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• Flutter ffmpeg_kit_flutter_new can't build Android app in any version

  13 May, by user31929

  I can't build my project on Android ( on Ios it works and the project itself without ffmpeg_kit_flutter_new builds without problems )
This is the error i obtain:

  


  /GeneratedPluginRegistrant.java:51: error: cannot find symbol
      com.antonkarpenko.ffmpegkit.MainActivity.registerWith(shimPluginRegistry.registrarFor("com.antonkarpenko.ffmpegkit.MainActivity"));
                                 ^
  symbol:   class MainActivity
  location: package com.antonkarpenko.ffmpegkit


  


  This is my flutter doctor :

  


  [✓] Flutter (Channel stable, 3.19.4, on macOS 15.4.1 24E263 darwin-x64, locale it-IT)
    • Flutter version 3.19.4 on channel stable at ….
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 68bfaea224 (1 year, 2 months ago), 2024-03-20 15:36:31 -0700
    • Engine revision a5c24f538d
    • Dart version 3.3.2
    • DevTools version 2.31.1

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at …..
    • Platform android-35, build-tools 34.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16E140
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2023.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)

[✓] VS Code (version 1.99.3)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.110.0

[✓] Connected device (5 available)
    • SM A135F (mobile)              • RF8T40TMS6Z               • android-arm    • Android 12 (API 31)
    • cri SE 128 (mobile)      • 00008030-001268303E38402E • ios            • iOS 18.4.1 22E252
    • iPhone di WacMini (mobile) • 00008030-00121D543CE8802E • ios            • iOS 18.4.1 22E252
    • macOS (desktop)                • macos                     • darwin-x64     • macOS 15.4.1 24E263 darwin-x64
    • Chrome (web)                   • chrome                    • web-javascript • Google Chrome 136.0.7103.93

[✓] Network resources
    • All expected network resources are available.


  


  My android/app/build.gradle

  


  def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'
apply plugin: 'org.jetbrains.kotlin.android'


android {

    compileSdkVersion 35

    namespace = "com.app.app"
    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        applicationId "com.appid.appid"
        minSdkVersion 24
        targetSdkVersion 35
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
       
        // insert this line of code in order to manage correct build abi configuration only on supported devices not supported tablet device emulator
       /* ndk {
            abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86_64'
        }*/
    }

    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
            storePassword keystoreProperties['storePassword']
        }
    }

    buildTypes {
        debug {
            debuggable true
        }

        release {
            signingConfig signingConfigs.release
            debuggable false
            shrinkResources true
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib:1.9.24"
}


  


  My android/build.gradle

  


  buildscript {
    ext.kotlin_version = '1.9.24'
    repositories {
        google()
        mavenCentral()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:8.4.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.14'
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.7.1'
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
        jcenter()
    }

    
    subprojects {
        tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile) {
            kotlinOptions.jvmTarget = "1.8"
        }
        afterEvaluate { project ->
            if (project.hasProperty('android')) {
                project.android {
                    if (namespace == null) {
                        namespace project.group
                    }
                }
            }
        }
    }
    
}


ext {
    flutterFFmpegPackage = "min-gpl-lts"
}


rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

tasks.register("clean", Delete) {
    delete rootProject.buildDir
}


  


  My gradle.wrapper.properties

  


  distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-all.zip


  


  What i have already tried :

  


  

  • flutter clean/flutter pub get

  


  • remove .gradle folder/flutter clean/flutter pub get

  


  • remove GeneratedPluginRegistrant.java file then remove .gradle/flutter clean/flutter pub get

  


  


  I have this issue in every version of the plugin. There is something wrong in my configurations or maybe this is a plugin issue ?

  


• FFMPEG C Library: Encoding h264 stream into Matroska .mkv container creates corrupt files

  16 March 2024, by Marvin Killing

  I want to use the FFMPEG C Library to create a Matroska Video .mkv file with only an h264 stream, but the resulting .mkv file comes out corrupt.

