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• Cropping a video from Sony A7 Camera using ffmpeg

  23 octobre 2023, par Mike Slinn

  I want to crop a video file created by a Sony A7iii camera, so only the portion from 0:51 through 2:45 is extracted.
The camera adds streams that need to be ignored.

  


  ffprobe shows the error on input stream 2, however the problem I am reporting deals with input stream 3, which is a data stream, and is not required. I want to exclude input stream 3, then deal with input stream 2.

  


  $ ffprobe myfile.mp4
ffprobe version 3.0-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2007-2016 the FFmpeg developers
  built with gcc 5.3.1 (Debian 5.3.1-8) 20160205
  configuration: --enable-gpl --enable-version3 --disable-shared --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls --enable-libvidstab --enable-libsoxr --enable-frei0r --enable-libfribidi --disable-indev=sndio --disable-outdev=sndio --enable-librtmp --enable-libmfx --cc=gcc
  libavutil      55. 17.103 / 55. 17.103
  libavcodec     57. 24.102 / 57. 24.102
  libavformat    57. 25.100 / 57. 25.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 31.100 /  6. 31.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'myfile.mp4':
  Metadata:
    major_brand     : XAVC
    minor_version   : 16785407
    compatible_brands: XAVCmp42iso2
    creation_time   : 2023-01-05 00:52:24
  Duration: 00:10:58.16, start: 0.000000, bitrate: 51445 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-4), 1920x1080 [SAR 1:1 DAR 16:9], 49370 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
    Metadata:
      creation_time   : 2023-01-05 00:52:24
      handler_name    : Video Media Handler
      encoder         : AVC Coding
    Stream #0:1(und): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, 2 channels, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2023-01-05 00:52:24
      handler_name    : Sound Media Handler
    Stream #0:2(und): Data: none (rtmd / 0x646D7472), 491 kb/s (default)
    Metadata:
      creation_time   : 2023-01-05 00:52:24
      handler_name    : Timed Metadata Media Handler
Unsupported codec with id 0 for input stream 2


  


  Predictably, ffmpeg fails because ffprobe failed.

  


  $ ffmpeg -y -i 'myfile.mp4' -ss 51 -to 2:45 -acodec copy 'myfile.crop.mp4'
ffmpeg version 5.1.2-3ubuntu1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 12 (Ubuntu 12.2.0-14ubuntu2)
  configuration: --prefix=/usr --extra-version=3ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --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-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
  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 @ 0x55d61a97fc80] st: 0 edit list: 1 Missing key frame while searching for timestamp: 1001
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55d61a97fc80] st: 0 edit list 1 Cannot find an index entry before timestamp: 1001.
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'myfile.mp4':
  Metadata:
    major_brand     : XAVC
    minor_version   : 16785407
    compatible_brands: XAVCmp42iso2
    creation_time   : 2023-01-05T00:52:24.000000Z
  Duration: 00:10:58.16, start: 0.000000, bitrate: 51445 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/iec61966-2-4, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 49370 kb/s, 59.94 fps, 59.94 tbr, 60k tbn (default)
    Metadata:
      creation_time   : 2023-01-05T00:52:24.000000Z
      handler_name    : Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
  Stream #0:1[0x2](und): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2023-01-05T00:52:24.000000Z
      handler_name    : Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](und): Data: none (rtmd / 0x646D7472), 491 kb/s (default)
    Metadata:
      creation_time   : 2023-01-05T00:52:24.000000Z
      handler_name    : Timed Metadata Media Handler
      timecode        : 03:52:30:26
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[libx264 @ 0x55d61aa58a80] using SAR=1/1
[libx264 @ 0x55d61aa58a80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x55d61aa58a80] profile High, level 4.2, 4:2:0, 8-bit
[libx264 @ 0x55d61aa58a80] 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=34 lookahead_threads=5 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
[mp4 @ 0x55d61aa57cc0] Could not find tag for codec pcm_s16be in stream #1, codec not currently supported in container
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:0 --
Conversion failed!


  


  I tried various incantations that specified permutations of -map options, but only dug myself a deeper hole.

  


  How might I perform the extraction ? I am not interested in preserving extra streams, I just want the main video and stereo audio streams.

  


• memcpy to av_malloc's memory crash

  26 octobre 2023, par PeacefulWindy

  I use the code in x64 windows :

  


