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• when I filter a frame with "fps=fps=30" my code starts consuming a lot of ram until it crashes, but if I use "scale=250:250" it works fine

  23 août 2021, par Gabriel Ayala

  When I apply the filter "scale=250:250" my code works, it outputs a rescalated video
but when I apply the filter "fps=fps=30000/1000", the code asks for ram until it crashes, I think the problem is in the applyFilter function
PasteBin of complete code https://pastebin.com/tcgwFmTz this part starts at line 257

  


  int applyFilter(filterCtx* filter, AVFrame* inFrame, AVFrame* outFrame)
{
    int ret;
    /* push the decoded frame into the filtergraph */
    if (av_buffersrc_add_frame_flags(filter->buffersrc_ctx, inFrame, AV_BUFFERSRC_FLAG_KEEP_REF) < 0)
    {
        return 0;
    }

    /* pull filtered frames from the filtergraph */
    for (EVER)
    {
        ret = av_buffersink_get_frame(filter->buffersink_ctx, outFrame);
        if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
        {
            return 3;
        }
        if (ret < 0)
        {
            return -1;
        }
        return 0;
    }
    return 0;
}


  


      char filterDesc = "fps=fps=30000/1000"; // THIS DOESN'T WORK
    //char filterDesc = "scale=1200:1200"; THIS WORKS
    filter = initFilter(filterDesc, params);
    
    for (EVER)
    {
        getFrame(decoder, frame, packet);
        if(decoder->container->streams[packet->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
        {
            if (filter != NULL)
            {
                response = applyFilter(filter, frame, filterFrame);
                if (response < 0)
                {
                    printf("Error while applying a filter");
                    return -1;
                }
                tmp = frame;
                av_frame_unref(frame);
                frame = filterFrame;
                filterFrame = tmp;
                if(response == 3)
                {
                    continue;
                }
            }
            
        }
        encode(decoder, encoder, frame, packet->stream_index);

    }


  


• Output a video with "slide up" transition using more than 100 images in FFMPEG ?

  9 juillet 2021, par Joseph Ladera Fugata

  I have more than a hundred images of the same size and format that my company wants to display at the big 9:16 (rotated 16:9) screen outside the front gate. It's supposed to be easy but they required me to have it slide from top to bottom, meaning that it should look like a smooth auto scroll effects. I searched here and there but no luck.

  


  I have tried xfade like this :

  


  ffmpeg -loop 1 -i input.txt -filter_complex
"xfade=transition=slideup:duration=10:offset=0,format=yuv420p" output.mp4


  


  It didn't do anything just a bunch of error referring to the inputs. Which is supposed to be just 2 images in the first place.

  


  The next thing I tried was using Concat from someone named @Gyan at his reply HERE and here's my version of the code :

  


  ffmpeg -y -f concat -safe 0 -i input.txt
-vf tile=1x%img_count%,loop=%_my_loop_count_var%:1:0,
crop=iw:ih/%img_count%:0:clip((t-%_start_time%)/%sec_per_img%*ih/%img_count%\,0\,ih*%img_count_minus_one%/%img_count%)
-r 25 -c:v libx264 -preset ultrafast output.mp4


  


  When I played with it, it gives a different output even do the image are all the same dimensions.

  


  I found someone on youtube used this but it is using bash and I am on windows. Unless someone here can convert it to a batch script would be great. I look into it and it seems like he's just V-stacking them kinda like what I did but there's more. I know I could have gone through win bash but I doubt the script will run on a non-Unix environment just by having bash, and I'm not yet familiar with Cygwin either.

  


  I also did tried other options posted by others here, I just forgot to bookmark them, but non of them works on more than a hundred images.

  


  I love to hear a response if anyone can help.

  


• "connection reset by peer" error when streaming from ffmpeg to ffserver

  7 juillet 2021, par g Kishore

  I'm trying to stream a static video file using ffmpeg to ffserver in androidv7.1.2 embedded board.

  


  

  1. Started ffserver with command "ffserver -d /etc/ffserver.conf &"

  


  2. ffmpeg command used to stream :
ffmpeg -i ./sample_960x400_ocean_with_audio.3gp -f flv http://192.168.47.174:8090/feed1.ffm

  


  


  ffserver.conf file content

  


  HTTPPort 8090&#xA;HTTPBindAddress 192.168.47.174&#xA;MaxHTTPConnections 2000&#xA;MaxClients 1000&#xA;MaxBandwidth 100000&#xA;&#xA;#NoDaemon&#xA;#UseDefaults&#xA;#NoDefaults&#xA;&#xA;<feed>&#xA;File /data/local/tmp/feed1.ffm&#xA;FileMaxSize 5M&#xA;</feed>&#xA;&#xA;<stream>&#xA;Feed feed1.ffm&#xA;Format flv&#xA;&#xA;VideoCodec libx264&#xA;VideoFrameRate 24&#xA;VideoBufferSize 80000&#xA;VideoBitRate 512&#xA;VideoQMin 1&#xA;VideoQMax 5&#xA;VideoSize 960x418&#xA;PreRoll 0&#xA;Noaudio&#xA;</stream>&#xA;

  


  Error :

  


  Thu Jan  1 00:20:04 2015 192.168.47.174 - - [POST] "/feed1.ffm HTTP/1.1" 200 415
av_interleaved_write_frame(): Connection reset by peer
    Last message repeated 1 times
[flv @ 0x41be1d40] Failed to update header with correct duration.
[flv @ 0x41be1d40] Failed to update header with correct filesize.
Error writing trailer of http://192.168.47.174:8090/feed1.ffm: Connection reset by peer
frame=    1 fps=0.0 q=1.6 Lsize=       0kB time=00:00:00.09 bitrate=  33.0kbits/s speed=1.68x    
video:10kB audio:2kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Conversion failed!


  


  Any help is greatly appreciated.