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• ffmpeg throw a silent video output when trying to merge video and audio

  31 janvier 2023, par porororo

  I tried to combine mp4 format video and wav format audio.
The video is shorter than the audio and start second is same as 00:00.

  


  I used command as bellows :

  


  ffmpeg -i video.mp4 -i audio.wav  -filter_complex "[0:a]volume=0.2[A];[1:a][A]amerge[Aout]" -map 0:v -map [Aout] -y -shortest output_video.mp4


  


  The problem is the output_video.mp4 is a silent video without the sound.

  


  How can I get the output_video.mp4 with sound from audio.wav ?

  


  ffmpeg output is :

  


  

ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7.3.0 (crosstool-NG 1.23.0.449-a04d0)
configuration: --prefix=/tmp/build/80754af9/ffmpeg_1587154242452/\_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho --cc=/tmp/build/80754af9/ffmpeg_1587154242452/\_build_env/bin/x86_64-conda_cos6-linux-gnu-cc --disable-doc --enable-avresample --enable-gmp --enable-hardcoded-tables --enable-libfreetype --enable-libvpx --enable-pthreads --enable-libopus --enable-postproc --enable-pic --enable-pthreads --enable-shared --enable-static --enable-version3 --enable-zlib --enable-libmp3lame --disable-nonfree --enable-gpl --enable-gnutls --disable-openssl --enable-libopenh264 --enable-libx264
libavutil      56. 31.100 / 56. 31.100
libavcodec     58. 54.100 / 58. 54.100
libavformat    58. 29.100 / 58. 29.100
libavdevice    58.  8.100 / 58.  8.100
libavfilter     7. 57.100 /  7. 57.100
libavresample   4.  0.  0 /  4.  0.  0
libswscale      5.  5.100 /  5.  5.100
libswresample   3.  5.100 /  3.  5.100
libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
Metadata:
major_brand     : isom
minor_version   : 512
compatible_brands: isomiso2avc1mp41
encoder         : Lavf58.29.100
Duration: 00:00:19.04, start: 0.000000, bitrate: 510 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 373 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, 128 kb/s (default)
Metadata:
handler_name    : SoundHandler
Guessed Channel Layout for Input Stream #1.0 : mono
Input #1, wav, from 'audio.wav':
Duration: 00:00:14.70, bitrate: 352 kb/s
Stream #1:0: Audio: pcm_s16le (\[1\]\[0\]\[0\]\[0\] / 0x0001), 22050 Hz, mono, s16, 352 kb/s
Stream mapping:
Stream #0:1 (aac) -\> volume (graph 0)
Stream #1:0 (pcm_s16le) -\> amerge:in0 (graph 0)
Stream #0:0 -\> #0:0 (h264 (native) -\> h264 (libx264))
amerge (graph 0) -\> Stream #0:1 (aac)
Press \[q\] to stop, \[?\] for help
\[libx264 @ 0x55aa9a642ac0\] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
\[libx264 @ 0x55aa9a642ac0\] profile High, level 3.1, 4:2:0, 8-bit
\[libx264 @ 0x55aa9a642ac0\] 264 - core 157 - 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=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=22 lookahead_threads=3 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
\[Parsed_amerge_1 @ 0x55aa9b37c140\] No channel layout for input 1
Output #0, mp4, to 'output_video.mp4':
Metadata:
major_brand     : isom
minor_version   : 512
compatible_brands: isomiso2avc1mp41
encoder         : Lavf58.29.100
Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1280x720, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
handler_name    : VideoHandler
encoder         : Lavc58.54.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, 3.0, fltp, 197 kb/s (default)
Metadata:
encoder         : Lavc58.54.100 aac
frame=  507 fps=291 q=-1.0 Lsize=    1116kB time=00:00:16.80 bitrate= 544.3kbits/s speed=9.64x  
video:760kB audio:342kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.242977%
\[libx264 @ 0x55aa9a642ac0\] frame I:3     Avg QP:16.24  size: 19770
\[libx264 @ 0x55aa9a642ac0\] frame P:154   Avg QP:20.29  size:  3227
\[libx264 @ 0x55aa9a642ac0\] frame B:350   Avg QP:19.84  size:   633
\[libx264 @ 0x55aa9a642ac0\] consecutive B-frames:  0.6% 15.8% 18.9% 64.7%
\[libx264 @ 0x55aa9a642ac0\] mb I  I16..4: 23.5% 67.4%  9.1%
\[libx264 @ 0x55aa9a642ac0\] mb P  I16..4:  0.7%  3.0%  0.3%  P16..4: 13.0%  3.1%  1.0%  0.0%  0.0%    skip:78.8%
\[libx264 @ 0x55aa9a642ac0\] mb B  I16..4:  0.2%  0.1%  0.0%  B16..8: 10.4%  0.3%  0.0%  direct: 0.6%  skip:88.3%  L0:41.5% L1:57.2% BI: 1.3%
\[libx264 @ 0x55aa9a642ac0\] 8x8 transform intra:68.2% inter:81.9%
\[libx264 @ 0x55aa9a642ac0\] coded y,uvDC,uvAC intra: 24.6% 22.9% 6.1% inter: 1.2% 1.7% 0.0%
\[libx264 @ 0x55aa9a642ac0\] i16 v,h,dc,p: 68% 16%  6% 10%
\[libx264 @ 0x55aa9a642ac0\] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 10% 50%  2%  2%  3%  2%  4%  3%
\[libx264 @ 0x55aa9a642ac0\] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 25% 13%  5%  5%  6%  5%  6%  4%
\[libx264 @ 0x55aa9a642ac0\] i8c dc,h,v,p: 75% 10% 12%  2%
\[libx264 @ 0x55aa9a642ac0\] Weighted P-Frames: Y:0.0% UV:0.0%
\[libx264 @ 0x55aa9a642ac0\] ref P L0: 65.9% 16.2% 13.5%  4.4%
\[libx264 @ 0x55aa9a642ac0\] ref B L0: 84.1% 13.4%  2.5%
\[libx264 @ 0x55aa9a642ac0\] ref B L1: 97.1%  2.9%
\[libx264 @ 0x55aa9a642ac0\] kb/s:368.24
\[aac @ 0x55aa9a62a280\] Qavg: 8290.713


