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• FFMPEG - Accurately cutting video/audio and merging multiple videos together

  8 février 2023, par 3EK

  This post has been updated since the original post

  


  thanks in advance for any help I get with this...

  


  I am working with 4 video assets....all stereo audio, same a/v spec.

  


  intro -
mainvideo -
midroll_video (advert) -
endboard

  


  I need to add an audio only cross fade between the 2 video elements part2.mp4 and pip.mp4. These 2 videos are made by the code (rather than being 2 of the 4 videos listed above). I have added in the code as kindly instructed by @Баяр Гончикжапов but unfortunately it is still not working. See conversation below for more info/ the part i need help with.

  


  Thanks in advance !

  


  This is the code I am using.

  


  
# Input parameters
mainvideo=mezzfile.mp4
endboard=endboard.mp4
intro=sting.mp4
midroll_video=midroll.mp4

tailtime=20
fadelength=0.2
midroll_edit_value=00:11:31.600

# Time calculations to define cut point
duration=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 $mainvideo)
endboard_cut_point=$(echo "scale=2;$duration-$tailtime" | bc)

duration=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 $mainvideo)
midroll_cut_point=$(echo "scale=2;$duration-$midroll_edit_value" | bc)

# Safety check
tbn_main=$(ffprobe -v error -select_streams v -show_entries stream=time_base -of default=noprint_wrappers=1:nokey=1 $mainvideo)
tbn_main=${tbn_main#*/}
tbn_intro=$(ffprobe -v error -select_streams v -show_entries stream=time_base -of default=noprint_wrappers=1:nokey=1 $intro)
tbn_intro=${tbn_intro#*/}
tbn_end=$(ffprobe -v error -select_streams v -show_entries stream=time_base -of default=noprint_wrappers=1:nokey=1 $endboard)
tbn_end=${tbn_end#*/}

if [[ $(( ($tbn_intro+$tbn_main+$tbn_end)/3 )) -ne $tbn_main ]]; then
  echo "WARNING: source video files have the different timebase."
  echo "The use of the concat demuxer will produce incorrect output."
  echo "Re-encoding is highly recommended."
  read -s -k $'?Press any key to exit.\n'
  exit 1
fi

# Trim the main part of mainvideo
ffmpeg -hide_banner -y -i $mainvideo -to $midroll_edit_value -c copy part1.mp4

ffmpeg -hide_banner -y -i $mainvideo -ss $midroll_edit_value -to $endboard_cut_point -c copy part2.mp4

ffmpeg -hide_banner -y -i $mainvideo -ss $midroll_edit_value -to $duration -c copy part2av.mp4


# Trim the tail of mainvideo and overlay it onto endboard
ffmpeg -hide_banner -y \
  -i $mainvideo \
  -i $endboard \
  -filter_complex \
    "[0:v]select='gt(t,$duration-$tailtime)',scale=w=iw/2.03:h=ih/2.03,setpts=PTS-STARTPTS[v_tail]; \
     [0:a]aselect='gt(t,$duration-$tailtime)',asetpts=PTS-STARTPTS[a_out]; \
     [1:v][v_tail]overlay=format=auto[v_out]" \
  -map "[v_out]" \
  -map "[a_out]" \
  -video_track_timescale $tbn_main \
  pip.mp4

ffmpeg -hide_banner -y -i "part2.mp4" -i "part2av.mp4" -i "pip.mp4" \
  -filter_complex \
     -map "[0:v];" 
     -map "[1:a];" 
     -map "[2:v]" 
     -c copy "part2pip.mp4" \

# Pass all parts through the concat demuxer
[ -f filelist.txt ] && rm filelist.txt
for f in $intro part1.mp4 $midroll_video part2pip.mp4; do echo "file '$PWD/$f'" >> filelist.txt; done
ffmpeg -hide_banner -y -f concat -safe 0 -i filelist.txt -c copy TEST_FILE.mp4

# Sweep the table
rm pip.mp4 part1.mp4 part2.mp4 filelist.txt```


  


• How to convert any format to H264 (html5) video using ffmpeg ? [on hold]

  14 juillet 2013, par kheya

  I am trying to use a single command to convert avi, mov, wmv etc to H264 (HTML5 playback)
  I have command that converted the avi correctly to H264 (created .mp4 file)
  But the same command fails to convert a quicktime mov file.

  I am using the 64bit static built on windows.

  Here is the command I used to convert AVI to H264. This one works.

  for %%a in ("*.avi") do (
  
      ffmpeg -i "%%a" -c:v libx264 -preset slow -crf 20 -c:a libvo_aacenc -b:a 128k "%%~na.mp4"
  
  )

  I am trying this to convert mov to H264 :

  for %%a in ("*.mov") do (
  
      ffmpeg -i "%%a" -vcodec mpeg4 -acodec libvo_aacenc "%%~na.mp4" //fails
  
      ffmpeg -i "%%a" -vcodec libx264 -vprofile high -preset slow -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=-1:480 -threads 0 -acodec libvo_aacenc -b:a 128k "%%~na.mp4" //fails with error )

  Appreciate if you kindly help me.

