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  • ffmpeg - splitting, overlaying and selecting frame range in multiple input/outputs with complex video filter producing empty output

    11 octobre 2017, par Josep Carner

    I am trying to use ffmpeg to apply multiple filters -single input, multiple outputs-. In concrete, I am splitting the output in two, then applying an overlaying patch to one of those streams, split again and select a time range. The command I am using is :

      ffmpeg \
       -i ./dataset_test/videos/jz_10_huron_barstow.mkv \
       -an \
       -sn \
       -loglevel error \
       -filter_complex \
           "[0:v]split=2[L_in][F_in];
            [L_in]
               crop=226:307:21:74,scale=200x200,setdar=200:200,split=2\
            [L_in_0][L_in_1];\
            color=#808080:226x307,setpts=PTS-STARTPTS[L_PATCH];\
            [F_in][L_PATCH]
               overlay=21:74:shortest=1,scale=200x200,setdar=200:200,split=2\
            [F_in_0][F_in_1];\
            [F_in_0]select='between(t\,32\,212)',select='not(mod(n\,20))',setpts=(PTS-STARTPTS)/20[F_0];\
            [F_in_1]select='between(t\,213\,393)',select='not(mod(n\,20))',setpts=(PTS-STARTPTS)/20[F_1];\
            [L_in_0]select='between(t\,32\,212)',select='not(mod(n\,20))',setpts=(PTS-STARTPTS)/20[L_0];\
            [L_in_1]select='between(t\,213\,393)',select='not(mod(n\,20))',setpts=(PTS-STARTPTS)/20[L_1]\
            "\
       -map [F_0] -an -sn ./out/jz_10_huron_barstow/F/0_F.mp4\
       -map [F_1] -an -sn ./out/jz_10_huron_barstow/F/1_F.mp4\
       -map [L_0] -an -sn ./out/jz_10_huron_barstow/L/0_L.mp4\
       -map [L_1] -an -sn ./out/jz_10_huron_barstow/L/1_L.mp4\

    For some reason, 0_F.mp4 is empty and 1_F.mp4 is cropped. My intuition is that it has something to do with applying splitting + overlaying + selecting. I think at some point some filter before select is changing the PTS of the frames in some way select is not properly discarding them, but I honestly don’t know how to solve it. Some insights :

    1. L_0 and L_1 are fine (no overlay is used in those two)

    2. If I suppress L outputs everything works fine (no "split" is needed at the beginning)

    Could someone provide some light ? I don’t really know what else to try.
    The logs with loglevel 40 are (some repeated lines ommited) :