  


  


  


• Create 1 video using image with length of audio

  19 septembre 2017, par Vishnu

  I am trying to create video with the length of an audio file , and 1 single image as the background for whole video.

  I use following code

  'ffmpeg -y -loop 1 -f image2 -r 24 -i subtitle.jpg  -i audio.mp3 -c:v libx264 -c:a copy -shortest video.flv';

  But problem is processing time is too slow , and sometime video length is not same as audio length.Can some one suggest me alternative ideas.

  p.s : audio length is just 3 to 8 seconds.

  Below is my output

  ffmpeg version N-83443-gc03029a Copyright (c) 2000-2017 the FFmpeg
  developers built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
  configuration : —enable-gpl —enable-version3 —enable-libfdk_aac
  —enable-libmp3lame —enable-libtheora —enable-libvorbis —enable-libvpx —enable-libx264 —enable-nonfree —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libgsm —enable-libxvid —disable-static —enable-shared libavutil 55. 46.100 / 55. 46.100 libavcodec 57. 75.100 / 57. 75.100 libavformat 57. 66.101
  / 57. 66.101 libavdevice 57. 2.100 / 57. 2.100 libavfilter 6. 73.100 /
  6. 73.100 libswscale 4. 3.101 / 4. 3.101 libswresample 2. 4.100 / 2. 4.100 libpostproc 54. 2.100 / 54. 2.100 Input #0, image2, from ’subtitle/1.jpg’ : Duration : 00:00:00.04, start : 0.000000, bitrate : N/A
  Stream #0:0 : Video : mjpeg, yuvj420p(pc, bt470bg/unknown/unknown),
  1280x720 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 24 tbn, 24 tbc [mp3 @
  0x1013ee0] Estimating duration from bitrate, this may be inaccurate
  Input #1, mp3, from ’audio/1.mp3’ : Metadata : encoder : Lavf57.71.100
  Duration : 00:00:05.98, start : 0.000000, bitrate : 32 kb/s Stream #1:0 :
  Audio : mp3, 22050 Hz, mono, s16p, 32 kb/s No pixel format specified,
  yuvj420p for H.264 encoding chosen. Use -pix_fmt yuv420p for
  compatibility with outdated media players. [libx264 @ 0x1020600] using
  SAR=1/1 [libx264 @ 0x1020600] using cpu capabilities : MMX2 SSE2Fast
  SSSE3 SSE4.2 AVX [libx264 @ 0x1020600] profile High, level 3.1
  [libx264 @ 0x1020600] 264 - core 148 r2762 90a61ec - H.264/MPEG-4 AVC
  codec - Copyleft 2003-2017 - 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=3 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=24 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, flv, to ’video/1.flv’ : Metadata : encoder :
  Lavf57.66.101 Stream #0:0 : Video : h264 (libx264) ([7][0][0][0] /
  0x0007), yuvj420p(pc), 1280x720 [SAR 1:1 DAR 16:9], q=-1—1, 24 fps,
  1k tbn, 24 tbc Metadata : encoder : Lavc57.75.100 libx264 Side data :
  cpb : bitrate max/min/avg : 0/0/0 buffer size : 0 vbv_delay : -1 Stream

