Recherche avancée

Sur d’autres sites (9388)

• Including FFmpeg.framework Into My IOS App

  28 mars, par Alpi

  I'm trying to manually integrate ffmpegkit.framework into my Expo Bare Workflow iOS app (built with React Native + native modules via Xcode) because the ffmpegkit will be deprecated and the binaries will be deleted.

  


  So far

  


  

  • I've downloaded the latest LTS release of FFmpegkit from here.

  


  • I've created 3 files : FFmpegModule.m , FFmpegModule.swift and SoundBud-Bridging-Header.

  


  • Added the frameworks to my projectDir/ios manually, which shows in my XCode under projectDir/Frameworks

  


  • Added all the frameworks into "Frameworks, Libraries and Embedded Content" and make them "Embed and Sign"

  


  • As Framework Search Path in Project Settings, I've set it to "$(PROJECT_DIR)" and recursive

  


  • In "Build Phases" I've added all the frameworks under "Embed Frameworks",set the destination to "Frameworks" and checked "Code Sign on Copy" to all of them and unchecked "Copy Only When Installing"

  


  • Also under "Link Binary With Libraries" I've added all the frameworks and marked them "Required"

  


  


  Here are the errors I'm getting :

  


  

  • The framework is not recognized by Swift (No such module 'ffmpegkit')

  


  • A build cycle error : Cycle inside SoundBud ; building could produce unreliable results.
Target 'SoundBud' has copy command from '.../Frameworks/ffmpegkit.framework' ...

  


  


  Below you can see my swift file and the ffmpegkit module file :
Swift :

  


  import Foundation
import ffmpegkit
import React

@objc(FFmpegModule)
class FFmpegModule: NSObject, RCTBridgeModule {

static func moduleName() -> String {
return "FFmpegModule"
}

@objc
func runCommand(_ command: String, resolver resolve: @escaping RCTPromiseResolveBlock, 
rejecter reject: @escaping RCTPromiseRejectBlock) {
FFmpegKit.executeAsync(command) { session in
  let returnCode = session?.getReturnCode()
  resolve(returnCode?.getValue())
}
}

@objc
static func requiresMainQueueSetup() -> Bool {
return false
}
}


  


  and the module :

  


  framework module ffmpegkit {

header "AbstractSession.h"
header "ArchDetect.h"
header "AtomicLong.h"
header "Chapter.h"
header "FFmpegKit.h"
header "FFmpegKitConfig.h"
header "FFmpegSession.h"
header "FFmpegSessionCompleteCallback.h"
header "FFprobeKit.h"
header "FFprobeSession.h"
header "FFprobeSessionCompleteCallback.h"
header "Level.h"
header "Log.h"
header "LogCallback.h"
header "LogRedirectionStrategy.h"
header "MediaInformation.h"
header "MediaInformationJsonParser.h"
header "MediaInformationSession.h"
header "MediaInformationSessionCompleteCallback.h"
header "Packages.h"
header "ReturnCode.h"
header "Session.h"
header "SessionState.h"
header "Statistics.h"
header "StatisticsCallback.h"
header "StreamInformation.h"
header "ffmpegkit_exception.h"

export *
}


  


  I can provide you with more info if you need it. I've been trying non stop for 7 days and it's driving me crazy. I would appreciate any help greatly

  


• Diamond Rio Artifacts

  30 août 2012, par Multimedia Mike — Multimedia History

  Remember the Diamond Rio PMP300 ? It’s credited with being the very first portable MP3 player, released all the way back in 1998 (I say ‘credited’ because I visited an audio museum once which exhibited a Toshiba MP3 player from 1997). I recently rescued a pristine set of Rio artifacts from a recycle pile.