    ffmpeg version 2.8.1 Copyright (c) 2000-2015 the FFmpeg developers
     built with Apple LLVM version 9.0.0 (clang-900.0.37)
     configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.1_1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
     libavutil      54. 31.100 / 54. 31.100
     libavcodec     56. 60.100 / 56. 60.100
     libavformat    56. 40.101 / 56. 40.101
     libavdevice    56.  4.100 / 56.  4.100
     libavfilter     5. 40.101 /  5. 40.101
     libavresample   2.  1.  0 /  2.  1.  0
     libswscale      3.  1.101 /  3.  1.101
     libswresample   1.  2.101 /  1.  2.101
     libpostproc    53.  3.100 / 53.  3.100
    Input #0, matroska,webm, from './dataset_test/videos/jz_10_huron_barstow.mkv':
     Metadata:
       ENCODER         : Lavf57.66.104
     Duration: 00:24:04.14, start: 0.000000, bitrate: 2117 kb/s
       Stream #0:0: Video: h264 (Main), 1 reference frame, yuv420p, 1440x900 (1440x912) [SAR 1:1 DAR 8:5], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
       Metadata:
         ENCODER         : Lavc57.83.100 h264_nvenc
         DURATION        : 00:24:04.102000000
       Stream #0:1: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s (default)
       Metadata:
         ENCODER         : Lavc57.83.100 ac3
         DURATION        : 00:24:04.135000000
    [Parsed_scale_2 @ 0x7fdfd2403d20] w:200 h:200 flags:'bilinear' interl:0
    [Parsed_setdar_3 @ 0x7fdfd240ad80] num:den syntax is deprecated, please use num/den or named options instead
    [Parsed_color_5 @ 0x7fdfd24096a0] size:226x307 rate:25/1 duration:-1.000000 sar:1/1
    [Parsed_scale_8 @ 0x7fdfd24092c0] w:200 h:200 flags:'bilinear' interl:0
    [Parsed_setdar_9 @ 0x7fdfd240b360] num:den syntax is deprecated, please use num/den or named options instead
    [Parsed_scale_2 @ 0x7fdfd2509b00] w:200 h:200 flags:'bilinear' interl:0
    [Parsed_setdar_3 @ 0x7fdfd25092c0] num:den syntax is deprecated, please use num/den or named options instead
    [Parsed_color_5 @ 0x7fdfd250a520] size:226x307 rate:25/1 duration:-1.000000 sar:1/1
    [Parsed_scale_8 @ 0x7fdfd250b620] w:200 h:200 flags:'bilinear' interl:0
    [Parsed_setdar_9 @ 0x7fdfd250a960] num:den syntax is deprecated, please use num/den or named options instead
    [graph 0 input from stream 0:0 @ 0x7fdfd2511360] w:1440 h:900 pixfmt:yuv420p tb:1/1000 fr:30/1 sar:1/1 sws_param:flags=2
    [Parsed_crop_1 @ 0x7fdfd2509c80] w:1440 h:900 sar:1/1 -> w:226 h:306 sar:1/1
    [Parsed_scale_2 @ 0x7fdfd2509b00] w:226 h:306 fmt:yuv420p sar:1/1 -> w:200 h:200 fmt:yuv420p sar:113/153 flags:0x2
    [Parsed_setdar_3 @ 0x7fdfd25092c0] w:200 h:200 dar:113/153 sar:113/153 -> dar:1/1 sar:1/1
    [Parsed_select_21 @ 0x7fdfd250a760] TB:0.001000 FRAME_RATE:30.000000 SAMPLE_RATE:nan
    [Parsed_select_18 @ 0x7fdfd250a080] TB:0.001000 FRAME_RATE:30.000000 SAMPLE_RATE:nan
    [Parsed_color_5 @ 0x7fdfd250a520] TB:0.040000 FRAME_RATE:25.000000 SAMPLE_RATE:nan
    [Parsed_overlay_7 @ 0x7fdfd250b020] main w:1440 h:900 fmt:yuv420p overlay w:226 h:306 fmt:yuva420p eof_action:endall
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Selected 1/1000 time base
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Sync level 2
    [Parsed_scale_8 @ 0x7fdfd250b620] w:1440 h:900 fmt:yuv420p sar:1/1 -> w:200 h:200 fmt:yuv420p sar:8/5 flags:0x2
    [Parsed_setdar_9 @ 0x7fdfd250a960] w:200 h:200 dar:8/5 sar:8/5 -> dar:1/1 sar:1/1
    [Parsed_select_15 @ 0x7fdfd250dd00] TB:0.001000 FRAME_RATE:30.000000 SAMPLE_RATE:nan
    [Parsed_select_12 @ 0x7fdfd250ca60] TB:0.001000 FRAME_RATE:30.000000 SAMPLE_RATE:nan
    [libx264 @ 0x7fdfd4005e00] using SAR=1/1
    [libx264 @ 0x7fdfd4005e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    [libx264 @ 0x7fdfd4005e00] profile High, level 1.2
    [libx264 @ 0x7fdfd4005e00] 264 - core 148 r2601 a0cd7d3 - 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
    [libx264 @ 0x7fdfd400f600] using SAR=1/1
    [libx264 @ 0x7fdfd400f600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    [libx264 @ 0x7fdfd400f600] profile High, level 1.2
    [libx264 @ 0x7fdfd400f600] 264 - core 148 r2601 a0cd7d3 - 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
    [libx264 @ 0x7fdfd4018e00] using SAR=1/1
    [libx264 @ 0x7fdfd4018e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    [libx264 @ 0x7fdfd4018e00] profile High, level 1.2
    [libx264 @ 0x7fdfd4018e00] 264 - core 148 r2601 a0cd7d3 - 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
    [libx264 @ 0x7fdfd4022600] using SAR=1/1
    [libx264 @ 0x7fdfd4022600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    [libx264 @ 0x7fdfd4022600] profile High, level 1.2
    [libx264 @ 0x7fdfd4022600] 264 - core 148 r2601 a0cd7d3 - 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
    Output #0, mp4, to './out/jz_10_huron_barstow/F/0_F.mp4':
     Metadata:
       encoder         : Lavf56.40.101
       Stream #0:0: Video: h264 (libx264), -1 reference frame ([33][0][0][0] / 0x0021), yuv420p, 200x200 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
       Metadata:
