Bug: Some arguments not implemented UDP TS consumer

[dedicatedbroadcastsolutions]

Observed Behavior

I tried to create the simplest udp streaming example I could for testing purposes.

With libx264 UDP the udp streaming output works (config file form)
<ffmpeg> <path>udp://localhost:2037?pkt_size=1316</path> <args>-filter:v format=pix_fmts=yuv420p -codec:v libx264 -bufsize:v 9M -minrate:v 9M -maxrate:v 9M -codec:a ac3 -filter:a pan=stereo|c0=c0|c1=c1 -b:a 128k -format mpegts</args> </ffmpeg>

With mpeg2video it throws errors even though this should work fine in ffmpeg directly.

<ffmpeg>
					<path>udp://localhost:2037?pkt_size=1316</path>
					<args>-filter:v format=pix_fmts=yuv420p -codec:v mpeg2video -bufsize:v 9M -minrate:v 9M -maxrate:v 9M -codec:a ac3 -filter:a pan=stereo|c0=c0|c1=c1 -b:a 128k -format mpegts</args>
</ffmpeg>

F:\RLB\CasparCG\casparcg-server-v2.3.3-lts-stable>casparcg
[2025-06-22 01:41:34.959111] [0x00009394] [error]    0# 0x00007FF66A15B906 in casparcg
 1# 0x00007FF66A16F080 in casparcg
 2# raise in ucrtbase
 3# abort in ucrtbase
 4# 0x00007FF66A16F55E in casparcg
 5# terminate in ucrtbase
 6# is_exception_typeof in VCRUNTIME140
 7# is_exception_typeof in VCRUNTIME140
 8# _CxxFrameHandler3 in VCRUNTIME140
 9# _chkstk in ntdll
10# RtlRaiseException in ntdll
11# RtlRaiseException in ntdll
12# RaiseException in KERNELBASE
13# CxxThrowException in VCRUNTIME140
14# 0x00007FF66A1FFB6F in casparcg
15# 0x00007FF66A401D04 in casparcg
16# 0x00007FF66A402E2A in casparcg
17# 0x00007FF66A414C37 in casparcg
18# 0x00007FF66A40FC97 in casparcg
19# 0x00007FF66A24DA20 in casparcg
20# 0x00007FF66A24ED94 in casparcg
21# 0x00007FF66A2BBE05 in casparcg
22# 0x00007FF66A2AD854 in casparcg
23# 0x00007FF66A2B2EFC in casparcg
24# 0x00007FF66A2A52CF in casparcg
25# 0x00007FF66A2AC0F7 in casparcg
26# 0x00007FF66A262474 in casparcg
27# 0x00007FF66A2628B8 in casparcg
28# 0x00007FF66A2D20A4 in casparcg
29# 0x00007FF66A2D2FEF in casparcg
30# 0x00007FF66A2D2497 in casparcg
31# 0x00007FF66A2D2797 in casparcg
32# 0x00007FF66A18DA82 in casparcg
33# 0x00007FF66A2C67D3 in casparcg
34# 0x00007FF66A2C69BE in casparcg
35# 0x00007FF66A2C70C4 in casparcg
36# 0x00007FF66A2CDCF6 in casparcg
37# 0x00007FF66A164258 in casparcg
38# 0x00007FF66A16DBED in casparcg
39# 0x00007FF66A17111D in casparcg
40# 0x00007FF66A5A6A88 in casparcg
41# BaseThreadInitThunk in KERNEL32
42# RtlUserThreadStart in ntdll

