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• FFMPEG/AVCONV Video flipping is taking long time, How can we reduce the process time?

  10 July 2014, by Prasanth P

  I am trying to flip video using FFMPEG/AVCONV on Ubuntu. When it flips 1 minute video, it takes 12 to 40 seconds for processing and conversion.

  ffmpeg is deprecated and avconv is being using instead.

  Video file size : 7mb, Duration : 1 minute

  avconv -i 1_1.mp4 -c:v libx264 -c:a copy -vf "vflip" conv.mp4

  and the result is:

  avconv version 0.8.12-4:0.8.12-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers
  
    built on Jun 10 2014 15:32:44 with gcc 4.6.3
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1_1.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp42mp41
  
      creation_time   : 2013-06-06 07:42:07
  
    Duration: 00:03:45.15, start: 0.000000, bitrate: 266 kb/s
  
      Stream #0.0(eng): Video: h264 (High), yuv420p, 640x360 [PAR 1:1 DAR 16:9], 216 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc
  
      Metadata:
  
        creation_time   : 2013-06-06 07:42:07
  
      Stream #0.1(eng): Audio: aac, 32000 Hz, mono, s16, 46 kb/s
  
      Metadata:
  
        creation_time   : 2013-06-06 07:42:07
  
  [buffer @ 0x972c240] w:640 h:360 pixfmt:yuv420p
  
  [libx264 @ 0x9745e20] using SAR=1/1
  
  [libx264 @ 0x9745e20] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0x9745e20] profile Main, level 3.0
  
  [libx264 @ 0x9745e20] 264 - core 120 r2151 a3f4407 - 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=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=1 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=1.25 aq=1:1.00
  
  Output #0, mp4, to 'conv.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp42mp41
  
      creation_time   : 2013-06-06 07:42:07
  
      encoder         : Lavf53.21.1
  
      Stream #0.0(eng): Video: libx264, yuv420p, 640x360 [PAR 1:1 DAR 16:9], q=-1--1, 25 tbn, 25 tbc
  
      Metadata:
  
        creation_time   : 2013-06-06 07:42:07
  
      Stream #0.1(eng): Audio: libvo_aacenc, 32000 Hz, mono, 46 kb/s
  
      Metadata:
  
        creation_time   : 2013-06-06 07:42:07
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press ctrl-c to stop encoding
  
  frame= 5627 fps=153 q=-1.0 Lsize=    7880kB time=225.04 bitrate= 286.9kbits/s    
  
  video:6487kB audio:1271kB global headers:0kB muxing overhead 1.580010%
  
  [libx264 @ 0x9745e20] frame I:27    Avg QP:15.59  size: 19598
  
  [libx264 @ 0x9745e20] frame P:1478  Avg QP:20.11  size:  3175
  
  [libx264 @ 0x9745e20] frame B:4122  Avg QP:29.13  size:   344
  
  [libx264 @ 0x9745e20] consecutive B-frames:  1.9%  0.5%  2.1% 95.5%
  
  [libx264 @ 0x9745e20] mb I  I16..4: 20.1%  0.0% 79.9%
  
  [libx264 @ 0x9745e20] mb P  I16..4:  1.2%  0.0%  1.7%  P16..4: 23.9% 12.3%  5.6%  0.0%  0.0%    skip:55.2%
  
  [libx264 @ 0x9745e20] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8: 18.4%  2.3%  0.2%  direct: 0.3%  skip:78.8%  L0:41.7% L1:51.7% BI: 6.6%
  
  [libx264 @ 0x9745e20] coded y,uvDC,uvAC intra: 64.4% 44.0% 15.7% inter: 4.3% 4.8% 0.2%
  
  [libx264 @ 0x9745e20] i16 v,h,dc,p: 40% 19% 13% 28%
  
  [libx264 @ 0x9745e20] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 22% 17%  5%  7%  6%  6%  5%  4%
  
  [libx264 @ 0x9745e20] i8c dc,h,v,p: 65% 13% 19%  3%
  
  [libx264 @ 0x9745e20] Weighted P-Frames: Y:1.9% UV:1.2%
  
  [libx264 @ 0x9745e20] ref P L0: 72.8%  7.2% 13.5%  6.4%  0.0%
  
  [libx264 @ 0x9745e20] ref B L0: 91.2%  8.8%
  
  [libx264 @ 0x9745e20] kb/s:236.07

  And time taken is 13 seconds.

