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• Add "prefer_tcp" flag to "rtsp_flags"

  4 mars 2014, par Andrey Utkin

  Add "prefer_tcp" flag to "rtsp_flags"
  If set, and if TCP is available as RTSP RTP transport, then TCP will be
  
  tried first as RTP transport.
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] doc/protocols.texi
  • [DH] libavformat/rtsp.c
  • [DH] libavformat/rtsp.h

• node-fluent-ffmpeg conversion to mp3 does not fire any "end" or "finish" event

  27 février 2024, par 1voy

  I am downloading a video using ytdl-core and converting it to mp3 using node-fluent-ffmpeg. It seems that the code after the ffmpeg conversion gets executed before the conversion finishes as trying to upload the .mp3 file to a Google Cloud Storage bucket throws an error. I am trying to detect 'end' or 'finish' events but none are being triggered.

  


  Code :

  


  ytdl(url?.toString() as string)
    .once('data', (data) => {
      console.log('start', data);
    })
    .on('progress', async function (progress, downloaded, total) {
      console.log(parseInt(((downloaded / total) * 100).toString()) + '%');
      
    })
    .on('finish', async function () {
      console.log('Download finished...');
      
      console.log('using ffmpeg to convert into mp3');
      Ffmpeg({ source: `/Users/user/project/server/output/${videoId}.mp4` })
        .setFfmpegPath(ffmpeg.path)
        .toFormat('mp3')
        .saveToFile(`/Users/user/project/server/output/${videoId}.mp3`)
        .on('finish', () => {
          console.log('finished conversion');
        });
      console.log('after ffmpeg mp3 conversion');

      const storage = new Storage({
        keyFilename: `./key.json`,
      });

      const bucketName = 'bucketname';
      const bucket = storage.bucket(bucketName);
      let mp3_url;
      console.log(
        fs.existsSync(`/Users/user/project/server/output/${videoId}.mp3`)
      ); // returns false
      bucket.upload(
        `/Users/user/project/server/output/${videoId}.mp3`,
// Error uploading: Error: ENOENT: no such file or directory, open '/Users/me/project/server/output/RMvenf7E-Dg.mp3'
        {
          destination: `${userId}/${videoId}.mp3`,
        },
        function (err, file) {
          if (err) {
            console.error(`Error uploading: ${err}`);
          } else {
            console.log(`mp3 uploaded to ${bucketName}.`);
            console.log(file?.publicUrl());
          }
        }
      );

      
    .pipe(
      fs.createWriteStream(`/Users/me/project/server/output/${videoId}.mp4`)
    );

  console.log('after download and conversion');

  req.on('close', async () => {
    res.end();
  });


  


  Error uploading: Error: ENOENT: no such file or directory, open '/Users/polo/makeklips/server/output/RMvenf7E-Dg.mp3'
[1] /Users/me/project/server/node_modules/.pnpm/fluent-ffmpeg@2.1.2/node_modules/fluent-ffmpeg/lib/processor.js:182
[1]           handleExit(new Error('ffmpeg exited with code ' + code));
[1]                      ^
[1] Error: ffmpeg exited with code 1: Output #0, mp3, to '/Users/me/project/server/output/RMvenf7E-Dg.mp3':
[1] Output file #0 does not contain any stream


  


• Edit H264 video stream header information ("start_pts" and "start_time")

  27 juin 2020, par David

  I have a video clip that appears to be slightly corrupted. Does not play on VLC but works on Potplayer. I used FFprobe to get information on the video.

  


  The problem appears to be with the start points of the video stream :

  


  time_base=1/90000
start_pts=585050940
start_time=6500.566000
duration_ts=585050940
duration=6500.566000
bit_rate=3123218


  


  I'm just wondering whether it is possible to manually edit the "start_pts" and "start_time" to 0 ? Is there any specific software to do this ? Due to large size of video file, I couldn't load it in Notepad++.

  


  Full ffprobe output shown below :

  


  # ffprobe output

[streams.stream.0]
index=0
codec_name=h264
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
profile=unknown
codec_type=video
codec_time_base=1/60
codec_tag_string=avc1
codec_tag=0x31637661
width=1920
height=1080
coded_width=1920
coded_height=1080
closed_captions=0
has_b_frames=0
sample_aspect_ratio=N/A
display_aspect_ratio=N/A
pix_fmt=unknown
level=-99
color_range=unknown
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=unspecified
field_order=unknown
timecode=N/A
refs=1
is_avc=true
nal_length_size=4
id=N/A
r_frame_rate=30/1
avg_frame_rate=30/1
time_base=1/90000
start_pts=585050940
start_time=6500.566000
duration_ts=585050940
duration=6500.566000
bit_rate=3123218
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=195017
nb_read_frames=N/A
nb_read_packets=N/A

[streams.stream.0.disposition]
default=1
dub=0
original=0
comment=0
lyrics=0
karaoke=0
forced=0
hearing_impaired=0
visual_impaired=0
clean_effects=0
attached_pic=0
timed_thumbnails=0

[streams.stream.0.tags]
language=und
handler_name=VideoHandler

[streams.stream.1]
index=1
codec_name=aac
codec_long_name=AAC (Advanced Audio Coding)
profile=LC
codec_type=audio
codec_time_base=1/48000
codec_tag_string=mp4a
codec_tag=0x6134706d
sample_fmt=fltp
sample_rate=48000
channels=2
channel_layout=stereo
bits_per_sample=0
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/48000
start_pts=0
start_time=0.000000
duration_ts=312029184
duration=6500.608000
bit_rate=189376
max_bit_rate=189376
bits_per_raw_sample=N/A
nb_frames=304718
nb_read_frames=N/A
nb_read_packets=N/A

[streams.stream.1.disposition]
default=1
dub=0
original=0
comment=0
lyrics=0
karaoke=0
forced=0
hearing_impaired=0
visual_impaired=0
clean_effects=0
attached_pic=0
timed_thumbnails=0

[streams.stream.1.tags]
language=eng
handler_name=SoundHandler

[format]
filename=D\:\\Start\\test.mp4
nb_streams=2
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=0.000000
duration=6500.608000
size=2703218140
bit_rate=3326726
probe_score=100

[format.tags]
major_brand=isom
minor_version=512
compatible_brands=isomiso2avc1mp41