  
  
  

  I wondered if I should scan the manual for posterity. However, a Google search indicates that a proper PDF (loaded with pleas to not illegally copy music) isn’t very difficult to come by. Here are the other items that came with the unit :

  
  
  Click for larger image
  

  Ah, more memories (of dialup internet) : A tie-in with another Diamond product, this time a modem which claims to enable the user to download songs at up to 112 kilobits per second. I wonder if that was really possible. I remember that 56k modems were a stretch and 33.6k was the best that most users could hope for.

  There is also a separate piece of paper that advises the buyer that the parallel port adapter might look a bit different than what is seen in the printed copy. Imagine the age of downloading to your MP3 player via parallel port while pulling down new songs via dialup internet.

  The artifacts also included not one, but two CD-ROMs :

  
  
  Click for larger image
  

  One is a driver and software disc, so no big surprise there. The other has a selection of MP3 files for your shiny new MP3 player. I’m wondering if these should be proactively preserved. I was going to process the files’ metadata and publish it here, for the benefit of search engines. However, while metadata is present, the files don’t conform to any metadata format that FFmpeg/Libav recognize. The files mention Brava Software Inc. in their metadata sections. Still, individual filenames at the end of this post.

  Leftovers :
  A few other miscellaneous multimedia acquisitions :

  
  
  

  I still want to study all of these old multimedia creation programs in depth some day. Theatrix Hollywood is a creative writing game, Wikipedia alleges (I’m a bit rigid with my exact definition of what constitutes a game). Here is an example movie output from this software. Meanwhile, the Mad Dog Multimedia CD-ROM apparently came packaged with a 56X CD-ROM drive (roughly the pinnacle of CD-ROM speeds). I found it has some version of Sonic Foundry’s ACID software, thus making good on the “applications” claim on the CD-ROM copy.

  Diamond Rio MP3 Sampler
  These are the names of the MP3 files found on the Diamond Rio MP3 sampler for the benefit of search engines.

  13_days.mp3
  albert_einstein_dreams.mp3
  a_man_of_many_colours.mp3
  anything_for_love.mp3
  a_secret_place.mp3
  bake_sale.mp3
  bigger_than_the_both_of_us.mp3
  boogie_beat.mp3
  bring_it_on.mp3
  buskersoundcheck_hippo.mp3
  charm.mp3
  chemical_disturbance.mp3
  coastin.mp3
  credit_is_due.mp3
  dance_again.mp3
  destiny.mp3
  dig_a_little_deeper.mp3
  diplomat6_bigmouthshut.mp3
  dirty_littlemonster.mp3
  dirty.mp3
  drivin.mp3
  Eric_Clapton_Last_Train.mp3
  etude_in_c_sharp_minor_op_42_n.mp3
  everybody_here.mp3
  freedom_4_all.mp3
  grandpas_advice.mp3
  groove.mp3
  heartland.mp3
  he_loved_her_so.mp3
  highway_to_hell.mp3
  hit_the_ground_runnin.mp3
  i_feel_fine_today.mp3
  im_not_lost_im_exploring.mp3
  into_the_void.mp3
  its_alright.mp3
  i_will_be_there.mp3
  i_will_pass_this_way_again.mp3
  juiceboxwilly_hepcat.mp3
  just_an_illusion.mp3
  keepin_time_by_the_river.mp3
  king_of_the_brooklyn_delta.mp3
  lovermilou_ringingbell.mp3
  middle_aged_rock_and_rollers.mp3
  midnight_high.mp3
  mr_schwinn.mp3
  my_brilliant_masterpiece.mp3
  my_gallery.mp3
  on_the_river_road.mp3
  pouring_rain.mp3
  prayer.mp3
  rats_in_my_bedroom.mp3
  razor_serpent_and_the_dub_mix.mp3
  ruthbuzzy_pleasestophangin.mp3
  secret_love.mp3
  ships.mp3
  silence_the_thunder.mp3
  sleeping_beauty.mp3
  slow_burn.mp3
  standing_in_my_own_way.mp3
  take_no_prisoners.mp3
  takin_up_space.mp3
  Taylor_Dayne_Unstoppable.mp3
  the_laundromat_song.mp3
  the_old_dun_cow.mp3
  the_people_i_meet.mp3
  trip_trigger_avenue.mp3
  tru-luv.mp3
  unfortunate_man.mp3
  vertigo.mp3
  when_she_runs.mp3
  where_do_we_go_from_here.mp3
  words_of_earnest.mp3
  