Type "q" to close application.
Logging [info] or higher severity to log/

[2025-06-22 01:41:34.985] [info]    ############################################################################
[2025-06-22 01:41:34.985] [info]    CasparCG Server is distributed by the Swedish Broadcasting Corporation (SVT)
[2025-06-22 01:41:34.985] [info]    under the GNU General Public License GPLv3 or higher.
[2025-06-22 01:41:34.985] [info]    Please see LICENSE.TXT for details.
[2025-06-22 01:41:34.985] [info]    http://www.casparcg.com/
[2025-06-22 01:41:34.985] [info]    ############################################################################
[2025-06-22 01:41:34.985] [info]    Starting CasparCG Video and Graphics Playout Server 2.3.2 4de6d18f Dev
[2025-06-22 01:41:35.301] [info]    Initializing OpenGL Device.
[2025-06-22 01:41:35.302] [info]    Initialized OpenGL 4.5.0 NVIDIA 553.35 NVIDIA Corporation
[2025-06-22 01:41:35.302] [info]    Initialized image module.
[2025-06-22 01:41:35.306] [info]    Initialized ffmpeg module.
[2025-06-22 01:41:35.306] [info]    Initialized oal module.
[2025-06-22 01:41:35.306] [info]    Initialized decklink module.
[2025-06-22 01:4[0622/014135.346:ERROR:gpu_process_transport_factory.cc(990)] Lost UI shared context.
1:35.306] [info]    Initialized screen module.
[2025-06-22 01:41:35.306] [info]    Initialized newtek module.
[2025-06-22 01:41:35.399] [info]    Initialized html module.
[2025-06-22 01:41:35.400] [info]    Flash support is disabled
[2025-06-22 01:41:35.400] [info]    Initialized flash module.
[2025-06-22 01:41:35.403] [info]    Initialized bluefish module.
[2025-06-22 01:41:35.403] [info]    "F:/RLB\CasparCG\casparcg-server-v2.3.3-lts-stable\casparcg.config":
[2025-06-22 01:41:35.403] [info]    -----------------------------------------
[2025-06-22 01:41:35.403] [info]    <?xml version="1.0" encoding="utf-8"?>
[2025-06-22 01:41:35.403] [info]    <configuration>
[2025-06-22 01:41:35.403] [info]       <paths>
[2025-06-22 01:41:35.403] [info]          <media-path>Z:\Playout\Media</media-path>
[2025-06-22 01:41:35.403] [info]          <log-path>log/</log-path>
[2025-06-22 01:41:35.403] [info]          <data-path>data/</data-path>
[2025-06-22 01:41:35.403] [info]          <template-path>Z:\Playout\Templates</template-path>
[2025-06-22 01:41:35.403] [info]       </paths>
[2025-06-22 01:41:35.403] [info]       <lock-clear-phrase>secret</lock-clear-phrase>
[2025-06-22 01:41:35.403] [info]       <channels>
[2025-06-22 01:41:35.403] [info]          <channel>
[2025-06-22 01:41:35.403] [info]             <video-mode>1080i5994</video-mode>
[2025-06-22 01:41:35.403] [info]             <consumers>
[2025-06-22 01:41:35.403] [info]                <decklink>
[2025-06-22 01:41:35.403] [info]                   <device>1</device>
[2025-06-22 01:41:35.403] [info]                   <key-device>1</key-device>
[2025-06-22 01:41:35.403] [info]                   <embedded-audio>true</embedded-audio>
[2025-06-22 01:41:35.403] [info]                   <latency>normal</latency>
[2025-06-22 01:41:35.403] [info]                   <keyer>internal</keyer>
[2025-06-22 01:41:35.403] [info]                   <key-only>false</key-only>
[2025-06-22 01:41:35.403] [info]                   <buffer-depth>3</buffer-depth>
[2025-06-22 01:41:35.403] [info]                </decklink>
[2025-06-22 01:41:35.403] [info]                <ffmpeg>
[2025-06-22 01:41:35.403] [info]                   <path>udp://localhost:2037?pkt_size=1316</path>
[2025-06-22 01:41:35.403] [info]                   <args>-filter:v format=pix_fmts=yuv420p -codec:v mpeg2video -bufsize:v 9M -minrate:v 9M -maxrate:v 9M -codec:a ac3 -filter:a pan=stereo|c0=c0|c1=c1 -b:a 128k -format mpegts</args>
[2025-06-22 01:41:35.403] [info]                </ffmpeg>
[2025-06-22 01:41:35.403] [info]             </consumers>
[2025-06-22 01:41:35.403] [info]          </channel>
[2025-06-22 01:41:35.403] [info]       </channels>
[2025-06-22 01:41:35.403] [info]       <controllers>
[2025-06-22 01:41:35.403] [info]          <tcp>
[2025-06-22 01:41:35.403] [info]             <port>5250</port>
[2025-06-22 01:41:35.403] [info]             <protocol>AMCP</protocol>
[2025-06-22 01:41:35.403] [info]          </tcp>
[2025-06-22 01:41:35.403] [info]       </controllers>
[2025-06-22 01:41:35.403] [info]       <amcp>
[2025-06-22 01:41:35.403] [info]          <media-server>
[2025-06-22 01:41:35.403] [info]             <host>localhost</host>
[2025-06-22 01:41:35.403] [info]             <port>8000</port>
[2025-06-22 01:41:35.403] [info]          </media-server>
