Recherche avancée

Sur d’autres sites (10460)

• why it is taking a lot of time to convert image via HTTP to video in ffmpeg ?

  20 avril 2021, par al pacino

  Below is the ffmpeg i am using to convert images into videos but It is taking around 3 minutes to convert image to 5 second video.
If I run the command on Image present on a directory then it converts images to videos very swiftly.

  


  can anyone tell what I am doing wrong ?

  


  ffmpeg -loop 1 -i 'https://cdn.pixabay.com/photo/2020/10/23/12/03/arch-5678549__340.jpg' -t 5 -vf scale=1280:780 output.mp4 

ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix= --prefix=/usr --disable-debug --disable-doc --disable-static --enable-cuda --enable-cuda-sdk --enable-cuvid --enable-libdrm --enable-ffplay --enable-gnutls --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libnpp --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopus --enable-libpulse --enable-sdl2 --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-nonfree --enable-nvenc --enable-omx --enable-openal --enable-opencl --enable-runtime-cpudetect --enable-shared --enable-vaapi --enable-vdpau --enable-version3 --enable-xlib
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, image2, from 'https://cdn.pixabay.com/photo/2021/04/17/18/26/woman-6186493__340.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 5538 kb/s
    Stream #0:0: Video: mjpeg (Progressive), yuvj420p(pc, bt470bg/unknown/unknown), 511x340 [SAR 1:1 DAR 511:340], 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[swscaler @ 0x5580ac8e7c40] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 0x5580ac186b40] using SAR=1034/1129
[libx264 @ 0x5580ac186b40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x5580ac186b40] profile High, level 3.2
[libx264 @ 0x5580ac186b40] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=12 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:
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuvj420p(pc), 1280x780 [SAR 19929:21760 DAR 511:340], q=-1--1, 25 fps, 12800 tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=  100 fps=0.0 q=28.0 size=       0kB time=00:00:01.64 bitrate=   0.2kbits/frame=  125 fps=0.0 q=-1.0 Lsize=      90kB time=00:00:04.88 bitrate= 151.7kbits/s speed=6.79x    
video:88kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.618829%
[libx264 @ 0x5580ac186b40] frame I:1     Avg QP:16.31  size: 75247
[libx264 @ 0x5580ac186b40] frame P:31    Avg QP:16.13  size:   314
[libx264 @ 0x5580ac186b40] frame B:93    Avg QP:31.33  size:    49
[libx264 @ 0x5580ac186b40] consecutive B-frames:  0.8%  0.0%  0.0% 99.2%
[libx264 @ 0x5580ac186b40] mb I  I16..4: 10.6% 77.6% 11.8%
[libx264 @ 0x5580ac186b40] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  2.5%  0.2%  0.2%  0.0%  0.0%    skip:97.2%
[libx264 @ 0x5580ac186b40] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.4%  0.0%  0.0%  direct: 0.0%  skip:99.6%  L0: 8.3% L1:91.7% BI: 0.0%
[libx264 @ 0x5580ac186b40] 8x8 transform intra:77.5% inter:98.7%
[libx264 @ 0x5580ac186b40] coded y,uvDC,uvAC intra: 88.4% 95.3% 79.5% inter: 0.1% 0.5% 0.0%
[libx264 @ 0x5580ac186b40] i16 v,h,dc,p:  2%  3%  0% 95%
[libx264 @ 0x5580ac186b40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 18%  7%  6% 11% 10% 10%  8%  8%
[libx264 @ 0x5580ac186b40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 18%  7%  5% 16% 11%  9%  6%  4%
[libx264 @ 0x5580ac186b40] i8c dc,h,v,p: 33% 21% 22% 24%
[libx264 @ 0x5580ac186b40] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x5580ac186b40] ref P L0: 85.7%  0.1% 13.2%  1.0%
[libx264 @ 0x5580ac186b40] ref B L0: 53.6% 46.4%
[libx264 @ 0x5580ac186b40] ref B L1: 92.8%  7.2%
[libx264 @ 0x5580ac186b40] kb/s:143.20
aman@aman:~/Desktop/a$ ffmpeg -loop 1 -i 'https://cdn.pixabay.com/photo/2021/04/17/18/26/woman-6186493__340.jpg' -t 5 -vf scale=1280:780 output.webm
ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix= --prefix=/usr --disable-debug --disable-doc --disable-static --enable-cuda --enable-cuda-sdk --enable-cuvid --enable-libdrm --enable-ffplay --enable-gnutls --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libnpp --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopus --enable-libpulse --enable-sdl2 --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-nonfree --enable-nvenc --enable-omx --enable-openal --enable-opencl --enable-runtime-cpudetect --enable-shared --enable-vaapi --enable-vdpau --enable-version3 --enable-xlib
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, image2, from 'https://cdn.pixabay.com/photo/2021/04/17/18/26/woman-6186493__340.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 5538 kb/s
    Stream #0:0: Video: mjpeg (Progressive), yuvj420p(pc, bt470bg/unknown/unknown), 511x340 [SAR 1:1 DAR 511:340], 25 fps, 25 tbr, 25 tbn, 25 tbc
File 'output.webm' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> vp9 (libvpx-vp9))
Press [q] to stop, [?] for help
[swscaler @ 0x5630553879c0] deprecated pixel format used, make sure you did set range correctly
[libvpx-vp9 @ 0x563054cd2500] v1.7.0
[libvpx-vp9 @ 0x563054cd2500] Neither bitrate nor constrained quality specified, using default CRF of 32
Output #0, webm, to 'output.webm':
  Metadata:
    encoder         : Lavf58.45.100
    Stream #0:0: Video: vp9 (libvpx-vp9), yuv420p, 1280x780 [SAR 19929:21760 DAR 511:340], q=-1--1, 25 fps, 1k tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.91.100 libvpx-vp9
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=   57 fps=0.0 q=0.0 size=       1kB time=00:00:01.28 bitrate=   3.3kbits/sframe=  103 fps=102 q=0.0 size=       1kB time=00:00:03.12 bitrate=   1.3kbits/sframe=  125 fps= 85 q=0.0 Lsize=      51kB time=00:00:04.96 bitrate=  84.0kbits/s speed=3.37x    
video:50kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.571023%


