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• avcodec_find_decoder() can't find AV_CODEC_ID_WMAV2 even through CLI can parse WMAs on macOS ?

  3 octobre 2023, par grendell

  I am following the decode_audio.c example from FFmpeg, but I am unable to initialize a parser for AV_CODEC_ID_WMAV2.

  


  Test code :

  


  #include &#xA;#include <libavcodec></libavcodec>avcodec.h>&#xA;&#xA;int main() {&#xA;    // codec is found successfully&#xA;    const AVCodec * codec = avcodec_find_decoder(AV_CODEC_ID_WMAV2);&#xA;    if (!codec) {&#xA;        fprintf(stderr, "codec not found\n");&#xA;        return 1;&#xA;    }&#xA;&#xA;    // parser is always NULL&#xA;    AVCodecParserContext * parser = av_parser_init(codec->id);&#xA;    if (!parser) {&#xA;        fprintf(stderr, "parser not found\n");&#xA;        return 1;&#xA;    }&#xA;&#xA;    av_parser_close(parser);&#xA;    return 0;&#xA;}&#xA;

  


  Build commands :

  


  clang -c -I/opt/homebrew/Cellar/ffmpeg/6.0_1/include wma2mp3.c -o obj/wma2mp3.o
clang -L/opt/homebrew/Cellar/ffmpeg/6.0_1/lib -lavcodec obj/wma2mp3.o -o wma2mp3


  


  I'm surprised by the fact that the FFmpeg CLI can perform this operation on the same machine :

  


  % ffmpeg -i test.wma test.mp3
ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with Apple clang version 14.0.3 (clang-1403.0.22.14.1)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.0_1 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --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-audiotoolbox --enable-neon
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, asf, from 'test.wma':
  Metadata:
    ToolName        : Windows Media Encoding Utility
    ToolVersion     : 8.00.00.0343
  Duration: 00:00:00.74, start: 0.000000, bitrate: 80 kb/s
  Stream #0:0: Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 1 channels, fltp, 48 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (wmav2 (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
Output #0, mp3, to 'test.mp3':
  Metadata:
    ToolName        : Windows Media Encoding Utility
    ToolVersion     : 8.00.00.0343
    TSSE            : Lavf60.3.100
  Stream #0:0: Audio: mp3, 44100 Hz, mono, fltp
    Metadata:
      encoder         : Lavc60.3.100 libmp3lame
[libmp3lame @ 0x130706320] Queue input is backward in timeed=N/A    
[mp3 @ 0x1307056e0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 15668 >= 14764
size=       8kB time=00:00:00.97 bitrate=  65.8kbits/s speed= 103x    
video:0kB audio:8kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 4.048112%


  


  I am using an Apple M1 machine running MacOS 13.5.2 (22G91).

  


  Is the CLI using a different mechanism than av_parser_parse2 to perform this conversion, and is there a better way to accomplish this via the C API ?

  


• When I use ffprobe to check a video stream，I get the error below [closed]

  21 mai 2024, par dongrixinyu

  I came across with a problem when ffprobe and decoding video stream .

  


  Here is the log :

  


