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• ffmpeg - HLS stream audio error between segmets

  2 février 2019, par Carl

  I have a huge amount of mp4 files to create HLS segments from, more than 200 hours worth of files. I don’t see the point of re-encoding these videos because they are already in mp4 format. I’m using the following command which copies the video into segments instead of encoding it again.

  ffmpeg -i filename.mp4 -codec: copy -start_number 0 -hls_time 4 -hls_list_size 0 -f hls filename.m3u8

  The problem is when it comes to stitching these segments, I’m getting micro audio errors between segments. It’s hard to explain but imagine somebody turning audio off for 0.1 seconds. I doesn’t happen in all of the segments but in 20%-30% of them. Is there anything I can do stop these errors from popping up apart from reencoding all the videos. There are no problems with video btw.

  Here’s media info from one of the files :

  General
  Complete name : C :\video_test\video_file.mp4
  Format : MPEG-4
  Format profile : Base Media / Version 2
  Codec ID : mp42 (isom/iso2/avc1/mp41/mp42)
  File size : 45.7 MiB
  Duration : 7 min 34 s
  Overall bit rate mode : Variable
  Overall bit rate : 844 kb/s
  Writing application : Lavf53.32.100
  

  Video
  ID : 1
  Format : AVC
  Format/Info : Advanced Video Codec
  Format profile : High@L4
  Format settings, CABAC : Yes
  Format settings, RefFrames : 8 frames
  Codec ID : avc1
  Codec ID/Info : Advanced Video Coding
  Duration : 7 min 34 s
  Bit rate : 767 kb/s
  Width : 1 280 pixels
  Height : 720 pixels
  Display aspect ratio : 16:9
  Frame rate mode : Constant
  Frame rate : 30.000 FPS
  Color space : YUV
  Chroma subsampling : 4:2:0
  Bit depth : 8 bits
  Scan type : Progressive
  Bits/(Pixel*Frame) : 0.028
  Stream size : 41.5 MiB (91%)
  Writing library : x264 core 136
  Encoding settings : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=6 / psy=0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=48 / lookahead_threads=5 / 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=0 / keyint=60 / keyint_min=30 / scenecut=0 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

  Audio
  ID : 2
  Format : AAC
  Format/Info : Advanced Audio Codec
  Format profile : LC
  Codec ID : 40
  Duration : 7 min 34 s
  Bit rate mode : Variable
  Bit rate : 72.0 kb/s
  Maximum bit rate : 96.0 kb/s
  Channel(s) : 2 channels
  Channel positions : Front : L R
  Sampling rate : 44.1 kHz
  Frame rate : 43.066 FPS (1024 SPF)
  Compression mode : Lossy
  Stream size : 3.92 MiB (9%)
  Language : English
  Default : Yes
  Alternate group : 1
  

  Edit : I just tried copying video and reencoding the audio with the following command but problem still persists.

  ffmpeg -i filename.mp4 -vcodec copy -c:a aac -ar 48000 -b:a 128k -start_number 0 -hls_time 4 -hls_list_size 0  -f hls filename.m3u8

• Can not download a streamable m3u8 link with IDM and ffmpeg

  15 juillet 2021, par long

  This is the link : https://v13.phephim.xyz/vod/v2/packaged:mp4/6005b3591918ee01c9ef67e4/playlist.m3u8

  


  It's ok to play the link with play-hls-m3u8 chrome extension or by the site https://www.hlsplayer.net/ but I got errors when trying to download it by ffmpeg :

  


  ffmpeg -i https://v13.phephim.xyz/vod/v2/packaged:mp4/6005b3591918ee01c9ef67e4/playlist.m3u8 -c copy OUTPUT.MP4


  


  Full log :

  


     ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  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
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[hls @ 0x561c95a74c40] Skip ('#EXT-X-VERSION:3')
[hls @ 0x561c95a74c40] Opening 'https://v13.phephim.xyz/vod/v2/packaged:mp4/6005b3591918ee01c9ef67e4/0.ts?e=ad32a6dc7559f830a29b88ca30b975d90daef6578a563b09e97c798063c39de9fc124d470f75ad0220b9f440b7bd6767' for reading
[hls @ 0x561c95a74c40] Opening 'https://v13.phephim.xyz/vod/v2/packaged:mp4/6005b3591918ee01c9ef67e4/1.ts?e=e9b0a737f46906cdb4d67aed95e65ae4ab8eb401100eebce4e711ffdaf43c68fc2d8a49add4295587b38fe90c9d4cf86' for reading
[hls @ 0x561c95a74c40] Could not find codec parameters for stream 0 (Video: png, none(pc)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, hls, from 'https://v13.phephim.xyz/vod/v2/packaged:mp4/6005b3591918ee01c9ef67e4/playlist.m3u8':
  Duration: 01:02:06.42, bitrate: 0 kb/s
  Program 0 
    Metadata:
      variant_bitrate : 0
    Stream #0:0: Video: png, none(pc), 25 tbr, 25 tbn, 25 tbc
    Metadata:
      variant_bitrate : 0
Output #0, mp4, to 'OUTPUT.MP4':
Output file #0 does not contain any stream


