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• How can several .ts files be converted to one (non-fragmented) .mp4 file using ffmpeg ?

  23 juin 2021, par verified_tinker

  Problem Description

  


  The video player I'm using doesn't support .ts files, but it does play .mp4 files, so I'd like to use ffmpeg to convert my .ts files to .mp4 files.

  


  Goal Solution

  


  Use ffmpeg to download several .ts segments and transcode them into an .mp4 file that I'd load into my video player. Rinse and repeat. It'd add a delay of 10-20 seconds, but that's fine.

  


  The trick is to do the transcoding fast enough so, by the time one .mp4 file is finished playing, the next one is available ; in other words, the transcoding should take less than a second per second of footage. Ideally, it would take significantly less than that, to account for varying processing power on different devices.

  


  To clarify, when I say .mp4, I don't mean fragmented .mp4 files.

  


  ---

  


  If transcoding to some other format is faster, that might be fine, too. For example, I know the .mkv format is playable. I'm still exploring the full range of available formats.

  


  What I've Tried

  


  I tested transcoding 1 .ts file into an .mp4 file, and unfortunately it took about 6 seconds when the file was about 4 seconds long. That was with ffmpeg-wasm. I was hoping the JavaScript bridge might be slowing it down and that batching several .ts segments in 1 call might help.

  


  Command

  


  ffmpeg -i test.ts test.mp4


  


  Log

  