• Add SRT subtitle to video with ffmpeg

  3 July 2015, by 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 wrong with my command??

  thanks,

• How can I play libvorbis(ogg) streams using ffplay received with udp?

  31 March 2017, by crisman

  ffmpeg

  ffmpeg -f dshow -i audio="virtual-audio-capturer" -codec:a libvorbis -b:a 128k -ac 2 -ar 48000 -f mpegts udp://127.0.0.1:1111

  ffplay

  ffplay -codec:a libvorbis -b:a 128k -ar 48000 -ac 2 udp://127.0.0.1:1111

  not playing audio.

  ---

  Other codecs play back working, example below.

  aac working

  ffmpeg -f dshow -i audio="virtual-audio-capturer" -codec:a aac -b:a 128k -ac 2 -ar 48000 -f mpegts udp://127.0.0.1:1111
  
  ffplay -codec:a aac -b:a 128k -ar 48000 -ac 2 udp://127.0.0.1:1111

  opus codec working

  ffmpeg -f dshow -i audio="virtual-audio-capturer" -codec:a libopus -b:a 128k -ac 2 -ar 48000 -f mpegts udp://127.0.0.1:1111
  
  ffplay -codec:a libopus -b:a 128k -ar 48000 -ac 2 udp://127.0.0.1:1111

  mp3 working

  ffmpeg -f dshow -i audio="virtual-audio-capturer" -codec:a mp3 -b:a 128k -ac 2 -ar 48000 -f mpegts udp://127.0.0.1:1111
  
  ffplay -codec:a mp3 -b:a 128k -ar 48000 -ac 2 udp://127.0.0.1:1111

  ---

  why libvorbis not working?

  transport success, but can not play, i think.

  // not woring ffplay displayed log
  
  ffplay.exe -loglevel debug -codec:a vorbis -b:a 128k -ar 48000 -ac 2 -sync audio -i udp://127.0.0.1:1111
  
  ffplay version N-83781-g3016e91 Copyright (c) 2003-2017 the FFmpeg developers
  
  built with gcc 6.3.0 (GCC)
  
  configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
  libavutil 55. 48.100 / 55. 48.100
  
  libavcodec 57. 82.102 / 57. 82.102
  
  libavformat 57. 66.103 / 57. 66.103
  
  libavdevice 57. 3.100 / 57. 3.100
  
  libavfilter 6. 74.100 / 6. 74.100
  
  libswscale 4. 3.101 / 4. 3.101
  
  libswresample 2. 4.100 / 2. 4.100
  
  libpostproc 54. 2.100 / 54. 2.100
  
  [udp @ 0000000000b68700] No default whitelist set sq= 0B f=0/0
  
  [udp @ 0000000000b68700] end receive buffer size reported is 65536
  
  [mpegts @ 0000000000b68ac0] Format mpegts probed with size=2048 and score=50
  
  [mpegts @ 0000000000b68ac0] stream=0 stream_type=6 pid=100 prog_reg_desc=
  
  [mpegts @ 0000000000b68ac0] Before avformat_find_stream_info() pos: 0 bytes read:8208 seeks:0 nb_streams:1
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2500
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2499
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2498
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2497
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2496
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2495
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2494= 0B f=0/0
  
  [mpegts @ 0000000000b68ac0] Probe with size=10038, packets=7 detected mp3 with score=1
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2493= 0B f=0/0
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2492= 0B f=0/0
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2491= 0B f=0/0
  
  [mpegts @ 0000000000b68ac0] Probe with size=18321, packets=10 detected mp3 with score=1
  
  [mpegts @ 0000000000b68ac0] probing stream 0 pp:2490= 0B f=0/0