:v=0:a=1[audio]" 
  -c:v libx264 -pix_fmt yuv420p -map [out1] -map [audio] -preset ultrafast output.mp4
  
  ```
  
  I get success only with few videos. Most of the times the command execution never stops. It keeps on appending something to the output video file even for hours. Here is the output from console:
  
  ```
  ffmpeg version v4.4-dev-416
       Copyright (c) 2000-2020 the FFmpeg developers
        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=aarch64-linux-android- --sysroot=/files/android-sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm64/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8-a --cc=aarch64-linux-android24-clang --cxx=aarch64-linux-android24-clang++ --extra-libs='-L/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm64/cpu-features/lib -lndk_compat' --target-os=android --enable-neon --enable-asm --enable-inline-asm --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-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-mediacodec
        libavutil      56. 55.100 / 56. 55.100
        libavcodec     58. 96.100 / 58. 96.100
        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
        libswresample   3.  8.100 /  3.  8.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input1.mp4':
        Metadata:
          major_brand     : 
      mp42
          minor_version   : 
      0
          compatible_brands: 
  isommp42
          creation_time   : 
      2020-08-12T17:21:49.000000Z
          com.android.version: 
      9
        Duration: 
      00:00:08.12
      , start: 
      0.000000
      , bitrate: 
      17298 kb/s
          Stream #0:0
      (eng)
      : Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 16309 kb/s
      , SAR 1:1 DAR 16:9
      , 
      28.70 fps, 
      29.50 tbr, 
      90k tbn, 
      60 tbc
       (default)
          Metadata:
            rotate          : 
      90
            creation_time   : 
  
            handler_name    : 
      VideoHandle
          Side data:
            
      displaymatrix: rotation of -90.00 degrees
          Stream #0:1
      (eng)
      : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 192 kb/s
       (default)
          Metadata:
            creation_time   : 
      2020-08-12T17:21:49.000000Z
            handler_name    : 
      SoundHandle
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'input2.mp4':
        Metadata:
          major_brand     : 
      isom
          minor_version   : 
      512
          compatible_brands: 
      isomiso2avc1mp41
     encoder         : 
      Lavf57.25.100
        Duration: 
      00:00:05.97
      , start: 
      0.000000
      , bitrate: 
      770 kb/s
          Stream #1:0
      (und)
      : Audio: aac (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 128 kb/s
       (default)
          Metadata:
            handler_name    : 
      SoundHandler
          Stream #1:1
      (und)
      : Video: h264 (avc1 / 0x31637661), yuv420p, 368x480, 608 kb/s
      , 
      27.29 fps, 
  120 tbr, 
      12k tbn, 
      60 tbc
       (default)
          Metadata:
            handler_name    : 
      VideoHandler
  Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'input3.mp4':
        Metadata:
          major_brand     : 
      isom
          minor_version   : 
      512
      compatible_brands: 
      isomiso2avc1mp41
          encoder         : 
      Lavf55.19.104
        Duration: 
      00:00:13.05
      , start: 
      0.000000
      , bitrate: 
      2453 kb/s
          Chapter #2:0: 
      start 0.000000, 
      end 13.033000
          Metadata:
            title           : 
          Stream #2:0
      (und)
      : Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
       (default)
          Metadata:
            handler_name    : 
      SoundHandler
          Stream #2:1
      (und)
  : Video: h264 (avc1 / 0x31637661), yuv420p, 640x480, 2320 kb/s
      , 
      25 fps, 
      25 tbr, 
      1200k tbn, 
      50 tbc
       (default)
          Metadata:
            handler_name    : 
      VideoHandler
          Stream #2:2
      (eng)
      : Data: bin_data (text / 0x74786574), 0 kb/s
          Metadata:
            handler_name    : 
      SubtitleHandler
  Input #3, mov,mp4,m4a,3gp,3g2,mj2, from 'transition1.mp4':
        Metadata:
          major_brand     : 
      mp42
          minor_version   : 
      0
          compatible_brands: 
      mp41isom
      creation_time   : 
      2020-08-17T09:31:23.000000Z
        Duration: 
      00:00:03.03
      , start: 
      0.000000
      , bitrate: 
      6263 kb/s
          Stream #3:0
      (und)
      : Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 6307 kb/s
      , 
      30 fps, 
      30 tbr, 
      30k tbn, 
      60 tbc
       (default)
          Metadata:
            creation_time   : 
  