  [info] run FS.writeFile test.ts <349304 bytes binary file>
log.js:15 [info] run ffmpeg command: -i test.ts test.mp4
log.js:15 [fferr] ffmpeg version v0.9.0-2-gb11e5c1495 Copyright (c) 2000-2020 the FFmpeg developers
log.js:15 [fferr]   built with emcc (Emscripten gcc/clang-like replacement) 2.0.8 (d059fd603d0b45b584f634dc2365bc9e9a6ec1dd)
log.js:15 [fferr]   configuration: --target-os=none --arch=x86_32 --enable-cross-compile --disable-x86asm --disable-inline-asm --disable-stripping --disable-programs --disable-doc --disable-debug --disable-runtime-cpudetect --disable-autodetect --extra-cflags='-s USE_PTHREADS=1 -I/src/build/include -O3 --closure 1' --extra-cxxflags='-s USE_PTHREADS=1 -I/src/build/include -O3 --closure 1' --extra-ldflags='-s USE_PTHREADS=1 -I/src/build/include -O3 --closure 1 -L/src/build/lib' --pkg-config-flags=--static --nm=llvm-nm --ar=emar --ranlib=emranlib --cc=emcc --cxx=em++ --objcc=emcc --dep-cc=emcc --enable-gpl --enable-nonfree --enable-zlib --enable-libx264 --enable-libx265 --enable-libvpx --enable-libwavpack --enable-libmp3lame --enable-libfdk-aac --enable-libtheora --enable-libvorbis --enable-libfreetype --enable-libopus --enable-libwebp --enable-libass --enable-libfribidi
log.js:15 [fferr]   libavutil      56. 51.100 / 56. 51.100
log.js:15 [fferr]   libavcodec     58. 91.100 / 58. 91.100
log.js:15 [fferr]   libavformat    58. 45.100 / 58. 45.100
log.js:15 [fferr]   libavdevice    58. 10.100 / 58. 10.100
log.js:15 [fferr]   libavfilter     7. 85.100 /  7. 85.100
log.js:15 [fferr]   libswscale      5.  7.100 /  5.  7.100
log.js:15 [fferr]   libswresample   3.  7.100 /  3.  7.100
log.js:15 [fferr]   libpostproc    55.  7.100 / 55.  7.100
log.js:15 [fferr] Input #0, mpegts, from 'test.ts':
log.js:15 [fferr]   Duration: 00:00:04.00, start: 10.006000, bitrate: 698 kb/s
log.js:15 [fferr]   Program 1 
log.js:15 [fferr]     Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720, 23.98 tbr, 90k tbn, 1411200000.00 tbc
log.js:15 [fferr]     Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 130 kb/s
log.js:15 [fferr] Stream mapping:
log.js:15 [fferr]   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
log.js:15 [fferr]   Stream #0:1 -> #0:1 (aac (native) -> aac (native))
log.js:15 [fferr] [libx264 @ 0x1f5f080] using cpu capabilities: none!
log.js:15 [fferr] [libx264 @ 0x1f5f080] profile High, level 3.1, 4:2:0, 8-bit
log.js:15 [fferr] [libx264 @ 0x1f5f080] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - 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=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=23 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
log.js:15 [fferr] Output #0, mp4, to 'test.mp4':
log.js:15 [fferr]   Metadata:
log.js:15 [fferr]     encoder         : Lavf58.45.100
log.js:15 [fferr]     Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x720, q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc
log.js:15 [fferr]     Metadata:
log.js:15 [fferr]       encoder         : Lavc58.91.100 libx264
log.js:15 [fferr]     Side data:
log.js:15 [fferr]       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
log.js:15 [fferr]     Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
log.js:15 [fferr]     Metadata:
log.js:15 [fferr]       encoder         : Lavc58.91.100 aac
log.js:15 [fferr] frame=    3 fps=0.0 q=0.0 size=       0kB time=00:00:00.38 bitrate=   1.0kbits/s dup=1 drop=0 speed=0.521x    
log.js:15 [fferr] frame=   47 fps= 27 q=0.0 size=       0kB time=00:00:02.09 bitrate=   0.2kbits/s dup=1 drop=0 speed=1.22x    
log.js:15 [fferr] frame=   57 fps= 25 q=28.0 size=       0kB time=00:00:02.51 bitrate=   0.2kbits/s dup=1 drop=0 speed=1.13x    
log.js:15 [fferr] frame=   67 fps= 24 q=28.0 size=       0kB time=00:00:02.96 bitrate=   0.1kbits/s dup=1 drop=0 speed=1.08x    
log.js:15 [fferr] frame=   77 fps= 23 q=28.0 size=       0kB time=00:00:03.37 bitrate=   0.1kbits/s dup=1 drop=0 speed=1.03x    
log.js:15 [fferr] frame=   89 fps= 23 q=28.0 size=       0kB time=00:00:03.96 bitrate=   0.1kbits/s dup=1 drop=0 speed=1.04x    
log.js:15 [fferr] frame=   96 fps= 15 q=-1.0 Lsize=      60kB time=00:00:04.01 bitrate= 122.8kbits/s dup=1 drop=0 speed=0.646x    
log.js:15 [fferr] video:55kB audio:1kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 7.249582%
log.js:15 [fferr] [libx264 @ 0x1f5f080] frame I:1     Avg QP:17.20  size: 31521
log.js:15 [fferr] [libx264 @ 0x1f5f080] frame P:24    Avg QP:16.17  size:   735
log.js:15 [fferr] [libx264 @ 0x1f5f080] frame B:71    Avg QP:27.68  size:    91
log.js:15 [fferr] [libx264 @ 0x1f5f080] consecutive B-frames:  1.0%  0.0%  3.1% 95.8%
log.js:15 [fferr] [libx264 @ 0x1f5f080] mb I  I16..4: 26.2% 56.4% 17.4%
log.js:15 [fferr] [libx264 @ 0x1f5f080] mb P  I16..4:  0.1%  0.2%  0.0%  P16..4:  3.5%  0.4%  0.2%  0.0%  0.0%    skip:95.4%
log.js:15 [fferr] [libx264 @ 0x1f5f080] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  1.6%  0.0%  0.0%  direct: 0.0%  skip:98.3%  L0:31.0% L1:69.0% BI: 0.0%
log.js:15 [fferr] [libx264 @ 0x1f5f080] 8x8 transform intra:56.5% inter:59.4%
log.js:15 [fferr] [libx264 @ 0x1f5f080] coded y,uvDC,uvAC intra: 17.4% 15.4% 7.5% inter: 0.2% 0.4% 0.0%
log.js:15 [fferr] [libx264 @ 0x1f5f080] i16 v,h,dc,p: 29% 63%  1%  7%
log.js:15 [fferr] [libx264 @ 0x1f5f080] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 51% 31% 14%  0%  2%  1%  1%  0%  1%
log.js:15 [fferr] [libx264 @ 0x1f5f080] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 45% 11%  2%  3%  2%  4%  2%  4%
log.js:15 [fferr] [libx264 @ 0x1f5f080] i8c dc,h,v,p: 76% 17%  6%  1%
log.js:15 [fferr] [libx264 @ 0x1f5f080] Weighted P-Frames: Y:0.0% UV:0.0%
log.js:15 [fferr] [libx264 @ 0x1f5f080] ref P L0: 89.5%  1.6%  6.7%  2.3%
log.js:15 [fferr] [libx264 @ 0x1f5f080] ref B L0: 38.5% 60.9%  0.6%
log.js:15 [fferr] [libx264 @ 0x1f5f080] ref B L1: 97.7%  2.3%
log.js:15 [fferr] [libx264 @ 0x1f5f080] kb/s:111.08
log.js:15 [fferr] [aac @ 0x1f48100] Qavg: 65536.000
log.js:15 [ffout] FFMPEG_END
log.js:15 [info] run FS.readFile test.mp4
(index):38 Time elapsed: 6345 (This one's my own code.)
[info] run FS.readFile test.mp4