  


• Taking in RTSP stream, converting it to fragmented mp4 using ffmpeg before broadcasting to connected clients through web socket

  24 mars 2023, par Shaun

  I am taking in a live RTSP stream and converting it to fragmented mp4 using ffmpeg before re-distributing it to connected clients via a websocket. The clients will then play it using a normal web browser such as Chrome with Media Source Extensions. Most of the time, the code will work as intended but there will be occasions when the process of parsing the chunks emitted from the ffmpeg stdout will run into some issues. When everything is working well, each chunk of data emitted from ffmpeg will be parsed, sliced and regrouped into either a Initialisation Segment (made up of a FYTP box and a MOOV box) OR a Media Segment (made up of a MOOF box and a MDAT box). The key steps involved are :

  


  

  1. Every byte of data coming out from will first be pushed into an array.

  


  2. Next, I will try to locate the box headers ('FYTP', 'MOOV', 'MOOF', 'MDAT') in the data.

  


  3. After the box headers are located, I will look for the length of each corresponding box (which resides in the first 32 bytes of each box) to locate the start and end of each box.

  


  4. With the box's length, I will then parse the array to filter out the data.

  


  5. Once the entire segment is filtered out, I will send it to all connected clients. For 'FYTP and 'MOOV', they will only be sent once to each client. For 'MOOF' AND 'MDAT', this will be a continuous process for as long as the client(s) are connected.

  


  


  However, when things are not working well, my code will for some unknown reason be unable to slice the segments correctly. During the debugging process, I will notice that the problem will start first with a segment having sliced a few extra bytes more than it should have at the end. This problem will then quickly escalate and the next few segments will go totally haywire.

  


  My suspicion is that this problem has less to do with my code than from the ffmpeg output. Has anyone faced similar problem before ? The following is my code. Any help on this will be much appreciated ! Thank you.

