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• ffmpeg : join + crossfade 5 input files (video+audio) into one output file

  7 avril 2020, par Fab Sanchez

  I have 5 mp4 input videos (audio+video) that I want to 'join' into a single output video with a crossfade effect in between each pair of videos.
I want to 'crossfade' both the audio and the video, with a transition of 0.4s.
(Not an actual crossfade, more like video-2 fades in over video-1, video-1 does not need to fade out, but this is not the problem)

  



  I'm using ffmpeg-4.1.3-win64-static

  



  I have followed many tutorials and answers from here, but there are so many different ways to do it...

  



  Each one of the 5 videos is 1.024s long, duration obtained with ffprobe

  



  ffprobe.exe -i "0.mp4" -show_entries format=duration -v quiet -of csv="p=0"


  



  This is the command for both audio and video :
(I've reformatted the command so it is easier to read, it is issued as a single line in the command prompt)

  



  ffmpeg.exe -y -i "0.mp4" -i "1.mp4" -i "2.mp4" -i "3.mp4" -i "4.mp4" 
-filter_complex "
[0:v]setpts=PTS-STARTPTS[v1];
[1:v]format=yuva420p,fade=in:st=0:d=0.4:alpha=1,setpts=PTS-STARTPTS+(0.6/TB)[v2];
[2:v]format=yuva420p,fade=in:st=0:d=0.4:alpha=1,setpts=PTS-STARTPTS+(1.2/TB)[v3];
[3:v]format=yuva420p,fade=in:st=0:d=0.4:alpha=1,setpts=PTS-STARTPTS+(1.8/TB)[v4];
[4:v]format=yuva420p,fade=in:st=0:d=0.4:alpha=1,setpts=PTS-STARTPTS+(2.4/TB)[v5];
[v1][v2]overlay[u1];[u1][v3]overlay[u2];[u2][v4]overlay[u3];[u3][v5]overlay,format=yuv420p[v];
[0][1]acrossfade=d=0.4[a0];
[a0][2]acrossfade=d=0.4[a1];
[a1][3]acrossfade=d=0.4[a2];
[a2][4]acrossfade=d=0.4[a]
" -map [v] -map [a] "output.mp4"


  



  When I do both audio and video into a single output file, output.mp4 can not be played on VLC, this is the vlc log :

  



  main debug: `file:///C:/project/input-videos/output.mp4' gives access `file' demux `any' path `/C:project/input-videos/output.mp4'
main debug: creating demux: access='file' demux='any' location='/C:/project/input-videos/output.mp4' file='C:\project\input-videos\output.mp4'
main debug: looking for access_demux module matching "file": 15 candidates
main debug: no access_demux modules matched
main debug: creating access: file:///C:/project/input-videos/output.mp4
main debug:  (path: C:\project\input-videos\output.mp4)
main debug: looking for access module matching "file": 26 candidates
main debug: using access module "filesystem"
main debug: looking for stream_filter module matching "prefetch,cache_read": 24 candidates
cache_read debug: Using stream method for AStream*
cache_read debug: starting pre-buffering
cache_read error: cannot pre fill buffer
main debug: looking for meta fetcher module matching "any": 1 candidates
main debug: no stream_filter modules matched
main warning: cannot insert stream filter prefetch,cache_read
main debug: looking for stream_filter module matching "any": 24 candidates
playlist debug: not enough data
...


  



  This is the output from ffmpeg :

  



  ffmpeg version 4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.3.1 (GCC) 20190414
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --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
  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
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '0.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
    location-eng    : +52.6899-001.8293/
    location        : +52.6899-001.8293/
  Duration: 00:00:01.02, start: 0.000000, bitrate: 13821 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2224x1080 [SAR 1:1 DAR 278:135], 14002 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandle
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
    Metadata:
      handler_name    : SoundHandle
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
    location-eng    : +53.4256-001.3580/
    location        : +53.4256-001.3580/
  Duration: 00:00:01.02, start: 0.000000, bitrate: 7094 kb/s
    Stream #1:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2224x1080 [SAR 1:1 DAR 278:135], 7113 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandle
    Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
    Metadata:
      handler_name    : SoundHandle
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
    location-eng    : +53.3927-001.5044/
    location        : +53.3927-001.5044/
  Duration: 00:00:01.02, start: 0.000000, bitrate: 7367 kb/s
    Stream #2:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2224x1080 [SAR 1:1 DAR 278:135], 7394 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandle
    Stream #2:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 126 kb/s (default)
    Metadata:
      handler_name    : SoundHandle
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '3.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
    location-eng    : +53.3927-001.5044/
    location        : +53.3927-001.5044/
  Duration: 00:00:01.02, start: 0.000000, bitrate: 8145 kb/s
    Stream #3:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2224x1080 [SAR 1:1 DAR 278:135], 8192 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandle
    Stream #3:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      handler_name    : SoundHandle
Input #4, mov,mp4,m4a,3gp,3g2,mj2, from '4.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
    location-eng    : +53.3927-001.5044/
    location        : +53.3927-001.5044/
  Duration: 00:00:01.02, start: 0.000000, bitrate: 6241 kb/s
    Stream #4:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2224x1080 [SAR 1:1 DAR 278:135], 6241 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandle
    Stream #4:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 126 kb/s (default)
    Metadata:
      handler_name    : SoundHandle
Stream mapping:
  Stream #0:0 (h264) -> setpts
  Stream #0:1 (aac) -> acrossfade:crossfade0
  Stream #1:0 (h264) -> format
  Stream #1:1 (aac) -> acrossfade:crossfade1
  Stream #2:0 (h264) -> format
  Stream #2:1 (aac) -> acrossfade:crossfade1
  Stream #3:0 (h264) -> format
  Stream #3:1 (aac) -> acrossfade:crossfade1
  Stream #4:0 (h264) -> format
  Stream #4:1 (aac) -> acrossfade:crossfade1
  format -> Stream #0:0 (libx264)
  acrossfade -> Stream #0:1 (aac)
  Press [q] to stop, [?] for help