  EDIT :
  Here is the error :
  [graph 1 input from stream 0:1 @ 0000000002689260] Invalid sample format (null)
  Error opening filters !

  Output of the command :

  ffmpeg -i "file2.mov" -vcodec libx264 -vprofile high -preset slow -b:v 500k -ma
  
  xrate 500k -bufsize 1000k -vf scale=-1:480 -threads 0 -acodec libvo_aacenc -b:a
  
  128k "file2.mp4"
  
  
  
  The system cannot find the drive specified.
  
  ffmpeg version N-54691-g7f4a1fd Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jul 12 2013 16:31:48 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 39.100 / 52. 39.100
  
    libavcodec     55. 18.102 / 55. 18.102
  
    libavformat    55. 12.102 / 55. 12.102
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 80.101 /  3. 80.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Guessed Channel Layout for  Input Stream #0.1 : mono
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file2.mov':
  
    Metadata:
  
      creation_time   : 1998-11-12 18:28:20
  
    Duration: 00:00:28.60, start: 0.000000, bitrate: 111 kb/s
  
      Stream #0:0(eng): Video: svq1 (SVQ1 / 0x31515653), yuv410p, 160x120, 90 kb/s
  
  , 7.52 fps, 7.50 tbr, 600 tbn, 600 tbc
  
      Metadata:
  
        creation_time   : 1998-11-12 18:28:20
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:1(eng): Audio: qdmc (QDMC / 0x434D4451), 44100 Hz, mono
  
      Metadata:
  
        creation_time   : 1998-11-12 18:28:20
  
        handler_name    : Apple Alias Data Handler
  
  [graph 1 input from stream 0:1 @ 000000000251a080] Invalid sample format (null)
  
  Error opening filters!

• FFmpeg - PCM audio direct copy error

  24 décembre 2013, par Yehudi

  I try to use FFmpeg to redirect a rtp/rtsp streaming from one server to another. But it seems has some problem on my audio copy of PCM. My usage is

  ffmpeg -re -max_delay 500000 -i rtsp://admin:password@192.168.2.2/h264 -vcodec copy -acodec copy -f rtsp -muxdelay 0.1 rtsp://192.168.2.6/livetest/live.sdp

  and got the result :

  ffmpeg version N-59275-g9b195dd Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Dec 21 2013 22:01:05 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
  
  cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
  
  ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 58.101 / 52. 58.101
  
    libavcodec     55. 45.103 / 55. 45.103
  
    libavformat    55. 22.100 / 55. 22.100
  
    libavdevice    55.  5.102 / 55.  5.102
  
    libavfilter     4.  0.100 /  4.  0.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [h264 @ 02869300] sps_id out of range
  
      Last message repeated 1 times
  
  [h264 @ 02869300] non-existing PPS referenced
  
  [h264 @ 02869300] non-existing PPS 0 referenced
  
  [h264 @ 02869300] decode_slice_header error
  
  [h264 @ 02869300] no frame!
  
  Guessed Channel Layout for  Input Stream #0.1 : mono
  
  Input #0, rtsp, from 'rtsp://admin:password@192.168.2.2/h264':
  
    Metadata:
  
      title           : Network Camera Live Session
  
    Duration: N/A, start: 0.000000, bitrate: 64 kb/s
  
      Stream #0:0: Video: h264 (Main), yuv420p, 1280x720, 29.97 tbr, 90k tbn, 180k
  
   tbc
  
      Stream #0:1: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s
  
  [rtp @ 04ae1020] Cannot respect max delay: frame size = 0
  
  Output #0, rtsp, to 'rtsp://192.168.2.6/livetest/live.sdp':
  
    Metadata:
  
      title           : Network Camera Live Session
  
      encoder         : Lavf55.22.100
  
      Stream #0:0: Video: h264, yuv420p, 1280x720, q=2-31, 90k tbn, 90k tbc
  
      Stream #0:1: Audio: pcm_mulaw, 8000 Hz, mono, 64 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [rtp @ 04ae1020] Application provided invalid, non monotonically increasing dts
  
  to muxer in stream 0: 1605 >= 1605
  
  av_interleaved_write_frame(): Invalid argument

  The major errors are

  ....
  
  [rtp @ 04ae1020] Cannot respect max delay: frame size = 0
  
  ...
  
  [rtp @ 04ae1020] Application provided invalid, non monotonically increasing dts
  
      to muxer in stream 0: 1605 >= 1605
  
      av_interleaved_write_frame(): Invalid argument

  Do not understand why the direct audio copy would cause this error, could someone kindly prompt how to fix it ?

  Thanks