[FFmpeg-trac] #5454(undetermined:closed): problem concatenating videos

FFmpeg trac at avcodec.org
Tue Apr 26 20:36:50 CEST 2016


#5454: problem concatenating videos
-------------------------------------+-------------------------------------
             Reporter:  edotom       |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |  needs_more_info
Analyzed by developer:  0            |               Blocked By:
                                     |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by edotom):

 Hello
 i'm using Windows versiĆ³n of the software (I'm not using git)
 This is the info that I've got from log:
 ffmpeg version N-76456-g6df2c94 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 5.2.0 (GCC)


 I managed to upload three files:
 1_REGISTROENTRADA1.mkv
 9_FURAlineacion.jpg
 understandingTheProblem.txt

 As I received an error when trying to ftp the rest of files(I had too many
 connections from your ip), I think we can reproduce error like this:

 create at least 10 copies of the same jpg file:
 ffmpeg -report  -framerate 1/7 -i 9_FURAlineacion.jpg -c:v libx264 -r 30
 -pix_fmt yuv420p  anyname.mp4


 create at least 10 copies of the same mkv file:
 ffmpeg  -report -i 1_REGISTROENTRADA1.mkv -vcodec copy anyname.mp4

 insert alternately every video file into a txt file:

 file '1_anynamejpg.mp4'
 file '1_anynamemkv.mp4'
 file '2_anynamejpg.mp4'
 file '2_anynamemkv.mp4'
 file '3_anynamejpg.mp4'
 file '3_anynamemkv.mp4'
 file '4_anynamejpg.mp4'
 file '4_anynamemkv.mp4'
 file '5_anynamejpg.mp4'
 file '5_anynamemkv.mp4'
 file '6_anynamejpg.mp4'
 file '6_anynamemkv.mp4'
 file '7_anynamejpg.mp4'
 file '7_anynamemkv.mp4'
 file '8_anynamejpg.mp4'
 file '8_anynamemkv.mp4'
 file '9_anynamejpg.mp4'
 file '9_anynamemkv.mp4'
 file '10_anynamejpg.mp4'
 file '10_anynamemkv.mp4'

 Then unite all videos using concat:

 ffmpeg -report -f concat -i allVideos.txt -c copy results.mp4


 The issue that I'me experiencing is that in joined video, videos created
 originally from images (they were originally bmps converted to jpg) show
 problems like not being shown, shown for more or less time than original
 video or even worse... they make video player stall when their part is
 played or closed without warning.

 regards

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5454#comment:14>
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