Anyway to set custom-name using "-segment-timeline"

[Jain2098]

I am using Python on Windows 11 with Stable version of GPAC. I am having these warning continuously through out the code.:

[Dasher] First CTS 61560 in segment 12 drifting by -4.44 (more than half a segment duration) from segment time, consider reencoding or using segment timeline
[Dasher] First CTS 32048 in segment 7 drifting by -3.952 (more than half a segment duration) from segment time, consider reencoding or using segment timeline
[Dasher] First CTS 38533 in segment 8 drifting by -3.467 (more than half a segment duration) from segment time, consider reencoding or using segment timeline

If I use "-segment-timeline" I can't use "-segment-name" with custom name format. Using "-segment-name", makes the above error gone. Also when I play it via VLC Player I see this error at beginning of start of the video:

mp4 warning: elst box found
mp4 warning: no chunk defined
mp4 warning: STTS table of 0 entries
mp4 warning: STTS table of 24 entries
mp4 warning: that media doesn't look interleaved, will need to seek
mp4 info: Fragment sequence discontinuity detected 1 != 0
mp4 warning: no chunk defined
mp4 warning: STTS table of 0 entries
mp4 warning: STTS table of 24 entries
mp4 warning: that media doesn't look interleaved, will need to seek
mp4 info: Fragment sequence discontinuity detected 1 != 0
mp4 warning: elst box found
mp4 warning: no chunk defined
mp4 warning: STTS table of 0 entries
mp4 warning: STTS table of 24 entries
mp4 warning: that media doesn't look interleaved, will need to seek
mp4 info: Fragment sequence discontinuity detected 1 != 0
avcodec info: Using D3D11VA (Intel(R) HD Graphics 620, vendor 8086(Intel), device 5916, revision 2) for hardware decoding
faad warning: decoded zero sample

#Update
Now I am trying to ReEncode every video:
Will below config would be best for Mp4Box dash

video_bitrate = {480: "350k", 720: "900k", 1080: "1800k"}
audio_bitrate = {480: "96k", 720: "128k", 1080: "192k"}
key_int = int(self.video_avg_frame_rate * 3) # Calculate keyint for 6-second segments
Video Command:

[
                os.path.join(BIN_DIR, "ffmpeg"),
                "-i", self.original_file_location,
                "-c:v", "libx264",
                "-preset", "slow",
                "-crf", "23",
                "-b:v", video_bitrate.get(res, "500k"),
                "-an",  # No Audio
                "-sn",  # No Subtitle
                "-movflags", "faststart",
                "-x264opts", f"keyint={key_int}:min-keyint={key_int}:no-scenecut",
                "-vf", f"scale=-2:{res}",
                "-f", "mp4",
                "-y",
                output_video
]

Audio:

[
                    os.path.join(BIN_DIR, "ffmpeg"),
                    "-i", self.original_file_location,
                    "-map", f"0:{track['id']}",
                    "-c:a", "aac",
                    "-b:a", audio_bitrate.get(res, '96k'),
                    "-ac", "2",
                    "-t", str(video_duration_TEMP),
                    "-shortest",
                    "-ar", "48000",
                    "-movflags", "faststart",
                    "-profile:a", "aac_low", 
                    "-strict", "experimental",
                    "-y",
                    output_audio
]

Subtitles:

[
                        os.path.join(BIN_DIR, "ffmpeg"),
                        "-i", self.original_file_location,
                        "-map", f"0:{track['id']}",
                        "-c:s", "srt",
                        "-t", str(video_duration_TEMP),
                        "-y",
                        output_subtitle
]

I am having another issue that:, while inspecting chunks, I get this warning:

mp4box -info .\vid0_1.m4s
[iso file] Movie fragment but no moov (yet) - possibly broken parsing!
File is a segment - 1 movie fragments - Brand msdh (version 0):
Fragment #1 size 1549569 (moof 2088) {TKID 1 TFDT 608560}

I tried everything but I am unable to add this moov details into segments. Is it okay that segment not to have moov info?