         encoder         : Lavc56.60.100 libx264
    Output #1, mp4, to './out/jz_10_huron_barstow/F/1_F.mp4':
     Metadata:
       encoder         : Lavf56.40.101
       Stream #1:0: Video: h264 (libx264), -1 reference frame ([33][0][0][0] / 0x0021), yuv420p, 200x200 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
       Metadata:
         encoder         : Lavc56.60.100 libx264
    Output #2, mp4, to './out/jz_10_huron_barstow/L/0_L.mp4':
     Metadata:
       encoder         : Lavf56.40.101
       Stream #2:0: Video: h264 (libx264), -1 reference frame ([33][0][0][0] / 0x0021), yuv420p, 200x200 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
       Metadata:
         encoder         : Lavc56.60.100 libx264
    Output #3, mp4, to './out/jz_10_huron_barstow/L/1_L.mp4':
     Metadata:
       encoder         : Lavf56.40.101
       Stream #3:0: Video: h264 (libx264), -1 reference frame ([33][0][0][0] / 0x0021), yuv420p, 200x200 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
       Metadata:
         encoder         : Lavc56.60.100 libx264
    Stream mapping:
     Stream #0:0 (h264) -> split
     setpts -> Stream #0:0 (libx264)
     setpts -> Stream #1:0 (libx264)
     setpts -> Stream #2:0 (libx264)
     setpts -> Stream #3:0 (libx264)
    Press [q] to stop, [?] for help
    [swscaler @ 0x7fdfd3800000] Warning: data is not aligned! This can lead to a speedloss
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 210 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 262 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 239 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 195 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 211 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 255 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 148 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 174 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 182 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 193 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:00.26 bitrate=   1.4kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 156 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:00.53 bitrate=   0.7kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 154 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:00.76 bitrate=   0.5kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 155 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:01.03 bitrate=   0.4kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 231 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:01.43 bitrate=   0.3kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 260 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:01.86 bitrate=   0.2kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 256 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:02.30 bitrate=   0.2kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 209 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:02.63 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 253 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:03.06 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 160 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:03.33 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 189 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:03.63 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 201 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:03.96 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 251 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:04.40 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 246 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:04.80 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 257 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:05.23 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 258 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:05.66 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 251 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:06.10 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 274 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:06.56 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 282 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:07.03 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
       Last message repeated 185 times
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    frame=    0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    […]  
    frame=    0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size=       0kB time=00:00:07.26 bitrate=   0.1kbits/s    
    [Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Sync level 1
    No more output streams to write to, finishing.
    frame=    0 fps=0.0 q=0.0 Lq=-1.0 q=-1.0 q=-1.0 size=       0kB time=00:00:08.93 bitrate=   0.2kbits/s    
    video:620kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    Input file #0 (./dataset_test/videos/jz_10_huron_barstow.mkv):
     Input stream #0:0 (video): 43323 packets read (347030822 bytes); 43323 frames decoded;