  



  When I do the video only it is fine. The duration of the output.mp4 file generated for video-only is 3.4s

  



  When I do the audio only it is also fine. The duration of the output.mp4 file generated for audio-only is 3.435s

  



  This is the command for video only :

  



  ffmpeg.exe -y  -i "0.mp4" -i "1.mp4" -i "2.mp4" -i "3.mp4" -i "4.mp4" 
-filter_complex "
[0:v]setpts=PTS-STARTPTS[v1];
[1:v]format=yuva420p,fade=in:st=0:d=0.4:alpha=1,setpts=PTS-STARTPTS+(0.6/TB)[v2];
[2:v]format=yuva420p,fade=in:st=0:d=0.4:alpha=1,setpts=PTS-STARTPTS+(1.2/TB)[v3];
[3:v]format=yuva420p,fade=in:st=0:d=0.4:alpha=1,setpts=PTS-STARTPTS+(1.8/TB)[v4];
[4:v]format=yuva420p,fade=in:st=0:d=0.4:alpha=1,setpts=PTS-STARTPTS+(2.4/TB)[v5];
[v1][v2]overlay[u1];[u1][v3]overlay[u2];[u2][v4]overlay[u3];[u3][v5]overlay,format=yuv420p[v]
" -map [v] "output.mp4"


  



  This is the command for audio only :

  



  ffmpeg.exe -y  -i "0.mp4" -i "1.mp4" -i "2.mp4" -i "3.mp4" -i "4.mp4" 
-filter_complex "
[0][1]acrossfade=d=0.4[a0];
[a0][2]acrossfade=d=0.4[a1];
[a1][3]acrossfade=d=0.4[a2];
[a2][4]acrossfade=d=0.4[a]
" -map [a] "output.mp4"


  



  What am I missing in order to generate one output file with both audio and video content ?

  



  Edit : Here's the full ffmpeg command + result for audio and video combined with "-loglevel debug" added. (Too big to add directly here, so I've added it to Pastebin)
https://pastebin.com/NLBc7Abb

  



  Work Around
Not a solution, but I found a work around :

  



  

  • Create video only output using command above, output to video.mp4

  


  • Create audio only output using command above, output to audio.mp4

  


  • Merge both video.mp4 and audio.mp4 into output.mp4 using the following command :

  


  



  ffmpeg.exe -y -i "video.mp4" -i "audio.mp4" -c:v copy -c:a aac output.mp4


  



  If anyone has any ideas as to why the combined audio+video command does not work, please let me know. :)

  


• Could not find codec parameters for stream 0 (Video : hevc, none) : unspecified size

  5 avril 2020, par bzc0fq

  I try to use ffmpeg to feed ffserver on CENTOS 6.10. When I run ffmpeg on stream I got an error message : Could not find codec parameters for stream 0 (Video : h264, none) : unspecified size.

  



  The full ffmpeg output is here :

  



  [root@stone1 ~]# ffmpeg -i rtsp://user44:xxx@192.168.101.108:554/0 -y http://192.168.101.1:8090/feed2.ffm
ffmpeg version 2.6.8 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-gnutls --enable-ladspa --enable-libass --enable-libdc1394 --enable-libfaac --enable-nonfree --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
  libavutil      54. 20.100 / 54. 20.100
  libavcodec     56. 26.100 / 56. 26.100
  libavformat    56. 25.101 / 56. 25.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 11.102 /  5. 11.102
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
[rtsp @ 0x8bc780] Could not find codec parameters for stream 0 (Video: hevc, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Guessed Channel Layout for  Input Stream #0.1 : mono
Input #0, rtsp, from 'rtsp://user44:xxx@192.168.101.108:554/0':
  Metadata:
    title           : h264.mp4
  Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: hevc, none, 90k tbr, 90k tbn, 90k tbc
    Stream #0:1: Audio: pcm_mulaw, 8000 Hz, 1 channels, s16, 64 kb/s
[buffer @ 0x91c2e0] Unable to parse option value "0x0" as image size
[buffer @ 0x91c2e0] Unable to parse option value "-1" as pixel format
[buffer @ 0x91c2e0] Unable to parse option value "0x0" as image size
[buffer @ 0x91c2e0] Error setting option video_size to value 0x0.
[graph 0 input from stream 0:0 @ 0x8a0da0] Error applying options to the filter.
Error opening filters!


