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• ffmpeg demux concat drops audio even though streams look identical

  27 septembre 2022, par Ben Olayinka

  I'm trying to demux two videos, but I'm getting an error and the audio from the second video is lost. Here's the ffprobe outputs

  


  video 1 :

  


  ffprobe bumpers/intro_final.mp4
ffprobe version 5.1.2 Copyright (c) 2007-2022 the FFmpeg developers
  built with Apple clang version 14.0.0 (clang-1400.0.29.102)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/5.1.2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-neon
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'bumpers/intro_final.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf59.27.100
  Duration: 00:00:10.05, start: 0.000000, bitrate: 795 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080, 654 kb/s, 25 fps, 25 tbr, 25 tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
      encoder         : Lavc59.37.100 libx264
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 135 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]



  


  video 2 :

  


  ffprobe input/ORIGINAL.mp4 
ffprobe version 5.1.2 Copyright (c) 2007-2022 the FFmpeg developers
  built with Apple clang version 14.0.0 (clang-1400.0.29.102)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/5.1.2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-neon
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input/ORIGINAL.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: iso4avc1isom
    creation_time   : 2022-09-22T09:39:50.000000Z
    com.apple.proapps.clipID: ThingsConference_ST2_01 6
    com.blackmagic-design.camera.dateRecorded: 2022:09:22
    com.apple.proapps.cameraName: 0
    com.blackmagic-design.camera.uuid: 92162B194AF84F1D8F186FBFEC9EDA9F-0
  Duration: 00:17:34.00, start: 0.000000, bitrate: 30012 kb/s
  Stream #0:0[0x1](eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080, 29880 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn (default)
    Metadata:
      creation_time   : 2022-09-22T09:39:50.000000Z
      handler_name    : ?Apple Video Media Handler
      vendor_id       : BMAG
      encoder         : H264/AVC
      timecode        : 11:39:50:00
  Stream #0:1[0x2](eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2022-09-22T09:39:50.000000Z
      handler_name    : ?Time Code Media Handler
      timecode        : 11:39:50:00
  Stream #0:2[0x3](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2022-09-22T09:39:50.000000Z
      handler_name    : ?Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
      timecode        : 11:39:50:00
Unsupported codec with id 0 for input stream 1


  


  And I'm running

  


  ffmpeg -f concat -safe 0 -i mylist.txt -c copy output-demux.mp4


  


  Which returns

  


  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x13ef058c0] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from 'mylist.txt':
  Duration: N/A, start: -0.021333, bitrate: 789 kb/s
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080, 654 kb/s, 25 fps, 25 tbr, 25 tbn
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
      encoder         : Lavc59.37.100 libx264
  Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 135 kb/s
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
File 'output-demux.mp4' already exists. Overwrite? [y/N] y
Output #0, mp4, to 'output-demux.mp4':
  Metadata:
    encoder         : Lavf59.27.100
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080, q=2-31, 654 kb/s, 25 fps, 25 tbr, 12800 tbn
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
      encoder         : Lavc59.37.100 libx264
  Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 135 kb/s
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=    1 fps=0.0 q=-1.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x13ee06b10] Auto-inserting h264_mp4toannexb bitstream filter
[mp4 @ 0x13ee10a90] Non-monotonous DTS in output stream 0:1; previous: 482304, current: 1275; changing to 482305. This may result in incorrect timestamps in the output file.
[concat @ 0x13ef05200] New audio stream 0:2 at pos:792252 and DTS:10.0053s
frame= 2963 fps=0.0 q=-1.0 size=  336384kB time=00:01:58.52 bitrate=23250.6kbitsframe= 5465 fps=5464 q=-1.0 size=  695552kB time=00:03:38.60 bitrate=26065.7kbitframe= 8609 fps=5738 q=-1.0 size= 1033728kB time=00:05:44.36 bitrate=24591.4kbitframe=10978 fps=5488 q=-1.0 size= 1353984kB time=00:07:19.12 bitrate=25259.2kbitframe=13365 fps=5345 q=-1.0 size= 1715968kB time=00:08:54.60 bitrate=26294.8kbitframe=16480 fps=5492 q=-1.0 size= 2077952kB time=00:10:59.20 bitrate=25823.1kbitframe=18595 fps=5311 q=-1.0 size= 2436608kB time=00:12:23.80 bitrate=26836.1kbitframe=20753 fps=5187 q=-1.0 size= 2787072kB time=00:13:50.12 bitrate=27504.1kbitframe=22825 fps=5068 q=-1.0 size= 3157504kB time=00:15:13.00 bitrate=28331.1kbitframe=24700 fps=4935 q=-1.0 size= 3497216kB time=00:16:28.00 bitrate=28997.2kbitframe=26601 fps=4859 q=-1.0 Lsize= 3845642kB time=00:17:44.04 bitrate=29607.4kbits/s speed= 194x    
video:3845343kB audio:166kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.003468%


  


  I just noticed the "Unsupported codec" error for video 2, but I've tried concating video 1 with itself and video 2 with itself and both work fine.

