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• why would ffmpeg rotate 2nd video on concatenation when I don't want it to or seemingly ask for it ?

  10 janvier 2023, par Pompey Magnus

  here is the command I run :

  


  ffmpeg -f concat -an -i ./files.txt ztestout.mp4


  


  I have about 5 videos, but just to test I did with two.
the 2nd video gets flipped upside down, even though opening each video in VLC opens and plays them correctly.

  


  Any ideas why it would do that ? Is the metadata wrong in the video ? I took all the videos I'm trying to concat with the same android phone.

  


  output below, and I noticed its says rotation zero degrees :

  


  ffmpeg version 5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 14.0.0 (clang-1400.0.29.102)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/5.1.2 --enable-shared --enable-pthreads --enable-version3 --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-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --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 --enable-neon
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x138804730] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from './files.txt':
  Duration: N/A, start: 0.000000, bitrate: 17255 kb/s
  Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, smpte170m, progressive), 1920x1080, 16999 kb/s, SAR 1:1 DAR 16:9, 30.01 fps, 30 tbr, 90k tbn
    Metadata:
      creation_time   : 2023-01-08T13:32:50.000000Z
      handler_name    : VideoHandle
      vendor_id       : [0][0][0][0]
    Side data:
      displaymatrix: rotation of -180.00 degrees
  Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s
    Metadata:
      creation_time   : 2023-01-08T13:32:50.000000Z
      handler_name    : SoundHandle
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x137f07fe0] using SAR=1/1
[libx264 @ 0x137f07fe0] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x137f07fe0] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0x137f07fe0] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - 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=15 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 'ztestout.mp4':
  Metadata:
    encoder         : Lavf59.27.100
  Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuvj420p(pc, smpte170m, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 30 fps, 15360 tbn
    Metadata:
      creation_time   : 2023-01-08T13:32:50.000000Z
      handler_name    : VideoHandle
      vendor_id       : [0][0][0][0]
      encoder         : Lavc59.37.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
      displaymatrix: rotation of -0.00 degrees
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x138904b40] Auto-inserting h264_mp4toannexb bitstream filterdrop=20 speed=3.67x    
frame=74497 fps=109 q=-1.0 Lsize= 1740353kB time=00:41:23.13 bitrate=5741.5kbits/s dup=0 drop=25 speed=3.64x    
video:1739531kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.047236%
[libx264 @ 0x137f07fe0] frame I:300   Avg QP:20.73  size:294110
[libx264 @ 0x137f07fe0] frame P:29265 Avg QP:23.65  size: 45500
[libx264 @ 0x137f07fe0] frame B:44932 Avg QP:27.95  size:  8045
[libx264 @ 0x137f07fe0] consecutive B-frames: 19.4%  0.4%  0.7% 79.5%
[libx264 @ 0x137f07fe0] mb I  I16..4:  5.5% 43.8% 50.7%
[libx264 @ 0x137f07fe0] mb P  I16..4:  0.2%  0.9%  0.7%  P16..4: 36.9% 13.9% 10.8%  0.0%  0.0%    skip:36.6%
[libx264 @ 0x137f07fe0] mb B  I16..4:  0.0%  0.1%  0.1%  B16..8: 30.0%  3.0%  1.3%  direct: 1.1%  skip:64.3%  L0:38.1% L1:55.8% BI: 6.1%
[libx264 @ 0x137f07fe0] 8x8 transform intra:49.7% inter:45.0%
[libx264 @ 0x137f07fe0] coded y,uvDC,uvAC intra: 84.0% 82.3% 41.9% inter: 12.8% 10.8% 0.5%
[libx264 @ 0x137f07fe0] i16 v,h,dc,p: 30% 17%  8% 45%
[libx264 @ 0x137f07fe0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 25% 12%  4%  7%  7% 12%  7%  8%
[libx264 @ 0x137f07fe0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 25% 12%  5%  7%  7% 10%  6%  8%
[libx264 @ 0x137f07fe0] i8c dc,h,v,p: 47% 22% 22%  9%
[libx264 @ 0x137f07fe0] Weighted P-Frames: Y:0.3% UV:0.0%
[libx264 @ 0x137f07fe0] ref P L0: 70.3% 10.7% 13.9%  5.0%  0.0%
[libx264 @ 0x137f07fe0] ref B L0: 91.8%  6.2%  2.0%
[libx264 @ 0x137f07fe0] ref B L1: 95.7%  4.3%
[libx264 @ 0x137f07fe0] kb/s:5738.58


  


• Use FFMPEG to convert MP4/AAC to MP3 without audio time getting shortened

  10 janvier 2023, par Esenkay07

  I've been struggling with extracting the audio from a couple of mp4 files I have. I have tried using all of the different answers posted previously on Stack Overflow, but each of them results in an mp3 file that's shorter than the original mp4.

  


  If anyone has any insights as to what I'm doing wrong, that'd be greatly appreciated, or at the very least why it's not this simple to convert from mp4 to mp3.

  


  I have tried copying the codec and using variable bitrate. The input video is 1:24:56, but the output audio is 1:24:46.