  


  (I'm running this on the browser. For the purposes of this question, consider the HTML player unavailable for use.)

  


  ---

  


  I also tested feeding the HLS live-stream URL as input to ffmpeg and outputting a single .mp4 file, but I couldn't play it until I ended the live-stream and ffmpeg finished downloading it.

  


  This one I ran on the (Windows) PC ; not the browser.

  


  Command

  


  ffmpeg -i https://stream.mux.com/lngMYGqNpHhYg2ZXqpH8WODVGzuenaZuhckdyunGpzU.m3u8 -acodec copy -bsf:a aac_adtstoasc -vcodec copy out.mp4


  


  Log

  


  The log is too large and StackOverflow won't let me paste it here, so I uploaded it to PasteBin : https://pastebin.com/FqvPQ1DZ

  


• Cannot find yasm even though I have installed it

  20 juin 2016, par zhen lee

  I got a strange problem. I tried to install x264. When run sudo ./configure —enable-shared,
  it gave :

  Found no assembler
  Minimum version is yasm-0.7.0
  If you really want to compile without asm, configure with —disable-asm.

  But I already installed yasm-0.7.0 ,to prove that ,i run yasm —version,it gave :

  *yasm 0.7.0.2066
  Compiled on May 8 2012.
  Copyright (c) 2001-2008 Peter Johnson and other Yasm developers.
  Run yasm —license for licensing overview and summary.*

  I install yasm to /usr/local/yasm,
  Why can it not find yasm ?

• Parsing the STDERR output of node.js child_process line by line

  3 janvier 2012, par primer

  I'm writing a simple online conversion tool using FFMPEG and Node.js. I'm trying to figure out how to parse each line of the conversion output received from FFMPEG and only display pertinent results client side in the browser. In my case I want the encoding time counter that FFMPEG spits out on the command line.

  My function thus far is :

  function metric(ffmpeg, res) { 
  
  
  
    ffmpeg.stdout.on('data', function(data) {
  
       res.writeHead(200, {'content-type': 'text/html'});
  
       res.write('received upload:\n\n');
  
       console.log(data);
  
    });
  
  
  
    ffmpeg.stderr.on('data', function (data) {
  
       var temp += data.toString();
  
              var lines = temp.split('\n');
  
  
  
              //for debugging purposes
  
              for(var i = 0;icode>

  What this ends up returning is multiple arrays, each of which includes the data from the previous array as well as the next data chunk. For example, the function returns array 1 :0=>A, 1=>B, array 2 :0=>A, 1=>B, 2=>C, array 3 :0=>A, 1=>B, 2=>C, 3=>D, and so on.

  I'm quite new to Node so I'm probably missing something simple. Any guidance would be much appreciated !