            handler_name    : 
      VideoHandler
            encoder         : 
      AVC Coding
          Stream #3:1
      (und)
      : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 79 kb/s
       (default)
          Metadata:
            creation_time   : 
      2020-08-17T09:31:23.000000Z
            handler_name    : 
  SoundHandler
  Input #4, mov,mp4,m4a,3gp,3g2,mj2, from 'transition2.mp4':
        Metadata:
          major_brand     : 
      mp42
          minor_version   : 0
          compatible_brands: 
      mp41isom
          creation_time   : 
      2020-08-17T09:30:33.000000Z
        Duration: 
      00:00:03.05
      , start: 
      0.000000
      , bitrate: 
      7828 kb/s
          Stream #4:0
      (und)
      : Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 7873 kb/s
      , 
      30 fps, 
  30 tbr, 
      30k tbn, 
      60 tbc
       (default)
          Metadata:
            creation_time   : 
      2020-08-17T09:30:33.000000Z
            handler_name    : 
      VideoHandler
            encoder         : 
      AVC Coding
          Stream #4:1
      (und)
      : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 79 kb/s
       (default)
          Metadata:
            creation_time   : 
      2020-08-17T09:30:33.000000Z
            handler_name    : 
      SoundHandler
  Stream mapping:
        Stream #0:0 (h264) -> pad
        Stream #0:1 (aac) -> concat:in0:a0
  Stream #1:0 (aac) -> concat:in1:a0
        Stream #1:1 (h264) -> pad
        Stream #2:0 (aac) -> concat:in2:a0
        Stream #2:1 (h264) -> pad
        Stream #3:0 (h264) -> scale
        Stream #4:0 (h264) -> scale
        overlay
       -> Stream #0:0 (libx264)
        concat
       -> Stream #0:1 (aac)
      Press [q] to stop, [?] for help
  
  [graph 0 input from stream 0:0 @ 0x733a19a900] sws_param option is deprecated and ignored
      [graph 0 input from stream 1:1 @ 0x733a19aa80] sws_param option is deprecated and ignored
      [graph 0 input from stream 2:1 @ 0x733a19ab40] sws_param option is deprecated and ignored
      [graph 0 input from stream 3:0 @ 0x733a19ac00] sws_param option is deprecated and ignored
      [graph 0 input from stream 4:0 @ 0x733a19acc0] sws_param option is deprecated and ignored
  
  [mp4 @ 0x733a679400] Frame rate very high for a muxer not efficiently supporting it.
      Please consider specifying a lower framerate, a different muxer or -vsync 2
  [libx264 @ 0x733a1b0600] using SAR=1/1
  [libx264 @ 0x733a1b0600] MB rate (8160000000) > level limit (16711680)
  [libx264 @ 0x733a1b0600] using cpu capabilities: ARMv8 NEON
  [libx264 @ 0x733a1b0600] profile Constrained Baseline, level 6.2, 4:2:0, 8-bit
      [libx264 @ 0x733a1b0600] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  Output #0, mp4, to 'output.mp4':
        Metadata:
          major_brand     : 
      mp42
  minor_version   : 
      0
          compatible_brands: 
      isommp42
          com.android.version: 
      9
          encoder         : 
      Lavf58.48.100
          Chapter #0:0: 
      start 0.000000, 
      end 13.033000
          Metadata:
            title           : 
          Stream #0:0
      : Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1080x1920 [SAR 1:1 DAR 9:16], q=-1--1
      , 
      1000k tbn, 
      1000k tbc
  (default)
          Metadata:
            encoder         : 
      Lavc58.96.100 libx264
          Side data:
            
      cpb: 
      bitrate max/min/avg: 0/0/0 buffer size: 0 
      vbv_delay: N/A
          Stream #0:1
      : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
       (default)
          Metadata:
            encoder         : 
      Lavc58.96.100 aac
  E/Progress: Progress: 3.6918316
  D/mobile-ffmpeg: Progress: frame: 1, time: 1002, Pct: 0.036918
  frame=    1 fps=0.0 q=0.0 size=       0kB time=00:00:01.00 bitrate=   0.5kbits/s speed=1.79x    
  More than 1000 frames duplicated
  
  ```
  
  I even tried command without overlay and audio parts but result was same. I am working on Android app and using below ffmpeg wrapper library:
  
  <https://github.com/tanersener/mobile-ffmpeg>
  
  **Tags:** ffmpeg
  
  > **Comments:**
  > **username_0**: I have answered my own question.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2020-08-22. Score: 0 | Accepted answer
  
  I have got the solution here:
  
  <https://stackoverflow.com/questions/63488697/ffmpeg-command-execution-never-stops/63490769?noredirect=1#comment112272999_63490769>
  
  I had to add `-vsync 0` to prevent frame duplication.
  
  
  ---
  
  