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  • avfilter/drawutils : add support for full range

    2 mai 2018, par Paul B Mahol
    avfilter/drawutils : add support for full range

    Signed-off-by : Paul B Mahol <onemda@gmail.com>
    • [DH] libavfilter/drawutils.c
    • [DH] libavfilter/drawutils.h
    • [DH] libavutil/colorspace.h
    • [DH] tests/ref/fate/filter-pixfmts-pad

  • FFMPEG : Fixing frame rate with filter_complex movie filter

    4 mai 2018, par stevendesu

    With some help from @Gyan I came up with the following FFMPEG command which streams 4 videos simultaneously to 4 separate RTMP endpoints, looping the videos infinitely and keeping the audio and video synchronized :

    ffmpeg \
    
    -filter_complex \
    
        "movie=01.mp4:loop=0[v1];[v1]setpts=N/FRAME_RATE/TB[v1];
    
         amovie=01.mp4:loop=0[a1];[a1]asetpts=N/SR/TB[a1];
    
         movie=02.mp4:loop=0[v2];[v2]setpts=N/FRAME_RATE/TB[v2];
    
         amovie=02.mp4:loop=0[a2];[a2]asetpts=N/SR/TB[a2];
    
         movie=03.mp4:loop=0[v3];[v3]setpts=N/FRAME_RATE/TB[v3];
    
         amovie=03.mp4:loop=0[a3];[a3]asetpts=N/SR/TB[a3];
    
         movie=04.mp4:loop=0[v4];[v4]setpts=N/FRAME_RATE/TB[v4];
    
         amovie=04.mp4:loop=0[a4];[a4]asetpts=N/SR/TB[a4]" \
    
    -map "[v1]" -map "[a1]" \
    
        -c:a libfdk_aac \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/01 \
    
    -map "[v2]" -map "[a2]" \
    
        -c:a libfdk_aac \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/02 \
    
    -map "[v3]" -map "[a3]" \
    
        -c:a libfdk_aac \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/03 \
    
    -map "[v4]" -map "[a4]" \
    
        -c:a libfdk_aac \
    
        -c:v libx264 -preset ultrafast \
    
        -b:v 500k -b:a 32k \
    
        -f flv rtmp://output/04

    This is almost perfect, except that it’s doubling my frame rate :

    frame=20822 fps= 46 q=32.0 q=34.0 q=29.0 q=32.0 size=   57617kB time=00:14:28.39 bitrate= 543.5kbits/s speed=1.92x

    Note the speed=1.92x bit. This is causing the live stream to play at double speed, as well.

    (the original video was approximately 24 fps)

  • avcodec/mediacodecdec : wait on first frame after input buffers are full

    25 avril 2018, par Aman Gupta
    avcodec/mediacodecdec : wait on first frame after input buffers are full

    The output_buffer_count==0 special case is no longer required, and
    
can cause spurious EAGAIN to surface to the user when input buffers
    
are filled up. Since the caller now knows if the decoder is accepting
    
new input (via current_input_buffer>=0), let the wait parameter
    
control whether we block or not.
    

    Signed-off-by : Aman Gupta <aman@tmm1.net>
    
Signed-off-by : Matthieu Bouron <matthieu.bouron@gmail.com>
    • [DH] libavcodec/mediacodecdec_common.c
    • [DH] libavcodec/mediacodecdec_common.h

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