There are fatal errors in the stream.
I did check it with a script (Linux) :
---
frame= 8 fps=0.0 q=40.0 size= 0kB time=00:00:01.13 bitrate=
0.0kbits/s dup=21 drop=0 speed=12.8x
frame= 26 fps=0.0 q=49.0 size= 0kB time=00:00:01.83 bitrate=
0.0kbits/s dup=21 drop=0 speed=3.07x
frame= 69 fps= 62 q=49.0 size= 0kB time=00:00:03.56 bitrate=
0.0kbits/s dup=21 drop=0 speed=3.18x
frame= 120 fps= 74 q=50.0 size= 0kB time=00:00:05.61 bitrate=
0.0kbits/s dup=21 drop=0 speed=3.46x
frame= 167 fps= 79 q=49.0 size= 0kB time=00:00:07.48 bitrate=
0.0kbits/s dup=21 drop=0 speed=3.52x
frame= 209 fps= 79 q=49.0 size= 0kB time=00:00:09.15 bitrate=
0.0kbits/s dup=21 drop=0 speed=3.46x
frame= 260 fps= 83 q=48.0 size= 368kB time=00:00:11.20 bitrate=
269.2kbits/s dup=21 drop=0 speed=3.56x
frame= 309 fps= 84 q=49.0 size= 368kB time=00:00:13.16 bitrate=
229.1kbits/s dup=21 drop=0 speed=3.58x
frame= 354 fps= 85 q=49.0 size= 368kB time=00:00:14.95 bitrate=
201.6kbits/s dup=21 drop=0 speed=3.58x
[h264 @ 0x574eb5937540] cabac decode of qscale diff failed at 59 6
[h264 @ 0x574eb5937540] error while decoding MB 59 6, bytestream 77049
[h264 @ 0x574eb5937540] concealing 7430 DC, 7430 AC, 7430 MV errors in P
frame
[NULL @ 0x574eb57c9700] Invalid NAL unit size (60897492 > 110161).
[NULL @ 0x574eb57c9700] missing picture in access unit with size 110165
[h264 @ 0x574eb594b680] Invalid NAL unit size (60897492 > 110161).
[h264 @ 0x574eb594b680] Error splitting the input into NAL units.
[NULL @ 0x574eb57c9700] Invalid NAL unit size (-1600997495 > 84591).
[NULL @ 0x574eb57c9700] missing picture in access unit with size 84595
[NULL @ 0x574eb57c9700] Invalid NAL unit size (1695808648 > 76726).
[NULL @ 0x574eb57c9700] missing picture in access unit with size 76730
[h264 @ 0x574eb588c480] Invalid NAL unit size (-1600997495 > 84591).
[h264 @ 0x574eb588c480] Error splitting the input into NAL units.
[h264 @ 0x574eb58a0380] Invalid NAL unit size (1695808648 > 76726).
[h264 @ 0x574eb58a0380] Error splitting the input into NAL units.
[NULL @ 0x574eb57c9700] Invalid NAL unit size (540206825 > 109538).
[NULL @ 0x574eb57c9700] missing picture in access unit with size 109542
[h264 @ 0x574eb57e40c0] Invalid NAL unit size (540206825 > 109538).
[h264 @ 0x574eb57e40c0] Error splitting the input into NAL units.
[NULL @ 0x574eb57c9700] Invalid NAL unit size (1072494654 > 74994).
[NULL @ 0x574eb57c9700] missing picture in access unit with size 74998
[h264 @ 0x574eb5844d00] Invalid NAL unit size (1072494654 > 74994).
[h264 @ 0x574eb5844d00] Error splitting the input into NAL units.
[vist#0:0/h264 @ 0x574eb57cfe00] corrupt decoded frame
[vist#0:0/h264 @ 0x574eb57cfe00] Error submitting packet to decoder:
Invalid data found when processing input
Last message repeated 4 times
frame= 392 fps= 84 q=49.0 size= 368kB time=00:00:16.51 bitrate=
182.6kbits/s dup=26 drop=0 speed=3.53x
frame= 436 fps= 84 q=49.0 size= 368kB time=00:00:18.28 bitrate=
164.9kbits/s dup=26 drop=0 speed=3.53x
---
It leads to the missing audio after this error.
This error must be removed to reencode :
ffmpeg -i "test.mp4" -codec copy -ss 00:00:00.000 -t 00:00:14.950
"test1.mp4"
ffmpeg -i "test.mp4" -codec copy -ss 00:00:16.510 -t 00:00:50.080
"test2.mp4"
But to "cat" the files via ffmpeg, all errors must be removed :
All mp4 files of the directory will be "cat"
ffmpeg -safe 0 -f concat -i <(printf "file '$PWD/%s'\n" *.mp4) -c copy
test.mp4
But with Avidemux you can ad all videos per drag + drop, after all, save
the files in copy mode to one-mp4 and reencode as you wish.
The script to get all errors with the respective timestamp :
#!/bin/bash
while IFS= read -r -d $'\0' video
do
filename=$(basename -- "$video")
filename="${filename%.*}"
ffmpeg -y -i "$video" -vcodec libx264 -crf 51 -preset ultrafast
-acodec copy -f mp4 -movflags frag_keyframe+empty_moov+delay_moov pipe:1
>/dev/null 2>"${filename}.txt" </dev/null
TxtFileName="${filename}.txt"
mystring=${TxtFileName}
echo $mystring
grep -i -n 'error\|duplicate\|failure\|missing\|POCs\|corrupt'
"${TxtFileName}"
echo "Ready"
done < <(find -iregex ".*\.\(mp4\|mkv\|m2ts\|mpg\|ts\)" -print0)
#dos2unix -c mac "${TxtFileName}"
#grep -C 5 -i -n 'error\|duplicate\|failure' "${TxtFileName}"
echo "Ready"
read pause
All video files of the directory will be checked, the result you will
find in the txt-file.
Regards
Am 25.02.25 um 03:02 schrieb BloodMan:
Hello,
wetransfer mp4 test file: https://we.tl/t-BJKuiAHTKQ
The video plays using VLC with glitches and drops (with sound until
the end) but reencoding generally failed (silence after the first drop).
How to survive? How to reencode with "ignore errors like play in vlc"?
I tested many ffmpeg commands and tricks and nothing :/
Anyone?
ps. ffmpeg from git (N-118536-g4ff1d1f3d6) of course
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