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• Specifying audio/video for a multiple stream/multiple file setup using ffmpeg

  31 mai 2018, par Robert Smith

  Folks, I have the following ffmpeg command :

  ffmpeg
  
      -i video1a -i video2a -i video3a -i video4a
  
      -i video1b -i video2b -i video3b -i video4b
  
      -i video1c
  
      -filter_complex "
  
          nullsrc=size=640x480 [base];
  
          [0:v] setpts=PTS-STARTPTS+   0/TB, scale=320x240 [1a];
  
          [1:v] setpts=PTS-STARTPTS+ 300/TB, scale=320x240 [2a];
  
          [2:v] setpts=PTS-STARTPTS+ 400/TB, scale=320x240 [3a];
  
          [3:v] setpts=PTS-STARTPTS+ 400/TB, scale=320x240 [4a];
  
          [4:v] setpts=PTS-STARTPTS+2500/TB, scale=320x240 [1b];
  
          [5:v] setpts=PTS-STARTPTS+ 800/TB, scale=320x240 [2b];
  
          [6:v] setpts=PTS-STARTPTS+ 700/TB, scale=320x240 [3b];
  
          [7:v] setpts=PTS-STARTPTS+ 800/TB, scale=320x240 [4b];
  
          [8:v] setpts=PTS-STARTPTS+3000/TB, scale=320x240 [1c];
  
          [base][1a] overlay=eof_action=pass [o1];
  
          [o1][1b] overlay=eof_action=pass [o1];
  
          [o1][1c] overlay=eof_action=pass:shortest=1 [o1];
  
          [o1][2a] overlay=eof_action=pass:x=320 [o2];
  
          [o2][2b] overlay=eof_action=pass:x=320 [o2];
  
          [o2][3a] overlay=eof_action=pass:y=240 [o3];
  
          [o3][3b] overlay=eof_action=pass:y=240 [o3];
  
          [o3][4a] overlay=eof_action=pass:x=320:y=240[o4];
  
          [o4][4b] overlay=eof_action=pass:x=320:y=240"
  
      -c:v libx264 output.mp4

  I have just found out something regarding the files I will be processing with above command : that some mp4 files are video/audio, some mp4 files are audio alone and some mp4 files are video alone. I am already able to determine which ones have audio/video/both using ffprobe. My question is how do I modify above command to state what each file contains (video/audio/both).

  This is the scenario of which file has video/audio/both :

  video   time
  
  ======= =========
  
  Area 1:
  
  video1a    audio
  
  video1b     both
  
  video1c    video
  
  
  
  Area 2:
  
  video2a    video
  
  video2b    audio
  
  
  
  Area 3:
  
  video3a    video
  
  video3b    audio
  
  
  
  Area 4:
  
  video4a    video
  
  video4b    both

  My question is how to correctly modify command above to specify what the file has (audio/video/both). Thank you.

  Update #1

  I ran test as follows :

  -i "video1a.flv"
  
  -i "video1b.flv"
  
  -i "video1c.flv"
  
  -i "video2a.flv"
  
  -i "video3a.flv"
  
  -i "video4a.flv"
  
  -i "video4b.flv"
  
  -i "video4c.flv"
  
  -i "video4d.flv"
  
  -i "video4e.flv"
  
  
  
  -filter_complex 
  
  
  
  nullsrc=size=640x480[base];
  
  [0:v]setpts=PTS-STARTPTS+120/TB,scale=320x240[1a];
  
  [1:v]setpts=PTS-STARTPTS+3469115/TB,scale=320x240[1b];
  
  [2:v]setpts=PTS-STARTPTS+7739299/TB,scale=320x240[1c];
  
  [5:v]setpts=PTS-STARTPTS+4390466/TB,scale=320x240[4a];
  
  [6:v]setpts=PTS-STARTPTS+6803937/TB,scale=320x240[4b];
  
  [7:v]setpts=PTS-STARTPTS+8242005/TB,scale=320x240[4c];
  
  [8:v]setpts=PTS-STARTPTS+9811577/TB,scale=320x240[4d];
  
  [9:v]setpts=PTS-STARTPTS+10765190/TB,scale=320x240[4e];
  