Here is the config that i am using. Please guide me if anything wrong and what improvement i can do. I tried to use onDemand but it won't create chunks so I currently stick to main profile as using chunks is mainly needed.
split_command:
[
'C:/Program Files/GPAC/mp4box.exe',
'-dash', '6000',
'-frag', '6000',
'-rap',
'-bound',
'-profile', 'main',
'-segment-ext', 'm4s',
'-segment-name', '$RepresentationID$_$Number$',
'-out', '/manifest.mpd',
'-url-template',
'c9757e84318e.mkv#video:id=vid0:lang=und',
'c9757e84318e.mkv#1:id=aud0:lang=hin',
'c9757e84318e.mkv#2:id=sub0:lang=eng',
'c9757e84318e.mkv#3:id=sub1:lang=eng'
]

Any kind of help is greatly appreciated.
Thank You. 😊

[Jain2098]

Post content updated as Now I am doing Re-Encode to fix all unsupported codec issues in browser.

[rbouqueau]

For the error messages I would have suspected that your sync points are not regular. However your FFmpeg command-line seems fine. Can you upload an 'output_video' file here?

 [iso file] Movie fragment but no moov (yet) - possibly broken parsing!

That's because the 'moov' box is contained in the init segment. Add the -initseg=INIT_FILENAME to your command-line.

[Jain2098]

I am having weird issue, no matter how I encode with FFMPEG, Mp4Box keep giving error due to audio.
This file is a .mkv file with dual audio file with one subtitle. As in testing I am Re-encoding the file as 360p using FFMPEG. mkv to mp4 with all audio conversion to aac and subtitle to vtt format.

File Link: https://gofile.io/d/PHZTV7

Original File:

Input #0, matroska,webm, from '.\898b4ad5-a8a0-44d6-a6eb-d8d9fc44db3a.mkv':
Metadata:
title : DEVENU [OMNiRiPs]
ENCODER : Lavf61.3.104
Duration: 00:04:09.86, start: 0.000000, bitrate: 1555 kb/s
Stream #0:0(eng): Video: h264 (High), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 1k tbn (default)
Metadata:
title : DEVENU [x264]
BPS : 1293485
NUMBER_OF_FRAMES: 5995
NUMBER_OF_BYTES : 40387779
_STATISTICS_WRITING_APP: mkvmerge v77.0 ('Elemental') 64-bit
_STATISTICS_WRITING_DATE_UTC: 2023-07-01 17:15:20
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
DURATION : 00:04:09.791000000
Stream #0:1(eng): Audio: eac3, 48000 Hz, 5.1(side), fltp, 192 kb/s (default)
Metadata:
title : DEVENU [DD+ 5.1 - 192kbps]
BPS : 192000
NUMBER_OF_FRAMES: 7807
NUMBER_OF_BYTES : 5995776
_STATISTICS_WRITING_APP: mkvmerge v77.0 ('Elemental') 64-bit
_STATISTICS_WRITING_DATE_UTC: 2023-07-01 17:15:20
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
DURATION : 00:04:09.824000000
Stream #0:2(eng): Audio: aac (LC), 48000 Hz, stereo, fltp (default)
Metadata:
title : DEVENU [AAC 2.0 - 64kbps]
BPS : 64000
NUMBER_OF_FRAMES: 11712
NUMBER_OF_BYTES : 1998849
_STATISTICS_WRITING_APP: mkvmerge v77.0 ('Elemental') 64-bit
_STATISTICS_WRITING_DATE_UTC: 2023-07-01 17:15:20
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
DURATION : 00:04:09.855000000
Stream #0:3(eng): Subtitle: subrip (default)
Metadata:
title : DEVENU
BPS : 28
NUMBER_OF_FRAMES: 50
NUMBER_OF_BYTES : 734
_STATISTICS_WRITING_APP: mkvmerge v77.0 ('Elemental') 64-bit
_STATISTICS_WRITING_DATE_UTC: 2023-07-01 17:15:20
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
DURATION : 00:03:27.417000000

FFMPEG Command

video:
['ffmpeg', '-i', 'original_file.mkv', '-c:v', 'libx264', '-preset', 'slow', '-crf', '23', '-b:v', '500k', '-an', '-sn', '-movflags', 'faststart', '-x264opts', 'keyint=72:min-keyint=72:no-scenecut', '-vf', 'scale=-2:360', '-f', 'mp4', '-y', 'output_file.mp4']

Audio:
['ffmpeg', '-i', 'original_file.mkv', '-map', '0:1', '-c:a', 'aac', '-b:a', '96k', '-ac', '2', '-shortest', '-ar', '48000', '-y', '1.eng.aac']
also used used "-t" "video_duration" but same issue.

when checking Audio using FFPROBE After conversion, its like this:

2.eng.aac':
Duration: 01:21:11.94, bitrate: 5 kb/s
Stream #0:0: Audio: aac (LC), 48000 Hz, stereo, fltp, 5 kb/s

1.eng.aac':
Duration: 00:07:12.98, bitrate: 57 kb/s
Stream #0:0: Audio: aac (LC), 48000 Hz, stereo, fltp, 57 kb/s

Duration is invalid but when played it play exact the video length.

