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• Audio clipping after amerge in FFmpeg

  23 avril 2021, par gooey_duck

  Hoping someone out there can help me with this audio issue I'm having using FFmpeg. I've written a bash script using FFmpeg that processes as source a broadcast quality ProRes (HQ) file with four mono tracks of audio. Source audio is LPCM 24-bit, 48kHz signed little endian, and I am exporting the same. Track 1 is full mix left, track 2 is full mix right, track 3 is music/FX left and track 4 is music/FX right. The script takes the source video and trims the video asset using in and out points from a sidecar XML. It also adds a custom slate at the head that uses a separate slate-only MOV file and is joined together via concat. Custom text is added to the slate via the drawtext filter and, finally, audio tracks 3 and 4 are removed and tracks 1 and 2 are merged together into a single stereo interleaved track using amerge.

  


  All of this, seemingly, works like a charm. The problem I'm noticing occurs when I run the resulting export through our in-house QC software. This software detects audio signal clipping at multiple points throughout the file created by FFmpeg. When I create this exact same file via Adobe Premiere or another transcode system, our QC does not detect any clipping. Our QC tools also do not detect any clipping in the source file. This leads me to believe that the clipping is being introduced either by FFmpeg or by my implementation of it. I've tried multiple additional filters within FFmpeg, including pan, amix, volume, etc., but nothing seems to help.

  


  Anyone have any ideas ? Pasting the relevant section of my script for reference :

  


  ffmpeg \
-ss "$hour":"$min":"$sec""$mil_fin" \
-t "$hour_minus":"$min_b":"$sec_b""$mil_fin_b" \
-i "$vid" \
-i "$elements_path"Slate_HD.mov \
-filter_complex \
"[0:a:0] [0:a:1] amerge=inputs=2 [stereo]; \
[1:0] [1:1] [0:0] [stereo] concat=n=2:v=1:a=1 [v] [a]; \
[v]drawtext=enable='between(t,0,28)':fontfile="$fonts"Arial.ttf:fontsize=50:fontcolor=white\
:x=170:y=170:text='$title', \
drawtext=enable='between(t,0,28)':fontfile="$fonts"Arial.ttf:fontsize=50:fontcolor=white\
:x=170:y=170+50:text='Series $series_number Episode $episode_number', \
drawtext=enable='between(t,0,28)':fontfile="$fonts"Arial.ttf:fontsize=50:fontcolor=white\
:x=170:y=170+150:text='$transcode_date', \
yadif=0:-1:0 [o]" \
-map '[o]' -map '[a]' \
-timecode 09:59:30:00 \
-c:v prores_ks -profile:v 3 \
-c:a pcm_s24le \
-threads 3 \
"$output_name".mov


  


  Per suggestion, simplified audio only command line was run as follows :

  


  ffmpeg -i test.mov -i Slate_HD.mov -filter_complex "[0:a:0] [0:a:1] amerge=inputs=2 [stereo];[1:a][stereo]concat=n=2:a=1:v=0" -c:a pcm_s24le test_output.mov


  


  ...and the log from that command line :

  


  ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.29)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2_3 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Guessed Channel Layout for Input Stream #0.1 : mono
Guessed Channel Layout for Input Stream #0.2 : mono
Guessed Channel Layout for Input Stream #0.3 : mono
Guessed Channel Layout for Input Stream #0.4 : mono
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/input/test.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2021-04-22T18:58:58.000000Z
  Duration: 00:02:00.04, start: 0.000000, bitrate: 170739 kb/s
    Stream #0:0(eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv, bt709/unknown/unknown, top coded first (swapped)), 1920x1080, 166061 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Apple ProRes 422 HQ
      timecode        : 00:00:00:00
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:5(eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00:00
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/input/Slate_HD.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2021-03-22T17:23:16.000000Z
  Duration: 00:00:30.00, start: 0.000000, bitrate: 77599 kb/s
    Stream #1:0(eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv, bt709, progressive), 1920x1080, 75783 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2021-03-22T17:23:16.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Apple ProRes 422 HQ
      timecode        : 00:00:00:00
    Stream #1:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2021-03-22T17:23:16.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #1:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2021-03-22T17:23:16.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00:00
Stream mapping:
  Stream #0:1 (pcm_s24le) -> amerge:in0 (graph 0)
  Stream #0:2 (pcm_s24le) -> amerge:in1 (graph 0)
  Stream #1:1 (pcm_s16le) -> concat:in0:a0 (graph 0)
  concat (graph 0) -> Stream #0:0 (pcm_s24le)
  Stream #0:0 -> #0:1 (prores (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x7feadf81a600] using SAR=1/1
[libx264 @ 0x7feadf81a600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7feadf81a600] profile High 4:2:2, level 4.0, 4:2:2, 10-bit
[libx264 @ 0x7feadf81a600] 264 - core 161 r3048 b86ae3c - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - 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=81 qpstep=4 ip_ratio=1.40 aq=1:1.00
[Parsed_amerge_0 @ 0x7feade41dfc0] No channel layout for input 1
[Parsed_amerge_0 @ 0x7feade41dfc0] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
Output #0, mov, to '/output/test_output.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    encoder         : Lavf58.45.100
    Stream #0:0: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32, 2304 kb/s (default)
    Metadata:
      encoder         : Lavc58.91.100 pcm_s24le
    Stream #0:1(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv422p10le(top coded first (swapped)), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 0.04 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Video Media Handler
      timecode        : 00:00:00:00
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=   47 fps=0.0 q=0.0 size=       0kB time=00:00:00.02 bitrate=  15.0kbits/sframe=   88 fps= 80 q=40.0 size=     256kB time=00:00:01.17 bitrate=1791.7kbits/frame=  133 fps= 82 q=40.0 size=     768kB time=00:00:02.98 bitrate=2110.4kbits/frame=  164 fps= 76 q=40.0 size=    1280kB time=00:00:04.21 bitrate=2488.8kbits/frame=  185 fps= 70 q=40.0 size=    1792kB time=00:00:05.06 bitrate=2899.0kbits/frame=  195 fps= 61 q=40.0 size=    2048kB time=00:00:05.44 bitrate=3079.6kbits/frame=  206 fps= 55 q=40.0 size=    2560kB time=00:00:05.89 bitrate=3557.0kbits/frame=  218 fps= 51 q=40.0 size=    3072kB time=00:00:06.38 bitrate=3942.1kbits/frame=  230 fps= 47 q=40.0 size=    3584kB time=00:00:06.85 bitrate=4284.1kbits/frame=  242 fps= 44 q=40.0 size=    4096kB time=00:00:07.34 bitrate=4570.7kbits/frame=  251 fps= 42 q=37.0 size=    4352kB time=00:00:07.70 bitrate=4627.7kbits/frame=  265 fps= 41 q=40.0 size=    5376kB time=00:00:08.25 bitrate=5334.4kbits/frame=  272 fps= 39 q=40.0 size=    5632kB time=00:00:08.53 bitrate=5406.8kbits/frame=  283 fps= 37 q=40.0 size=    5888kB time=00:00:08.98 bitrate=5370.6kbits/frame=  296 fps= 37 q=40.0 size=    6400kB .04 bitrate=5549.0kbits/frame= 3001 fps= 21 q=-1.0 Lsize=  106530kB time=00:02:30.04 bitrate=5816.4kbits/s speed=1.07x    
video:64287kB audio:42199kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.041280%
[libx264 @ 0x7feadf81a600] frame I:33    Avg QP:33.56  size:113497
[libx264 @ 0x7feadf81a600] frame P:984   Avg QP:36.20  size: 35478
[libx264 @ 0x7feadf81a600] frame B:1984  Avg QP:37.44  size: 13696
[libx264 @ 0x7feadf81a600] consecutive B-frames: 11.5%  0.9%  0.9% 86.8%
[libx264 @ 0x7feadf81a600] mb I  I16..4:  3.4% 86.8%  9.7%
[libx264 @ 0x7feadf81a600] mb P  I16..4:  1.6% 13.7%  0.7%  P16..4: 44.3%  8.5%  7.0%  0.0%  0.0%    skip:24.2%
[libx264 @ 0x7feadf81a600] mb B  I16..4:  0.1%  1.1%  0.0%  B16..8: 47.6%  2.4%  0.3%  direct: 1.3%  skip:47.3%  L0:47.0% L1:51.3% BI: 1.7%
[libx264 @ 0x7feadf81a600] 8x8 transform intra:85.9% inter:88.3%
[libx264 @ 0x7feadf81a600] coded y,uvDC,uvAC intra: 67.9% 73.8% 13.9% inter: 20.8% 21.6% 0.6%
[libx264 @ 0x7feadf81a600] i16 v,h,dc,p: 48% 15%  4% 33%
[libx264 @ 0x7feadf81a600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 11% 27%  6%  7%  7%  7%  8%  7%
[libx264 @ 0x7feadf81a600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 15% 14%  7%  9%  9%  8%  6%  5%
[libx264 @ 0x7feadf81a600] i8c dc,h,v,p: 57% 12% 24%  7%
[libx264 @ 0x7feadf81a600] Weighted P-Frames: Y:0.1% UV:0.1%
[libx264 @ 0x7feadf81a600] ref P L0: 69.1% 21.7%  9.2%  0.0%
[libx264 @ 0x7feadf81a600] ref B L0: 87.2% 10.4%  2.5%
[libx264 @ 0x7feadf81a600] ref B L1: 94.9%  5.1%
[libx264 @ 0x7feadf81a600] kb/s:4387.16
WU:~ user$ 
ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.29)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2_3 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Guessed Channel Layout for Input Stream #0.1 : mono
Guessed Channel Layout for Input Stream #0.2 : mono
Guessed Channel Layout for Input Stream #0.3 : mono
Guessed Channel Layout for Input Stream #0.4 : mono
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/input/test.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2021-04-22T18:58:58.000000Z
  Duration: 00:02:00.04, start: 0.000000, bitrate: 170739 kb/s
    Stream #0:0(eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv, bt709/unknown/unknown, top coded first (swapped)), 1920x1080, 166061 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Apple ProRes 422 HQ
      timecode        : 00:00:00:00
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #0:5(eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00:00
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/input/Slate_HD.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2021-03-22T17:23:16.000000Z
  Duration: 00:00:30.00, start: 0.000000, bitrate: 77599 kb/s
    Stream #1:0(eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv, bt709, progressive), 1920x1080, 75783 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2021-03-22T17:23:16.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Apple ProRes 422 HQ
      timecode        : 00:00:00:00
    Stream #1:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2021-03-22T17:23:16.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00:00
    Stream #1:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2021-03-22T17:23:16.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00:00
Stream mapping:
  Stream #0:1 (pcm_s24le) -> amerge:in0 (graph 0)
  Stream #0:2 (pcm_s24le) -> amerge:in1 (graph 0)
  Stream #1:1 (pcm_s16le) -> concat:in0:a0 (graph 0)
  concat (graph 0) -> Stream #0:0 (pcm_s24le)
  Stream #0:0 -> #0:1 (prores (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x7feadf81a600] using SAR=1/1
[libx264 @ 0x7feadf81a600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7feadf81a600] profile High 4:2:2, level 4.0, 4:2:2, 10-bit
[libx264 @ 0x7feadf81a600] 264 - core 161 r3048 b86ae3c - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - 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=81 qpstep=4 ip_ratio=1.40 aq=1:1.00
[Parsed_amerge_0 @ 0x7feade41dfc0] No channel layout for input 1
[Parsed_amerge_0 @ 0x7feade41dfc0] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
Output #0, mov, to '/output/test_output.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    encoder         : Lavf58.45.100
    Stream #0:0: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32, 2304 kb/s (default)
    Metadata:
      encoder         : Lavc58.91.100 pcm_s24le
    Stream #0:1(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv422p10le(top coded first (swapped)), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 0.04 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2021-04-22T18:58:58.000000Z
      handler_name    : Apple Video Media Handler
      timecode        : 00:00:00:00
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=   47 fps=0.0 q=0.0 size=       0kB time=00:00:00.02 bitrate=  15.0kbits/sframe=   88 fps= 80 q=40.0 size=     256kB time=00:00:01.17 bitrate=1791.7kbits/frame=  133 fps= 82 q=40.0 size=     768kB time=00:00:02.98 bitrate=2110.4kbits/frame=  164 fps= 76 q=40.0 size=    1280kB time=00:00:04.21 bitrate=2488.8kbits/frame=  185 fps= 70 q=40.0 size=    1792kB time=00:00:05.06 bitrate=2899.0kbits/frame=  195 fps= 61 q=40.0 size=    2048kB time=00:00:05.44 bitrate=3079.6kbits/frame=  206 fps= 55 q=40.0 size=    2560kB time=00:00:05.89 bitrate=3557.0kbits/frame=  218 fps= 51 q=40.0 size=    3072kB time=00:00:06.38 bitrate=3942.1kbits/frame=  230 fps= 47 q=40.0 size=    3584kB time=00:00:06.85 bitrate=4284.1kbits/frame=  242 fps= 44 q=40.0 size=    4096kB time=00:00:07.34 bitrate=4570.7kbits/frame=  251 fps= 42 q=37.0 size=    4352kB time=00:00:07.70 bitrate=4627.7kbits/frame=  265 fps= 41 q=40.0 size=    5376kB time=00:00:08.25 bitrate=5334.4kbits/frame=  272 fps= 39 q=40.0 size=    5632kB time=00:00:08.53 bitrate=5406.8kbits/frame=  283 fps= 37 q=40.0 size=    5888kB time=00:00:08.98 bitrate=5370.6kbits/frame=  296 fps= 37 q=40.0 size=    6400kB .04 bitrate=5549.0kbits/frame= 3001 fps= 21 q=-1.0 Lsize=  106530kB time=00:02:30.04 bitrate=5816.4kbits/s speed=1.07x    
video:64287kB audio:42199kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.041280%
[libx264 @ 0x7feadf81a600] frame I:33    Avg QP:33.56  size:113497
[libx264 @ 0x7feadf81a600] frame P:984   Avg QP:36.20  size: 35478
[libx264 @ 0x7feadf81a600] frame B:1984  Avg QP:37.44  size: 13696
[libx264 @ 0x7feadf81a600] consecutive B-frames: 11.5%  0.9%  0.9% 86.8%
[libx264 @ 0x7feadf81a600] mb I  I16..4:  3.4% 86.8%  9.7%
[libx264 @ 0x7feadf81a600] mb P  I16..4:  1.6% 13.7%  0.7%  P16..4: 44.3%  8.5%  7.0%  0.0%  0.0%    skip:24.2%
[libx264 @ 0x7feadf81a600] mb B  I16..4:  0.1%  1.1%  0.0%  B16..8: 47.6%  2.4%  0.3%  direct: 1.3%  skip:47.3%  L0:47.0% L1:51.3% BI: 1.7%
[libx264 @ 0x7feadf81a600] 8x8 transform intra:85.9% inter:88.3%
[libx264 @ 0x7feadf81a600] coded y,uvDC,uvAC intra: 67.9% 73.8% 13.9% inter: 20.8% 21.6% 0.6%
[libx264 @ 0x7feadf81a600] i16 v,h,dc,p: 48% 15%  4% 33%
[libx264 @ 0x7feadf81a600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 11% 27%  6%  7%  7%  7%  8%  7%
[libx264 @ 0x7feadf81a600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 15% 14%  7%  9%  9%  8%  6%  5%
[libx264 @ 0x7feadf81a600] i8c dc,h,v,p: 57% 12% 24%  7%
[libx264 @ 0x7feadf81a600] Weighted P-Frames: Y:0.1% UV:0.1%
[libx264 @ 0x7feadf81a600] ref P L0: 69.1% 21.7%  9.2%  0.0%
[libx264 @ 0x7feadf81a600] ref B L0: 87.2% 10.4%  2.5%
[libx264 @ 0x7feadf81a600] ref B L1: 94.9%  5.1%
[libx264 @ 0x7feadf81a600] kb/s:4387.16
WU:~ user$ 