  [base][1a]overlay=eof_action=pass[o1];
  
  [o1][1b]overlay=eof_action=pass[o1];
  
  [o1][1c]overlay=eof_action=pass:shortest=1[o1];
  
  [o1][4a]overlay=eof_action=pass:x=320:y=240[o4];
  
  [o4][4b]overlay=eof_action=pass:x=320:y=240[o4];
  
  [o4][4c]overlay=eof_action=pass:x=320:y=240[o4];
  
  [o4][4d]overlay=eof_action=pass:x=320:y=240[o4];
  
  [o4][4e]overlay=eof_action=pass:x=320:y=240;
  
  [0:a]asetpts=PTS-STARTPTS+120/TB,aresample=async=1,apad[a1a];
  
  [1:a]asetpts=PTS-STARTPTS+3469115/TB,aresample=async=1,apad[a1b];
  
  [2:a]asetpts=PTS-STARTPTS+7739299/TB,aresample=async=1[a1c];
  
  [3:a]asetpts=PTS-STARTPTS+82550/TB,aresample=async=1,apad[a2a];
  
  [4:a]asetpts=PTS-STARTPTS+2687265/TB,aresample=async=1,apad[a3a];
  
  [a1a][a1b][a1c][a2a][a3a]amerge=inputs=5
  
  
  
  -c:v libx264 -c:a aac -ac 2 output.mp4

  This is the stream data from ffmpeg :

  Input #0
  
    Stream #0:0: Video: vp6f, yuv420p, 160x128, 1k tbr, 1k tbn
  
    Stream #0:1: Audio: nellymoser, 11025 Hz, mono, flt
  
  
  
  Input #1
  
    Stream #1:0: Audio: nellymoser, 11025 Hz, mono, flt
  
    Stream #1:1: Video: vp6f, yuv420p, 160x128, 1k tbr, 1k tbn
  
  
  
  Input #2
  
    Stream #2:0: Audio: nellymoser, 11025 Hz, mono, flt
  
    Stream #2:1: Video: vp6f, yuv420p, 160x128, 1k tbr, 1k tbn
  
  
  
  Input #3
  
    Stream #3:0: Audio: nellymoser, 11025 Hz, mono, flt
  
  
  
  Input #4
  
    Stream #4:0: Audio: nellymoser, 11025 Hz, mono, flt
  
  
  
  Input #5
  
    Stream #5:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn
  
  
  
  Input #6
  
    Stream #6:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn
  
  
  
  Input #7
  
    Stream #7:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn
  
  
  
  Input #8
  
    Stream #8:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn
  
  
  
  Input #9
  
    Stream #9:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn

  This is the error :

  Stream mapping:
  
    Stream #0:0 (vp6f) -> setpts
  
    Stream #0:1 (nellymoser) -> asetpts
  
  
  
    Stream #1:0 (nellymoser) -> asetpts
  
    Stream #1:1 (vp6f) -> setpts
  
  
  
    Stream #2:0 (nellymoser) -> asetpts
  
    Stream #2:1 (vp6f) -> setpts
  
  
  
    Stream #3:0 (nellymoser) -> asetpts
  
  
  
    Stream #4:0 (nellymoser) -> asetpts
  
  
  
    Stream #5:0 (vp6f) -> setpts
  
  
  
    Stream #6:0 (vp6f) -> setpts
  
  
  
    Stream #7:0 (vp6f) -> setpts
  
  
  
    Stream #8:0 (vp6f) -> setpts
  
  
  
    Stream #9:0 (vp6f) -> setpts
  
  
  
    overlay -> Stream #0:0 (libx264)
  
    amerge -> Stream #0:1 (aac)
  
  Press [q] to stop, [?] for help
  
  
  
  Enter command: <target>|all <time>|-1 <command>[ <argument>]
  
  
  
  Parse error, at least 3 arguments were expected, only 1 given in string 'ho Oscar'
  
  [Parsed_amerge_39 @ 0aa147c0] No channel layout for input 1
  
      Last message repeated 1 times
  
  [AVFilterGraph @ 05e01900] The following filters could not choose their formats: Parsed_amerge_39
  
  Consider inserting the (a)format filter near their input or output.
  