     Input stream #0:1 (audio): 4 packets read (3072 bytes);
     Total: 43327 packets (347033894 bytes) demuxed
    Output file #0 (./out/jz_10_huron_barstow/F/0_F.mp4):
     Output stream #0:0 (video): 0 frames encoded; 0 packets muxed (0 bytes);
     Total: 0 packets (0 bytes) muxed
    Output file #1 (./out/jz_10_huron_barstow/F/1_F.mp4):
     Output stream #1:0 (video): 270 frames encoded; 270 packets muxed (309743 bytes);
     Total: 270 packets (309743 bytes) muxed
    Output file #2 (./out/jz_10_huron_barstow/L/0_L.mp4):
     Output stream #2:0 (video): 270 frames encoded; 270 packets muxed (169687 bytes);
     Total: 270 packets (169687 bytes) muxed
    Output file #3 (./out/jz_10_huron_barstow/L/1_L.mp4):
     Output stream #3:0 (video): 270 frames encoded; 270 packets muxed (155502 bytes);
     Total: 270 packets (155502 bytes) muxed
    [libx264 @ 0x7fdfd400f600] frame I:2     Avg QP:25.08  size:  3204
    [libx264 @ 0x7fdfd400f600] frame P:140   Avg QP:26.63  size:  1426
    [libx264 @ 0x7fdfd400f600] frame B:128   Avg QP:28.64  size:   805
    [libx264 @ 0x7fdfd400f600] consecutive B-frames:  5.2% 94.8%  0.0%  0.0%
    [libx264 @ 0x7fdfd400f600] mb I  I16..4:  8.6% 62.7% 28.7%
    [libx264 @ 0x7fdfd400f600] mb P  I16..4:  2.5% 12.5%  3.4%  P16..4: 39.2% 21.4%  9.3%  0.0%  0.0%    skip:11.6%
    [libx264 @ 0x7fdfd400f600] mb B  I16..4:  0.5%  4.0%  1.0%  B16..8: 36.5% 16.7%  4.0%  direct: 5.5%  skip:31.8%  L0:43.4% L1:46.9% BI: 9.7%
    [libx264 @ 0x7fdfd400f600] 8x8 transform intra:68.6% inter:67.7%
    [libx264 @ 0x7fdfd400f600] coded y,uvDC,uvAC intra: 63.1% 48.6% 17.9% inter: 34.5% 21.1% 3.6%
    [libx264 @ 0x7fdfd400f600] i16 v,h,dc,p: 24% 23% 12% 41%
    [libx264 @ 0x7fdfd400f600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 19% 26%  7%  5%  5%  7%  6%  8%
    [libx264 @ 0x7fdfd400f600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 29% 18%  6%  6%  5%  5%  4%  5%
    [libx264 @ 0x7fdfd400f600] i8c dc,h,v,p: 63% 21% 14%  3%
    [libx264 @ 0x7fdfd400f600] Weighted P-Frames: Y:14.3% UV:1.4%
    [libx264 @ 0x7fdfd400f600] ref P L0: 49.2% 20.4% 17.3% 11.2%  1.9%
    [libx264 @ 0x7fdfd400f600] ref B L0: 75.4% 24.6%
    [libx264 @ 0x7fdfd400f600] kb/s:274.71
    [libx264 @ 0x7fdfd4018e00] frame I:2     Avg QP:23.87  size:  2294
    [libx264 @ 0x7fdfd4018e00] frame P:133   Avg QP:25.45  size:   864
    [libx264 @ 0x7fdfd4018e00] frame B:135   Avg QP:28.99  size:   367
    [libx264 @ 0x7fdfd4018e00] consecutive B-frames: 17.4% 38.5% 27.8% 16.3%
    [libx264 @ 0x7fdfd4018e00] mb I  I16..4: 14.5% 54.1% 31.4%
    [libx264 @ 0x7fdfd4018e00] mb P  I16..4:  6.4%  9.6%  2.1%  P16..4: 33.3% 16.7%  5.9%  0.0%  0.0%    skip:26.0%
    [libx264 @ 0x7fdfd4018e00] mb B  I16..4:  1.6%  2.0%  0.3%  B16..8: 29.6%  9.3%  1.4%  direct: 2.2%  skip:53.6%  L0:41.9% L1:51.4% BI: 6.7%
    [libx264 @ 0x7fdfd4018e00] 8x8 transform intra:52.8% inter:73.8%
    [libx264 @ 0x7fdfd4018e00] coded y,uvDC,uvAC intra: 40.7% 41.7% 8.9% inter: 20.7% 16.6% 0.2%
    [libx264 @ 0x7fdfd4018e00] i16 v,h,dc,p: 22% 50%  8% 21%
    [libx264 @ 0x7fdfd4018e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 30% 23%  6%  2%  2%  5%  5%  9%
    [libx264 @ 0x7fdfd4018e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 29% 14%  5%  3%  4%  5%  6%  5%
    [libx264 @ 0x7fdfd4018e00] i8c dc,h,v,p: 62% 23% 12%  3%
    [libx264 @ 0x7fdfd4018e00] Weighted P-Frames: Y:1.5% UV:0.8%
    [libx264 @ 0x7fdfd4018e00] ref P L0: 56.1% 15.8% 17.7% 10.2%  0.1%
    [libx264 @ 0x7fdfd4018e00] ref B L0: 75.4% 20.8%  3.9%
    [libx264 @ 0x7fdfd4018e00] ref B L1: 92.6%  7.4%
    [libx264 @ 0x7fdfd4018e00] kb/s:150.22
    [libx264 @ 0x7fdfd4022600] frame I:2     Avg QP:23.86  size:  2208
    [libx264 @ 0x7fdfd4022600] frame P:139   Avg QP:24.90  size:   784
    [libx264 @ 0x7fdfd4022600] frame B:129   Avg QP:28.25  size:   322
    [libx264 @ 0x7fdfd4022600] consecutive B-frames: 17.8% 50.4% 15.6% 16.3%
    [libx264 @ 0x7fdfd4022600] mb I  I16..4: 15.7% 53.3% 31.1%
    [libx264 @ 0x7fdfd4022600] mb P  I16..4:  8.3%  9.9%  1.5%  P16..4: 33.8% 14.8%  5.0%  0.0%  0.0%    skip:26.7%
    [libx264 @ 0x7fdfd4022600] mb B  I16..4:  1.6%  1.8%  0.1%  B16..8: 28.8%  8.2%  1.1%  direct: 2.1%  skip:56.4%  L0:45.5% L1:47.6% BI: 6.9%
    [libx264 @ 0x7fdfd4022600] 8x8 transform intra:50.6% inter:75.8%
    [libx264 @ 0x7fdfd4022600] coded y,uvDC,uvAC intra: 34.0% 44.3% 10.0% inter: 18.8% 17.9% 0.4%
    [libx264 @ 0x7fdfd4022600] i16 v,h,dc,p: 18% 54%  8% 20%
    [libx264 @ 0x7fdfd4022600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 28% 26%  6%  2%  2%  4%  5%  8%
    [libx264 @ 0x7fdfd4022600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 31% 14%  4%  2%  2%  3%  7%  5%
    [libx264 @ 0x7fdfd4022600] i8c dc,h,v,p: 60% 25% 13%  2%
    [libx264 @ 0x7fdfd4022600] Weighted P-Frames: Y:2.2% UV:0.7%
    [libx264 @ 0x7fdfd4022600] ref P L0: 57.9% 16.8% 16.1%  8.9%  0.2%
    [libx264 @ 0x7fdfd4022600] ref B L0: 76.5% 21.0%  2.5%
    [libx264 @ 0x7fdfd4022600] ref B L1: 95.0%  5.0%
    [libx264 @ 0x7fdfd4022600] kb/s:137.61
  • The C++11 Thread Timer is not working

