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• Why ffmpeg concat with 2 videos is losing the 2nd audio ?

  24 janvier 2016, par Damian Marcos

  i am trying to merge videos (with their respective audios), but when trying to concatenate 2 different video sources, the second audio is not played.

  (videos.txt has the 2 videos im trying to concat)

  shell_exec('ffmpeg -f concat -i videos.txt -crf 30 -c:a aac -strict experimental output.mp4');

  Any help will be appreciated !

  Thanks !!

  FFPROBE FOR BOTH FILES :

  ffprobe version N-76417-gee20354 Copyright (c) 2007-2015 the FFmpeg developers
 built with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
 configuration: --prefix=/home/dmarcos89/ffmpeg_build --extra-cflags=-I/home/dmarcos89/ffmpeg_build/include --extra-ldflags=-L/home/dmarcos89/ffmpeg_build/lib --bindir=/usr/local/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
 libavutil      55.  5.100 / 55.  5.100
 libavcodec     57. 13.102 / 57. 13.102
 libavformat    57. 13.100 / 57. 13.100
 libavdevice    57.  0.100 / 57.  0.100
 libavfilter     6. 14.101 /  6. 14.101
 libswscale      4.  0.100 /  4.  0.100
 libswresample   2.  0.100 /  2.  0.100
 libpostproc    54.  0.100 / 54.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 't1.mp4':
 Metadata:
   major_brand     : isom
   minor_version   : 512
   compatible_brands: isomiso2avc1mp41
   encoder         : Lavf57.13.100
 Duration: 00:00:10.14, start: 0.042667, bitrate: 1343 kb/s
   Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1183 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
   Metadata:
     handler_name    : VideoHandler
   Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 161 kb/s (default)
   Metadata:
     handler_name    : SoundHandler
ffprobe version N-76417-gee20354 Copyright (c) 2007-2015 the FFmpeg developers
 built with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
 configuration: --prefix=/home/dmarcos89/ffmpeg_build --extra-cflags=-I/home/dmarcos89/ffmpeg_build/include --extra-ldflags=-L/home/dmarcos89/ffmpeg_build/lib --bindir=/usr/local/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
 libavutil      55.  5.100 / 55.  5.100
 libavcodec     57. 13.102 / 57. 13.102
 libavformat    57. 13.100 / 57. 13.100
 libavdevice    57.  0.100 / 57.  0.100
 libavfilter     6. 14.101 /  6. 14.101
 libswscale      4.  0.100 /  4.  0.100
 libswresample   2.  0.100 /  2.  0.100
 libpostproc    54.  0.100 / 54.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 't2.mp4':
 Metadata:
   major_brand     : isom
   minor_version   : 512
   compatible_brands: isomiso2avc1mp41
   encoder         : Lavf57.13.100
 Duration: 00:00:07.32, start: 0.042667, bitrate: 3616 kb/s
   Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 3487 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
   Metadata:
     handler_name    : VideoHandler
   Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 160 kb/s (default)
   Metadata:
     handler_name    : SoundHandler

  And this is the start of the output message after trying to concat (the entire output is very large and repeats ’Error while decoding stream #0:1 : Invalid data...’ :

  `

  Input #0, concat, from 'videos.txt':
  
    Duration: N/A, start: 0.000000, bitrate: 1129 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 639 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 490 kb/s
  
      Metadata:
  
        handler_name    : SoundHandler
  
  [libx264 @ 0x2dd3540] using SAR=1/1
  
  [libx264 @ 0x2dd3540] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX XOP FMA4 SSEMisalign LZCNT
  
  [libx264 @ 0x2dd3540] profile High, level 3.1
  
  [libx264 @ 0x2dd3540] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - 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=24 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=30.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf57.13.100
  
      Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.13.102 libx264
  
      Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, 5.1, fltp, 128 kb/s
  
      Metadata:
  
        handler_name    : SoundHandler
  
        encoder         : Lavc57.13.102 aac
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  frame=   43 fps=0.0 q=0.0 size=       0kB time=00:00:02.28 bitrate=   0.2kbits/s dup=1 drop=0    
  
  frame=   80 fps= 80 q=35.0 size=      44kB time=00:00:03.75 bitrate=  96.0kbits/s dup=1 drop=0    
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0xa559a80] Auto-inserting h264_mp4toannexb bitstream filter
  
  [aac @ 0x2daa540] channel element 1.0 is not allocated
  
  Error while decoding stream #0:1: Invalid data found when processing input

  `

• fastest ffmpeg without caring about quality

  31 mai 2019, par RedDeath

  I would like to convert any video into .mp4 as fast as possible without caring about quality loss. I have used the next commands with which I have been able to finish the process in 37 seconds for a 10 second video.

  -vcodec h264
  
  -crf 32
  
  -preset ultrafast

  However 37 seconds is still too long for a 10 seconds video. Is there any improvements that I can do to the command in order to reduce the execution time ?

