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  • When generating a video from images and adding audio the video isn't playable

    1er août 2017, par randommman

    So I have a bunch of images in a folder, with the following structure :

    image-0.png
    
image-1.png
    
image-2.png

    Sometimes the folder can have just 1 image which will be saved as :

    image-0.png

    My code to generate the video and to add the audio

    // create the file
    
using (WaveFileReader wf = new WaveFileReader(Audio))
    
{
    
    // the files
    
    OldVideo = "old.avi";
    
    NewVideo = "video.avi";
    
    Audio = "sound.wav";
    

    
    // Get the time of the audio and divide by images
    
    time = wf.TotalTime.TotalSeconds;
    
    mimtime = time / imagescount;
    

    
    ffmpegPath = "ffmpeg.exe";
    
    ffmpegParams = " -r 1/" + mimtime + " -i " + ImagesFolder + "image-%d.png -t " + time + " -y -vf scale=1280:-2 " + OldVideo;
    
    ffmaudioParams = " -i " + OldVideo + " -i " + Audio + " -c copy -shortest " + NewVideo;
    
}
    

    

    
using (Process ffmpeg = new Process())
    
{
    
    //Generate video
    
    ffmpegstartInfo = new ProcessStartInfo();
    
    ffmpegstartInfo.FileName = ffmpegPath;
    
    ffmpegstartInfo.Arguments = ffmpegParams;
    
    ffmpegstartInfo.RedirectStandardOutput = true;
    
    ffmpegstartInfo.RedirectStandardError = true;
    
    ffmpegstartInfo.UseShellExecute = false;
    
    ffmpegstartInfo.CreateNoWindow = true;
    

    
    ffmpeg.StartInfo.FileName = ffmpegPath;
    
    ffmpeg.StartInfo.Arguments = ffmpegParams;
    
    ffmpeg.StartInfo = ffmpegstartInfo;
    
    ffmpeg.Start();
    
    ffmpeg.WaitForExit(30000);
    

    

    
    /*ffmpeg.StartInfo.FileName = "cmd.exe";
    
    ffmpeg.StartInfo.Arguments = "/k " + ffmpegPath + " " + ffmpegParams;
    
    ffmpeg.Start();
    
    ffmpeg.WaitForExit(30000);*/
    
}
    

    
using (Process ffmaudio = new Process())
    
{
    
    //Add audio to video
    
    ffmaudiostartInfo = new ProcessStartInfo();
    
    ffmaudiostartInfo.FileName = ffmpegPath;
    
    ffmaudiostartInfo.Arguments = ffmaudioParams;
    
    ffmaudiostartInfo.RedirectStandardOutput = true;
    
    ffmaudiostartInfo.RedirectStandardError = true;
    
    ffmaudiostartInfo.UseShellExecute = false;
    
    ffmaudiostartInfo.CreateNoWindow = true;
    

    
    ffmaudio.StartInfo.FileName = ffmpegPath;
    
    ffmaudio.StartInfo.Arguments = ffmaudioParams;
    
    ffmaudio.StartInfo = ffmaudiostartInfo;
    
    ffmaudio.Start();
    
    ffmaudio.WaitForExit(30000);
    

    
    /*ffmaudio.StartInfo.FileName = "cmd.exe";
    
    ffmaudio.StartInfo.Arguments = "/k " + ffmpegPath + " " + ffmaudioParams;
    
    ffmaudio.Start();
    
    ffmaudio.WaitForExit(30000);*/
    
}

    So, what my code does, with the wavfilereader it gets the total length of my audio file, and then splits that time up by the number of images I have, so I can generate a video with the images split equally. Then I generate the video to a file called ’old.avi’, which is then used with my wav file to generate a new file called video.avi (which I am trying to have the generated video and audio together)

    My problem is when I generate the video it becomes uplayable. It claims to be (for example) 1 minute 50 seconds long, but once I click it, it won’t play. It just becomes unplayable, as you can see below

    http://i.imgur.com/tsck2NX.gifv

    I am using C# with process and Winforms, which opens the cmd line to run ffmpeg, with the 2 commands called above with the named variables below :

    ffmpegParams;
    
ffmaudioParams;

    Which has all the commands I am using

    -r 1/ (audio length /divided by total images) so they're equal
    
-t (to limit to the total time which is the audio's total seconds)
    
... I am using more as you can see in my code above

    How can I fix my problem, that I have described ?

