Recherche avancée

Sur d’autres sites (8002)

• vulkan_h264 : reject end_frame being called without valid session parameters

  20 mai 2023, par Lynne

  vulkan_h264 : reject end_frame being called without valid session parameters
  When seeking through MBAFF-coded H264, this can happen. Decoding calls end_frame
  
  without calling start_frame. We are unable to decode this, as no frame
  
  state has been set.
  Happens for both VAAPI and Vulkan. Could be an issue elsewhere, hence
  
  the individual commit.
  

  • [DH] libavcodec/vulkan_h264.c

• AccessViolationException in ffmpeg (called from .NET with FFmpeg.AutoGen)

  13 septembre 2022, par zgabi

  I'm trying to "download"/stream an RTSP stream with FFmpeg.Autogen. I receive an AccessViolationException before the actual stream begins.

  


  I tried multiple FFmpeg and FFmpeg.AutoGen version (for example the latest stable FFMpeg version 5.1.1 from gyan.dev site and the latest FFmpeg.Autogen : 5.1.1). I also tried version 4.x (of course both ffmpeg and FFmpeg.AutoGen)

  


  This code works with a lot of Hikvision camera streams, I get the Access Violation with an expensive InfiRay thermal camera. (But anyway if it sends some corrupt data, ffmpeg should not crash.)

  


  My code is (this is only the initialization, since the problem occures there) :

  


  av_log_set_level(AV_LOG_DEBUG);

AVFormatContext* cf = null;

try
{
    cf = avformat_alloc_context();
    if (cf == null)
    {
        throw new Exception("Could not allocate the format context");
    }

    int probeSize = 32768 * 2;
    cf->probesize = probeSize;

    AVDictionary* options = null;
    string probeSizeStr = probeSize.ToString();
    av_dict_set(&options, "analyzeduration", probeSizeStr, 0);
    av_dict_set(&options, "probesize", probeSizeStr, 0);
    av_dict_set(&options, "rtsp_transport", "tcp", 0);

    string url =
        "rtsp://horizontetest:horizontetest@122.5.39.146:7828/cam/realmonitor?channel=1&subtype=1&unicast=true&proto=Onvif";
    int ret = avformat_open_input(&cf, url, null, &options);
    if (ret != 0)
    {
        throw new Exception("Could not open the input");
    }

    ret = avformat_find_stream_info(cf, &options);
    Console.WriteLine(probeSizeStr);
    if (ret < 0)
    {
        throw new Exception("Could not find stream info");
    }

    if (cf->streams == null)
    {
        throw new Exception("Could not find stream");
    }
}
finally
{
    if (cf != null)
    {
        avformat_close_input(&cf);
    }
}


  


  Access Violation occures in the avformat_find_stream_info call.

  


• FFmpeg error parsing stats_file option when called from Python

  12 août 2022, par user3311005

  I can run this command on the CMD console :

  


  ffmpeg -i image_output\cbar_240_rec.bmp -i test_images\cbar_240.bmp -lavfi psnr=stats_file=cbar_240_rec_psnr.csv -f null -


  


  Running this command from Python is giving me an error.

  


    cmd = f'ffmpeg -i image_output\cbar_240_rec.bmp -i test_images\cbar_240.bmp -lavfi psnr=stats_file=test_images\cbar_240_rec.csv -f null -'
  retcode = subprocess.call( cmd, shell=True )


  


  Gives me an error parsing the stats_file. Here's the last part of the print output.

  


  [psnr @ 000001ca992e90c0] Unable to parse option value "extronbuildsburbank_pure3_adam_dev_4381simrivieraimage_outputcbar_240_rec.csv"
[psnr @ 000001ca992e90c0] [Eval @ 000000825e9febc0] Undefined constant or missing '(' in 'extronbuildsburbank_pure3_adam_dev_4381simrivieraimage_outputcbar_240_rec.csv'
[psnr @ 000001ca992e90c0] Unable to parse option value "extronbuildsburbank_pure3_adam_dev_4381simrivieraimage_outputcbar_240_rec.csv"
[psnr @ 000001ca992e90c0] Error setting option stats_version to value extronbuildsburbank_pure3_adam_dev_4381simrivieraimage_outputcbar_240_rec.csv.
[Parsed_psnr_0 @ 000001ca992e8fc0] Error applying options to the filter.
[AVFilterGraph @ 000001ca98dcde80] Error initializing filter 'psnr' with args 'stats_file=C:extronbuildsburbank_pure3_adam_dev_4381simrivieraimage_outputcbar_240_rec.csv'
Error initializing complex filters.
Invalid argument