  


• How to create photos to video maker app in android ?

  15 octobre 2022, par MehulGohil

  How can I create photo to video maker app for android ?

  


  https://play.google.com/store/apps/details?id=com.shortly.videomaker.video.status

  


  I want to make the same app. I researched the last few weeks but still not find the solutions. Please help me with this. Is there any specific SDK or API ?

  


• Death of A Micro Center

  21 septembre 2012, par Multimedia Mike — History

  The Micro Center computer store located in Santa Clara, CA, USA closed recently :

  
  
  

  I liked Micro Center. I have liked Micro Center ever since I first visited their Denver, CO location 10 years ago. I would sometimes drive an hour in each direction just to visit that shop. I was excited to see that they had a location in the Bay Area when I moved here a few years ago (despite the preponderance of Fry’s stores).

  Now this location is gone. I wonder how much of the “we couldn’t come to favorable terms on a lease” was true (vs. an excuse to close a retail store at a time when more business is moving online, particularly in the heart of Silicon Valley). But that’s not what I wanted to discuss. I came here to discuss…

  The Micro Center Window Logos

  The craziest part about shopping the Santa Clara Micro Center location was the logos they displayed on the window outside. Every time I saw it, it made me sentimental for a time when some of these logos were current, or when some of these companies were still in business. Some of the logos on their front window were for companies I’ve never heard of. It reminds me of the nearby 7-11 convenience stores when I was growing up– their walls were decorated with people sporting embarrassingly 1970s styles long after the 1970s had transpired.

  I thought I would record what those front window logos were and try to pinpoint when the store launched exactly (assuming the logos have been their since the initial opening and never changed).

  
  
  Click for larger image
  

  Here we have Lotus, Hewlett Packard/HP, Corel, Fuji, Power Macintosh, NEC, and Fujitsu. Lotus was purchased by IBM in 1995 and still seems to be maintained as a separate brand. The Power Macintosh was introduced as a brand in 1994. Corel’s logo has seen a few mutations over the years but I don’t know when this one fell out of favor.

  Fuji (vs. Fujitsu) appears to refer to Fujifilm, though this logo is also obsolete.

  
  
  Click for larger image
  

  Hayes– I specifically remember reading the Slashdot post accouncing that Hayes is dead (followed by many comments reminiscing about the Hayes command set). Here is the post, from early 1999.

  From Googling, it doesn’t appear IBM still has a presence in the consumer computing space (though they do have something pertaining to software for consumer products). Then there’s the good old rainbow Apple logo, something that went away in 1997. I suspect 1997 was also the last hurrah of the name ‘Macintosh’ (though I remember mistakenly referring to Apple computer products as Macintoshes well into the mid-2000s and inadvertently angering some Apple enthusiasts).

  
  
  Click for larger image
  

  As for the next segment, obviously, both Sony and Toshiba are still very much alive. Iomega was acquired by EMC in 2008 but is still maintained as a separate brand. USRobotics is still around and making — what else ? — 56K modems (and their current logo is slightly different than the one seen here).

  Targus seems to be a case maker (“Leading Provider of Cases, Bags and Accessories for Laptops and Tablets”). I wonder if that’s just their current business or if they had more areas long ago ? It seems strange that they would get brand billing like this.

  Finally, searching for information about Practical Peripherals only produces sites about how they’re long dead (like this history lesson). It’s unclear when they died.

  The interior of this store was also decorated with more technology company logos near the ceiling (I didn’t really register that fact until I had visited many times). Regrettably, I now won’t be able to see how up to date those logos were.

  Based on the data points above, it’s safe to conclude that the store opened between 1995 or 1996 (again, assuming the logos were placed at opening and never changed).

  Epilogue

  Here’s one more curious item still visible from the outside :

  
  
  

  “See the world’s fastest PC !” Featuring an Intel Core 2 Extreme ? That CPU dates back to 2007 and was succeeded by Nehalem in late 2008. So even that sign, which is presumably easier and cleaner to replace than the window logos, was absurdly out of date.