    CMD line when generating the video :

    ffmpeg version N-86848-g03a9e6f Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 7.1.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
    
  libavutil      55. 68.100 / 55. 68.100
    
  libavcodec     57.102.100 / 57.102.100
    
  libavformat    57. 76.100 / 57. 76.100
    
  libavdevice    57.  7.100 / 57.  7.100
    
  libavfilter     6. 95.100 /  6. 95.100
    
  libswscale      4.  7.101 /  4.  7.101
    
  libswresample   2.  8.100 /  2.  8.100
    
  libpostproc    54.  6.100 / 54.  6.100
    
Input #0, image2, from 'C:\Users\Laptop\Documents\program/images/image-%d.png':
    
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: png, rgba(pc), 800x800, 25 tbr, 25 tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (png (native) -> mpeg4 (native))
    
Press [q] to stop, [?] for help
    
[mpeg4 @ 00000000024f44a0] bitrate tolerance 4000000 too small for bitrate 200000, overriding
    
Output #0, avi, to 'C:\Users\Laptop\Documents\program/old.avi':
    
  Metadata:
    
    ISFT            : Lavf57.76.100
    
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1280x1280, q=2-31, 200 kb/s, 0.01 fps, 0.01 tbn, 0.01 tbc
    
    Metadata:
    
      encoder         : Lavc57.102.100 mpeg4
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    
frame=    1 fps=0.0 q=6.8 Lsize=      46kB time=00:01:37.57 bitrate=   3.9kbits/s speed=1.43e+003x
    
video:41kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 13.641467%

    When adding the audio to the video

    ffmpeg version N-86848-g03a9e6f Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 7.1.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
    
  libavutil      55. 68.100 / 55. 68.100
    
  libavcodec     57.102.100 / 57.102.100
    
  libavformat    57. 76.100 / 57. 76.100
    
  libavdevice    57.  7.100 / 57.  7.100
    
  libavfilter     6. 95.100 /  6. 95.100
    
  libswscale      4.  7.101 /  4.  7.101
    
  libswresample   2.  8.100 /  2.  8.100
    
  libpostproc    54.  6.100 / 54.  6.100
    
Input #0, avi, from 'C:\Users\Laptop\Documents\program/old.avi':
    
  Metadata:
    
    encoder         : Lavf57.76.100
    
  Duration: 00:01:37.58, start: 0.000000, bitrate: 3 kb/s
    
    Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46), yuv420p, 1280x1280 [SAR 1:1 DAR 1:1], 0.01 fps, 0.01 tbr, 0.01 tbn, 40 tbc
    
Guessed Channel Layout for Input Stream #1.0 : mono
    
Input #1, wav, from 'C:\Users\Laptop\Documents\program/audio.wav':
    
  Duration: 00:01:37.57, bitrate: 352 kb/s
    
    Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, mono, s16, 352 kb/s
    
Output #0, avi, to 'C:\Users\Laptop\Documents\program/video.avi':
    
  Metadata:
    
    ISFT            : Lavf57.76.100
    
    Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46), yuv420p, 1280x1280 [SAR 1:1 DAR 1:1], q=2-31, 0.01 fps, 0.01 tbr, 0.01 tbn, 0.01 tbc
    
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, mono, s16, 352 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #1:0 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=    1 fps=0.0 q=-1.0 Lsize=      55kB time=00:01:37.57 bitrate=   4.6kbits/s speed=1.95e+005x
    
video:41kB audio:4kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 21.946869%

  • Nginx rtmp module - on_publish fires multiple time instead of once

    29 juillet 2017, par Stephen Wright

    This is copy and pasted from the bug report I created on the rtmp-module by Arut, I am not completely sure if it is a bug or me not understanding how the module works, I have read the whole directives of module as from https://github.com/arut/nginx-rtmp-module/wiki/Directives

    Proper explanation, if code is not displayed properly I will edit and fix

    Hi, been using the module and finding it very very good !

    Think I have found a issue though, although it may be me misunderstanding the directives.

    Essentially I wish to fire a script (/usr/local/bin/make_thumbnail.sh) which creates a thumbnail automatically from a stream (using ffmpeg), the idea is to have this done for every stream as soon as it is published in order to create a function a bit like twitch tv where the streamer will not have to specify any thumbnail image, authenticated users simply start a stream (which will later be authenticated but is not yet) The script does also write data into the database however this stage works fine and I don’t believe the issue is related, if I comment out these lines then the thumbnail creation still works and my issue continues.