  ---

  Edit (Extra info) :

  I’m using FFmpeg Android (implementation 'com.writingminds:FFmpegAndroid:0.3.2') even though commands usually work for any FFmpeg (with a few variants depending on the FFmpeg version).

  The command used in my case which gave me the fastest result so far is :

      mFfmpeg.execute(
  
          arrayOf(
  
              "-i" , videoCopy?.path,
  
              "-vcodec", "h264",
  
              "-crf", "32",
  
              "-preset", "ultrafast",
  
              "-y", uploadFile?.path), 
  
          object : ExecuteBinaryResponseHandler() { ... }

  Which for regular FFmpeg command would be

  "-ffmpeg -i {video?.path} -vcodec h264 -crf 32 -preset ultrafast -y {uploadFile?.path}"

  Where video is my original video File and uploadFile is the File where I want to save the result into.

  In a Samsung J3 (SM-J320M, you can find its specifications online) such command takes the aforementioned 37 seconds.

  After executing such command the first onProgress message returned by FFmpeg prints :

  ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers  built with gcc 4.8 (GCC)  
  
  configuration: 
  
      --target-os=linux 
  
      --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- 
  
      --arch=arm 
  
      --cpu=cortex-a8 
  
      --enable-runtime-cpudetect 
  
      --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot 
  
      --enable-pic 
  
      --enable-libx264 
  
      --enable-libass 
  
      --enable-libfreetype 
  
      --enable-libfribidi 
  
      --enable-libmp3lame 
  
      --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/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config 
  
      --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a 
  
      --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' 
  
      --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' 
  
      --extra-libs='-lpng -lexpat -lm' 
  
      --extra-cxxflags=  
  
          libavutil    55. 17.103 / 55. 17.103  
  
          libavcodec    57. 24.102 / 57. 24.102
  
          libavformat    57. 25.100 / 57. 25.100  
  
          libavdevice    57.  0.101 / 57.  0.101  
  
          libavfilter    6. 31.100 /  6. 31.100  
  
          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 '/storage/emulated/0/DCIM/Yakatak/656.mp4':  Metadata:    major_brand     : mp42    minor_version   : 0    compatible_brands: isommp42    creation_time   : 2019-05-29 11:27:56    location        : +51.5202-000.1435/    location-eng    : +51.5202-000.1435/  Duration: 00:00:09.47, start: 0.000000, bitrate: 12147 kb/s    Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 11899 kb/s, 30.02 fps, 30 tbr, 90k tbn, 180k tbc (default)    Metadata:      rotate          : 90      creation_time   : 2019-05-29 11:27:56      handler_name    : VideoHandle    Side data:      displaymatrix: rotation of -90.00 degrees    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s (default)    Metadata:      creation_time   : 2019-05-29 11:27:56      handler_name    : SoundHandle[libx264 @ 0xb5428800] using cpu capabilities: none![libx264 @ 0xb5428800] profile Constrained Baseline, level 3.1[libx264 @ 0xb5428800] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=6 lookahead_threads=1 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=32.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  
  
  
  Output #0, mp4, to '/storage/emulated/0/DCIM/Yakatak/uploadFile.mp4':  Metadata:    major_brand     : mp42    minor_version   : 0    compatible_brands: isommp42    location-eng    : +51.5202-000.1435/    location        : +51.5202-000.1435/    encoder         : Lavf57.25.100    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 720x1280, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)    Metadata:      handler_name    : VideoHandle      creation_time   : 2019-05-29 11:27:56      encoder         : Lavc57.24.102 libx264    Side data:      unknown side data type 10 (24 bytes)    Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s (default)    Metadata:      creation_time   : 2019-05-29 11:27:56      handler_name    : SoundHandle      encoder         : Lavc57.24.102 aacStream mapping:  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))  Stream #0:1 -> #0:1 (aac (native) -> aac (native))Press [q] to stop, [?] for helpframe=    0 fps=0.0

• FFMPEG encrypted HLS single file is unplayable

  17 septembre 2019, par 3bodyZZ

  i use this command to generate the byterange segments

  ffmpeg -i test.mp4 -hls_time 20 -hls_flags single_file -hls_key_info_file key_info out.m3u8
  here is the output m3u8

  #EXTM3U
  
  #EXT-X-VERSION:4
  
  #EXT-X-TARGETDURATION:24
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-KEY:METHOD=AES-128,URI="key.bin"
  
  #EXTINF:23.933333,
  
  #EXT-X-BYTERANGE:1016328@0
  
  out.ts
  
  #EXTINF:19.200000,
  
  #EXT-X-BYTERANGE:824192@1016328
  
  out.ts
  
  #EXTINF:16.866667,
  
  #EXT-X-BYTERANGE:714024@1840520
  
  out.ts
  
  #EXT-X-ENDLIST

  and it does output incorrect byte range m3u8 file that is unplayable, i have tried the multiple segments and it works just fine but i need the single file, any one knows how to fix this ?

