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  • FFmpeg pipe input, error while transcoding from WebM to MP4

    7 mai 2022, par saurav

    I am trying to record a video from pipe input using FFMPEG. The pipe input is in WebM format i.e. the video codec is VP8 and the audio codec is OPUS. I am able to save the output video in the WebM format using FFMPEG without any issue. But when I am trying to save it in MP4 format, I am not getting the desired output. Though there are no errors while saving, the output file shows an error with description " This file contains no playable streams !."

    


    These are the options for successfully recording in the WebM format.

    


        '-loglevel', 'debug', '-protocol_whitelist', 'pipe,udp,rtp', 
'-fflags', '+genpts', '-i', 'pipe:0', '-map', '0:v:0', '-c:v', 
'copy', '-map', '0:a:0', '-strict', '-2', '-c:a', 'copy', '-flags',
 '+global_header', '-f', 'webm', 'output.webm'


    


    Here are my ffmpeg options for recording in the MP4 format.

    


        '-thread_queue_size', '4096', '-r', '25', '-i', 'pipe:0', 
    '-c:v', 'libx264', '-preset', 'veryFast', '-pix_fmt', 'yuvj420p', 
    '-acodec', 'aac', "output.mp4"


    


    Console output after executing this command as a subprocess

    


    > ffmpeg::process::data [data:'  libavutil      56. 31.100 / 56. 
31.100\n' + '  libavcodec     58. 54.100 / 58. 54.100\n' + '  
libavformat    58. 29.100 / 58. 29.100\n' + '  libavdevice    58. 
 8.100 / 58.  8.100\n' + '  libavfilter     7. 57.100 /  7. 57.100\n'
 + '  libavresample   4.  0.  0 /  4.  0.  0\n' + '  libswscale 
     5.  5.100 /  5.  5.100\n' + '  libswresample   3.  5.100 /  3.
  5.100\n' + '  libpostproc    55.  5.100 / 55.  5.100\n'] +1ms
> 
> ffmpeg ffmpeg::process::data [data:"Input #0, matroska,webm, from
> 'pipe:0':\n" + '  Metadata:\n' + '    encoder         : Chrome\n' + ' 
> Duration: N/A, start: 0.000000, bitrate: N/A\n' + '    Stream
> #0:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)\n' + ' 
   Stream #0:1(eng): Video: vp8, yuv420p(progressive), 1920x950, SAR 1:1
> DAR 192:95, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)\n' + '   
> Metadata:\n' + '      alpha_mode      : 1\n'] +1s
> 
> 
>  ffmpeg::process::data [data:'Stream mapping:\n' + '  Stream #0:1 ->
> #0:0 (vp8 (native) -> h264 (libx264))\n' + '  Stream #0:0 -> #0:1 
(opus (native) -> aac (native))\n'] +1ms
> 
>    ffmpeg::process::data [data:'[swscaler @ 0x55a63050ddc0] deprecated
> pixel format used, make sure you did set range correctly\n'] +23ms
> 
>   ffmpeg::process::data [data:'[libx264 @ 0x55a630489980] using
> SAR=1/1\n'] +10ms
> 
>   ffmpeg::process::data [data:'[libx264 @ 0x55a630489980] using cpu
> capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2\n'] +0ms
> 
>   ffmpeg::process::data [data:'[libx264 @ 0x55a630489980] profile
> High, level 4.0\n'] +8ms
> 
>   ffmpeg::process::data [data:'[libx264 @ 0x55a630489980] 264 - core
> 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 -
> http://www.videolan.org/x264.html - options: cabac=1 ref=1
> deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00
> mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0
> deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=18
> lookahead_threads=6 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=1 keyint=250
> keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=crf
> mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40
> aq=1:1.00\n'] +1ms
> 
>   ffmpeg::process::data [data:"Output #0, mp4, to 'output.mp4':\n" + '
> Metadata:\n' + '    encoder         : Lavf58.29.100\n' + '    Stream
> #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), 
yuvj420p(pc), 1920x950 [SAR 1:1 DAR 192:95], q=-1--1, 25 fps, 12800 tbn, 25 tbc
> (default)\n' + '    Metadata:\n' + '      alpha_mode      : 1\n' + '  
> encoder         : Lavc58.54.100 libx264\n' + '    Side data:\n' + '   
> cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1\n' + '   
> Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
> stereo, fltp, 128 kb/s (default)\n' + '    Metadata:\n' + '     
> encoder         : Lavc58.54.100 aac\n'] +0ms
> 
> ffmpeg::process::data [data:'frame=   45 fps=0.0 q=28.0 size=      
> 0kB time=00:00:01.87 bitrate=   0.2kbits/s speed=3.48x    \r'] +505ms
> 
> ffmpeg::process::data [data:'frame=   61 fps= 56 q=28.0 size=      
> 0kB time=00:00:02.41 bitrate=   0.2kbits/s speed=2.22x    \r'] +564ms
> 
> ffmpeg::process::data [data:'frame=   76 fps= 48 q=28.0 size=      
> 0kB time=00:00:02.88 bitrate=   0.1kbits/s speed=1.81x    \r'] +492ms


    


    I have a doubt on this output as it may have been causing the issue.