  0:1 : Audio : mp3 ([2][0][0][0] / 0x0002), 22050 Hz, mono, s16p, 32 kb/s Stream mapping : Stream #0:0 -> #0:0 (mjpeg (native) -> h264

  (libx264)) Stream #1:0 -> #0:1 (copy) Press [q] to stop, [?] for help
  [image2 @ 0x1011680] Thread message queue blocking ; consider raising
  the thread_queue_size option (current value : 8) frame= 32 fps=0.0
  q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x frame= 53 fps=
  51 q=28.0 size= 210kB time=00:00:00.13 bitrate=13157.8kbits/s
  speed=0.126x frame= 73 fps= 47 q=28.0 size= 216kB time=00:00:00.96
  bitrate=1828.9kbits/s speed=0.622x frame= 93 fps= 45 q=28.0 size=
  221kB time=00:00:01.79 bitrate=1009.9kbits/s speed=0.859x frame= 109
  fps= 42 q=28.0 size= 225kB time=00:00:02.45 bitrate= 750.6kbits/s
  speed=0.95x frame= 126 fps= 40 q=28.0 size= 230kB time=00:00:03.16
  bitrate= 594.3kbits/s speed=1.02x frame= 145 fps= 40 q=28.0 size=
  235kB time=00:00:03.95 bitrate= 485.7kbits/s speed=1.09x frame= 162
  fps= 39 q=28.0 size= 239kB time=00:00:04.67 bitrate= 419.3kbits/s
  speed=1.12x frame= 181 fps= 39 q=28.0 size= 244kB time=00:00:05.46
  bitrate= 366.5kbits/s speed=1.17x frame= 193 fps= 33 q=28.0 Lsize=
  248kB time=00:00:05.95 bitrate= 340.4kbits/s speed=1.03x video:217kB
  audio:23kB subtitle:0kB other streams:0kB global headers:0kB muxing
  overhead : 2.834417% [libx264 @ 0x1020600] frame I:1 Avg QP:17.19
  size:212155 [libx264 @ 0x1020600] frame P:48 Avg QP:18.02 size : 140
  [libx264 @ 0x1020600] frame B:144 Avg QP:27.33 size : 43 [libx264 @
  0x1020600] consecutive B-frames : 0.5% 0.0% 0.0% 99.5% [libx264 @
  0x1020600] mb I I16..4 : 3.1% 86.8% 10.2% [libx264 @ 0x1020600] mb P
  I16..4 : 0.0% 0.0% 0.0% P16..4 : 1.0% 0.0% 0.0% 0.0% 0.0% skip:99.0%
  [libx264 @ 0x1020600] mb B I16..4 : 0.0% 0.0% 0.0% B16..8 : 0.1% 0.0%
  0.0% direct : 0.0% skip:99.8% L0 : 9.1% L1:90.9% BI : 0.0% [libx264 @ 0x1020600] 8x8 transform intra:82.0% inter:55.7% [libx264 @ 0x1020600]
  coded y,uvDC,uvAC intra : 87.6% 80.7% 62.5% inter : 0.0% 0.2% 0.0%
  [libx264 @ 0x1020600] i16 v,h,dc,p : 76% 22% 2% 1% [libx264 @
  0x1020600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu : 11% 15% 24% 7% 9% 7% 10% 6%
  10% [libx264 @ 0x1020600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu : 23% 27% 9% 7%
  8% 6% 8% 5% 8% [libx264 @ 0x1020600] i8c dc,h,v,p : 55% 23% 14% 8%
  [libx264 @ 0x1020600] Weighted P-Frames : Y:0.0% UV:0.0% [libx264 @
  0x1020600] ref P L0 : 95.1% 0.1% 3.2% 1.6% [libx264 @ 0x1020600] ref B
  L0 : 91.7% 3.3% 5.0% [libx264 @ 0x1020600] ref B L1 : 86.1% 13.9%
  [libx264 @ 0x1020600] kb/s:223.84 0