  Error reinitializing filters!
  
  Failed to inject frame into filter network: I/O error
  
  Error while processing the decoded data for stream #4:0
  
  Conversion failed!
  
  </argument></command></time></target>

  Update #2

  Would it be like this :

  -i "video1a.flv"
  
  -i "video1b.flv"
  
  -i "video1c.flv"
  
  -i "video2a.flv"
  
  -i "video3a.flv"
  
  -i "video4a.flv"
  
  -i "video4b.flv"
  
  -i "video4c.flv"
  
  -i "video4d.flv"
  
  -i "video4e.flv"
  
  
  
  -filter_complex 
  
  
  
  nullsrc=size=640x480[base];
  
  [0:v]setpts=PTS-STARTPTS+120/TB,scale=320x240[1a];
  
  [1:v]setpts=PTS-STARTPTS+3469115/TB,scale=320x240[1b];
  
  [2:v]setpts=PTS-STARTPTS+7739299/TB,scale=320x240[1c];
  
  [5:v]setpts=PTS-STARTPTS+4390466/TB,scale=320x240[4a];
  
  [6:v]setpts=PTS-STARTPTS+6803937/TB,scale=320x240[4b];
  
  [7:v]setpts=PTS-STARTPTS+8242005/TB,scale=320x240[4c];
  
  [8:v]setpts=PTS-STARTPTS+9811577/TB,scale=320x240[4d];
  
  [9:v]setpts=PTS-STARTPTS+10765190/TB,scale=320x240[4e];
  
  [base][1a]overlay=eof_action=pass[o1];
  
  [o1][1b]overlay=eof_action=pass[o1];
  
  [o1][1c]overlay=eof_action=pass:shortest=1[o1];
  
  [o1][4a]overlay=eof_action=pass:x=320:y=240[o4];
  
  [o4][4b]overlay=eof_action=pass:x=320:y=240[o4];
  
  [o4][4c]overlay=eof_action=pass:x=320:y=240[o4];
  
  [o4][4d]overlay=eof_action=pass:x=320:y=240[o4];
  
  [o4][4e]overlay=eof_action=pass:x=320:y=240;
  
  [0:a]asetpts=PTS-STARTPTS+120/TB,aresample=async=1,pan=1c|c0=c0,apad[a1a];
  
  [1:a]asetpts=PTS-STARTPTS+3469115/TB,aresample=async=1,pan=1c|c0=c0,apad[a1b];
  
  [2:a]asetpts=PTS-STARTPTS+7739299/TB,aresample=async=1,pan=1c|c0=c0[a1c];
  
  [3:a]asetpts=PTS-STARTPTS+82550/TB,aresample=async=1,pan=1c|c0=c0,apad[a2a];
  
  [4:a]asetpts=PTS-STARTPTS+2687265/TB,aresample=async=1,pan=1c|c0=c0,apad[a3a];
  
  [a1a][a1b][a1c][a2a][a3a]amerge=inputs=5
  
  
  
  -c:v libx264 -c:a aac -ac 2 output.mp4

  Update #3

  Now getting this error :

  Stream mapping:
  
    Stream #0:0 (vp6f) -> setpts
  
    Stream #0:1 (nellymoser) -> asetpts
  
    Stream #1:0 (nellymoser) -> asetpts
  
    Stream #1:1 (vp6f) -> setpts
  
    Stream #2:0 (nellymoser) -> asetpts
  
    Stream #2:1 (vp6f) -> setpts
  
    Stream #3:0 (nellymoser) -> asetpts
  
    Stream #4:0 (nellymoser) -> asetpts
  
    Stream #5:0 (vp6f) -> setpts
  
    Stream #6:0 (vp6f) -> setpts
  
    Stream #7:0 (vp6f) -> setpts
  
    Stream #8:0 (vp6f) -> setpts
  
    Stream #9:0 (vp6f) -> setpts
  
    overlay -> Stream #0:0 (libx264)
  
    amerge -> Stream #0:1 (aac)
  
  Press [q] to stop, [?] for help
  
  
  