  #include<iostream>&#xA;#include<memory>&#xA;#include<vector>&#xA;extern "C"&#xA;{&#xA;#include <libavcodec></libavcodec>avcodec.h>&#xA;#include<libavformat></libavformat>avformat.h>&#xA;#include <libavutil></libavutil>imgutils.h>&#xA;#include<libswscale></libswscale>swscale.h>&#xA;#include<libswresample></libswresample>swresample.h>&#xA;}&#xA;&#xA;struct BufferData&#xA;{&#xA;    uint8_t* ptr;&#xA;    size_t size;&#xA;    size_t file_size;&#xA;};&#xA;&#xA;int main()&#xA;{&#xA;    auto file=fopen("E:/test.jpg", "rb");&#xA;    fseek(file, 0, SEEK_END);&#xA;    auto fileSize = ftell(file);&#xA;    fseek(file, 0, SEEK_SET);&#xA;    auto data = std::vector(fileSize);&#xA;    fread(data.data(), sizeof(uint8_t), fileSize, file);&#xA;    fclose(file);&#xA;&#xA;    auto test = BufferData();&#xA;    test.ptr = data.data();&#xA;    test.size = data.size();&#xA;    test.file_size = data.size();&#xA;    auto buffer = (uint8_t*)av_malloc(4096 * 10);&#xA;    char errStr[128] = { 0 };&#xA;&#xA;    auto avformatContext = avformat_alloc_context();&#xA;    auto avioContext = avio_alloc_context(buffer, 4096, 0, &amp;test, [](void* opaque, uint8_t* buf, int buf_size)&#xA;        {&#xA;            BufferData* bd = (BufferData*)opaque;&#xA;            auto size = std::min(bd->size, (size_t)buf_size);&#xA;&#xA;            if (!size)&#xA;            {&#xA;                return -1;&#xA;            }&#xA;&#xA;            memcpy(buf, bd->ptr, size);&#xA;            bd->ptr &#x2B;= size;&#xA;            bd->size -= size;&#xA;            return (int)size;&#xA;        }, NULL, NULL);&#xA;    avformatContext->pb = avioContext;&#xA;    avformatContext->flags = AVFMT_FLAG_CUSTOM_IO;&#xA;&#xA;    auto ret = avformat_open_input(&amp;avformatContext, nullptr, nullptr, nullptr);&#xA;    if (ret != 0)&#xA;    {&#xA;        av_strerror(ret, errStr, sizeof(errStr));&#xA;        std::cout &lt;&lt; errStr &lt;&lt; std::endl;&#xA;        av_free(buffer);&#xA;        avformat_close_input(&amp;avformatContext);&#xA;        return 0;&#xA;    }&#xA;&#xA;    ret = avformat_find_stream_info(avformatContext, nullptr);&#xA;    if (ret &lt; 0)&#xA;    {&#xA;        av_strerror(ret, errStr, sizeof(errStr));&#xA;        std::cout &lt;&lt; errStr &lt;&lt; std::endl;&#xA;        av_free(buffer);&#xA;        avformat_close_input(&amp;avformatContext);&#xA;        return 0;&#xA;    }&#xA;&#xA;    av_dump_format(avformatContext, 0, nullptr, 0);&#xA;&#xA;    auto videoIndex = av_find_best_stream(avformatContext, AVMEDIA_TYPE_VIDEO, -1, -1, nullptr, 0);&#xA;    if (videoIndex == AVERROR_STREAM_NOT_FOUND)&#xA;    {&#xA;        av_free(buffer);&#xA;        avformat_close_input(&amp;avformatContext);&#xA;        return 0;&#xA;    }&#xA;    else if (videoIndex == AVERROR_DECODER_NOT_FOUND)&#xA;    {&#xA;        av_free(buffer);&#xA;        avformat_close_input(&amp;avformatContext);&#xA;        return 0;&#xA;    }&#xA;&#xA;    auto videoCodecPar = avformatContext->streams[videoIndex]->codecpar;&#xA;    auto videoCodec = avcodec_find_decoder(videoCodecPar->codec_id);&#xA;    if (!videoCodec)&#xA;    {&#xA;        av_free(buffer);&#xA;        avformat_close_input(&amp;avformatContext);&#xA;        return 0;&#xA;    }&#xA;&#xA;    av_free(buffer);&#xA;    avformat_close_input(&amp;avformatContext);&#xA;}&#xA;</vector></memory></iostream>

  


  I use memcpy to copy data to buffer,it run to av_free(buffer) get crash.
ffmpeg version is 6.0.
Visual Studio version is 2022 with CMake.

  


  Use fread replace memcpy,it can work !But I need to resolve load from std::vector memory,not fread.
I think maybe memory-align problem when run av_free,but I no way to find the cause.

  


• FFmpeg batchfile to compress images JPG JPEGs and keep EXIF (metadata)

  24 novembre 2023, par esdoublelef

  I tried searching everywhere for a possible solution but I really can't find it. Hope someone can help me out here.

  


  I have written a batch file to use FFmpeg to compress and sharpen JPGs in a folder.

  


  @ECHO ON
  FOR %%a in (*.jpg) DO (ffmpeg -i "%%a" -q:v 8 -vf unsharp=5:5:1.0:5:5:0.0 "2022 01 22 %%~na".jpg)
PAUSE


  


  The new file comes out smaller in size, but is missing all the EXIF information that the original photo has.

  


  I tried to add in the command -metadata but apparently it works for MP4 only. I have an existing solution with ImageMagick but I'm hoping to solve this via FFmpeg.

  


  Or is there a way to integrate exiftool into the batch file ?

  


  Thank you and I really appreciate any help here.