• Blank video as the result of converting from bmp ffmpeg [duplicate]

  1er juin 2021, par Артур Клочко

  ---

  


  Update

  


  I'm sorry, as I wrote I tried to play video via different variants and got nothing, but now I send it to myself via Telegram app, and it displays there correctly. It plays via Chrome also. Seems it is not the ffmpeg problem.

  


  I uploaded it to my site, if you are not aware, please check it via stupid uwp app or Windows Media player if you are using Windows, and if you have the same problem, please feedback and I will report it as a bug

  


  https://okumaima.com/cave.mp4

  


  ---

  


  Recently I have been using ffmpeg to convert jpg file set to mp4, and it was successfully. I used the next .bat file to do it :

  


  ffmpeg -framerate 60 -i out\%%d.jpg render.mp4


  


  Now, I am trying to do the same, but with bmp files, generated as screenshots using WinApi. Images as themselves are absolutely correct - I can open them via photos app, or anything else. Images resolution is constant and equals 2002x773.

  


  So now I am using the same .bat to make video :

  


  ffmpeg -framerate 60 -i out\%%d.bmp render.mp4


  


  It generates a tiny-size video (17 kb, for 10 bmp images, 5 mb each), that is opening by UWP video app or Windows Media program, but nothing is happening - no errors, yet no video length. If there are more images, the result video size also increases, but the video still doesn't play.

  


  Full output from ffmpeg :

  


  ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20200122
  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. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, image2, from 'rnd\%d.bmp':
  Duration: 00:00:00.17, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: bmp, bgra, 2002x773, 60 tbr, 60 tbn, 60 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (bmp (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 052fed40] using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2
[libx264 @ 052fed40] profile High 4:4:4 Predictive, level 4.2, 4:4:4, 8-bit
[libx264 @ 052fed40] 264 - core 159 - 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=4 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
Output #0, mp4, to 'caev.mp4':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 2002x773, q=-1--1, 60 fps, 15360 tbn, 60 tbc
    Metadata:
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame=   10 fps=0.0 q=-1.0 Lsize=      16kB time=00:00:00.11 bitrate=1142.4kbits/s speed=0.151x
video:15kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.097639%
[libx264 @ 052fed40] frame I:1     Avg QP:18.80  size:  6840
[libx264 @ 052fed40] frame P:4     Avg QP:25.73  size:  1517
[libx264 @ 052fed40] frame B:5     Avg QP:35.54  size:   426
[libx264 @ 052fed40] consecutive B-frames: 20.0% 40.0%  0.0% 40.0%
[libx264 @ 052fed40] mb I  I16..4: 21.1% 76.3%  2.6%
[libx264 @ 052fed40] mb P  I16..4:  0.6%  0.3%  0.3%  P16..4:  0.9%  0.6%  0.1%  0.0%  0.0%    skip:97.0%
[libx264 @ 052fed40] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  4.0%  0.2%  0.0%  direct: 0.0%  skip:95.6%  L0:34.5% L1:64.6% BI: 0.9%
[libx264 @ 052fed40] 8x8 transform intra:73.8% inter:10.2%
[libx264 @ 052fed40] coded y,u,v intra: 1.8% 1.5% 1.5% inter: 0.1% 0.1% 0.1%
[libx264 @ 052fed40] i16 v,h,dc,p: 52% 47%  1%  0%
[libx264 @ 052fed40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 47% 45%  8%  0%  0%  0%  0%  0%  0%
[libx264 @ 052fed40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 31% 32%  3%  0%  1%  2%  5%  2%
[libx264 @ 052fed40] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 052fed40] ref P L0: 75.8%  4.1% 15.8%  4.3%
[libx264 @ 052fed40] ref B L0: 63.5% 34.8%  1.7%
[libx264 @ 052fed40] ref B L1: 97.6%  2.4%
[libx264 @ 052fed40] kb/s:721.78