  


  Command : ffmpeg -i sample.mp4 -c:v copy -q:a 0 sample.mp3

  


  Output :

  


  $ffmpeg -i sample.mp4 -c:v copy -q:a 0 sample.mp3

ffmpeg version 2023-01-09-git-13d04e30d7-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      57. 43.100 / 57. 43.100
  libavcodec     59. 56.100 / 59. 56.100
  libavformat    59. 34.102 / 59. 34.102
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 53.100 /  8. 53.100
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
  libpostproc    56.  7.100 / 56.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 01:24:56.57, start: 0.000000, bitrate: 612 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 480 kb/s, 29.94 fps, 30 tbr, 90k tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:1 -> #0:0 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
Output #0, mp3, to 'sample.mp3':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    TSSE            : Lavf59.34.102
  Stream #0:0(und): Audio: mp3, 44100 Hz, stereo, fltp (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
      encoder         : Lavc59.56.100 libmp3lame
size=   88336kB time=01:24:56.54 bitrate= 142.0kbits/s speed= 172x
video:0kB audio:88336kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000394%


  


• FFmpeg with Quicksync : unable to hardware decode file

  9 juin 2023, par MuchToKnow

  I'm trying to convert a h264 video to h265 using hardware decoding/decoding of the iGPU (Quicksync). Decoding does not work throwing the error "Impossible to convert between the formats supported by the filter 'graph 0 input from stream 0:0' and the filter 'auto_scaler_0'"

  


  I'm using the most basic example from https://trac.ffmpeg.org/wiki/Hardware/QuickSync. Hardware encoding works (in this example it's software decoded)

  


  ffmpeg -v verbose -hwaccel qsv -i VID_20230526_174925.mp4 -c:v hevc_qsv -b:v 5M output.mp4


  


  but hardware decoding does not work :

  


  ffmpeg -v verbose -hwaccel qsv -c:v h264_qsv -i VID_20230526_174925.mp4 -f null -


  


  I'm out of ideas.

  


  Full ffmpeg output :

  


  ffmpeg version 4.3.6-0+deb11u1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 10 (Debian 10.2.1-6)
  configuration: --prefix=/usr --extra-version=0+deb11u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  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
[h264 @ 0x55d0c3b3bfc0] Reinit context to 1920x1088, pix_fmt: yuv420p
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'VID_20230526_174925.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2023-05-26T15:49:25.000000Z
    com.android.version: 10
  Duration: 00:01:22.88, start: 0.000000, bitrate: 14784 kb/s
    Stream #0:0(eng): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, bt709, left), 1920x1080 (1920x1088), 14517 kb/s, SAR 1:1 DAR 16:9, 29.69 fps, 29.75 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      rotate          : 90
      creation_time   : 2023-05-26T15:49:25.000000Z
      handler_name    : VideoHandle
    Side data:
      displaymatrix: rotation of -90.00 degrees
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 191 kb/s (default)
    Metadata:
      creation_time   : 2023-05-26T15:49:25.000000Z
      handler_name    : SoundHandle
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (h264_qsv) -> wrapped_avframe (native))
  Stream #0:1 -> #0:1 (aac (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[graph_1_in_0_1 @ 0x55d0c3ba67c0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
[format_out_0_1 @ 0x55d0c3b5f100] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
[auto_resampler_0 @ 0x55d0c3b81900] ch:2 chl:stereo fmt:fltp r:48000Hz -> ch:2 chl:stereo fmt:s16 r:48000Hz
[AVHWDeviceContext @ 0x55d0c3bb4640] Trying to use DRM render node for device 0, with matching kernel driver (i915).
[AVHWDeviceContext @ 0x55d0c3bb4640] libva: VA-API version 1.10.0
[AVHWDeviceContext @ 0x55d0c3bb4640] libva: User requested driver 'iHD'
[AVHWDeviceContext @ 0x55d0c3bb4640] libva: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
[AVHWDeviceContext @ 0x55d0c3bb4640] libva: Found init function __vaDriverInit_1_10
[AVHWDeviceContext @ 0x55d0c3bb4640] libva: va_openDriver() returns 0
[AVHWDeviceContext @ 0x55d0c3bb4640] Initialised VAAPI connection: version 1.10
[AVHWDeviceContext @ 0x55d0c3bb4640] VAAPI driver: Intel iHD driver for Intel(R) Gen Graphics - 21.1.1 ().
[AVHWDeviceContext @ 0x55d0c3bb4640] Driver not found in known nonstandard list, using standard behaviour.
[AVHWDeviceContext @ 0x55d0c3bbc080] Initialize MFX session: API version is 1.34, implementation version is 1.34
[AVHWDeviceContext @ 0x55d0c3d4d200] VAAPI driver: Intel iHD driver for Intel(R) Gen Graphics - 21.1.1 ().
[AVHWDeviceContext @ 0x55d0c3d4d200] Driver not found in known nonstandard list, using standard behaviour.
[h264_qsv @ 0x55d0c3b59940] Decoder: output is video memory surface
[AVHWDeviceContext @ 0x55d0c3d82640] VAAPI driver: Intel iHD driver for Intel(R) Gen Graphics - 21.1.1 ().
[AVHWDeviceContext @ 0x55d0c3d82640] Driver not found in known nonstandard list, using standard behaviour.
[h264_qsv @ 0x55d0c3b59940] Decoder: output is video memory surface
[graph 0 input from stream 0:0 @ 0x55d0c3da30c0] w:1920 h:1080 pixfmt:qsv tb:1/90000 fr:119/4 sar:1/1
[auto_scaler_0 @ 0x55d0c3d6f2c0] w:iw h:ih flags:'bicubic' interl:0
[transpose @ 0x55d0c3de3600] auto-inserting filter 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0' and the filter 'transpose'
Impossible to convert between the formats supported by the filter 'graph 0 input from stream 0:0' and the filter 'auto_scaler_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0
[AVIOContext @ 0x55d0c3b43140] Statistics: 670703 bytes read, 3 seeks


  


  Tried to hardware decode a h264 file and it results in the error

  


  Impossible to convert between the formats supported by the filter 'graph 0 input from stream 0:0' and the filter 'auto_scaler_0'