Newest 'libx264' Questions - Stack Overflow

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  • x265 Set max NAL/slice size via libx265

    7 juillet 2014, par Roland

    I want to send my encoded NAL packets via UDP as a fast webcam streaming program. Because of the MTU size, I want to set the NAL packets to a max size of around 1390 bytes.

    I've found another response on Stack Overflow explaining that one has to set the i_max_slice_size or something, but this was for x264. I've been trying to find the equivalent for x265 but I cannot see it anywhere.

    I am using the libx265 (using x265.h) library for encoding.

    Can anyone guide me in the right direction please? All help is greatly appreciated!

  • Per macroblock encoding in libx264

    6 juillet 2014, par Wei.M

    I know that in x264 encoding, the process is going on with the unit of macroblock. However, is that possible to set the parameters for each macroblocks? For example, if I want to let the QP of some specific area to be smaller than others. Is that possible? If I need to modify the functions and Apis in libx264, where should I begin?

  • FFmpeg libx264 Llicense

    2 juillet 2014, par user416472

    We have Java Spring application. The application interacts with FFmpeg through Java Runtime.exec() call in order to encode video into mp4 format. Are we ok with the commercial aspect of our application, having in mind that libx264 is released under GPL license, ffmpeg under LGPL license and we are using ffmpeg as external command line utility already installed and hosted on the client's computer?

  • nginx RTMP to HLS : FFMPG error when trying multiple bitrate output [closed]

    28 mai 2014, par user3685074

    I'm currently trying to convert my RTMP Livestream into a HLS with 3 quality-settings.

    I followed this guide

    I've compiled my own FFMPEG and it's working if I just convert 1 file. It seems libx264 isn't able to do multiple encodings at the same time?

    I'm using these command:

            exec /usr/local/bin/ffmpeg -i rtmp://localhost/src/$name 
        -c:a libfdk_aac -b:a 32k   -c:v libx264 -b:v 128K -f flv rtmp://localhost/hls/$name_low 
        -c:a libfdk_aac -b:a 64k   -c:v libx264 -b:v 256K -f flv rtmp://localhost/hls/$name_mid 
        -c:a libfdk_aac -b:a 128k  -c:v libx264 -b:v 512K -f flv rtmp://localhost/hls/$name_hi  2>>/tmp/ffmpeg.log;

    this is the output:

        ffmpeg version N-63519-g61917a1 Copyright (c) 2000-2014 the FFmpeg developers
      built on May 28 2014 18:06:42 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)
      configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-x11grab --enable-libvpx --enable-libmp3lame --enable-librtmp --enable-libspeex --enable-libfdk_aac
      libavutil      52. 87.100 / 52. 87.100
      libavcodec     55. 65.100 / 55. 65.100
      libavformat    55. 41.100 / 55. 41.100
      libavdevice    55. 13.101 / 55. 13.101
      libavfilter     4.  5.100 /  4.  5.100
      libswscale      2.  6.100 /  2.  6.100
      libswresample   0. 19.100 /  0. 19.100
      libpostproc    52.  3.100 / 52.  3.100
    Metadata:
      Server                NGINX RTMP (github.com/arut/nginx-rtmp-module)
      width                 1280.00
      height                720.00
      displayWidth          1280.00
      displayHeight         720.00
      duration              0.00
      framerate             25.00
      fps                   25.00
      videodatarate         390.00
      videocodecid          0.00
      audiodatarate         27.00
      audiocodecid          11.00
    Input #0, flv, from 'rtmp://localhost/src/test':
      Metadata:
        Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
        displayWidth    : 1280
        displayHeight   : 720
        fps             : 25
        profile         : 
        level           : 
      Duration: 00:00:00.00, start: 0.080000, bitrate: N/A
        Stream #0:0: Video: h264 (High), yuv420p, 1280x720, 399 kb/s, 25 fps, 25 tbr, 1k tbn, 50 tbc
        Stream #0:1: Audio: speex, 16000 Hz, mono, s16, 27 kb/s
    [libx264 @ 0x5260380] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
    [libx264 @ 0x5260380] profile High, level 3.1
    [libx264 @ 0x5260380] 264 - core 142 r2431 f23da7c - 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=24 lookahead_threads=4 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=abr mbtree=1 bitrate=128 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    [libx264 @ 0x525a920] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
    Output #0, flv, to 'rtmp://localhost/hls/test_low':
      Metadata:
        Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
        displayWidth    : 1280
        displayHeight   : 720
        fps             : 25
        profile         : 
        level           : 
        Stream #0:0: Video: h264 (libx264), yuv420p, 1280x720, q=-1--1, 128 kb/s, 25 fps, 90k tbn, 25 tbc
        Metadata:
          encoder         : Lavc55.65.100 libx264
        Stream #0:1: Audio: aac (libfdk_aac), 16000 Hz, mono, s16, 32 kb/s
        Metadata:
          encoder         : Lavc55.65.100 libfdk_aac
    Output #1, flv, to 'rtmp://localhost/hls/test_mid':
      Metadata:
        Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
        displayWidth    : 1280
        displayHeight   : 720
        fps             : 25
        profile         : 
        level           : 
        Stream #1:0: Video: h264, yuv420p, 1280x720, q=-1--1, 256 kb/s, 25 fps, 90k tbn, 25 tbc
        Metadata:
          encoder         : Lavc55.65.100 libx264
        Stream #1:1: Audio: aac, 16000 Hz, mono, s16
        Metadata:
          encoder         : Lavc55.65.100 libfdk_aac
    Output #2, flv, to 'rtmp://localhost/hls/test_hi':
      Metadata:
        Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
        displayWidth    : 1280
        displayHeight   : 720
        fps             : 25
        profile         : 
        level           : 
        Stream #2:0: Video: h264, yuv420p, 1280x720, q=-1--1, 25 fps, 90k tbn, 25 tbc
        Metadata:
          encoder         : Lavc55.65.100 libx264
        Stream #2:1: Audio: aac, 16000 Hz, mono, s16
        Metadata:
          encoder         : Lavc55.65.100 libfdk_aac
    Stream mapping:
      Stream #0:0 -> #0:0 (h264 -> libx264)
      Stream #0:1 -> #0:1 (libspeex -> libfdk_aac)
      Stream #0:0 -> #1:0 (h264 -> libx264)
      Stream #0:1 -> #1:1 (libspeex -> libfdk_aac)
      Stream #0:0 -> #2:0 (h264 -> libx264)
      Stream #0:1 -> #2:1 (libspeex -> libfdk_aac)
    Error while opening encoder for output stream #1:0 - maybe incorrect parameters such as bit_rate, rate, width or height

    I hope you can help me and sorry for my bad english.

    Greetz Kevin

  • avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet), the frameFinished is 0 most of the time why ?

    26 mai 2014, par Whoami

    I received a packet from rtsp by av_read_frame and decode it through 

    avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet)

    After decoding i am checking the value of frameFinished.

    Most of the time i get the value of frameFinished is zero. May be around 50% of the packet.

    Could you kindly hint me what could be the reason ?

    is this issue in any way related to 'I', 'P', 'B' packet types ?

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