  Enter command: <target>|all <time>|-1 <command>[ <argument>]
  
  
  
  Parse error, at least 3 arguments were expected, only 1 given in string 'ho Oscar'
  
  [Parsed_amerge_44 @ 0a9808c0] No channel layout for input 1
  
  [Parsed_amerge_44 @ 0a9808c0] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
  
  [Parsed_pan_27 @ 07694800] Pure channel mapping detected: 0
  
  [Parsed_pan_31 @ 07694a80] Pure channel mapping detected: 0
  
  [Parsed_pan_35 @ 0a980300] Pure channel mapping detected: 0
  
  [Parsed_pan_38 @ 0a980500] Pure channel mapping detected: 0
  
  [Parsed_pan_42 @ 0a980780] Pure channel mapping detected: 0
  
  [libx264 @ 06ad78c0] using SAR=1/1
  
  [libx264 @ 06ad78c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 06ad78c0] profile High, level 3.0
  
  [libx264 @ 06ad78c0] 264 - core 155 r2901 7d0ff22 - 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=15 lookahead_threads=2 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 'output.mp4':
  
    Metadata:
  
      canSeekToEnd    : false
  
      encoder         : Lavf58.16.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        encoder         : Lavc58.19.102 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), 11025 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc58.19.102 aac
  
  ...
  
  ...
  
  Error while processing the decoded data for stream #1:1
  
  [libx264 @ 06ad78c0] frame I:133   Avg QP: 8.58  size:  6481
  
  [libx264 @ 06ad78c0] frame P:8358  Avg QP:17.54  size:  1386
  
  [libx264 @ 06ad78c0] frame B:24582 Avg QP:24.27  size:   105
  
  [libx264 @ 06ad78c0] consecutive B-frames:  0.6%  0.5%  0.7% 98.1%
  
  [libx264 @ 06ad78c0] mb I  I16..4: 78.3% 16.1%  5.6%
  
  [libx264 @ 06ad78c0] mb P  I16..4:  0.3%  0.7%  0.1%  P16..4:  9.6%  3.0%  1.4%  0.0%  0.0%    skip:84.9%
  
  [libx264 @ 06ad78c0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  2.9%  0.1%  0.0%  direct: 0.2%  skip:96.8%  L0:47.0% L1:49.0% BI: 4.0%
  
  [libx264 @ 06ad78c0] 8x8 transform intra:35.0% inter:70.1%
  
  [libx264 @ 06ad78c0] coded y,uvDC,uvAC intra: 36.8% 43.7% 27.3% inter: 1.6% 3.0% 0.1%
  
  [libx264 @ 06ad78c0] i16 v,h,dc,p: 79%  8%  4%  9%
  
  [libx264 @ 06ad78c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 20% 12%  3%  6%  8%  6%  5%  7%
  
  [libx264 @ 06ad78c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 38% 22%  9%  4%  6%  7%  5%  5%  4%
  
  [libx264 @ 06ad78c0] i8c dc,h,v,p: 62% 15% 16%  7%
  
  [libx264 @ 06ad78c0] Weighted P-Frames: Y:0.6% UV:0.5%
  
  [libx264 @ 06ad78c0] ref P L0: 65.4% 12.3% 14.3%  7.9%  0.0%
  
  [libx264 @ 06ad78c0] ref B L0: 90.2%  7.5%  2.3%
  
  [libx264 @ 06ad78c0] ref B L1: 96.3%  3.7%
  
  [libx264 @ 06ad78c0] kb/s:90.81
  
  [aac @ 06ad8480] Qavg: 65519.970
  
  [aac @ 06ad8480] 2 frames left in the queue on closing
  
  Conversion failed!
  
  </argument></command></time></target>

• Bring back support for CommonJS

  19 juin 2018, par bbc2

  Bring back support for CommonJS
  Browserify, which follows CommonJS module conventions, parses the AST
  
  for `require` calls to determine the dependencies of a project.
  jQuery File Upload used to support this ; it was removed in
  
  e2cda462610c776a1f7856692c98b1baab02231a when a new version of
  
  jquery.ui.widget.js was vendored.
  

