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• Fatal signal 11 (SIGSEGV), code 1, fault addr 0x9 in tid 31051

  20 juillet 2021, par 林聖達

  I building project ,I able login my account and it is unable to living stream .
Camera is ok. When the program is execution to Ffmpeg_init() that will be error.
I get a few of question,

  



  Question1.
E/ACDB-LOADER : Error : ACDB AudProc vol returned = -19
Error : ACDB AFE returned = -19
I don't know this error what happened.

  



  Question2.
I use addr2line (NDK-TOOLTAIONS) to debug , I get some message.
pc 0050c99c /data/app/com.cmore.youtube-2/lib/arm/libffmpeg.so (avcodec_get_context_defaults3+56)
I didn't never modify this file.

  



  10-15 18:39:17.848 31051-31051/com.cmore.youtube A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x9 in tid 31051 (m.cmore.youtube)
10-15 18:39:17.898 430-430/? A/DEBUG: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
10-15 18:39:17.898 430-430/? A/DEBUG: Build fingerprint: 'htc/htc_asia_tw/htc_a51dtul:6.0.1/MMB29M/738098.3:user/release-keys'
10-15 18:39:17.898 430-430/? A/DEBUG: Revision: '0'
10-15 18:39:17.898 430-430/? A/DEBUG: ABI: 'arm'
10-15 18:39:17.898 430-430/? A/DEBUG: pid: 31051, tid: 31051, name: m.cmore.youtube >>> com.cmore.youtube <<<
10-15 18:39:17.898 430-430/? A/DEBUG: signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x9
10-15 18:39:17.898 433-31603/? E/ACDB-LOADER: Error: ACDB AudProc vol returned = -19
10-15 18:39:17.898 433-31603/? E/ACDB-LOADER: Error: ACDB AFE returned = -19
10-15 18:39:17.908 430-430/? A/DEBUG: r0 ab36b9a0 r1 00000000 r2 00000000 r3 d6a225c0
10-15 18:39:17.908 430-430/? A/DEBUG: r4 d6a35d18 r5 00000001 r6 ab36b6f0 r7 ab36aac0
10-15 18:39:17.908 430-430/? A/DEBUG: r8 ab36b9a0 r9 00000001 sl 12c590f0 fp 000001e0
10-15 18:39:17.908 430-430/? A/DEBUG: ip 00000000 sp ffcb4778 lr d6440980 pc d644099c cpsr 200f0010
10-15 18:39:17.918 430-430/? A/DEBUG: backtrace:
10-15 18:39:17.918 430-430/? A/DEBUG: #00 pc 0050c99c /data/app/com.cmore.youtube-2/lib/arm/libffmpeg.so (avcodec_get_context_defaults3+56)


  


• How to transcode flash movie to mp4, then upload to s3

  13 octobre 2017, par user1790300

  I am using the fluent-ffmpeg library with node.js to transcode videos originally in a flash movie format to the mp3 format with multiple resolutions, 1080p, etc.. Once the transcoding is complete, I would like to move the transcoded video to an s3 bucket.

  I pull the original .flv file from a source s3 bucket and pass the stream to the ffmpeg constructor function. The issue is after the transcoding completes, how do I then get the stream of the mp4 data to send to s3.

  Here is the code I have so far :

          var params = {
  
              Bucket: process.env.SOURCE_BUCKET,
  
              Key: fileName
  
          };
  
          s3.getObject(params, function(err, data) {
  
              if (err) console.log(err, err.stack); // an error occurred
  
  
  
              var format = ffmpeg(data)
  
              .size('854x480')
  
              .videoCodec('libx264')
  
              .format('flv')
  
              .toFormat('mp4');
  
              .on('end', function () {
  
                  //Ideally, I would like to do the uploading here
  
  
  
                  var params = {
  
                     Body: //{This is my confusion, how do I get the stream to add here?},
  
                     Bucket: process.env.TRANSCODED_BUCKET,
  
                     Key: fileName
  
                  };
  
                  s3.putObject(params, function (err, data) {
  
  
  
                 });
  
              })
  
              .on('error', function (err) {
  
                  console.log('an error happened: ' + err.message);
  
              });
  
  
  
          });

  For the code above, where can I get the transcoded stream to add to the "Body" property of the params object ?

• Adding multiple subtitle streams to MP4 with FFMPEG

  5 janvier 2021, par Dragonix

  After a lot of trial and error, I managed to add multiple subtitle streams to one MP4.
However, when checking the metadata of the MP4, I see some results that I want to change, hoping someone can help me or can explain why it happened.

  



  This is the input (original MP4 to which I added subtitle streams)

  



  $ ffmpeg -i movie.mp4 
ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
   Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2048x872 [SAR 1:1 DAR 256:109], 2352 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc (default)
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 440 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : SoundHandler


  



  Then, I execute the following command. I gathered this information from different sources and I'm not an FFMPEG guru :)

  



  ffmpeg -i movie.mp4 -f srt -i nl.srt -i mk.srt -i sk.srt \
-map 0:0 -map 0:1 -map 1:0 -map 2:0 -map 3:0 \
-c:v copy -c:a copy \
-c:s mov_text -c:s mov_text -c:s mov_text \
-metadata:s:s:0 language=nld -metadata:s:s:1 language=mkd -metadata:s:s:2 language=skv \
NEW.mp4


  



  In a few seconds, the NEW.mp4 is created and when playing the video I get the video and audio that I expect and 3 subtitle streams that can be switched during playback. The subtitles itself are also what I expect to be.

  



  Output of NEW.mp4

  



  $ ffmpeg -i NEW.mp4 
ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2048x872 [SAR 1:1 DAR 256:109], 2352 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
Metadata:
  handler_name    : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 440 kb/s (default)
Metadata:
  handler_name    : SoundHandler
Stream #0:2(nld): Subtitle: mov_text (tx3g / 0x67337874), 0 kb/s (default)
Metadata:
  handler_name    : SubtitleHandler
Stream #0:3(mkd): Subtitle: mov_text (tx3g / 0x67337874), 0 kb/s
Metadata:
  handler_name    : SubtitleHandler
Stream #0:4(svk): Subtitle: mov_text (tx3g / 0x67337874), 0 kb/s
Metadata:
  handler_name    : SubtitleHandler


  



  I'm not sure if the type of subtitle is the one I should use -> 'mov_text'. If I use the same command but instead of using 'mov_text', I want to use 'srt' or 'subrip', I get some errors.

  



  [mp4 @ 0x7ba2c0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0x7ba2c0] Codec for stream 1 does not use global headers but container format requires global headers
[mp4 @ 0x7ba2c0] Could not find tag for codec subrip in stream #2, codec not currently supported in container


  



  The only question that remains for me is how can I make it work with 'srt' or 'subrip' ? In the meantime I will look for solutions and when found, I will put it here.