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Sur d’autres sites (6371)

  • V4l2 to RTSP stream using FFmpeg library ver 5.1

    10 août 2022, par wolverin

    Trying to transcode MJPEG in /dev/video0 to H264 RTSP server

    


    The MJPEG packet is read correctly, transcoded by the procedure below without errors

    


    BUT the image is corrupted after the middle of the picture and freezes

    


    1

    


    int WriteStream()
{
    int rt = 0;
    int64_t time_start = av_gettime_relative();

    if ((rt = avcodec_send_packet(pInpCdcCtx, pInpPkt)) < 0)
        goto ERROR;

    do {
        rt = avcodec_receive_frame(pInpCdcCtx, pInpFrm);
        if (rt == AVERROR_EOF || rt == AVERROR(EAGAIN))
            break;
        else if (rt < 0)
            goto ERROR_FRM;

int64_t time_dec = av_gettime_relative();

        if (pSwsCtx) /* it is NOT USED now because it is very slow, WHY???  and pOutFrm = pInpFrm */
        {
            pOutFrm->pts = pInpFrm->pts;

            sws_scale(pSwsCtx,
                    (const uint8_t * const *) pInpFrm->data, pInpFrm->linesize, 0, pInpCdcCtx->height,
                    pOutFrm->data, pOutFrm->linesize);
        }
        else
        {
            pInpFrm->key_frame = 0;
            pInpFrm->pict_type = AV_PICTURE_TYPE_NONE;
        }

int64_t time_sws = av_gettime_relative();


        if ((rt = avcodec_send_frame(pOutCdcCtx, pOutFrm)) < 0)
            goto ERROR_FRM;

        do {
            rt = avcodec_receive_packet(pOutCdcCtx, pOutPkt);
            if (rt == AVERROR_EOF || rt == AVERROR(EAGAIN))
                break;
            else if (rt < 0)
                goto ERROR_PKT;

int64_t time_enc = av_gettime_relative();

            fprintf(stdout, "Packet size inp: %d out: %d bytes Time decode: %.2f scale: %.2f encode: %.2f transcode: %.2f ms ...\r",
                            pInpPkt->size, pOutPkt->size, (time_dec - time_start)/1000.0, (time_sws - time_dec)/1000.0, (time_enc - time_sws)/1000.0, (av_gettime_relative() - time_start)/1000.0);

            rt = av_interleaved_write_frame(pOutFmtCtx, pOutPkt);

            av_packet_unref(pOutPkt);
        } while (rt >= 0);

        av_frame_unref(pInpFrm);
    } while (rt >= 0);
    return 0;

ERROR_PKT:
    av_packet_unref(pOutPkt);
ERROR_FRM:
    av_frame_unref(pInpFrm);
ERROR:
    PrintError("Error transcoding", rt);
    return rt;
}


    


    The dump looks like this

    


    Input #0, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, start: 20815.488118, bitrate: N/A
  Stream #0:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 640x480, 30 fps, 30 tbr, 1000k tbn
[libx264 @ 0x14e12c0] using cpu capabilities: ARMv6 NEON
[libx264 @ 0x14e12c0] profile High 4:2:2, level 3.0, 4:2:2 8-bit
[libx264 @ 0x14e12c0] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=4 lookahead_threads=4 sliced_threads=1 slices=4 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc_lookahead=0 rc=cbr mbtree=0 bitrate=500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=500 vbv_bufsize=1000 nal_hrd=none filler=0 ip_ratio=1.40 aq=0
Output #0, rtsp, to 'rtsp://127.0.0.1:554/cam':
  Stream #0:0: Video: h264, yuv422p(tv, bt470bg/unknown/unknown), 640x480, q=2-31, 500 kb/s, 30 tbr, 90k tbn


    


    The app itself is working fine

    


    ./ffmpeg -f v4l2 -input_format mjpeg -video_size 640x480 -i /dev/video0 -c:v libx264 -pix_fmt yuv422p -preset ultrafast -r 30 -b:v 500k -minrate:v 300k -maxrate:v 500k -bufsize 1000k -f rtsp -rtsp_transport udp rtsp ://192.168.36.212:554/cam

    


    maybe somehow it is necessary to set pts, dts and pkt_pos ?

    


  • ffmpeg overlay png on mp4 on specific time

    2 octobre 2018, par Lina Sharifi Moghaddam

    I am trying to overlay an image on mp4 video from second 3 to the end.
    I am using the below

    ffmpeg -i out.mp4 -i scaledSquare.png -filter_complex " [0:v][1] overlay=100:100:enable=’gte(t,3)’" -y test.mp4

    Output is a below, test.mp4 does not have the overlayed shape

    ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
    
  libavutil      56. 14.100 / 56. 14.100
    
  libavcodec     58. 18.100 / 58. 18.100
    
  libavformat    58. 12.100 / 58. 12.100
    
  libavdevice    58.  3.100 / 58.  3.100
    
  libavfilter     7. 16.100 /  7. 16.100
    
  libavresample   4.  0.  0 /  4.  0.  0
    
  libswscale      5.  1.100 /  5.  1.100
    
  libswresample   3.  1.100 /  3.  1.100
    
  libpostproc    55.  1.100 / 55.  1.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.12.100
    
