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Sur d’autres sites (13585)

  • Preserving or syncing audio of original video to video fragments

    2 mai 2015, par Code_Ed_Student

    I currently have a few videos that I want to split into EXACTLY 30 seconds segments. I have been able to accomplish but the audio is not being properly preserve. Its out of sync. I tried playing arsample ab and other libraries but I am not getting the desired outuput. What would be the best way to both split the videos in exactly 30 second frames and preserve the audio ?

    ffmpeg -i $file -preset medium -map 0 -segment_time 30 -g 225 -r 25  -sc_threshold 0 -force_key_frames expr:gte(t,n_forced*30) -f segment -movflags faststart -vf scale=-1:720,format=yuv420p -vcodec libx264 -crf 20 -codec:a copy $dir/$video_file-%03d.mp4

    short snippet of output

    Input #0, flv, from '/media/sf_linux_sandbox/hashtag_pull/video-downloads/5b64d7ab-a669-4016-b55e-fe4720cbd843/5b64d7ab-a669-4016-b55e-fe4720cbd843.flv':
    
  Metadata:
    
    moovPosition    : 40
    
    avcprofile      : 77
    
    avclevel        : 31
    
    aacaot          : 2
    
    videoframerate  : 30
    
    audiochannels   : 2
    
    ©too           : Lavf56.15.102
    
    length          : 7334912
    
    sampletype      : mp4a
    
    timescale       : 48000
    
  Duration: 00:02:32.84, start: 0.000000, bitrate: 2690 kb/s
    
    Stream #0:0: Video: h264 (Main), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 30.30 fps, 29.97 tbr, 1k tbn, 59.94 tbc
    
    Stream #0:1: Audio: aac (LC), 48000 Hz, stereo, fltp
    
[libx264 @ 0x3663ba0] using SAR=1/1
    
[libx264 @ 0x3663ba0] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
    
[libx264 @ 0x3663ba0] profile High, level 3.1
    
[libx264 @ 0x3663ba0] 264 - core 144 r2 40bb568 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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=3 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=225 keyint_min=22 scenecut=0 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=20.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, segment, to '/media/sf_linux_sandbox/hashtag_pull/video-edits/30/5b64d7ab-a669-4016-b55e-fe4720cbd843/5b64d7ab-a669-4016-b55e-fe4720cbd843-%03d.mp4':
    
  Metadata:
    
    moovPosition    : 40
    
    avcprofile      : 77
    
    avclevel        : 31
    
    aacaot          : 2
    
    videoframerate  : 30
    
    audiochannels   : 2
    
    ©too           : Lavf56.15.102
    
    length          : 7334912
    
    sampletype      : mp4a
    
    timescale       : 48000
    
    encoder         : Lavf56.16.102
    
    Stream #0:0: Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
    
    Metadata:
    
      encoder         : Lavc56.19.100 libx264
    
    Stream #0:1: Audio: aac, 48000 Hz, stereo
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (copy)

  • error : av_interleaved_write_frame() : Unknown error

    12 avril 2014, par John Qualis

    I am new to ffmpeg. I am trying to stream my webcam using ffmpeg (x264 encoding) on a windows machine to ffserver on a linux server and restream it. I am getting the following error : av_interleaved_write_frame() : Unknown error
    I checked about it on the net and came across mails which said it could be related to version mismatch between ffmpeg and ffserver. I made sure that all libraries that are used by ffmpeg and ffserver have the same version. I am still getting this error. Appreciate any help in solving this issue.

    I am using the following command :

     .\ffmpeg.exe -f dshow -i video="Webcam C170":audio="Microphone (3- Webcam C170)" -an -g 94 -vcodec libx264 -b:v 512k -r 30 -f flv http://AA.BB.CC.DD:8090/feed1.ffm

    I get the followoing errors -

      [dshow @ 0003f240] real-time buffer 101% full! frame dropped!
    