Mp4Box Command:

[
MP4BOX_PATH,
"-dash", "3000",
"-frag", "3000",
"-profile", "main",
"-segment-name", segment_path_template,
"-rap",
"-bound",
"-segment-ext", "null",
"-segment-timeline",
"-out", manifest_name,
"-url-template",
video_command
] + audio_commands + subtitle_commands

Error Code:

2024-06-03 05:59:51,389 - DEBUG - result: False
2024-06-03 05:59:51,389 - ERROR - Error during video split: 'bool' object has no attribute 'returncode'
Error: Command '['C:/Program Files/GPAC/mp4box.exe', '-dash', '3000', '-frag', '3000', '-profile', 'main', '-segment-name', '$RepresentationID$_$Number$', '-rap', '-bound', '-segment-ext', 'null', '-segment-timeline', '-out', 'D:/FastApi Projects/dash/uploads/processed/a7866ede-7a95-4ff8-af6d-6b040a93dbf3/360/manifest.mpd', '-url-template', 'D:/FastApi Projects/dash/uploads/encoded/a7866ede-7a95-4ff8-af6d-6b040a93dbf3/360/video/360.mp4:id=vid0:role=main:lang=eng', 'D:/FastApi Projects/dash/uploads/encoded/a7866ede-7a95-4ff8-af6d-6b040a93dbf3/360/audio/1.eng.aac:id=aud0:role=main:lang=eng', 'D:/FastApi Projects/dash/uploads/encoded/a7866ede-7a95-4ff8-af6d-6b040a93dbf3/360/audio/2.eng.aac:id=aud1:role=main:lang=eng']' returned non-zero exit status 3221225477.

[rbouqueau]

This is unreadable. It looks like you dumped some Python into the issue.

I can't see the MP4Box error in here. Could you post the full log please? Or confirm which error you see?

Btw I confirm something is indeed incorrect in GPAC with your input file. The DASHing seems to timeout and I tried to inspect it to a limited avail:

$ MP4Box -info testing_dual_audio.mkv -logs=all@warning
[FFDmx] No PTS for packet on stream 4
Filter ffdmx failed to setup: Feature Not Supported
[Importer] Error probing testing_dual_audio.mkv
Error probing file testing_dual_audio.mkv: Feature Not Supported

        Error: Feature Not Supported

and

$ gpac -i testing_dual_audio.mkv inspect
[FFDmx] No PTS for packet on stream 4
[RFC6381] Incomplete upstream-filter 'colr' information. Ignoring.
PID 5 video duration 04:09.856 timescale 90000 1765x995 fps 90000 SAR 1/1 codec mp4v.6D PNG Image
[RFC6381] Incomplete upstream-filter 'colr' information. Ignoring.
PID 2 audio language "eng" duration 04:09.856 timescale 1000 48000 Hz 3/2.1 chan 192 kbps codec ec-3 Enhanced AC3 Audio
[RFC6381] Incomplete upstream-filter 'colr' information. Ignoring.
PID 3 audio language "eng" duration 04:09.856 timescale 1000 48000 Hz stereo chan codec mp4a.40.2 AAC LC (aot=2 implicit)
PID 1 video language "eng" duration 04:09.856 timescale 1000 delay -82 1280x720 fps 24 SAR 1/1 codec avc1.640028 AVC|H264 PL High@4 YUV 4:2:0 8 bpp
Filter txtin failed to setup: Feature Not Supported
session last connect error Feature Not Supported

[jeanlf]

The setup failure is a recent regression on mkv file using srt , fixed in master

The dash messages came from a broken signaling of PID delay in ffdmx resulting in the first GOP being less than 2sec in presentation time, now also fixed.

If I use "-segment-timeline" I can't use "-segment-name" with custom name format.

These are unrelated, probably a mistake in your command line. Could you post it ?

[jeanlf]

No follow-up on side question and main issue fixed, closing. If you can reproduce your segment naming problem, please open a new issue.