    26 août 2017, par Gathros

    I’m trying to make a video player using SDL2 and FFmpeg API. The video is being decoded and I can display an image on screen. I can also play audio but I not doing that (I know it works, I’ve tried it).

    My problem is I can’t update the image when it should be. I’m able to get the timestamps and work out the delay then send it to a thread, where it should call an window update when the time has elapsed. But all that happens is the images flash on the screen with no delay. I have even set the delay to 1 second and the images still flash, after there being 1 second of a blank window.

    Here is my code :

    extern "C"{
       //FFmpeg libraries
       #include <libavcodec></libavcodec>avcodec.h>
       #include <libavformat></libavformat>avformat.h>
       #include <libswscale></libswscale>swscale.h>

       //SDL2 libraries
       #include <sdl2></sdl2>SDL.h>
    }
    // compatibility with newer API
    #if LIBAVCODEC_VERSION_INT &lt; AV_VERSION_INT(55,28,1)
    #define av_frame_alloc avcodec_alloc_frame
    #define av_frame_free avcodec_free_frame
    #endif

    //C++ libraries
    #include <cstdio>
    #include <chrono>
    #include <thread>
    #include <atomic>
    #include <mutex>
    #include

    typedef struct PacketQueue {
       AVPacketList                *first_pkt, *last_pkt;
       std::mutex                  mutex;
       std::condition_variable     convar;
    } PacketQueue;

    std::atomic<bool>           quitting, decoded;
    std::atomic        delay;
    Uint32                      Update_Window;

    int packet_queue_put(PacketQueue *q, AVPacket *pkt){
       AVPacketList *pkt1;
       if(av_dup_packet(pkt) &lt; 0){
           return -1;
       }
       pkt1 = (AVPacketList*) av_malloc(sizeof(AVPacketList));
       if(!pkt1){
           return -1;
       }
       pkt1->pkt = *pkt;
       pkt1->next = NULL;

       std::lock_guard lock(q->mutex);

       if (!q->last_pkt){
           q->first_pkt = pkt1;
       }else{
           q->last_pkt->next = pkt1;
       }
       q->last_pkt = pkt1;
       q->convar.notify_all();
       return 0;
    }

    static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block){
       AVPacketList *pkt1;
       int ret;

       std::unique_lock lk(q->mutex);
       while(1){
           if(quitting){
               ret = -1;
               break;
           }

           pkt1 = q->first_pkt;
           if(pkt1){
               q->first_pkt = pkt1->next;
               if(!q->first_pkt){
                   q->last_pkt = NULL;
               }
               *pkt = pkt1->pkt;
               av_free(pkt1);
               ret = 1;
               break;
           }else if(decoded){
               ret = 0;
               quitting = true;
               break;
           }else if(block){
               q->convar.wait_for(lk, std::chrono::microseconds(50));
           }else {
               ret = 0;
               break;
           }
       }
       return ret;
    }

    void UpdateEventQueue(){
       SDL_Event event;
       SDL_zero(event);
       event.type = Update_Window;
       SDL_PushEvent(&amp;event);
    }

    void VideoTimerThreadFunc(){
       UpdateEventQueue();

       while(!quitting){
           if(delay == 0){
               std::this_thread::sleep_for(std::chrono::milliseconds(1));
           }else {
               std::this_thread::sleep_for(std::chrono::microseconds(delay));
               UpdateEventQueue();
           }
       }
    }

    int main(int argc, char *argv[]){
       AVFormatContext*                FormatCtx = nullptr;
       AVCodecContext*                 CodecCtxOrig = nullptr;
       AVCodecContext*                 CodecCtx = nullptr;
       AVCodec*                        Codec = nullptr;
       int                             videoStream;
       AVFrame*                        Frame = nullptr;
       AVPacket                        packet;
       struct SwsContext*              SwsCtx = nullptr;