    Last message repeated 1 times
    
No pixel format specified, yuv422p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 02563520] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 02563520] profile High 4:2:2, level 3.0, 4:2:2 8-bit
    
[libx264 @ 02563520] 264 - core 140 r2377 1ca7bb9 - H.264/MPEG-4 AVC codec - Copyleft
    
 2003-2013 - 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 chro
    
ma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 thre
    
ads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compa
    
t=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 o
    
pen_gop=0 weightp=2 keyint=94 keyint_min=9 scenecut=40 intra_refresh=0 rc_lookahead=4
    
0 rc=abr mbtree=1 bitrate=512 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_rat
    
io=1.40 aq=1:1.00
    
Output #0, flv, to 'http://184.173.147.99:8090/feed1.ffm':
    
  Metadata:
    
    encoder         : Lavf55.22.100
    
    Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv422p, 640x480, q=-
    
1--1, 512 kb/s, 1k tbn, 30 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo -> libx264)
    
Press [q] to stop, [?] for help
    
frame=   59 fps=9.0 q=28.0 size=       3kB time=00:00:00.46 bitrate=  58.6kbits/s
    
av_interleaved_write_frame(): Unknown error
    

    
In my /etc/ffserver.conf I have the following settings -
    

    
<feed>
    

    
File /tmp/feed1.ffm
    
##File /mnt/vmtmpfs/feed1.ffm
    
FileMaxSize 50M
    

    
ACL allow 127.0.0.1
    
ACL allow 0.0.0.0 255.255.255.255
    

    
</feed>
    

    
<stream>
    
        Format flv
    
        Feed feed1.ffm
    

    
        VideoCodec libx264
    
        VideoFrameRate 30
    
        VideoBitRate 512
    
        VideoSize 320x240
    
        AVOptionVideo crf 23
    
        AVOptionVideo preset medium
    
        # for more info on crf/preset options, type: x264 --help
    
        AVOptionVideo flags +global_header
    
        # NoAudio
    

    
        AudioCodec aac
    
        Strict -2
    
        AudioBitRate 128
    
        AudioChannels 2
    
        AudioSampleRate 44100
    
        AVOptionAudio flags +global_header
    
        ACL ALLOW 0.0.0.0 255.255.255.255
    
</stream>

  • ffmpeg converting .mkv to .264

    7 novembre 2017, par V. Panchenko

    I want to convert .mkv to .264.
    I try to do it using ffmpeg :

    ffmpeg -i input.mkv -vcodec copy -acodec copy output.264

    It works without errors, but when I try to play output.264 using ffplay :

    ffplay -f h264 -i output.264

    ffplay response is :

    ffplay version N-75924-gd25c033 Copyright (c) 2003-2015 the FFmpeg developers
    
  built with gcc 5.2.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
    
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
    
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
    
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
    
ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
    
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
    
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
    
ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
    
 --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
    
e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
    
ble-decklink --enable-zlib
    
  libavutil      55.  3.100 / 55.  3.100
    
  libavcodec     57.  5.100 / 57.  5.100
    
  libavformat    57.  3.100 / 57.  3.100
    
  libavdevice    57.  0.100 / 57.  0.100
    
  libavfilter     6. 11.100 /  6. 11.100
    
  libswscale      4.  0.100 /  4.  0.100
    
  libswresample   2.  0.100 /  2.  0.100
    
  libpostproc    54.  0.100 / 54.  0.100
    
[h264 @ 03972220] sps_id 24 out of rangeq=    0KB sq=    0B f=0/0
    
[h264 @ 03972220] missing picture in access unit with size 12836207
    
[h264 @ 03972220] data partitioning is not implemented. Update your FFmpeg versi
    
on to the newest one from Git. If the problem still occurs, it means that your f
    
ile has a feature which has not been implemented.
    
[h264 @ 03972220] If you want to help, upload a sample of this file to ftp://upl
    
oad.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-deve
    
l@ffmpeg.org)
    
[h264 @ 03972220] data partitioning is not implemented. Update your FFmpeg versi
    
on to the newest one from Git. If the problem still occurs, it means that your f
    
ile has a feature which has not been implemented.
    
[h264 @ 03972220] If you want to help, upload a sample of this file to ftp://upl
    
oad.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-deve
    
l@ffmpeg.org)
    
[h264 @ 03972220] sps_id 24 out of range
    
[h264 @ 03972220] data partitioning is not implemented. Update your FFmpeg versi
    
on to the newest one from Git. If the problem still occurs, it means that your f
    
ile has a feature which has not been implemented.
    
[h264 @ 03972220] If you want to help, upload a sample of this file to ftp://upl
    
oad.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-deve
    
l@ffmpeg.org)
    
[h264 @ 03972220] no frame!
    
[h264 @ 039696e0] Stream #0: not enough frames to estimate rate; consider increa
    
sing probesize
    
[h264 @ 039696e0] decoding for stream 0 failed
    
[h264 @ 039696e0] Could not find codec parameters for stream 0 (Video: h264, non
    
e): unspecified size
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
Contagion.264: could not find codec parameters

    How I can fix it and convert .mkv to .264 correctly ?

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