  


  The file cannot be played back with Windows Media Player, ffplay, or VLC, and when I try to ffprobe the resulting file, these are the error messages:

  


  [h264 @ 0000015060d8f5c0] No start code is found.
    Last message repeated 1 times
[h264 @ 0000015060d8f5c0] non-existing PPS 0 referenced
    Last message repeated 1 times
[h264 @ 0000015060d8f5c0] decode_slice_header error
[h264 @ 0000015060d8f5c0] no frame!
[h264 @ 0000015060d8f5c0] non-existing PPS 0 referenced
    Last message repeated 1 times
[h264 @ 0000015060d8f5c0] decode_slice_header error
[h264 @ 0000015060d8f5c0] no frame!
[h264 @ 0000015060d8f5c0] non-existing PPS 0 referenced
    Last message repeated 1 times
# [...]
# this continues for a long time


  


  I have followed the other troubleshooting steps for encoding h264 into Matroska, but none of them seemed to have done the trick for me:

  


  

  • Setting AV_CODEC_FLAG_GLOBAL_HEADER: Invalid data when creating mkv container with h264 stream because extradata is null

  


  • Allocating some space for extradata: Initializing an output file for muxing mkv with FFmpeg

  


  


  This is my C code:

  


  #include &#xA;#include <libavutil></libavutil>opt.h>&#xA;#include <libavutil></libavutil>imgutils.h>&#xA;#include <libavcodec></libavcodec>avcodec.h>&#xA;#include <libavformat></libavformat>avformat.h>&#xA;&#xA;int main(void) {&#xA;    char *out_file_path = "./video.mkv";&#xA;    AVFormatContext *format_context;&#xA;    AVStream *video_stream;&#xA;    AVCodecContext *codec_context;&#xA;&#xA;    avformat_alloc_output_context2(&amp;format_context, NULL, NULL, out_file_path);&#xA;&#xA;    const AVCodec *codec = avcodec_find_encoder(AV_CODEC_ID_H264);&#xA;    video_stream = avformat_new_stream(format_context, NULL);&#xA;&#xA;    codec_context = avcodec_alloc_context3(codec);&#xA;    av_opt_set(codec_context->priv_data, "preset", "superfast", 0);&#xA;    av_opt_set(codec_context->priv_data, "crf", "22", 0);&#xA;&#xA;    codec_context->width = 1920;&#xA;    codec_context->height = 1080;&#xA;    codec_context->time_base = av_make_q(1, 30);&#xA;    codec_context->pix_fmt = AV_PIX_FMT_YUV420P;&#xA;&#xA;    if (strncmp("./video.mkv", out_file_path, 11) == 0) {&#xA;      printf("Writing .mkv...\n");&#xA;      codec_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;&#xA;      codec_context->extradata = (uint8_t*)av_mallocz(1024 * 1024);&#xA;      codec_context->extradata_size = 1024 * 1024;&#xA;    } else {&#xA;      printf("Writing .mp4...\n");&#xA;    }&#xA;&#xA;    // XXX avcodec_parameters_from_context is potentially superfluous (?)&#xA;    int ret = avcodec_parameters_from_context(video_stream->codecpar, codec_context);&#xA;&#xA;    ret = avcodec_open2(codec_context, codec, NULL);&#xA;&#xA;    avio_open(&amp;format_context->pb, out_file_path, AVIO_FLAG_WRITE);&#xA;&#xA;    ret = avformat_write_header(format_context, NULL);&#xA;&#xA;    // create a black input frame&#xA;    AVFrame *input_frame = av_frame_alloc();&#xA;    input_frame->width = 1920;&#xA;    input_frame->height = 1080;&#xA;    input_frame->format = AV_PIX_FMT_YUV420P;&#xA;    ret = av_image_alloc(input_frame->data, input_frame->linesize, input_frame->width, input_frame->height, input_frame->format, 32);&#xA;    ptrdiff_t linesize[4] = { input_frame->linesize[0], input_frame->linesize[1], input_frame->linesize[2], input_frame->linesize[3] };&#xA;    ret = av_image_fill_black(input_frame->data, linesize, input_frame->format, 0, 1920, 1080);&#xA;&#xA;    // write 2 seconds of video, all black&#xA;    for (size_t current_pts = 0; current_pts &lt; 60; current_pts&#x2B;&#x2B;) {&#xA;      input_frame->pts = av_rescale_q(current_pts, av_make_q(1, 30), codec_context->time_base);;&#xA;&#xA;      ret = avcodec_send_frame(codec_context, input_frame);&#xA;&#xA;      AVPacket* packet = av_packet_alloc();&#xA;&#xA;      while (1) {&#xA;          ret = avcodec_receive_packet(codec_context, packet);&#xA;          if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {&#xA;              break;&#xA;          } else if (ret &lt; 0) {&#xA;              printf("avcodec_receive_packet failed");&#xA;          } else {&#xA;              av_packet_rescale_ts(packet, codec_context->time_base, video_stream->time_base);&#xA;              ret = av_interleaved_write_frame(format_context, packet);&#xA;          }&#xA;      }&#xA;&#xA;      av_packet_free(&amp;packet);&#xA;    }&#xA;&#xA;    av_frame_free(&amp;input_frame);&#xA;&#xA;    // flush encoder&#xA;    avcodec_send_frame(codec_context, NULL);&#xA;    AVPacket *flush_packet = av_packet_alloc();&#xA;    while (avcodec_receive_packet(codec_context, flush_packet) != AVERROR_EOF) {&#xA;        //int ret = av_interleaved_write_frame(format_context_, packet);&#xA;        av_packet_rescale_ts(flush_packet, codec_context->time_base, video_stream->time_base);&#xA;        ret = av_write_frame(format_context, flush_packet);&#xA;    }&#xA;    av_packet_free(&amp;flush_packet);&#xA;&#xA;    ret = av_write_trailer(format_context);&#xA;    ret = avio_close(format_context->pb);&#xA;&#xA;    return 0;&#xA;}&#xA;