       PacketQueue                     videoq;
       int                             frameFinished;
       int64_t                         last_pts = 0;
       const AVRational                ms = {1, 1000};

       SDL_Event                       event;
       SDL_Window*                     screen;
       SDL_Renderer*                   renderer;
       SDL_Texture*                    texture;
       std::shared_ptr<uint8>          yPlane, uPlane, vPlane;
       int                             uvPitch;

       if (argc != 2) {
           fprintf(stderr, "Usage: %s <file>\n", argv[0]);
           return -1;
       }

       // Register all formats and codecs
       av_register_all();

       // Initialise SDL2
       if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
           fprintf(stderr, "Couldn't initialise SDL - %s\n", SDL_GetError());
           return -1;
       }

       // Setting things up
       quitting = false;
       decoded = false;
       delay = 0;
       Update_Window = SDL_RegisterEvents(1);
       memset(&amp;videoq, 0, sizeof(PacketQueue));

       // Open video file
       if(avformat_open_input(&amp;FormatCtx, argv[1], NULL, NULL) != 0){
           fprintf(stderr, "Couldn't open file\n");        
           return -1; // Couldn't open file
       }

       // Retrieve stream information
       if(avformat_find_stream_info(FormatCtx, NULL) &lt; 0){
           fprintf(stderr, "Couldn't find stream information\n");

           // Close the video file
           avformat_close_input(&amp;FormatCtx);

           return -1; // Couldn't find stream information
       }

       // Find the video stream
       videoStream = av_find_best_stream(FormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
       if(videoStream &lt; 0){
           fprintf(stderr, "Couldn't find video stream\n");

           // Close the video file
           avformat_close_input(&amp;FormatCtx);

           return -1; // Didn't find a video stream
       }

       // Get a pointer to the codec context for the video stream
       CodecCtxOrig = FormatCtx->streams[videoStream]->codec;

       // Find the decoder for the video stream
       Codec = avcodec_find_decoder(CodecCtxOrig->codec_id);
       if(Codec == NULL){
           fprintf(stderr, "Unsupported codec\n");

           // Close the codec
           avcodec_close(CodecCtxOrig);

           // Close the video file
           avformat_close_input(&amp;FormatCtx);

           return -1; // Codec not found
       }

       // Copy context
       CodecCtx = avcodec_alloc_context3(Codec);
       if(avcodec_copy_context(CodecCtx, CodecCtxOrig) != 0){
           fprintf(stderr, "Couldn't copy codec context");

           // Close the codec
           avcodec_close(CodecCtxOrig);

           // Close the video file
           avformat_close_input(&amp;FormatCtx);

           return -1; // Error copying codec context
       }

       // Open codec
       if(avcodec_open2(CodecCtx, Codec, NULL) &lt; 0){
           fprintf(stderr, "Couldn't open codec\n");

           // Close the codec
           avcodec_close(CodecCtx);
           avcodec_close(CodecCtxOrig);

           // Close the video file
           avformat_close_input(&amp;FormatCtx);
           return -1; // Could not open codec
       }

       // Allocate video frame
       Frame = av_frame_alloc();

       // Make a screen to put our video
       screen = SDL_CreateWindow("Video Player", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, CodecCtx->width, CodecCtx->height, 0);
       if(!screen){
           fprintf(stderr, "SDL: could not create window - exiting\n");
           quitting = true;

           // Clean up SDL2
           SDL_Quit();

           // Free the YUV frame
           av_frame_free(&amp;Frame);

           // Close the codec
           avcodec_close(CodecCtx);
           avcodec_close(CodecCtxOrig);

           // Close the video file
           avformat_close_input(&amp;FormatCtx);

           return -1;
       }

       renderer = SDL_CreateRenderer(screen, -1, 0);
       if(!renderer){
           fprintf(stderr, "SDL: could not create renderer - exiting\n");
           quitting = true;

           // Clean up SDL2
           SDL_DestroyWindow(screen);
           SDL_Quit();

           // Free the YUV frame
           av_frame_free(&amp;Frame);

           // Close the codec
           avcodec_close(CodecCtx);
           avcodec_close(CodecCtxOrig);

           // Close the video file
           avformat_close_input(&amp;FormatCtx);
           return -1;
       }

       // Allocate a place to put our YUV image on that screen
       texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING, CodecCtx->width, CodecCtx->height);
       if(!texture){
           fprintf(stderr, "SDL: could not create texture - exiting\n");
           quitting = true;