• Game Music Appreciation, One Year Later

  1er août 2013, par Multimedia Mike — General

  I released my game music website last year about this time. It was a good start and had potential to grow in a lot of directions. But I’m a bit disappointed that I haven’t evolved it as quickly as I would like to. I have made a few improvements, like adjusting the play lengths of many metadata-less songs and revising the original atrocious design of the website using something called Twitter Bootstrap (and, wow, once you know what Bootstrap is, you start noticing it everywhere on the modern web). However, here are a few of the challenges that have slowed me down over the year :

  Problems With Native Client – Build System
  The technology which enables this project — Google’s Native Client (NaCl) — can be troublesome. One of my key frustrations with the environment is that every single revision of the NaCl SDK seems to adopt a completely new build system layout. If you want to port your NaCl project forward to newer revisions, you have to spend time wrapping your head around whatever the favored build system is. When I first investigated NaCl, I think it was using vanilla GNU Make. Then it switched to SCons. Then I forgot about NaCl for about a year and when I came back, the SDK had reverted back to GNU Make. While that has been consistent, the layout of the SDK sometimes changes and a different example Makefile shows the way.

  The very latest version of the API has required me to really overhaul the Makefile and to truly understand the zen of Makefile programming. I’m even starting to grasp the relationship it has to functional programming.

  Problems With Native Client – API Versions and Chrome Bugs
  I built the original Salty Game Music Player when NaCl API version 16 was current. By the time I published the v16 version, v19 was available. I made the effort to port forward (a few APIs had superfically changed, nothing too dramatic). However, when I would experiment with this new player, I would see intermittent problems on my Windows 7 desktop. Because of this, I was hesitant to make a new player release.

  Around the end of May, I started getting bug reports from site users that their Chrome browsers weren’t allowing them to activate the Salty Game Music Player — the upshot was that they couldn’t play music unless they manually flipped a setting in their browser configuration. It turns out that Chrome 27 introduced a bug that caused this problem. Not only that, but my player was one of only 2 known NaCl apps that used the problematic feature (the other was developed by the Google engineer who entered the bug).

  After feeling negligent for a long while about not doing anything to fix the bug, I made a concerted and creative effort to work around the bug and pushed out a new version of the player (based on API v25). My effort didn’t work and I had to roll it back somewhat (but still using the new player binaries). The bug was something that I couldn’t work around. However, at about the same time that I was attempting to do this, Google was rolling out Chrome 28 which fixed the bug, rendering my worry and effort moot.

  Problems With Native Client – Still Not In The Clear
  I felt reasonably secure about releasing the updated player since I couldn’t make my aforementioned problem occur on my Windows 7 setup anymore. I actually have a written test plan for this player, believe it or not. However, I quickly started receiving new bug reports from Windows users. Mostly, these are Windows 8 users. The player basically doesn’t work at all for them now. One user reports the problem on Windows 7 (and another on Windows 2008 Server, I think). But I can’t see it.

  I have a theory about what might be going wrong, but of course I’ll need to test it, and determine how to fix it.

  Database Difficulties
  The player is only half of the site ; the other half is the organization of music files. Working on this project has repeatedly reminded me of my fundamental lack of skill concerning databases. I have a ‘production’ database– now I’m afraid to do anything with it for fear of messing it up. It’s an an SQLite3 database, so it’s easy to make backups and to create a copy in order to test and debug a new script. Still, I feel like I’m missing an entire career path worth of database best practices.

  There is also the matter of ongoing database maintenance. There are graphical frontends for SQLite3 which make casual updates easier and obviate the need for anything more sophisticated (like a custom web app). However, I have a slightly more complicated database entry task that I fear will require, well, a custom web app in order to smoothly process hundreds, if not thousands of new song files (which have quirks which prohibit the easy mass processing I have been able to get away with so far).

  Going Forward
  I remain hopeful that I’ll gradually overcome these difficulties. I still love this project and I have received nothing but positive feedback over the past year (modulo the assorted recommendations that I port the entire player to pure JavaScript).

  You would think I would learn a lesson about building anything on top of a Google platform in the future, especially Native Client. Despite all this, I have another NaCl project planned.