  Duration: 00:00:05.43, start: 0.000000, bitrate: 372 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 3360x2100 [SAR 1:1 DAR 8:5], 40214 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 73 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Input #1, png_pipe, from 'scaledSquare.png':
    
  Duration: N/A, bitrate: N/A
    
    Stream #1:0: Video: png, rgba(pc), 900x450 [SAR 1:2 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:0 (h264) -> overlay:main (graph 0)
    
  Stream #1:0 (png) -> overlay:overlay (graph 0)
    
  overlay (graph 0) -> Stream #0:0 (libx264)
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x7f95f0001800] using SAR=1/1
    
[libx264 @ 0x7f95f0001800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 0x7f95f0001800] profile High, level 5.1
    
[libx264 @ 0x7f95f0001800] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=12 lookahead_threads=2 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=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'test.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.12.100
    
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 3360x2100 [SAR 1:1 DAR 8:5], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      encoder         : Lavc58.18.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 69 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
      encoder         : Lavc58.18.100 aac
    
frame=    1 fps=0.0 q=28.0 Lsize=     246kB time=00:00:05.38 bitrate= 374.4kbits/s speed=18.4x    
    
video:195kB audio:49kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.736449%
    
[libx264 @ 0x7f95f0001800] frame I:1     Avg QP:27.64  size:199019
    
[libx264 @ 0x7f95f0001800] mb I  I16..4: 21.9% 56.5% 21.6%
    
[libx264 @ 0x7f95f0001800] 8x8 transform intra:56.5%
    
[libx264 @ 0x7f95f0001800] coded y,uvDC,uvAC intra: 15.5% 0.6% 0.5%
    
[libx264 @ 0x7f95f0001800] i16 v,h,dc,p: 25% 75%  0%  0%
    
[libx264 @ 0x7f95f0001800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 76%  9% 14%  0%  0%  0%  0%  0%  0%
    
[libx264 @ 0x7f95f0001800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 41% 27%  9%  2%  4%  4%  5%  3%  5%
    
[libx264 @ 0x7f95f0001800] i8c dc,h,v,p: 97%  3%  0%  0%
    
[libx264 @ 0x7f95f0001800] kb/s:39803.80
    
[aac @ 0x7f95f0003000] Qavg: 4519.618

    But if I remove the enable option, the shaped is overlayed for the whole duration of the video properly :

    ffmpeg -i out.mp4 -i scaledSquare.png -filter_complex " [0:v][1] overlay=100:100" -y test2.mp4

    ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
    
  libavutil      56. 14.100 / 56. 14.100
    
  libavcodec     58. 18.100 / 58. 18.100
    
  libavformat    58. 12.100 / 58. 12.100
    
  libavdevice    58.  3.100 / 58.  3.100
    
  libavfilter     7. 16.100 /  7. 16.100
    
  libavresample   4.  0.  0 /  4.  0.  0
    
  libswscale      5.  1.100 /  5.  1.100
    
  libswresample   3.  1.100 /  3.  1.100
    
  libpostproc    55.  1.100 / 55.  1.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.12.100
    
  Duration: 00:00:05.43, start: 0.000000, bitrate: 372 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 3360x2100 [SAR 1:1 DAR 8:5], 40214 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 73 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Input #1, png_pipe, from 'scaledSquare.png':
    
  Duration: N/A, bitrate: N/A
    
    Stream #1:0: Video: png, rgba(pc), 900x450 [SAR 1:2 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:0 (h264) -> overlay:main (graph 0)
    
  Stream #1:0 (png) -> overlay:overlay (graph 0)
    
  overlay (graph 0) -> Stream #0:0 (libx264)
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x7fb361801800] using SAR=1/1
    
[libx264 @ 0x7fb361801800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 0x7fb361801800] profile High, level 5.1
    
[libx264 @ 0x7fb361801800] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=12 lookahead_threads=2 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=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'test2.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.12.100
    
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 3360x2100 [SAR 1:1 DAR 8:5], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      encoder         : Lavc58.18.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 69 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
      encoder         : Lavc58.18.100 aac
    
frame=    1 fps=0.0 q=28.0 Lsize=     244kB time=00:00:05.38 bitrate= 370.6kbits/s speed=20.8x    
    
video:193kB audio:49kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.744060%
    
[libx264 @ 0x7fb361801800] frame I:1     Avg QP:27.56  size:196459
    
[libx264 @ 0x7fb361801800] mb I  I16..4: 23.5% 55.3% 21.2%
    
[libx264 @ 0x7fb361801800] 8x8 transform intra:55.3%
    
[libx264 @ 0x7fb361801800] coded y,uvDC,uvAC intra: 15.4% 0.8% 0.6%
    
[libx264 @ 0x7fb361801800] i16 v,h,dc,p: 23% 76%  0%  0%
    
[libx264 @ 0x7fb361801800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 79%  8% 12%  0%  0%  0%  0%  0%  1%
    
[libx264 @ 0x7fb361801800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 42% 27%  8%  2%  4%  4%  5%  3%  5%
    
[libx264 @ 0x7fb361801800] i8c dc,h,v,p: 95%  4%  1%  0%
    
[libx264 @ 0x7fb361801800] kb/s:39291.80
    
[aac @ 0x7fb361804a00] Qavg: 4519.618

    as additional test I did :

    ffmpeg -i out.mp4 -i scaledSquare.png -filter_complex " [0:v][1] overlay=100:100:enable=’gte(t,0)’" -y test3.mp4

    which supposed to add the shape from all times greater than 0, which works fine , shape is getting added for the whole duration of output.