    


    ffmpeg::process::data [data:'[swscaler @ 0x55a63050ddc0] deprecated
 pixel format used, make sure you did set range correctly\n'] +23ms


    


    I hope I have provided enough information about the issue I am facing. Please ask for any other information needed to understand the issue correctly.

    


    I am sure that I am missing some ffmpeg options which is causing this issue. But I am not able to identify them ! Any help in correcting this issue would be greatly appreciated.

    


    Thank you.

    


  • ffmpeg video slideshow only takes first image

    14 décembre 2018, par Erhan

    I wanted to create an .mp4 video with a framerate of 1 fps out of 10 images. I followed https://trac.ffmpeg.org/wiki/Slideshow and got to (my images are in the folder I am running the command from and are name img000.png, img001.png, etc.)

    path_to_ffmpeg\ffmpeg.exe -framerate 1 -i img%03d.png output.mp4

    However only the first image is taken to the video and it only shows one image !

    After trying multiple permutations of -framerate and -r options and positions of the options, I did not recieve any better results.

    Does anyone know what might have gone wrong even in this simple case ? Thanks.

    Full log :

    C:\Users\foo\Documents\path>C:\bar\ffmpeg-4.0.2-win64-static\bin\ffmpeg.ex
    
e -framerate 1 -i img%03d.png output.mp4    
    
ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers    
    
  built with gcc 7.3.1 (GCC) 20180722    
    
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --e    
    
nable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libblur    
    
ay --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-    
    
libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enab    
    
le-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-li    
    
bvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --en    
    
able-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-    
    
libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enabl    
    
e-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enabl    
    
e-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enab    
    
le-dxva2 --enable-avisynth    
    
  libavutil      56. 14.100 / 56. 14.100    
    
  libavcodec     58. 18.100 / 58. 18.100    
    
  libavformat    58. 12.100 / 58. 12.100    
    
  libavdevice    58.  3.100 / 58.  3.100    
    
  libavfilter     7. 16.100 /  7. 16.100    
    
  libswscale      5.  1.100 /  5.  1.100    
    
  libswresample   3.  1.100 /  3.  1.100    
    
  libpostproc    55.  1.100 / 55.  1.100    
    
Input #0, image2, from 'img%03d.png':    
    
  Duration: 00:00:10.00, start: 0.000000, bitrate: N/A    
    
    Stream #0:0: Video: png, rgba(pc), 959x550 [SAR 2834:2834 DAR 959:550], 1 fp    
    
s, 1 tbr, 1 tbn, 1 tbc    
    
File 'output.mp4' already exists. Overwrite ? [y/N] y    
    
Stream mapping:    
    
  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))    
    
Press [q] to stop, [?] for help    
    
[libx264 @ 0000000000611040] using SAR=1/1    
    
[libx264 @ 0000000000611040] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2    
    
AVX FMA3 BMI2 AVX2    
    
[libx264 @ 0000000000611040] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-b    
    
it    
    
[libx264 @ 0000000000611040] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC cod    
    
ec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 r    
    
ef=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_pski    
    
p=1 chroma_qp_offset=4 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 deci    
    
mate=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=1    
    
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 'output.mp4':    
    
  Metadata:    
    
    encoder         : Lavf58.12.100    
    
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 959x550 [SA    
    
R 1:1 DAR 959:550], q=-1--1, 1 fps, 16384 tbn, 1 tbc    
    
    Metadata:    
    
      encoder         : Lavc58.18.100 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=      20kB time=00:00:07.00 bitrate=  23.1kbits    
    
/s speed=68.6x    
    
video:19kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing ov    
    
erhead: 5.046419%    
    
[libx264 @ 0000000000611040] frame I:1     Avg QP: 4.41  size: 14084    
    
[libx264 @ 0000000000611040] frame P:3     Avg QP:12.31  size:   632    
    
[libx264 @ 0000000000611040] frame B:6     Avg QP:19.11  size:   436    
    
[libx264 @ 0000000000611040] consecutive B-frames: 20.0%  0.0%  0.0% 80.0%    
    
[libx264 @ 0000000000611040] mb I  I16..4: 89.7%  0.0% 10.3%    
    
[libx264 @ 0000000000611040] mb P  I16..4:  0.2%  0.0%  0.1%  P16..4:  0.5% 0.1    
    
%  0.1%  0.0%  0.0%    skip:98.9%    
    
[libx264 @ 0000000000611040] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.6%  0.1    
    
%  0.1%  direct: 0.0%  skip:99.1%  L0:22.0% L1:73.7% BI: 4.3%    
    
[libx264 @ 0000000000611040] coded y,u,v intra: 6.1% 2.5% 2.6% inter: 0.2% 0.1%    
    
0.1%    
    
[libx264 @ 0000000000611040] i16 v,h,dc,p: 72% 25%  3%  0%    
    
[libx264 @ 0000000000611040] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 31% 20%  2%  2%    
    
2%  3%  5%  2%    
    
[libx264 @ 0000000000611040] Weighted P-Frames: Y:0.0% UV:0.0%    
    
[libx264 @ 0000000000611040] ref P L0: 65.8%  1.5% 26.5%  6.1%    
    
[libx264 @ 0000000000611040] ref B L0: 77.0% 12.7% 10.3%    
    
[libx264 @ 0000000000611040] ref B L1: 88.6% 11.4%
    
[libx264 @ 0000000000611040] kb/s:14.87

  • FFMPEG, H264 Encoding : If frame size exceeds level limit, does it lead to video encoding failed ?

