[FFmpeg-user] Approach to Fully Lossless Concat

[VP Lists]

On Oct 4:

> Hi folks.  I’ve created a list of small clips in random order, each with a unique filename.  This file is used for a concat input file.  
> 
> In the verbose processing, I get lots of these after a few of the first files are processed:
> 
> Error while decoding stream #0:0: Invalid data found when processing input
> [h264 @ 0x7fe65c062800] Invalid NAL unit 1, skipping.
> [h264 @ 0x7fe65c062800] no frame!
> Error while decoding stream #0:0: Invalid data found when processing input
> [h264 @ 0x7fe65c078c00] No start code is found.
> [h264 @ 0x7fe65c078c00] Error splitting the input into NAL units.
> Error while decoding stream #0:0: Invalid data found when processing input
> [h264 @ 0x7fe65c08f000] No start code is found.
> [h264 @ 0x7fe65c08f000] Error splitting the input into NAL units.
> Error while decoding stream #0:0: Invalid data found when processing input
> [h264 @ 0x7fe65c0a5400] No start code is found.
> [h264 @ 0x7fe65c0a5400] Error splitting the input into NAL units.
> Error while decoding stream #0:0: Invalid data found when processing input
> [h264 @ 0x7fe65c0bb800] No start code is found.
> [h264 @ 0x7fe65c0bb800] Error splitting the input into NAL units.
> [aac @ 0x7fe65c00d200] channel element 1.0 is not allocated
> Error while decoding stream #0:1: Invalid data found when processing input
> [aac @ 0x7fe65c00d200] channel element 1.4 is not allocated
> Error while decoding stream #0:1: Invalid data found when processing input
> [aac @ 0x7fe65c00d200] channel element 1.0 is not allocated
> Error while decoding stream #0:1: Invalid data found when processing input
> [aac @ 0x7fe65c00d200] channel element 1.0 is not allocated
> Error while decoding stream #0:1: Invalid data found when processing input
> [aac @ 0x7fe65c00d200] channel element 1.4 is not allocated
> Error while decoding stream #0:1: Invalid data found when processing input
> [aac @ 0x7fe65c00d200] channel element 1.0 is not allocated
> Error while decoding stream #0:1: Invalid data found when processing input
> [aac @ 0x7fe65c00d200] channel element 1.4 is not allocated
> Error while decoding stream #0:1: Invalid data found when processing input
> Error while decoding stream #0:0: Invalid data found when processing input
> [h264 @ 0x7fe65c013a00] No start code is found.
> [h264 @ 0x7fe65c013a00] Error splitting the input into NAL units.
> Error while decoding stream #0:0: Invalid data found when processing input
> [h264 @ 0x7fe65c01d200] No start code is found.
> [h264 @ 0x7fe65c01d200] Error splitting the input into NAL units.
> [aac @ 0x7fe65c00d200] channel element 1.0 is not allocated
> Error while decoding stream #0:1: Invalid data found when processing input
> Error while decoding stream #0:0: Invalid data found when processing input
> [h264 @ 0x7fe65c01d800] No start code is found.
> 
> full report here:  
> https://gist.github.com/daBee/e5faa3f8f522c2c4e5927ed82887f882
> 
> 
> I just ran a test where the 10th clip went silent and froze, yet the QuickTime Player kept progressing.  The next clip came in with no sound, and the rest of the video progressed fine with no sound until much later.  Individual clips work just fine.  
> 
> I’m not sure what’s happening.  I was assuming it was a simple glue, but apparently it’s not happy with stuff.  This section above was a grab from the middle.  
> 
> Any advice appreciated how I can fix this.  Cheers






On Oct 6:


> Hi folks.  I’m performing a multiple-“.mov” concat which is resulting in delayed audio in the final output .mp4.  
> 
> I’m rendering temp MPEG-2 .ts files, then concatenating all of those into a final MP4 file.  
> 
> The final video has a lagging video, which eventually catches up by the end of the video.  
> 
> Is there a way I can fully encapsulate the intermediate files so that there is spot-on audio into the intermediate files, and then into the final MP4?  Is MP4 the file type I should be sending to?  I can re-translate it post-concat, if need be.  
> 
> My STDOUT is here:  
> https://gist.github.com/daBee/d4052da2a5be7a8ee121ae70eafebefe
>  
> Furthermore…
> 
> ffmpeg -y -i #{ item } -c copy -bsf:v h264_mp4toannexb -f mpegts int#{ counter }.ts
> 
> …and… 
> 
> ffmpeg -y -i \"concat:#{ couple }\" -bsf:a aac_adtstoasc #{ d }/final.mp4
> 
> d: original source directory path
> item: original .mov source file
> counter: auto-increment integer
> couple: string of intermediate files piped together:  
> 
> concat:int1.ts|int2.ts|int3.ts|int4.ts|int5.ts|int6.ts|int7.ts|int8.ts|int9.ts|int10.ts|int11.ts|int12.ts|int13.ts|int14.ts|int15.ts|int16.ts|int17.ts|int18.ts|int19.ts|int20.ts|int21.ts|int22.ts|int23.ts|int24.ts|int25.ts|int26.ts|int27.ts|int28.ts|int29.ts|int30.ts|int31.ts|int32.ts|int33.ts|int34.ts|int35.ts|int36.ts|int37.ts|int38.ts|int39.ts|int40.ts|int41.ts|int42.ts|int43.ts|int44.ts|int45.ts|int46.ts|int47.ts|int48.ts|int49.ts|int50.ts|int51.ts|int52.ts|int53.ts|int54.ts|int55.ts|int56.ts|int57.ts|int58.ts|int59.ts|int60.ts|int61.ts|int62.ts|int63.ts|int64.ts|int65.ts|int66.ts|int67.ts|int68.ts|int69.ts|int70.ts



Nothing heard.  

In any case, even if I have a recent buggy version for an outdated FFMPEG for an older machine, all I’m asking is the approach for performing a best-outcome concat.  





> On Oct 17, 2018, at 8:59 AM, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
> 
> Command line and complete, uncut console output missing,
> please remember that only current FFmpeg git head is
> supported here.


_____________
Rich in Toronto @ VP