    So I am not sure why the enable option does not work when I specify something like enable=’gte(t,3)’ or enable=’between(t,1,3)’ here.

    and just for additional information :
    I created the original mp4 file (out.mp4) by adding an mp3 file to one png image as below

    ffmpeg -i images/08.png -i audio_123e4567-e89b-12d3-a456-426655440000.mp3 -pix_fmt yuv420p out.mp4

  • file input from http (url) in melt plugin

    26 décembre 2017, par Anuj TBE

    I’m using MELT plugin for generating crossfade animation using series of images.

    I found the corssfade animation script from here.

    and the script is

    melt -verbose \
    
-profile atsc_720p_25 \
    
001.png out=50 \
    
002.png out=75 -mix 25 -mixer luma \
    
003.png out=75 -mix 25 -mixer luma \
    
004.png out=75 -mix 25 -mixer luma \
    
005.png out=75 -mix 25 -mixer luma \
    
-consumer avformat:output.mp4 vcodec=libx264 an=1

    But instead of providing file from local path, I want to use http url like

    melt -verbose \
    
-profile atsc_720p_25 \
    
http://example.com/image1.jpg out=50 \
    
http://example.com/image2.jpg out=75 -mix 25 -mixer luma \
    
http://example.com/image3.jpg out=75 -mix 25 -mixer luma \
    
http://example.com/image4.jpg out=75 -mix 25 -mixer luma \
    
http://example.com/image5.jpg out=75 -mix 25 -mixer luma \
    
-consumer avformat:output.mp4 vcodec=libx264 an=1

    But it gives

    No LADSPA plugins were found!
    

    
Check your LADSPA_PATH environment variable.

    and full output is

    No LADSPA plugins were found!
    

    
Check your LADSPA_PATH environment variable.
    
[mjpeg @ 0x168a320] Changeing bps to 8
    
[mjpeg @ 0x12725a0] Changeing bps to 8
    
[mjpeg @ 0x1691120] Changeing bps to 8
    
[mjpeg @ 0x1bc5ac0] Changeing bps to 8
    
[mjpeg @ 0x1907ae0] Changeing bps to 8
    
[mjpeg @ 0x1d09a20] Changeing bps to 8
    
[mjpeg @ 0x13a2b00] Changeing bps to 8
    
[mjpeg @ 0x1e4e6e0] Changeing bps to 8
    
[mjpeg @ 0x1d0b8c0] Changeing bps to 8
    
[mjpeg @ 0x1d190c0] Changeing bps to 8
    
+-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+
    
|1=-10| |2= -5| |3= -2| |4= -1| |5=  0| |6=  1| |7=  2| |8=  5| |9= 10|
    
+-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+
    
+---------------------------------------------------------------------+
    
|               H = back 1 minute,  L = forward 1 minute              |
    
|                 h = previous frame,  l = next frame                 |
    
|           g = start of clip, j = next clip, k = previous clip       |
    
|                0 = restart, q = quit, space = play                  |
    
+---------------------------------------------------------------------+
    
[libx264 @ 0x7f7f980c7aa0] using SAR=1/1
    
[libx264 @ 0x7f7f980c7aa0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x7f7f980c7aa0] profile High, level 3.1
    
[libx264 @ 0x7f7f980c7aa0] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=6 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=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=1.40 aq=1:1.00
    
[mjpeg @ 0x7f7f88433200] Changeing bps to 8
    
[mjpeg @ 0x7f7f88832980] Changeing bps to 8
    
[mjpeg @ 0x7f7f88052ac0] Changeing bps to 8
    
[mjpeg @ 0x7f7f88c5abe0] Changeing bps to 8
    
[mjpeg @ 0x7f7f88bdd560] Changeing bps to 8
    
[mjpeg @ 0x7f7f88beb2a0] Changeing bps to 8
    
[mjpeg @ 0x7f7f88c838a0] Changeing bps to 8
    
[mjpeg @ 0x7f7f894a1100] Changeing bps to 8
    
[mjpeg @ 0x7f7f88b6a3a0] Changeing bps to 8
    
[mjpeg @ 0x7f7f88b78840] Changeing bps to 8
    
[swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
    
[swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
    
[swscaler @ 0x7f7f898cc980] Warning: data is not aligned! This can lead to a speedloss
    
[swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
    
[swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
    
[swscaler @ 0x7f7f88c5f740] YUV color matrix differs for YUV->YUV, using intermediate RGB to convert
    
[mjpeg @ 0x7f7f89ff25a0] Changeing bps to 8
    
Segmentation fault (core dumped)

    Also, the generated video file is broken

    How can I provide http input ?

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