  here is the logs from ffmpeg

  ffmpeg version N-94167-ga514244319 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.1.1 (GCC) 20190621
  
    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. 30.100 / 56. 30.100
  
    libavcodec     58. 53.101 / 58. 53.101
  
    libavformat    58. 28.101 / 58. 28.101
  
    libavdevice    58.  7.100 / 58.  7.100
  
    libavfilter     7. 56.100 /  7. 56.100
  
    libswscale      5.  4.101 /  5.  4.101
  
    libswresample   3.  4.100 /  3.  4.100
  
    libpostproc    55.  4.100 / 55.  4.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'ttt.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.40.101
  
    Duration: 00:01:00.16, start: 0.000000, bitrate: 227 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 480x320, 157 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 64 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 000001df1e25dd80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 000001df1e25dd80] profile Progressive High, level 2.1, 4:2:0, 8-bit
  
  [libx264 @ 000001df1e25dd80] 264 - core 157 r2970 5493be8 - 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=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
  
  [hls @ 000001df1e25ac80] Opening 'key_info' for reading
  
  [hls @ 000001df1e25ac80] Opening 'key.bin' for reading
  
  [hls @ 000001df1e25ac80] Opening 'crypto:out.ts' for writing
  
  Output #0, hls, to 'out.m3u8':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.28.101
  
      Stream #0:0(und): Video: h264 (libx264), yuv420p, 480x320, q=-1--1, 30 fps, 90k tbn, 30 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
        encoder         : Lavc58.53.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1(und): Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
        encoder         : Lavc58.53.101 aac
  
  [hls @ 000001df1e25ac80] Opening 'out.m3u8.tmp' for writinge=N/A speed=25.4x
  
  [hls @ 000001df1e25ac80] Opening 'out.m3u8.tmp' for writinge=N/A speed=23.8x
  
  [hls @ 000001df1e25ac80] Opening 'out.m3u8.tmp' for writinge=N/A speed=23.7x
  
  frame= 1800 fps=723 q=-1.0 Lsize=N/A time=00:01:00.11 bitrate=N/A speed=24.1x
  
  video:1196kB audio:947kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  [libx264 @ 000001df1e25dd80] frame I:25    Avg QP:18.20  size: 18883
  
  [libx264 @ 000001df1e25dd80] frame P:524   Avg QP:21.64  size:  1174
  
  [libx264 @ 000001df1e25dd80] frame B:1251  Avg QP:30.70  size:   109
  
  [libx264 @ 000001df1e25dd80] consecutive B-frames:  4.2%  7.6%  5.8% 82.4%
  
  [libx264 @ 000001df1e25dd80] mb I  I16..4: 29.1%  8.6% 62.3%
  
  [libx264 @ 000001df1e25dd80] mb P  I16..4:  1.1%  0.8%  1.1%  P16..4: 14.6%  3.7%  2.2%  0.0%  0.0%    skip:76.5%
  
  [libx264 @ 000001df1e25dd80] mb B  I16..4:  0.0%  0.0%  0.1%  B16..8:  7.1%  0.5%  0.1%  direct: 0.2%  skip:92.0%  L0:47.1% L1:51.6% BI: 1.3%
  
  [libx264 @ 000001df1e25dd80] 8x8 transform intra:15.8% inter:36.0%
  
  [libx264 @ 000001df1e25dd80] coded y,uvDC,uvAC intra: 47.5% 75.5% 54.9% inter: 1.7% 4.4% 0.7%
  
  [libx264 @ 000001df1e25dd80] i16 v,h,dc,p: 48% 45%  5%  2%
  
  [libx264 @ 000001df1e25dd80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 20% 48%  2%  2%  1%  2%  2%  3%
  
  [libx264 @ 000001df1e25dd80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 27% 12%  7%  6%  5%  6%  5%  6%
  
  [libx264 @ 000001df1e25dd80] i8c dc,h,v,p: 34% 37% 21%  7%
  
  [libx264 @ 000001df1e25dd80] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 000001df1e25dd80] ref P L0: 83.5%  4.4%  9.5%  2.6%
  
  [libx264 @ 000001df1e25dd80] ref B L0: 90.1%  8.9%  1.0%
  
  [libx264 @ 000001df1e25dd80] ref B L1: 95.4%  4.6%
  
  [libx264 @ 000001df1e25dd80] kb/s:163.19
  
  [aac @ 000001df1e2138c0] Qavg: 357.178

  i have also tried different videos, and i have tried ffmpeg on windows and linux , i have tried compiling it myself and nothing seems to work the segments keeps repeating after reaching a certain point in the video