  


  The error handling is stripped out, but it does not raise any errors.

  


  This code works when I write into an mp4 file, but creates a corrupt file when writing into .mkv. You can change the output container format to mp4 by setting
char *out_file_path = "./video.mp4";

  


  You can compile this by running

  


  clang -I$(FFMPEG_DIR)/include -L$(FFMPEG_DIR)/lib -lavformat -lavcodec -lavutil main.c -o makemkv


  


  The output I’m getting while the above code is running:

  


  Writing .mkv...
[libx264 @ 0x139804c40] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x139804c40] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0x139804c40] 264 - core 164 r3108 31e19f9 - H.264/MPEG-4 AVC codec - Copyleft 2003-2023 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x3 me=dia subme=1 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 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=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=crf mbtree=0 crf=22.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 pb_ratio=1.30 aq=1:1.00


  


  When I use the ffmpeg CLI, I can create a working .mkv from my working .mp4 like this:

  


  ffmpeg -i video.mp4 -c:v copy created-with-ffmpeg-cli.mkv


  


  I have uploaded the resulting video files here: https://drive.google.com/drive/folders/1FS-0fBAwKBbO-tyxC0VrFqcCyyqd0BR_?usp=sharing

  


• ffmpeg with Quick Sync Video (qsv) gets stuck

  28 April 2023, by Juliano B. Nequirito

  I've compiled ffmpeg in an Arch Linux distribution with support to Intel Quick Sync Video. But ffmpeg gets stuck when I try to run it:

  


  $ ffmpeg -debug -hwaccel qsv -qsv_device /dev/dri/renderD128 -c:v h264_qsv -i test_video.mp4 -c:v hevc_qsv output.mp4