• Dynamic ffmpeg crop, scale & encoding code seems to break when the crop size changes

  28 avril 2024, par Blindy

  The following code works perfectly as long as I only move the crop rectangle, however as soon as I change its size I no longer get frames out of my filter (av_buffersink_get_frame returns -11). It's crazy, even after the size changes, if it eventually changes to the original size that frame will go through, then it will go back to no longer providing frames.

  


  Would anyone happen to know what I'm doing wrong ?

  


  My filter setup (note the crop & scale combination, it should (I think ?) scale whatever I crop to the output video size) :

  


  // buffer source -> buffer sink setup
auto args = std::format("video_size={}x{}:pix_fmt={}:time_base={}/{}:pixel_aspect={}/{}",
    inputCodecContext->width, inputCodecContext->height, (int)inputCodecContext->pix_fmt,
    inputCodecContext->pkt_timebase.num, inputCodecContext->pkt_timebase.den,
    inputCodecContext->sample_aspect_ratio.num, inputCodecContext->sample_aspect_ratio.den);

AVFilterContext* buffersrc_ctx = nullptr, * buffersink_ctx = nullptr;
check_av_result(avfilter_graph_create_filter(&buffersrc_ctx, bufferSource, "in",
    args.c_str(), nullptr, &*filterGraph));
check_av_result(avfilter_graph_create_filter(&buffersink_ctx, bufferSink, "out",
    nullptr, nullptr, &*filterGraph));
check_av_result(av_opt_set_bin(buffersink_ctx, "pix_fmts",
    (uint8_t*)&outputCodecContext->pix_fmt, sizeof(outputCodecContext->pix_fmt), AV_OPT_SEARCH_CHILDREN));

// filter command setup
auto filterSpec = std::format("crop,scale={}:{},setsar=1:1", outputCodecContext->width, outputCodecContext->height);

check_av_result(avfilter_graph_parse_ptr(&*filterGraph, filterSpec.c_str(), &filterInputs, &filterOutputs, nullptr));
check_av_result(avfilter_graph_config(&*filterGraph, nullptr));


  


  Frame cropping :

  


  check_av_result(avfilter_graph_send_command(&*filterGraph, "crop", "x", std::to_string(cropRectangle.CenterX() - cropRectangle.Width() / 2).c_str(), nullptr, 0, 0));
check_av_result(avfilter_graph_send_command(&*filterGraph, "crop", "y", std::to_string(cropRectangle.CenterY() - cropRectangle.Height() / 2).c_str(), nullptr, 0, 0));
check_av_result(avfilter_graph_send_command(&*filterGraph, "crop", "w", std::to_string(cropRectangle.Width()).c_str(), nullptr, 0, 0));
check_av_result(avfilter_graph_send_command(&*filterGraph, "crop", "h", std::to_string(cropRectangle.Height()).c_str(), nullptr, 0, 0));

// push the decoded frame into the filter graph
check_av_result(av_buffersrc_add_frame_flags(buffersrc_ctx, &*inputFrame, 0));

// pull filtered frames from the filter graph
while (1)
{
    ret = av_buffersink_get_frame(buffersink_ctx, &*filteredFrame);
    if (ret < 0)
    {
        // if no more frames, rewrite the code to 0 to show it as normal completion
        if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
            ret = 0;
        break;
    }

    // write the filtered frame to the output file 
    // [...]
}


  


  I also set the output video size before creating the file, and it is obeyed as expected :

  


  outputCodecContext->width = (int)output.PixelSize().Width;
outputCodecContext->height = (int)output.PixelSize().Height;