           // Clean up SDL2
           SDL_DestroyRenderer(renderer);
           SDL_DestroyWindow(screen);
           SDL_Quit();

           // Free the YUV frame
           av_frame_free(&amp;Frame);

           // Close the codec
           avcodec_close(CodecCtx);
           avcodec_close(CodecCtxOrig);

           // Close the video file
           avformat_close_input(&amp;FormatCtx);
           return -1;
       }

       // Initialise SWS context for software scaling
       SwsCtx = sws_getContext(CodecCtx->width, CodecCtx->height, CodecCtx->pix_fmt,
                   CodecCtx->width, CodecCtx->height, PIX_FMT_YUV420P, SWS_BILINEAR, NULL, NULL, NULL);
       if(!SwsCtx){
           fprintf(stderr, "Couldn't create sws context\n");
           quitting = true;

           // Clean up SDL2
           SDL_DestroyTexture(texture);
           SDL_DestroyRenderer(renderer);
           SDL_DestroyWindow(screen);
           SDL_Quit();

           // Free the YUV frame
           av_frame_free(&amp;Frame);

           // Close the codec
           avcodec_close(CodecCtx);
           avcodec_close(CodecCtxOrig);

           // Close the video file
           avformat_close_input(&amp;FormatCtx);
           return -1;
       }

       // set up YV12 pixel array (12 bits per pixel)
       yPlane = std::shared_ptr<uint8>((Uint8 *)::operator new (CodecCtx->width * CodecCtx->height, std::nothrow));
       uPlane = std::shared_ptr<uint8>((Uint8 *)::operator new (CodecCtx->width * CodecCtx->height / 4, std::nothrow));
       vPlane = std::shared_ptr<uint8>((Uint8 *)::operator new (CodecCtx->width * CodecCtx->height / 4, std::nothrow));
       uvPitch = CodecCtx->width / 2;

       if (!yPlane || !uPlane || !vPlane) {
           fprintf(stderr, "Could not allocate pixel buffers - exiting\n");
           quitting = true;

           // Clean up SDL2
           SDL_DestroyTexture(texture);
           SDL_DestroyRenderer(renderer);
           SDL_DestroyWindow(screen);
           SDL_Quit();

           // Free the YUV frame
           av_frame_free(&amp;Frame);

           // Close the codec
           avcodec_close(CodecCtx);
           avcodec_close(CodecCtxOrig);

           // Close the video file
           avformat_close_input(&amp;FormatCtx);
           return -1;
       }

       std::thread VideoTimer (VideoTimerThreadFunc);

       while (!quitting) {
           // Check for more packets
           if(av_read_frame(FormatCtx, &amp;packet) >= 0){
               // Check what stream it belongs to
               if (packet.stream_index == videoStream) {
                   packet_queue_put(&amp;videoq, &amp;packet);
               }else{
                   // Free the packet that was allocated by av_read_frame
                   av_free_packet(&amp;packet);
               }
           }else {
               decoded = true;
           }

           SDL_PollEvent(&amp;event);

           if(event.type == Update_Window){
               // Getting packet
               if(packet_queue_get(&amp;videoq, &amp;packet, 0)){
                   // Decode video frame
                   avcodec_decode_video2(CodecCtx, Frame, &amp;frameFinished, &amp;packet);

                   // Did we get a video frame?
                   if (frameFinished) {
                       AVPicture pict;
                       pict.data[0] = yPlane.get();
                       pict.data[1] = uPlane.get();
                       pict.data[2] = vPlane.get();
                       pict.linesize[0] = CodecCtx->width;
                       pict.linesize[1] = uvPitch;
                       pict.linesize[2] = uvPitch;

                       // Convert the image into YUV format that SDL uses
                       sws_scale(SwsCtx, (uint8_t const * const *) Frame->data, Frame->linesize, 0, CodecCtx->height, pict.data, pict.linesize);

                       SDL_UpdateYUVTexture(texture, NULL, yPlane.get(), CodecCtx->width, uPlane.get(), uvPitch, vPlane.get(), uvPitch);

                       SDL_RenderClear(renderer);
                       SDL_RenderCopy(renderer, texture, NULL, NULL);
                       SDL_RenderPresent(renderer);

                       // Calculating delay
                       delay = av_rescale_q(packet.dts, CodecCtx->time_base, ms) - last_pts;
                       last_pts = av_rescale_q(packet.dts, CodecCtx->time_base, ms);
                   }else{
                       //UpdateEventQueue();
                       delay = 1;
                   }

                   // Free the packet that was allocated by av_read_frame
                   av_free_packet(&amp;packet);