    Initially this was done using the "exec" command as I believe I mis-read the documentation and I believe the exec command doesn’t work for my problem as ". When publishing stops the process is terminated." does this mean it will continually execute until stream stops ?

    I have started using the exec_publish command to try and fix this issue however the same issue seems to occur. The entire script repeats approximately every 15-17 seconds, a new thumbnail is created and a new database entry is create with all the correct information.

    Below is the nginx.conf line. Please ignore if indentation is incorrect couldn’t see a way to indent blocks of code and it’s late here, assume all code is indented correctly unless you believe that could be the issue in which case I will post it indented as early as I can.

    application live {
    
allow play all;
    
live on;
    
record all;
    
record_path /var/stream/video_recordings/;
    
record_unique on; 
    
hls on;
    
hls_nested on;
    
hls_path /var/stream/HLS/live;
    
hls_fragment 10s;
    

    
#on publish create thumbnail using first second of stream and save in 
    
/var/stream/video_recordings/thumbnails
    
exec_publish usr/local/bin/make_thumbnail.sh $name;

    The rest can be pasted or attached if needed but is working nginx config for rtmp + website

    The most simple version of the make_thumbnail..sh is pasted below, I have omitted the variables that I have used for database entryys obviously but as the script works without fail from terminal I believe this to be an nginx issue (if I run the command manually under the nginx user e.g. sudo -u nginx /usr/local/bin/make_thumbnail.sh with a name the same as any running stream, it works and only executes once as would expect, all permissions in script are ok and tested.

    make_thumbnail.sh

    #!/bin/bash
    

    
TIME=$(date +%s)
    
NAME=$1 
    
echo "time: "
    
FILENAME=${TIME}_${NAME}
    

    
ffmpeg -i rtmp://192.168.0.98:1935/live/$1 -vframes 1 -s 150x150 -ss 10 -
    
strftime 1 /var/stream/video_recordings/thumbnails/"$FILENAME.jpg";
    

    
#Writes path to video into database
    
mysql --user=$DB_USER --password=$DB_PASSWD $DB_NAME << EOF
    
INSERT INTO $TABLE3 (thumbnailfile) VALUES ('$FILENAME');
    
set @last_id_in_thumbnails = LAST_INSERT_ID();
    
INSERT INTO $TABLE (created_at, updated_at, thumnailID) VALUES 
    
(NOW(),NOW(),@last_id_in_thumbnails);
    
SET @last_id_in_livestreams = LAST_INSERT_ID();
    
INSERT INTO $TABLE2 (created_at, updated_at, filename,liveID) VALUES 
    
(NOW(),NOW(),'$FILENAME',@last_id_in_livestreams); 
    
EOF

    I have not got the nginx rtmp logs installed, I can obviously do this however some of the logs appear in the nginx error.log, strangely the latest stream I tried did not update in the access log, however I think this is because I did not attempt to connect to it via any method. I don’t fully understand the error.log, in my stupidity I decided to use nginx with which I am quite inexperienced and I am finding it very difficult to troubleshoot this issue, it appears to me that as part of the RTMP protocol or my streaming software (OBS) is either directly pinging the rtmp stream or is being pinged by the server to ensure the connection is still there. And this ping is

    I have left a stream running from approx 4 minutes without interacting with the server, streaming software, computer running the stream, I have ensured the internet connection is constant as my first though was the connection dropped, however on inspecting the database the executing is done always after at least 11 seconds however usually this is 16, I can’t seem to figure out how to select the closest dates from the database however there has been at least a few 17 second differences (potentially when
    I am unsure if this is an issue or if it is intended behavior but I do require this to finish a university degree, I’m not asking for answers but if it is a legitimate issue then I would be happy to spend as much time I can commit to it if some insight into what is causing it, or if there is a workaround I believe it should be documented somewhere, I have googled into making any exec commands run only once on publish

    I can’t seem to pinpoint where in the log the issue is happening however think it is something to do with the below exceprts I would attach the file but can’t seem to select all lines after the timestamp upon starting a stream

    2017/07/26 18:17:35 [info] 1451#0: *2229 exec: starting managed child 
    
'ffmpeg', client: 192.168.0.78, server: 0.0.0.0:1935
    
2017/07/26 18:17:35 [info] 1451#0: *2412 client connected '192.168.0.98'
    
2017/07/26 18:17:35 [info] 1451#0: *2412 connect: app='live' args='' 
    
flashver='LNX 9,0,124,2' swf_url='' tc_url='rtmp://192.168.0.98:1935/live' 
    
page_url='' acodecs=4071 vcodecs=252 object_encoding=0, client: 
    