ffmpeg version N-109562-g0431f9805e Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.2.0 (GCC)
  configuration: --prefix=/usr --extra-cflags=-I/opt/cuda/include --extra-ldflags=-L/opt/cuda/lib64 --enable-lto --disable-rpath --enable-gpl --enable-version3 --enable-nonfree --enable-shared --disable-static --disable-stripping --enable-gray --enable-alsa --enable-avisynth --enable-bzlib --enable-chromaprint --enable-frei0r --enable-gcrypt --enable-gmp --enable-gnutls --enable-iconv --enable-ladspa --enable-lcms2 --enable-libaom --enable-libaribb24 --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcelt --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdavs2 --enable-libdc1394 --enable-libfdk-aac --enable-libflite --enable-fontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libiec61883 --enable-libilbc --enable-libjack --enable-libjxl --enable-libklvanc --enable-libkvazaar --enable-liblensfun --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-libopencv --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --disable-libopenvino --enable-libopus --enable-libplacebo --enable-libpulse --enable-librabbitmq --enable-librav1e --enable-librist --enable-librsvg --enable-librubberband --enable-librtmp --enable-libshine --enable-libsmbclient --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libsvthevc --enable-libsvtvp9 --disable-libtensorflow --enable-libtesseract --enable-libtheora --disable-libtls --enable-libtwolame --enable-libuavs3d --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxavs2 --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxcb-shape --enable-libxvid --enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-lzma --enable-decklink --disable-mbedtls --enable-libmysofa --enable-openal --enable-opencl --enable-opengl --disable-openssl --enable-pocketsphinx --enable-sndio --enable-sdl2 --enable-vapoursynth --enable-vulkan --enable-xlib --enable-zlib --enable-amf --enable-cuda-nvcc --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-libdrm --enable-libvpl --enable-libnpp --enable-nvdec --enable-nvenc --enable-omx --enable-rkmpp --enable-v4l2-m2m --enable-vaapi --enable-vdpau
  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
 matched as AVOption 'debug' with argument '-hwaccel'.
Reading option 'qsv' ... matched as output url.
Reading option '-qsv_device' ... matched as option 'qsv_device' (set QSV hardware device (DirectX adapter index, DRM path or X11 display name)) with argument '/dev/dri/renderD128'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'h264_qsv'.
Reading option '-i' ... matched as input url with argument 'test_video.mp4'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'hevc_qsv'.
Reading option 'output.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option qsv_device (set QSV hardware device (DirectX adapter index, DRM path or X11 display name)) with argument /dev/dri/renderD128.
[AVHWDeviceContext @ 0x5590d517ee40] libva: VA-API version 1.17.0
[AVHWDeviceContext @ 0x5590d517ee40] libva: User requested driver 'iHD'
[AVHWDeviceContext @ 0x5590d517ee40] libva: Trying to open /usr/lib/dri/iHD_drv_video.so
[AVHWDeviceContext @ 0x5590d517ee40] libva: Found init function __vaDriverInit_1_16
[AVHWDeviceContext @ 0x5590d517ee40] libva: va_openDriver() returns 0
[AVHWDeviceContext @ 0x5590d517ee40] Initialised VAAPI connection: version 1.17
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x41524742 -> bgra.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x42475241 -> argb.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x41424752 -> rgba.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x52474241 -> abgr.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x58524742 -> bgr0.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x42475258 -> 0rgb.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x58424752 -> rgb0.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x52474258 -> 0bgr.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30335241 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30334241 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30335258 -> x2rgb10le.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30334258 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x36314752 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x50424752 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x50524742 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x56555941 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30303859 -> gray.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x3231564e -> nv12.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x3132564e -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x32595559 -> yuyv422.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x59565955 -> uyvy422.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x32315659 -> yuv420p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30323449 -> yuv420p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x50313134 -> yuv411p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x48323234 -> yuv422p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x56323234 -> yuv440p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x50343434 -> yuv444p.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x33434d49 -> unknown.
[AVHWDeviceContext @ 0x5590d517ee40] Format 0x30313050 -> p010le.
[AVHWDeviceContext @ 0x5590d517ee40] VAAPI driver: Intel iHD driver for Intel(R) Gen Graphics - 22.6.4 ().
[AVHWDeviceContext @ 0x5590d517ee40] Driver not found in known nonstandard list, using standard behaviour.
[AVHWDeviceContext @ 0x5590d517e940] Use Intel(R) oneVPL to create MFX session, API version is 2.6, the required implementation version is 1.3


  


  CPU starts being used intensively and then nothing happens.
Does anybody have any clue on it?

  


  I have an Intel i7-8550U (8th gen Kaby Lake) processor with 4 cores (8 threads).

  


  I have also used these options to ffmpeg, getting the same results:

  


  ffmpeg -loglevel debug -init_hw_device qsv=hw -filter_hw_device hw -hwaccel qsv -hwaccel_output_format qsv -i test_video.mp4 -vf 'format=qsv,hwupload=extra_hw_frames=64' -c:v hevc_qsv -f mp4 output.mp4


  


  With VAAPI, transcoding runs flowlessly:

  


  ffmpeg -init_hw_device vaapi=intel:/dev/dri/renderD128 -hwaccel vaapi -hwaccel_output_format vaapi -hwaccel_device intel -filter_hw_device intel -i test_video.mp4 -c:v hevc_vaapi -f mp4 output.mp4