  


  const WebSocket = require("ws");
const { spawn } = require('child_process');
const rtspUrl = "rtsp://localhost:8554/mystream";
const fs = require('fs');
const outputFile = fs.createWriteStream('ffmpeg_output.bin');
const wss = new WebSocket.Server({ port: 4001 });

var buf_chunks_string_holder_array = [];
var initialization_segment_ready_flag = false;
var initialization_segment_to_send = [];
var buffered_media_segment_ready_flag = false;
var buffered_media_segment_to_send = [];
var segment_end_index = { "box_type": "nil", "end_index": 0 };
var next_segment_counter = 0;
var processing_counter_queue = []
var moof_counter = 0;
var mdat_counter = 0;
var checker = '';

wss.on("connection", (ws) => {
    console.log("Client connected");
  if (initialization_segment_ready_flag == true) {
    wss.clients.forEach(client => {
      client.send(new Uint8Array(initialization_segment_to_send).buffer);
    })
  }
  if (buffered_media_segment_ready_flag == true) {
    wss.clients.forEach(client => {
      client.send(new Uint8Array(buffered_media_segment_to_send.buffer));
    })
  }

  ws.on("close", () => {
    console.log("Client disconnected");
  });

  ws.addEventListener("error", (error) => {
    console.error("WebSocket error:", error);
  });

});

const ffmpeg = spawn("ffmpeg", [
  "-rtsp_transport",
  "tcp",
  "-i",
  rtspUrl,
  "-g",
  "10",
  "-bufsize", 
  "50k",
  "-preset",
  "ultrafast",
  "-tune",
  "zerolatency",
  "-c:v",
  "libx264",
  "-c:a",
  "aac",
  '-f',
  'mp4',
  '-movflags',
  'frag_keyframe+empty_moov+default_base_moof',
  '-min_frag_duration',
  '50000',   
  "pipe:1",
]);

function decToHex(dec) {
  return dec.toString(16).padStart(2,'0').toUpperCase();
}

function hexToDec(hex) {
  return parseInt(hex, 16);
}

//This is where the parsing and calculating of the length of each box will take place.
ffmpeg.stdout.on('data', (chunk) => {
  outputFile.write(chunk);
  for (var i=0; i < chunk.length; i ++){
    buf_chunks_string_holder_array.push(chunk[i]);
    checker += decToHex(chunk[i]);
    if(checker.length == 16){
      if (checker.slice(-8) === '66747970'){
        let box_size_string = checker.slice(-16, -8);
        let num_bytes = hexToDec(box_size_string);
        next_segment_counter += num_bytes;
      }
      else if(checker.slice(-8) === '6D6F6F76'){
        let box_size_string = checker.slice(-16, -8);
        let num_bytes = hexToDec(box_size_string);
        next_segment_counter += num_bytes;
        segment_end_index = { "box_type": "ftyp&moov", "end_index": next_segment_counter };
        processing_counter_queue.push(segment_end_index);
        next_segment_counter = 0;
      }
      else if(checker.slice(-8) === '6D6F6F66'){
        let box_size_string = checker.slice(-16, -8);
        let num_bytes = hexToDec(box_size_string);
        next_segment_counter += num_bytes;
        moof_counter ++;      
      }
      else if(checker.slice(-8) === '6D646174'){
        let box_size_string = checker.slice(-16, -8);
        let num_bytes = hexToDec(box_size_string);
        next_segment_counter += num_bytes;
        segment_end_index = { "box_type": "moof&mdat", "end_index": next_segment_counter };
        processing_counter_queue.push(segment_end_index);
        next_segment_counter = 0;
        mdat_counter ++;  
      }
      checker = checker.slice(2);
    }
  }
    //This is where the data will be sliced, grouped into their respective segments and sent to the connected clients.
  if (processing_counter_queue.length > 0) {
    var jobs_removal_counter = 0;
    processing_counter_queue.forEach(job_info => {
      if (job_info.box_type == 'ftyp&moov' && buf_chunks_string_holder_array.length >= job_info.end_index) {
        initialization_segment_to_send = buf_chunks_string_holder_array.slice(0, job_info.end_index);
        initialization_segment_ready_flag = true;
        buf_chunks_string_holder_array = buf_chunks_string_holder_array.slice(job_info.end_index);
        jobs_removal_counter++;
      }
      if (job_info.box_type == 'moof&mdat' && buf_chunks_string_holder_array.length >= job_info.end_index) {
        buffered_media_segment_to_send = buf_chunks_string_holder_array.slice(0, job_info.end_index);
        buffered_media_segment_ready_flag = true;
        buf_chunks_string_holder_array = buf_chunks_string_holder_array.slice(job_info.end_index);
        if (buf_chunks_string_holder_array.length!= 0 ||
          (buf_chunks_string_holder_array[4]!= 102 && buf_chunks_string_holder_array[5]!= 116 && buf_chunks_string_holder_array[6]!= 121 && buf_chunks_string_holder_array[7]!= 112) || 
          (buf_chunks_string_holder_array[4]!= 109 && buf_chunks_string_holder_array[5]!= 100 && buf_chunks_string_holder_array[6]!= 97 && buf_chunks_string_holder_array[7]!= 116)){
          buf_chunks_string_holder_array = [];
          processing_counter_queue = [];
        }
        jobs_removal_counter++;
        if (wss.clients.size >= 1) {
          wss.clients.forEach(client => {
            client.send(new Uint8Array(buffered_media_segment_to_send).buffer);
          })
        }
      } 
      processing_counter_queue = processing_counter_queue.slice(jobs_removal_counter);
    }
    );
  }
});