  


• Batch processing using globs with libfdkaac and compiled libraries in ffmpeg (all .wav files in a folder)

  21 avril 2021, par Josh Vamos

  I am trying to process a folder full of media in .WAV format.
I have compiled ffmpeg with the libraries I want but I cannot figure out how I would do batch conversion.
I have looked at the Execute "ffmpeg" command in a loop

  


  I can't wrap my head around how I would point the program to the correct file path while keeping the syntax intact.

  


  .\fdkaac.exe -m 3 'X:\PATH\file.wav' -o 'X:\PATH\file.m4a'


  


• avformat/id3v2 : Don't reverse the order of id3v2 APICs

  13 avril 2021, par Andreas Rheinhardt

  avformat/id3v2 : Don't reverse the order of id3v2 APICs
  When parsing ID3v2 tags, special (non-text) metadata is not applied
  
  directly and unconditionally ; instead it is stored in a linked list
  
  in which elements are prepended. When traversing the list to add APICs
  
  (or private tags) at the end, the order is reversed. The same also
  
  happens for chapters and therefore the chapter parsing code already
  
  reverses the chapters.
  This commit changes this : By keeping pointers to both head and tail
  
  of the linked list one can preserve the order of the entries and
  
  remove the reordering code for chapters. Only the pointer to head
  
  will be exported : No current caller uses a nonempty list, so exporting
  
  both head and tail is unnecessary. This removes the functionality
  
  to combine the lists of special metadata read from different ID3v2 tags,
  
  but that doesn't make really much sense anyway (and would be trivial
  
  to implement if desired) and allows to remove the now unnecessary
  
  initializations performed by the callers.
  The FATE-reference for the id3v2-priv test had to be updated
  
  because the order of the tags read into the dict is reversed ;
  
  for id3v2-priv-remux only the md5 and not the ffprobe output
  
  of the remuxed file changes because the order of the private tags
  
  has up until now been reversed twice.
  The references for the aiff/mp3 cover-art tests needed to be updated,
  
  because the order of the attached pics is reversed upon reading.
  
  It is still not correct, because the muxers write the pics in the order
  
  in which they arrive at the muxer instead of the order given by
  
  pkt->stream_index.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavformat/aacdec.c
  • [DH] libavformat/aiffdec.c
  • [DH] libavformat/asf.c
  • [DH] libavformat/dsfdec.c
  • [DH] libavformat/id3v2.c
  • [DH] libavformat/id3v2.h
  • [DH] libavformat/iff.c
  • [DH] libavformat/omadec.c
  • [DH] libavformat/wavdec.c
  • [DH] tests/ref/fate/cover-art-aiff-id3v2-remux
  • [DH] tests/ref/fate/cover-art-mp3-id3v2-remux
  • [DH] tests/ref/fate/id3v2-priv
  • [DH] tests/ref/fate/id3v2-priv-remux