Re: [FFmpeg-user] Concatenation of two *.mp4 files --- How?

[Carl Eugen Hoyos]

Virgil Stokes  it.uu.se> writes:

> I have two mp4 files (the first (testImage.mp4 with no audio) 
> created from a png file with ffmpeg

I suspect that if you don't want to reencode, you will have to 
produce the video stream together with silent audio.

But I suspect that concatenation of H264 streams that were 
generated on different systems is not guaranteed to work, 
so maybe reencoding is unavoidable.

Please try the concat demuxer or the concat filter, the 
concat protocol does not work for mov and friends.

Carl Eugen

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[FFmpeg-user] Concatenation of two *.mp4 files --- How?

[Virgil Stokes]

I have two mp4 files (the first (testImage.mp4 with no audio) created
 from a png file with ffmpeg [vers. N-79947-gcd244fa Copyright (c) 2000-2016
 the FFmpeg developers built with gcc 5.3.0 (GCC)]

and the second (test.mp4 width video and audio) downloaded from YouTube.

I obtained the following information on these files using
 ffprobe [vers. N-79947-gcd244fa Copyright (c) 2007-2016 the
 FFmpeg developers built with gcc 5.3.0 (GCC)]:

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'testImage.mp4':
  Metadata:
major_brand : isom
minor_version   : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.36.100
  Duration: 00:00:10.00, start: 0.00, bitrate: 33 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280
[SAR 4005:1184 DAR 445:74], 30 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
Metadata:
  handler_name: VideoHandler

+++

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
  Metadata:
major_brand : mp42
minor_version   : 0
compatible_brands: isommp42
creation_time   : 2015-10-28 06:13:56
  Duration: 00:01:35.64, start: 0.00, bitrate: 1370 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720
[SAR 1:1 DAR 16:9], 1176 kb/s, 29.97 fps, 29.97 tbr, 30k tbn (default)
Metadata:
  handler_name: VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo,
fltp, 192 kb/s (default)
Metadata:
  creation_time   : 2015-10-28 06:13:56
  handler_name: IsoMedia File Produced by Google, 5-11-2011

How can I concatenate these two files with ffmpeg?

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