192.168.0.98, server: 0.0.0.0:1935
    
2017/07/26 18:17:35 [info] 1451#0: *2412 createStream, client: 192.168.0.98, 
    
server: 0.0.0.0:1935
    
2017/07/26 18:17:35 [info] 1451#0: *2412 play: name='newname' args='' 
    
start=-2000 duration=0 reset=0 silent=0, client: 192.168.0.98, server:  
    
0.0.0.0:1935
    
2017/07/26 18:17:36 [info] 1451#0: *2410 recv() failed (104: Connection  
    
reset by peer), client: 192.168.0.98, server: 0.0.0.0:1935
    
2017/07/26 18:17:36 [info] 1451#0: *2410 disconnect, client: 192.168.0.98, 
    
server: 0.0.0.0:1935
    
2017/07/26 18:17:36 [info] 1451#0: *2410 deleteStream, client: 192.168.0.98, 
    
server: 0.0.0.0:1935
    
2017/07/26 18:17:36 [notice] 1451#0: signal 17 (SIGCHLD) received
    
2017/07/26 18:17:36 [notice] 1451#0: unknown process 10487 exited with code 
    
0
    
2017/07/26 18:17:36 [info] 1451#0: *2229 exec: child 10487 exited; ignoring, 
    
client: 192.168.0.78, server: 0.0.0.0:1935
    

    
ver: 0.0.0.0:1935
    
2017/07/26 18:17:41 [info] 1451#0: *2229 exec: starting managed child 
    
'usr/local/bin/make_thumbnail.sh', client: 192.168.0.78, server:  
    
0.0.0.0:1935
    
2017/07/26 18:17:41 [info] 1451#0: *2413 client connected '192.168.0.98'
    
2017/07/26 18:17:41 [info] 1451#0: *2413 connect: app='live' args='' 
    
flashver='LNX 9,0,124,2' swf_url='' tc_url='rtmp://192.168.0.98:1935/live' 
    
page_url='' acodecs=4071 vcodecs=252 object_encoding=0, client: 
    
192.168.0.98, 
    
server: 0.0.0.0:1935
    
2017/07/26 18:17:41 [info] 1451#0: *2413 createStream, client: 192.168.0.98, 
    
server: 0.0.0.0:1935
    
2017/07/26 18:17:41 [info] 1451#0: *2413 play: name='newname' args='' 
    
start=-2000 duration=0 reset=0 silent=0, client: 192.168.0.98, server: 
    
0.0.0.0:1935
    
2017/07/26 18:17:43 [info] 1451#0: *2229 exec: starting managed child 
    
'ffmpeg', 
    
client: 192.168.0.78, server: 0.0.0.0:1935
    
2017/07/26 18:17:43 [info] 1451#0: *2414 client connected '192.168.0.98'
    
2017/07/26 18:17:43 [info] 1451#0: *2414 connect: app='live' args='' 
    
flashver='LNX 9,0,124,2' swf_url='' tc_url='rtmp://192.168.0.98:1935/live' 
    
page_url='' acodecs=4071 vcodecs=252 object_encoding=0, client: 
    
192.168.0.98, 
    
server: 0.0.0.0:1935
    
@

  • FFMPEG and libavfilter

    21 mars 2012, par Sergio

    With the currently installed ffmpeg I can't post watermark on converted videos. Can the reason for that be that I have not installed libavfilter library ?

    Currently # ffmpeg -v looks like :

    FFmpeg version SVN-r20374, Copyright (c) 2000-2009 Fabrice Bellard, et al.
    
built on Oct 26 2009 22:47:01 with gcc 4.1.2 20080704 (Red Hat 4.1.2-46)
    
configuration: --enable-libmp3lame --enable-libopencore-amrnb --enable-version3 -   enable-libopencore-amrwb --enable-version3 --enable-nonfree --enable-libfaad --enable-gpl - -disable-mmx --enable-shared --enable-libfaac --enable-libvorbis
    
libavutil     50. 3. 0 / 50. 3. 0
    
libavcodec    52.37. 1 / 52.37. 1
    
libavformat   52.39. 2 / 52.39. 2
    
libavdevice   52. 2. 0 / 52. 2. 0

    As you can see I'm missing libavfilter ? How can I add that library to FFMPEG and successfully add watermark on videos ?

    Thanks for any help.

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