    4 février 2021, par Nafia Mahjabin

    I want to reencode an mp4 file with h264 encoding.
Run the following command :

    


    


    ffmpeg -i input.mp4 -f mp4 -vcodec h264 -profile:v baseline -level 3.0 -pix_fmt yuv420p -color_range 2 -vf scale=1080:1920 -acodec aac -async 1 output.mp4

    


    


    Process fails saying Video encoding failed.
Error Message given by ffmpeg :

    


    [h264 @ 0x7a467000] Reinit context to 640x1152, pix_fmt: yuv420p\n
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':\n 
 Metadata:\n 
 major_brand     : mp42\n 
   minor_version   : 0\n 
   compatible_brands: mp42mp41iso4\n   
   creation_time   : 2020-07-26T20:32:55.000000Z\n 
   Duration: 00:00:36.20, start: 0.000000, bitrate: 938 kb/s\n 
   Stream #0:0(und): Video: h264, 1 reference frame (avc1 / 0x31637661), yuv420p(left), 640x1138 (640x1152), 935 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)\n 
   Metadata:\n     
   creation_time   : 2020-07-26T20:32:55.000000Z\n    
   handler_name    : Vireo Eyes v2.5.3\n   
   encoder         : AVC Coding\n
   Matched encoder 'libx264' for codec 'h264'.\n
   Stream mapping:\n  
   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))\nPress [q] to stop, [?] for help\n
   [Parsed_scale_0 @ 0x80be6220] w:1080 h:1920 flags:'bicubic' interl:0\n
   [graph 0 input from stream 0:0 @ 0x80be6280] w:640 h:1138 pixfmt:yuv420p tb:1/15360 fr:30/1 sar:0/1\n
   [graph 0 input from stream 0:0 @ 0x80be6280] sws_param option is deprecated and ignored\n[Parsed_scale_0 @ 0x80be6220] w:640 h:1138 fmt:yuv420p sar:0/1 -> w:1080 h:1920 fmt:yuv420p sar:0/1 flags:0x4\n
   [libx264 @ 0x7a1d4000] frame MB size (68x120) > level limit (1620)\n
   [libx264 @ 0x7a1d4000] DPB size (1 frames, 8160 mbs) > level limit (0 frames, 8100 mbs)\n
   [libx264 @ 0x7a1d4000] MB rate (244800) > level limit (40500)\n[libx264 @ 0x7a1d4000] using cpu capabilities: ARMv6 NEON\n
   [libx264 @ 0x7a1d4000] profile Constrained Baseline, level 3.0, 4:2:0, 8-bit\n[libx264 @ 0x7a1d4000] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 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=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\n
   Output #0, mp4, to 'output.mp4':\n 
   Metadata:\n 
   major_brand     : mp42\n   
   minor_version   : 0\n 
   compatible_brands: mp42mp41iso4\n   
   encoder         : Lavf58.48.100\n   
   Stream #0:0(und): Video: h264 (libx264), 1 reference frame (avc1 / 0x31637661), yuv420p(pc, left), 1080x1920, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)\n
   Metadata:\n   
   creation_time   : 2020-07-26T20:32:55.000000Z\n    
   handler_name    : Vireo Eyes v2.5.3\n  
   encoder         : Lavc58.96.100 libx264\n    
   Side data:\n 
   cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A\n
   frame=    3 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \n
   frame=    7 fps=6.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \n
   frame=   11 fps=6.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \n
   frame=   15 fps=6.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \n
   frame=   19 fps=6.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \n
   frame=   23 fps=6.3 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \n
   frame=   26 fps=6.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \n
   frame=   30 fps=6.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \n
   frame=   33 fps=6.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    \n
   Video encoding failed\n[AVIOContext @ 0x7a42cd80] Statistics: 0 seeks, 1 writeouts\n
   [AVIOContext @ 0x7a42ccc0] Statistics: 229376 bytes read, 0 seeks\nConversion failed!\n\n\n\n\n


    


    I tried to figure out the reason for fail. I'm guessing from error message from the line frame MB size (68x120) > level limit (1620), frame size exceeds h264 level limits may be the issue.

    


    Is it the issue ? if it is, what's the solution for this ? if it's not, what went wrong ?

    


    Can somebody help please ? Thank you !

    


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