ffmpeg.stderr.on('data', (data) => {
  console.log(`stderr: ${data}`);
});

ffmpeg.on('close', (code) => {
  console.log(`FFmpeg process exited with code ${code}`);
});


  


• Taking care of silent priming frames converting mp4 to ts ?

  13 février 2019, par keepitterron

  videoOutputSettings = [
  
    AVVideoCodecKey: AVVideoCodecH264,
  
    AVVideoWidthKey: width,
  
    AVVideoHeightKey: height,
  
    AVVideoCompressionPropertiesKey: [
  
      AVVideoAverageBitRateKey: avgBitRate,
  
      AVVideoExpectedSourceFrameRateKey: fps,
  
      AVVideoProfileLevelKey: AVVideoProfileLevelH264BaselineAutoLevel
  
    ]
  
  ]
  
  audioOutputSettings = [
  
    AVFormatIDKey: kAudioFormatMPEG4AAC,
  
    AVSampleRateKey: 44100,
  
    AVNumberOfChannelsKey: 2
  
  ]

  I record a video + audio with AVCaptureSession (screen, camera and mic in OSX) and i encode it with AVAssetWriter (AVFileType.mp4), swapping the writers every 6 seconds.
  Every time a new part is written, a nodeJS app will be notified and using ffmpeg will convert it to ts with

  ffmpeg -y -i generatedFile.mp4 -c copy -copyts -muxdelay 0 -muxpreload 0 outputFile.ts

  I’ll manually write a m3u8 looking like :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-TARGETDURATION:7
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-PLAYLIST-TYPE:VOD
  
  #EXTINF:6.140227,
  
  11214532343c4cae953d45e94a1660ea-0.ts
  
  #EXTINF:6.284218,
  
  11214532343c4cae953d45e94a1660ea-1.ts
  
  #EXTINF:6.099999999999998,
  
  11214532343c4cae953d45e94a1660ea-2.ts
  
  #EXTINF:6.133333,
  
  11214532343c4cae953d45e94a1660ea-3.ts
  
  #EXTINF:6.133333,
  
  11214532343c4cae953d45e94a1660ea-4.ts
  
  #EXTINF:6.100000000000001,
  
  11214532343c4cae953d45e94a1660ea-5.ts
  
  #EXTINF:6.133333,
  
  11214532343c4cae953d45e94a1660ea-6.ts
  
  #EXTINF:6.199999999999996,
  
  11214532343c4cae953d45e94a1660ea-7.ts
  
  #EXTINF:6.0666670000000025,
  
  11214532343c4cae953d45e94a1660ea-8.ts
  
  #EXT-X-ENDLIST

  The issue is : I have audio gaps between parts and I believe is AAC’s priming frames not being handled correctly.
  Am I correct in assuming so ?