  ffprobe version 6.1.1 Copyright (c) 2007-2023 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.2)
  configuration: --enable-gpl --enable-version3 --enable-shared --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libzvbi --enable-libwebp --enable-libx264 --enable-libx265 --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libmfx --enable-opencl --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libmysofa --enable-librubberband --enable-libsoxr
  libavutil      58. 29.100 / 58. 29.100
  libavcodec     60. 31.102 / 60. 31.102
  libavformat    60. 16.100 / 60. 16.100
  libavdevice    60.  3.100 / 60.  3.100
  libavfilter     9. 12.100 /  9. 12.100
  libswscale      7.  5.100 /  7.  5.100
  libswresample   4. 12.100 /  4. 12.100
  libpostproc    57.  3.100 / 57.  3.100
[NULL @ 0x5595d3e72040] illegal reordering_of_pic_nums_idc 7
[h264 @ 0x5595d3e72040] illegal modification_of_pic_nums_idc 7
[h264 @ 0x5595d3e72040] decode_slice_header error
[h264 @ 0x5595d3e72040] no frame!
[h264 @ 0x5595d3e72040] decode_slice_header error
[h264 @ 0x5595d3e72040] no frame!
[h264 @ 0x5595d3e72040] reference overflow 66 > 15 or 0 > 15
    Last message repeated 1 times
[h264 @ 0x5595d3e72040] decode_slice_header error
[h264 @ 0x5595d3e72040] no frame!
[h264 @ 0x5595d3e72040] chroma_log2_weight_denom 27 is out of range
    Last message repeated 1 times
[h264 @ 0x5595d3e72040] Missing reference picture, default is 4
[h264 @ 0x5595d3e72040] concealing 8144 DC, 8144 AC, 8144 MV errors in P frame
[h264 @ 0x5595d3e72040] top block unavailable for requested intra mode
[h264 @ 0x5595d3e72040] error while decoding MB 4 0, bytestream 12113
[h264 @ 0x5595d3e72040] concealing 8160 DC, 8160 AC, 8160 MV errors in P frame
[h264 @ 0x5595d3e72040] illegal short term buffer state detected
[h264 @ 0x5595d3e72040] top block unavailable for requested intra mode -1
[h264 @ 0x5595d3e72040] error while decoding MB 1 0, bytestream 9617
[h264 @ 0x5595d3e72040] concealing 8160 DC, 8160 AC, 8160 MV errors in P frame
[h264 @ 0x5595d3e72040] illegal short term buffer state detected
[h264 @ 0x5595d3e72040] luma_log2_weight_denom 15 is out of range
    Last message repeated 1 times
[h264 @ 0x5595d3e72040] top block unavailable for requested intra mode
[h264 @ 0x5595d3e72040] error while decoding MB 4 0, bytestream 12323
[h264 @ 0x5595d3e72040] concealing 8160 DC, 8160 AC, 8160 MV errors in P frame
[h264 @ 0x5595d3e72040] illegal short term buffer state detected
[h264 @ 0x5595d3e72040] top block unavailable for requested intra mode -1
[h264 @ 0x5595d3e72040] error while decoding MB 27 0, bytestream 12229
[h264 @ 0x5595d3e72040] concealing 8160 DC, 8160 AC, 8160 MV errors in P frame
[h264 @ 0x5595d3e72040] illegal short term buffer state detected
[h264 @ 0x5595d3e72040] illegal reordering_of_pic_nums_idc 15 
[h264 @ 0x5595d3e72040] illegal modification_of_pic_nums_idc 15
[h264 @ 0x5595d3e72040] decode_slice_header error 
[h264 @ 0x5595d3e72040] no frame!
[h264 @ 0x5595d3e72040] reference count 1 overflow
[h264 @ 0x5595d3e72040] reference count overflow
[h264 @ 0x5595d3e72040] decode_slice_header error 
[h264 @ 0x5595d3e72040] no frame!
[h264 @ 0x5595d3e72040] luma_log2_weight_denom 31 is out of range
[h264 @ 0x5595d3e72040] illegal memory management control operation 21
[h264 @ 0x5595d3e72040] luma_log2_weight_denom 31 is out of range
[h264 @ 0x5595d3e72040] illegal memory management control operation 21
[h264 @ 0x5595d3e72040] deblocking filter parameters -7 0 out of range
[h264 @ 0x5595d3e72040] decode_slice_header error 
[h264 @ 0x5595d3e72040] no frame!
[h264 @ 0x5595d3e72040] Reference 6 >= 3
[h264 @ 0x5595d3e72040] error while decoding MB 29 0, bytestream 8581
[h264 @ 0x5595d3e72040] concealing 8160 DC, 8160 AC, 8160 MV errors in P frame
[h264 @ 0x5595d3e72040] number of reference frames (0+4) exceeds max (3; probably corrupt input), discarding one
[h264 @ 0x5595d3e72040] chroma_log2_weight_denom 15 is out of range
    Last message repeated 1 times
[h264 @ 0x5595d3e72040] deblocking_filter_idc 13 out of range
[h264 @ 0x5595d3e72040] decode_slice_header error 
[h264 @ 0x5595d3e72040] no frame!
[h264 @ 0x5595d3e72040] deblocking_filter_idc 32 out of range
[h264 @ 0x5595d3e72040] decode_slice_header error
[h264 @ 0x5595d3e72040] no frame!
[h264 @ 0x5595d3e72040] illegal reordering_of_pic_nums_idc 31
[h264 @ 0x5595d3e72040] illegal modification_of_pic_nums_idc 31
[h264 @ 0x5595d3e72040] decode_slice_header error 
[h264 @ 0x5595d3e72040] no frame!
[h264 @ 0x5595d3e72040] illegal reordering_of_pic_nums_idc 6
[h264 @ 0x5595d3e72040] illegal modification_of_pic_nums_idc 6
[h264 @ 0x5595d3e72040] decode_slice_header error 