               }else{
                   //UpdateEventQueue();
               }
           }

           switch (event.type) {
               case SDL_QUIT:
                   quitting = true;
                   break;

               default:
                   break;
           }
       }

       VideoTimer.join();

       //SDL2 clean up
       SDL_DestroyTexture(texture);
       SDL_DestroyRenderer(renderer);
       SDL_DestroyWindow(screen);
       SDL_Quit();

       // Free the YUV frame
       av_frame_free(&amp;Frame);

       // Free Sws
       sws_freeContext(SwsCtx);

       // Close the codec
       avcodec_close(CodecCtx);
       avcodec_close(CodecCtxOrig);

       // Close the video file
       avformat_close_input(&amp;FormatCtx);

       return 0;
    }
    </uint8></uint8></uint8></file></uint8></bool></mutex></atomic></thread></chrono></cstdio>
  • PHP and FFmpeg : works on terminal but ffmpeg error when in shell_exec

    25 janvier 2014, par user2128983

    I'm in front of a problem I can't solve !

    I try to convert videos using the ffmpeg tool. When I paste the command on the server terminal (ssh root), it works fine. But, when I try in my PHP script using shell_exec, it returns the error "Error while opening encoder ...".

    Here is the command I use :

    ffmpeg -y -i VIDEOIN.mov -preset medium -strict -2 -c:v libx264 -b:v 1000k -pass 1 -f mp4 VIDEOOUT.mp4 null 1>logfile.txt 2>&amp;1 &amp;

    And my PHP script :

    $dir = &#39;videos/&#39;.$uuid;
    $out = $dir.&#39;video.mp4&#39;;
    $log = $dir.&#39;transcoding_log.txt&#39;;
    $preset = &#39;medium&#39;;
    $bitrate = 1000;

    $cmd = "ffmpeg -y -i ".$in." -preset ".$preset." -strict -2 -c:v libx264 -b:v ".$bitrate."k -pass 1 -f mp4 ".$out." null 1>".$log." 2>&amp;1 &amp;";
    @file_put_contents($dir.&#39;cmd.log&#39;, $cmd); // to debug
    shell_exec($cmd);

    Here is the log file created in the PHP script :

    ffmpeg version 1.0.8 Copyright (c) 2000-2013 the FFmpeg developers
    built on Sep 12 2013 11:57:09 with gcc 4.7 (Debian 4.7.2-5)
    configuration: --prefix=/usr --extra-cflags=&#39;-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security &#39; --extra-ldflags=&#39;-Wl,-z,relro&#39; --cc=&#39;ccache cc&#39; --enable-shared --enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter --enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb --enable-libvo-amrwbenc --enable-libaacplus --libdir=/usr/lib/x86_64-linux-gnu --disable-vda --enable-libbluray --enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl --enable-libass --enable-libopus --enable-fontconfig --enable-libfdk-aac --enable-libdc1394 --disable-altivec --dis  libavutil      51. 73.101 / 51. 73.101
     libavcodec     54. 59.100 / 54. 59.100
     libavformat    54. 29.104 / 54. 29.104
     libavdevice    54.  2.101 / 54.  2.101
     libavfilter     3. 17.100 /  3. 17.100
     libswscale      2.  1.101 /  2.  1.101
     libswresample   0. 15.100 /  0. 15.100
     libpostproc    52.  0.100 / 52.  0.100
    Input #0, matroska,webm, from &#39;videos/18352678af96ecb5/origin.webm&#39;:
     Metadata:
       creation_time   : 2010-05-20 08:21:12
     Duration: 00:00:32.48, start: 0.000000, bitrate: 533 kb/s
       Stream #0:0(eng): Video: vp8, yuv420p, 640x360, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
       Stream #0:1(eng): Audio: vorbis, 44100 Hz, mono, s16 (default)
    [libx264 @ 0x19c05a0] using SAR=1/1
    [libx264 @ 0x19c05a0] using cpu capabilities: MMX2 SSE2Fast SSEMisalign LZCNT
    [libx264 @ 0x19c05a0] ratecontrol_init: can&#39;t open stats file
    Output #0, mp4, to &#39;videos/18352678af96ecb5/video.mp4&#39;:
       Stream #0:0(eng): Video: h264, yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, pass 1,     90k tbn, 25 tbc (default)
       Stream #0:1(eng): Audio: none, 44100 Hz, mono, s16, 128 kb/s (default)
    Stream mapping:
     Stream #0:0 -> #0:0 (vp8 -> libx264)
     Stream #0:1 -> #0:1 (vorbis -> libfaac)
    Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as     bit_rate, rate, width or height

    EDIT 1 :

    I compiled ffmpeg with the latest revision but the problem still occurs.