  example file

  ❯ afinfo 11.mp4
  
  File:           11.mp4
  
  File type ID:   mp4f
  
  Num Tracks:     1
  
  ----
  
  Data format:     2 ch,  44100 Hz, 'aac ' (0x00000000) 0 bits/channel, 0 bytes/packet, 1024 frames/packet, 0 bytes/frame
  
                  no channel layout.
  
  estimated duration: 6.128617 sec
  
  audio bytes: 87558
  
  audio packets: 266
  
  bit rate: 113407 bits per second
  
  packet size upper bound: 401
  
  maximum packet size: 401
  
  audio data file offset: 577163
  
  optimized
  
  audio 270272 valid frames + 2112 priming + 0 remainder = 272384
  
  format list:
  
  [ 0] format:      2 ch,  44100 Hz, 'aac ' (0x00000000) 0 bits/channel, 0 bytes/packet, 1024 frames/packet, 0 bytes/frame
  
  Channel layout: Stereo (L R)
  
  ----

  example file

  ❯ ffprobe -v error -show_format -show_streams 1.mp4
  
  [STREAM]
  
  index=0
  
  codec_name=h264
  
  codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
  
  profile=Baseline
  
  codec_type=video
  
  codec_time_base=1/60
  
  codec_tag_string=avc1
  
  codec_tag=0x31637661
  
  width=1920
  
  height=1080
  
  coded_width=1920
  
  coded_height=1088
  
  has_b_frames=0
  
  sample_aspect_ratio=1:1
  
  display_aspect_ratio=16:9
  
  pix_fmt=yuv420p
  
  level=40
  
  color_range=tv
  
  color_space=bt709
  
  color_transfer=bt709
  
  color_primaries=bt709
  
  chroma_location=bottom
  
  field_order=unknown
  
  timecode=N/A
  
  refs=1
  
  is_avc=true
  
  nal_length_size=4
  
  id=N/A
  
  r_frame_rate=30/1
  
  avg_frame_rate=30/1
  
  time_base=1/600
  
  start_pts=3600
  
  start_time=6.000000
  
  duration_ts=7260
  
  duration=12.100000
  
  bit_rate=4227137
  
  max_bit_rate=N/A
  
  bits_per_raw_sample=8
  
  nb_frames=183
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  DISPOSITION:timed_thumbnails=0
  
  TAG:creation_time=2019-02-13T13:21:51.000000Z
  
  TAG:language=und
  
  TAG:handler_name=Core Media Video
  
  [/STREAM]
  
  [STREAM]
  
  index=1
  
  codec_name=aac
  
  codec_long_name=AAC (Advanced Audio Coding)
  
  profile=LC
  
  codec_type=audio
  
  codec_time_base=1/44100
  
  codec_tag_string=mp4a
  
  codec_tag=0x6134706d
  
  sample_fmt=fltp
  
  sample_rate=44100
  
  channels=2
  
  channel_layout=stereo
  
  bits_per_sample=0
  
  id=N/A
  
  r_frame_rate=0/0
  
  avg_frame_rate=0/0
  
  time_base=1/44100
  
  start_pts=272991
  
  start_time=6.190272
  
  duration_ts=545352
  
  duration=12.366259
  
  bit_rate=115688
  
  max_bit_rate=128000
  
  bits_per_raw_sample=N/A
  
  nb_frames=269
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  DISPOSITION:timed_thumbnails=0
  
  TAG:creation_time=2019-02-13T13:21:51.000000Z
  
  TAG:language=und
  
  TAG:handler_name=Core Media Audio
  
  [/STREAM]
  
  [FORMAT]
  
  filename=1.mp4
  
  nb_streams=2
  
  nb_programs=0
  
  format_name=mov,mp4,m4a,3gp,3g2,mj2
  
  format_long_name=QuickTime / MOV
  
  start_time=6.000000
  
  duration=12.366259
  
  size=3317034
  
  bit_rate=2145860
  
  probe_score=100
  
  TAG:major_brand=mp42
  
  TAG:minor_version=1
  
  TAG:compatible_brands=mp41mp42isom
  
  TAG:creation_time=2019-02-13T13:21:51.000000Z
  
  [/FORMAT]

  Is there a way I can generate ts files with the encoder delay being taken care of ?