  



  I tested the stream with vlc on windows and it looks it works fine.


  



  Any hints on the issue ?

  



  ---

  



  UPDATE

  



  I have confirmed that the same issue remains on Windows and Linux ffmpeg ver. 4.2.2. Please find attached debug output bellow.

  



  D:\Temp\ffmpeg-4.2.2-win64-static\bin>ffmpeg -loglevel debug -i rtsp://userxx:xxx@192.168.101.108:554/0:0 -y http://192.168.101.1:8090/feed2.ffm
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
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-i' ... matched as input url with argument 'rtsp://userxx:xxx@192.168.101.108:554/0:0'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option 'http://192.168.101.1:8090/feed2.ffm' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url rtsp://userxx:xxx@192.168.101.108:554/0:0.
Successfully parsed a group of options.
Opening an input file: rtsp://userxx:xxx@192.168.101.108:554/0:0.
[tcp @ 000002426835b540] No default whitelist set
[tcp @ 000002426835b540] Original list of addresses:
[tcp @ 000002426835b540] Address 192.168.101.108 port 554
[tcp @ 000002426835b540] Interleaved list of addresses:
[tcp @ 000002426835b540] Address 192.168.101.108 port 554
[tcp @ 000002426835b540] Starting connection attempt to 192.168.101.108 port 554
[tcp @ 000002426835b540] Successfully connected to 192.168.101.108 port 554
[rtsp @ 0000024268358c40] SDP:
v=0
o=StreamingServer 3331435948 1116907222000 IN IP4 192.168.101.108
s=h264.mp4
c=IN IP4 0.0.0.0
t=0 0
a=control:*
m=video 0 RTP/AVP 96
a=control:trackID=0
a=rtpmap:96 H265/90000
a=ptime:40
a=range:npt=0-0
a=fmtp:96 packetization-mode=1; sprop-parameter-sets=(null)
a=videoinfo:960*576*30*4096
m=audio 0 RTP/AVP 0
a=control:trackID=1
a=rtpmap:0 PCMU/8000
a=ptime:20


[rtsp @ 0000024268358c40] video codec set to: hevc
[rtsp @ 0000024268358c40] audio codec set to: pcm_mulaw
[rtsp @ 0000024268358c40] audio samplerate set to: 8000
[rtsp @ 0000024268358c40] audio channels set to: 1
[rtp @ 000002426835bb00] No default whitelist set
[udp @ 000002426835f600] No default whitelist set
[udp @ 000002426835f600] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
[udp @ 000002426835f600] end receive buffer size reported is 65536
[udp @ 000002426836f900] No default whitelist set
[udp @ 000002426836f900] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
[udp @ 000002426836f900] end receive buffer size reported is 65536
[rtsp @ 0000024268358c40] setting jitter buffer size to 500
[rtp @ 00000242683804c0] No default whitelist set
[udp @ 0000024268380780] No default whitelist set
[udp @ 0000024268380780] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
[udp @ 0000024268380780] end receive buffer size reported is 65536
[udp @ 0000024268390a80] No default whitelist set
[udp @ 0000024268390a80] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
[udp @ 0000024268390a80] end receive buffer size reported is 65536
[rtsp @ 0000024268358c40] setting jitter buffer size to 500
[rtsp @ 0000024268358c40] hello state=0
[rtsp @ 0000024268358c40] Could not find codec parameters for stream 0 (Video: hevc, 1 reference frame, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, rtsp, from 'rtsp://userxx:xxx@192.168.101.108:554/0:0':
  Metadata:
    title           : h264.mp4
  Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
    Stream #0:0, 0, 1/90000: Video: hevc, 1 reference frame, none, 90k tbr, 90k tbn, 90k tbc
    Stream #0:1, 0, 1/8000: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s
Successfully opened the file.
Parsing a group of options: output url http://192.168.101.1:8090/feed2.ffm.
Successfully parsed a group of options.
Opening an output file: http://192.168.101.1:8090/feed2.ffm.
[NULL @ 00000242683c85c0] Unable to find a suitable output format for 'http://192.168.101.1:8090/feed2.ffm'
http://192.168.101.1:8090/feed2.ffm: Invalid argument


  



  VLC works fine on the same Windows system.

  



  Any hints on this please ?

  


• Reencode videos from 30fps to 60fps using ffmpeg

  2 avril 2020, par RonPringadi

  If I have an mp4 with 30 fps, how do I re-encode it to 60 fps using ffmpg without making the movie speeding up faster (still looking normal) ?

  



  My ffmpeg

  



  ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)