[FFmpeg-user] Approach to Fully Lossless Concat

[Paul B Mahol]

On 10/17/18, VP Lists <lists at viaduct-productions.com> wrote:
> 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.

Are you using concat protocol? Better use concat demuxer.

>
>
>
>
>
>> 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
>
>
>
>
>
>
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