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• Pass individual frames as BGRA byte array and set the timestamps via pipe to FFmpeg

  30 juillet 2023, par Nicke Manarin

  I have a set of images (as BGRA byte[]) with their respective timestamps in milliseconds and I want to pass it to FFmpeg to build an animation.

  


  I'm using FFmpeg v6 right now and in this example I'm expecting a GIF as output, but I'm going to export to multiple formats later.

  


  var arguments = "-vsync passthrough  
-f rawvideo 
-pix_fmt bgra 
-video_size {width}x{height} 
-i -  
-loop 0 
-lavfi palettegen=stats_mode=diff[pal],[0:v][pal]paletteuse=new=1:dither=sierra2_4a:diff_mode=rectangle 
-f gif 
-y \"C:\Users\User\Desktop\test.gif\"";

var process = new Process
{
    StartInfo = new ProcessStartInfo
    {
        FileName = "./ffmpeg.exe",
        Arguments = arguments.Replace("{width}", width.ToString()).Replace("{height}", height.ToString()),
        RedirectStandardInput = true,
        RedirectStandardOutput = true,
        UseShellExecute = false,
        CreateNoWindow = true
    }
};

_process.Start();



  


  Then on my render loop, I'm trying to send the frames and their timestamps one by one.

  


  public void EncodeFrame(IntPtr bufferAddress, int bufferStride, int width, int height, int index, long timestamp, int delay)
{
    var frameSize = height * bufferStride;
    var frameBytes = new byte[frameSize];
    System.Runtime.InteropServices.Marshal.Copy(bufferAddress, frameBytes, 0, frameSize);

    _process.StandardInput.BaseStream.Write(frameBytes, 0, frameSize);
    _process.StandardInput.BaseStream.Write(_delimiter, 0, _delimiter.Length);
    _process.StandardInput.BaseStream.Write(BitConverter.GetBytes(timestamp), 0, sizeof(long));
}


  


  The issue is that I'm getting an IOException (The pipe has been ended), so probably I'm not sending the frames correctly (not sending the delimiter and timestamp doesn't help).

  


  Is this even possible ?

  


• fftools/ffmpeg_enc : apply -top to individual encoded frames

  14 septembre 2023, par Anton Khirnov

  fftools/ffmpeg_enc : apply -top to individual encoded frames
  Fixes #9339.
  

  • [DH] fftools/ffmpeg_enc.c
  • [DH] tests/ref/fate/concat-demuxer-extended-lavf-mxf_d10
  • [DH] tests/ref/fate/concat-demuxer-simple1-lavf-mxf_d10
  • [DH] tests/ref/lavf/mxf_d10

• The RTSP stream provided by my camera is parsed properly by ffmpeg on windows but on Linux it shows：Invalid data found when processing input ? [closed]

  9 novembre 2023, par LvWei

  The RTSP stream provided by my camera is parsed properly by ffmpeg on windows but on Linux it shows：Invalid data found when processing input ?

  


  The execution logs for ffmpeg for both operating systems are as follows：

  


  Linux :

  


  Opening an input file: rtsp://admin:12345678wjc@10.11.12.143:8960/h264/ch1/sub/av_stream.
Probing rtsp score:100 size:0
[tcp @ 0x64c8480] No default whitelist set
[tcp @ 0x64c8480] Original list of addresses:
[tcp @ 0x64c8480] Address 10.11.12.143 port 8960
[tcp @ 0x64c8480] Interleaved list of addresses:
[tcp @ 0x64c8480] Address 10.11.12.143 port 8960
[tcp @ 0x64c8480] Starting connection attempt to 10.11.12.143 port 8960
[tcp @ 0x64c8480] Successfully connected to 10.11.12.143 port 8960
[rtsp @ 0x64c5840] Sending:
OPTIONS rtsp://10.11.12.143:8960/h264/ch1/sub/av_stream RTSP/1.0
CSeq: 1
User-Agent: Lavf60.3.100

--
[rtsp @ 0x64c5840] ret=-104 c=00 [rtsp://admin:password@10.11.12.143:8960/h264/ch1/sub/av_stream: Invalid data found when processing input


  


  Windows :

  


  [tcp @ 000001c07a8ddd00] No default whitelist set
[tcp @ 000001c07a8ddd00] Original list of addresses:
[tcp @ 000001c07a8ddd00] Address 10.11.12.143 port 8960
[tcp @ 000001c07a8ddd00] Interleaved list of addresses:
[tcp @ 000001c07a8ddd00] Address 10.11.12.143 port 8960
[tcp @ 000001c07a8ddd00] Starting connection attempt to 10.11.12.143 port 8960
[tcp @ 000001c07a8ddd00] Successfully connected to 10.11.12.143 port 8960
[rtsp @ 000001c07a8da480] Sending:
OPTIONS rtsp://10.11.12.143:8960/h264/ch1/sub/av_stream RTSP/1.0
CSeq: 1
User-Agent: Lavf60.15.100

--
[rtsp @ 000001c07a8da480] ret=1 c=52 [R]
[rtsp @ 000001c07a8da480] ret=1 c=54 [T]
[rtsp @ 000001c07a8da480] ret=1 c=53 [S]
[rtsp @ 000001c07a8da480] ret=1 c=50 [P]
[rtsp @ 000001c07a8da480] ret=1 c=2f [/]
[rtsp @ 000001c07a8da480] ret=1 c=31 [1]
[rtsp @ 000001c07a8da480] ret=1 c=2e [.]
[rtsp @ 000001c07a8da480] ret=1 c=30 [0]
[rtsp @ 000001c07a8da480] ret=1 c=20 [ ]
[rtsp @ 000001c07a8da480] ret=1 c=32 [2]
[rtsp @ 000001c07a8da480] ret=1 c=30 [0]
    Last message repeated 1 times
[rtsp @ 000001c07a8da480] ret=1 c=20 [ ]
[rtsp @ 000001c07a8da480] ret=1 c=4f [O]
[rtsp @ 000001c07a8da480] ret=1 c=4b [K]
[rtsp @ 000001c07a8da480] ret=1 c=0d [
]
[rtsp @ 000001c07a8da480] ret=1 c=0a [
]
[rtsp @ 000001c07a8da480] line='RTSP/1.0 200 OK'


  


  windows下完整执行日志链接：
https://cowtransfer.com/s/b69b55e743c244 点击链接查看 [ windows_log.txt ] ，或访问奶牛快传 cowtransfer.com 输入传输口令 bsp0fk 查看；

  


  Why is this happening ? What causes parsing failures on linux systems ?感谢各位大佬！！！