  


  I executed both ffprobe xxxx.mp4 and avcodec receive frame functions to decode one frame. reproduced the same error log.

  


  But when I open it using VLC or OBS it worked well. So,

  


  

  • does any error when I configure the options of ffmpeg ?

  


  • how to fix this problem ?

  


  


  the mp4 file I upload a piece in mp4 link

  


• Can't fix this ffmpeg, NoClassDefFoundError

  15 mars 2023, par noob234

  I am trying to get the video duration with this library import org.bytedeco.javacv.FFmpegFrameGrabber;

  


  When I upload this mp4 video (https://sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4), I get this error message :
java.lang.NoClassDefFoundError: Could not initialize class org.bytedeco.ffmpeg.global.avutil

  


  It will break when trying to get the 'grabber' :

  


  private void videoInfo(MultipartFile file) {
    try (FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(file.getInputStream())) { // on this line it will break :(
        grabber.start();
        long durationMs = grabber.getLengthInTime();
    } catch (FrameGrabber.Exception e) {
        throw new RuntimeException(e);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}


  


  This is my build.gradle :

  


  plugins {
    id 'java'
    id 'org.springframework.boot' version '2.7.9'
    id 'io.spring.dependency-management' version '1.0.15.RELEASE'
}

group = 'com.nob234'
version = '0.0.1-SNAPSHOT'

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web'
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
    implementation 'org.springdoc:springdoc-openapi-ui:1.6.9'
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    runtimeOnly 'org.postgresql:postgresql'
    // for logging
    implementation 'org.slf4j:slf4j-api:1.7.30'
    implementation 'org.slf4j:jcl-over-slf4j:1.7.30'
    implementation 'org.slf4j:log4j-over-slf4j:1.7.30'
    implementation 'ch.qos.logback:logback-classic:1.2.3'
    implementation 'org.bytedeco:javacv:1.5.8'
}

tasks.named('test') {
    useJUnitPlatform()
}


  


  This is my ffmpeg version :

  


  ffmpeg version 6.0-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
built with gcc 12.2.0 (Rev10, 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      58.  2.100 / 58.  2.100
libavcodec     60.  3.100 / 60.  3.100
libavformat    60.  3.100 / 60.  3.100
libavdevice    60.  1.100 / 60.  1.100
libavfilter     9.  3.100 /  9.  3.100
libswscale      7.  1.100 /  7.  1.100
libswresample   4. 10.100 /  4. 10.100
libpostproc    57.  1.100 / 57.  1.100


  


  Please keep in mind that I use Java 8 in this project and I hope this issue is reproducible. If you want more info please leave a comment.