  


  I have tried to add some other command options but still got the same errors.

  


  Doing devtools inspect, I found
the .ts segment link redirected to another link that has the response header :

  


  content-disposition: inline;filename="unnamed.png"
content-type: image/png


  


  Is it normal ?

  


  Image : response header

  


  Pls help me to download the video. Thanks !

  


  p/s : sorry for my bad english :)

  


• Add SRT subtitle to video with ffmpeg [closed]

  28 décembre 2024, par jAckOdE

  I use ffmpeg to encode, and add subtitle to a video by following command

  


  $ ffmpeg -i hifi.avi -i hifi.srt -acodec libfaac -ar 48000 -ab 128k -ac 2 -vcodec libx264 -vpre ipod640 -s 480x240 -b 256k -scodec copy  hifi.m4v -newsubtitle


  


  Here is the output

  


  ffmpeg version 0.8.git, Copyright (c) 2000-2011 the FFmpeg developers
  built on Aug  4 2011 11:11:39 with gcc 4.5.2
  configuration: --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib --disable-shared --enable-static --enable-gpl --enable-postproc --enable-pthreads --enable-ffplay --disable-ffserver --enable-memalign-hack --enable-nonfree --enable-libfaac --arch=x86 --enable-swscale --enable-libx264 --enable-avfilter --enable-debug=3
  libavutil    51. 11. 1 / 51. 11. 1
  libavcodec   53.  9. 1 / 53.  9. 1
  libavformat  53.  6. 0 / 53.  6. 0
  libavdevice  53.  2. 0 / 53.  2. 0
  libavfilter   2. 27. 5 /  2. 27. 5
  libswscale    2.  0. 0 /  2.  0. 0
  libpostproc  51.  2. 0 / 51.  2. 0
Input #0, avi, from 'hifi.avi':
  Metadata:
    encoder         : VirtualDubMod 1.5.4.1 (build 2178/release)
    IAS1            : English
  Duration: 01:49:02.20, start: 0.000000, bitrate: 897 kb/s
    Stream #0.0: Video: mpeg4 (Simple Profile), yuv420p, 544x304 [SAR 1:1 DAR 34:19], 25 tbr, 25 tbn, 25 tbc
    Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 32 kb/s
[srt @ 0152c100] Estimating duration from bitrate, this may be inaccurate
Input #1, srt, from 'hifi.srt':
  Duration: N/A, start: 56.080000, bitrate: N/A
    Stream #1.0: Subtitle: srt
File 'hifi.m4v' already exists. Overwrite ? [y/N] y
[buffer @ 02548920] w:544 h:304 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
[scale @ 02558ee0] w:544 h:304 fmt:yuv420p -> w:480 h:240 fmt:yuv420p flags:0x4
[libx264 @ 02547f20] Default settings detected, using medium profile
[libx264 @ 02547f20] using SAR=1/1
[libx264 @ 02547f20] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
[libx264 @ 02547f20] profile High, level 3.0
[libx264 @ 02547f20] 264 - core 115 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - 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=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=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=256 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=10000 vbv_bufsize=10000 nal_hrd=none ip_ratio=1.40 aq=1:1.00
Output #0, ipod, to 'hifi.m4v':
    Stream #0.0: Video: libx264, yuv420p, 480x240 [SAR 1:1 DAR 2:1], q=2-31, 256 kb/s, 90k tbn, 25 tbc
    Stream #0.1: Audio: libfaac, 48000 Hz, 2 channels, s16, 128 kb/s
    Stream #0.2: Subtitle: srt
    Stream #0.3: Subtitle: [0][0][0][0] / 0x0000, 64 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
  Stream #1.0 -> #0.2
  Stream #1.0 -> #0.3
Encoder (codec id 0) not found for output stream #0.3


  


  Can anyone tell what is wrong with my command ?