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Sur d’autres sites (8898)

  • Use SDL2 play yuv file but actually no display [closed]

    14 juin 2024, par guan xi

    I use ffmpeg to demux and decode the media file, and then use SDL2 to play the raw data, everything is ok. no error no warning, but SDL2 windows does not dispaly video content.
All i know is frame dts is ordered in SDL2 play queue and data is good.

    


    void VideoPlay::play_video() {
  while (is_running_) {
    refresh_loop_wait_event(&event_);

    switch (event_.type) {
      case SDL_KEYDOWN:
        if (event_.key.keysym.sym == SDLK_q) {
          LOG_INFO("Q quit");
          is_running_ = false;
          frame_queue_->abort();
        }
        break;
      case SDL_QUIT:
        LOG_INFO("SDL_QUIT");
        is_running_ = false;
        frame_queue_->abort();
        break;

      default:
        break;
    }
  }
}

void VideoPlay::refresh_loop_wait_event(SDL_Event *event) {
  SDL_PumpEvents();

  while (
      !SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT)) {
    video_refresh();
    SDL_PumpEvents();
  }
}

void VideoPlay::video_refresh() {
  int ret = 0;
  frame_queue_->pop(frame_);
  if (!frame_) {
    LOG_ERROR("frame_queue_ pop failed.");
    is_running_ = false;
    frame_queue_->abort();
    return;
  }

  rect_.x = 0;
  rect_.y = 0;
  rect_.w = video_width_;
  rect_.h = video_height_;

  ret = SDL_UpdateYUVTexture(
      texture_, &rect_, frame_->data[0], frame_->linesize[0], frame_->data[1],
      frame_->linesize[1], frame_->data[2], frame_->linesize[2]);

  LOG_DEBUG("frame pts: %ld, tot size: %d, Y size: %d, U size: %d, V size: %d",
            frame_->pts, video_width_ * video_height_, frame_->linesize[0],
            frame_->linesize[1], frame_->linesize[2]);
  if (ret != 0) {
    LOG_ERROR("SDL_UpdateYUVTexture failed. %s", SDL_GetError());
    is_running_ = false;
    frame_queue_->abort();
    return;
  }
  ret = SDL_RenderClear(renderer_);
  if (ret != 0) {
    LOG_ERROR("SDL_RenderClear failed. %s", SDL_GetError());
    is_running_ = false;
    frame_queue_->abort();
    return;
  }
  ret = SDL_RenderCopy(renderer_, texture_, nullptr, &rect_);
  if (ret != 0) {
    LOG_ERROR("SDL_RenderCopy failed. %s", SDL_GetError());
    is_running_ = false;
    frame_queue_->abort();
    return;
  }
  SDL_RenderPresent(renderer_);
  SDL_Delay(10);
  av_frame_free(&frame_);
  frame_ = nullptr;
}


    


    log file out put

    


    ~/A_CODES/ffmpeg_official/cmake-build-debug ᐅ cat sdlplay.log
[info]  [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/core/sp_demux.cpp:50  init] audio idx 1 video idx 0
[info]  [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/core/sp_decode.cpp:39  init] codec: h264
[info]  [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/core/sp_decode.cpp:68  init] yuv fmt: yuv420p
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x1100
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x1100
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x200
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x200
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x200
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x200
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x200
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x300
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x300
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x301
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:100  play_video] event 0x200
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 67, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 133, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 200, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 267, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 333, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 400, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 467, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 533, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 600, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 667, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 733, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 800, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 867, tot size: 82944, Y size: 384, U size: 192, V size: 192
[debug] [2024-06-14 15:39:33] [/home/xiguan/A_CODES/ffmpeg_official/SDLPlayer/sdl/video_play.cpp:151  video_refresh] frame pts: 933, tot size: 82944, Y size: 384, U size: 192, V size: 192


    


    I try to handle SDL2 events correctly as ffplay but no use.
I also gdb to search anything error but nothing happen too.

    


  • Yet another ffmpeg concat audio sync issue [closed]

    15 mars 2024, par Demiurg

    I've read through dozens of posts, tried many suggestions, nothing seems to work for me. The funny part is that the video is fine in some players (e.g. Quicktime) but not the others (e.g. Chrome).

    


    This is what I currently use :

    


    ffmpeg -i segment.mp4 -q 0 -c copy segment.ts
ffmpeg -f concat -i videos.txt -c copy -y final.mp4


    


    This is what ffmpeg shows for the originals

    


    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '52M35S_1710280355.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isom
    creation_time   : 2024-03-12T21:53:35.000000Z
  Duration: 00:00:59.86, start: 0.000000, bitrate: 851 kb/s
  Stream #0:0[0x1](und): Audio: opus (Opus / 0x7375704F), 48000 Hz, mono, fltp, 10 kb/s (default)
    Metadata:
      creation_time   : 2024-03-12T21:53:35.000000Z
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Video: hevc (Main) (hvc1 / 0x31637668), yuvj420p(pc, bt709), 1920x1080, 836 kb/s, 10.02 fps, 10 tbr, 90k tbn (default)
    Metadata:
      creation_time   : 2024-03-12T21:53:35.000000Z
      vendor_id       : [0][0][0][0]


    


  • washed out colors when converting h264 into vp9 using ffmpeg [closed]

    31 juillet 2024, par apes-together-strong

    I'm trying to convert an h264 video to vp9/opus webm.
Every attempt so far has had washed out colors.
Is there a fix for this issue or is it just the way h264->vp9 conversion is ?

    


    ffprobe of the source file :

    


    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test1.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2024-07-30T17:03:10.000000Z
    com.android.version: 10
  Duration: 00:01:04.07, start: 0.000000, bitrate: 20198 kb/s
  Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt470bg/bt470bg/smpte170m, progressive), 1920x1080, 20001 kb/s, SAR 1:1 DAR 16:9, 30 fps, 30 tbr, 90k tbn (default)
    Metadata:
      creation_time   : 2024-07-30T17:03:10.000000Z
      handler_name    : VideoHandle
      vendor_id       : [0][0][0][0]
    Side data:
      displaymatrix: rotation of -90.00 degrees
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default)
    Metadata:
      creation_time   : 2024-07-30T17:03:10.000000Z
      handler_name    : SoundHandle
      vendor_id       : [0][0][0][0]


    


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