[2025-06-22 01:41:35.403] [info]       </amcp>
[2025-06-22 01:41:35.403] [info]    </configuration>
[2025-06-22 01:41:35.403] [info]    -----------------------------------------
[2025-06-22 01:41:35.477] [info]    Initialized OpenGL Accelerated GPU Image Mixer for channel 1
[2025-06-22 01:41:35.478] [info]    video_channel[1|1080i5994] Successfully Initialized.
[2025-06-22 01:41:35.487] [info]    DeckLink SDI 4K [1-1|1080i5994] Enabled embedded-audio.
[2025-06-22 01:41:35.487] [info]    DeckLink SDI 4K [1-1|1080i5994] Disabled low-latency mode.
[2025-06-22 01:41:35.487] [info]    DeckLink SDI 4K [1-1|1080i5994] Enabled internal keyer.
[2025-06-22 01:41:35.491] [info]    DeckLink SDI 4K [1-1|1080i5994] Initialized.
[2025-06-22 01:41:35.492] [info]    ffmpeg[udp://localhost:2037?pkt_size=1316] Initialized.
[2025-06-22 01:41:35.492] [info]    Initialized channels.
[2025-06-22 01:41:35.493] [info]    Initialized controllers.
[2025-06-22 01:41:35.493] [info]    Initialized osc.
[2025-06-22 01:41:35.493] [error]   [ffmpeg] [mpeg2video @ 00000265FFFA7AC0] bitrate below min bitrate
[2025-06-22 01:41:35.493] [error]
[2025-06-22 01:41:35.556] [info]    DeckLink SDI 4K [1-1|1080i5994] Reference signal: not detected.
[2025-06-22 01:41:35.804] [info]    async_event_server[:5250] Accepted connection from 127.0.0.1 (1 connections).
[2025-06-22 01:41:35.804] [info]    async_event_server[:5250] Accepted connection from 127.0.0.1 (2 connections).
[2025-06-22 01:41:35.806] [info]    Received message from 127.0.0.1: REQ sdwtlba CLS\r\n
[2025-06-22 01:41:35.806] [info]    Received message from 127.0.0.1: REQ r7eejd7 INFO\r\n
[2025-06-22 01:41:35.505] [error]   Exception: C:\Program Files (x86)\Jenkins\workspace\casparcg-server-dep\master\src\modules\ffmpeg\consumer\ffmpeg_consumer.cpp(305): Throw in function auto __cdecl caspar::ffmpeg::Stream::{ctor}::<lambda_185aeed21664c9a2fdb8a20d8dc8b169>::operator ()(void) const
[2025-06-22 01:41:35.505] [error]   Dynamic exception type: class boost::exception_detail::clone_impl<struct caspar::ffmpeg::ffmpeg_error_t>
[2025-06-22 01:41:35.505] [error]   [struct boost::errinfo_api_function_ * __ptr64] = avcodec_open2(enc.get(), codec, &dict)
[2025-06-22 01:41:35.505] [error]   [struct boost::errinfo_errno_ * __ptr64] = 1, "Operation not permitted"
[2025-06-22 01:41:35.505] [error]   [struct caspar::ffmpeg::tag_ffmpeg_errn_info * __ptr64] = -1
[2025-06-22 01:41:35.505] [error]   [struct caspar::tag_stacktrace_info * __ptr64] =  0# 0x00007FF66A16A37E in casparcg
[2025-06-22 01:41:35.505] [error]    1# 0x00007FF66A199690 in casparcg
[2025-06-22 01:41:35.505] [error]    2# 0x00007FF66A37060C in casparcg
[2025-06-22 01:41:35.505] [error]    3# 0x00007FF66A364E0B in casparcg
[2025-06-22 01:41:35.505] [error]    4# 0x00007FF66A376B60 in casparcg
[2025-06-22 01:41:35.505] [error]    5# 0x00007FF66A37B730 in casparcg
[2025-06-22 01:41:35.505] [error]    6# 0x00007FF66A1650B9 in casparcg
[2025-06-22 01:41:35.505] [error]    7# configthreadlocale in ucrtbase
[2025-06-22 01:41:35.505] [error]    8# BaseThreadInitThunk in KERNEL32
[2025-06-22 01:41:35.505] [error]    9# RtlUserThreadStart in ntdll
[2025-06-22 01:41:35.505] [error]
[2025-06-22 01:41:35.505] [error]
[2025-06-22 01:41:35.505] [error]    0# 0x00007FF66A16A37E in casparcg
[2025-06-22 01:41:35.505] [error]    1# 0x00007FF66A169CAF in casparcg
[2025-06-22 01:41:35.505] [error]    2# 0x00007FF66A6962A7 in casparcg
[2025-06-22 01:41:35.505] [error]    3# _CxxFrameHandler3 in VCRUNTIME140
[2025-06-22 01:41:35.505] [error]    4# is_exception_typeof in VCRUNTIME140
[2025-06-22 01:41:35.505] [error]    5# RtlCaptureContext2 in ntdll
[2025-06-22 01:41:35.505] [error]    6# 0x00007FF66A26C14D in casparcg
[2025-06-22 01:41:35.505] [error]    7# 0x00007FF66A26CBD5 in casparcg
[2025-06-22 01:41:35.505] [error]    8# 0x00007FF66A263997 in casparcg
[2025-06-22 01:41:35.505] [error]    9# 0x00007FF66A2666E0 in casparcg
[2025-06-22 01:41:35.505] [error]   10# 0x00007FF66A1650B9 in casparcg
[2025-06-22 01:41:35.505] [error]   11# configthreadlocale in ucrtbase
[2025-06-22 01:41:35.505] [error]   12# BaseThreadInitThunk in KERNEL32
[2025-06-22 01:41:35.505] [error]   13# RtlUserThreadStart in ntdll
[2025-06-22 01:41:35.505] [error]
[2025-06-22 01:41:36.541] [error]   Exception: C:\Program Files (x86)\Jenkins\workspace\casparcg-server-dep\master\src\modules\ffmpeg\consumer\ffmpeg_consumer.cpp(305): Throw in function auto __cdecl caspar::ffmpeg::Stream::{ctor}::<lambda_185aeed21664c9a2fdb8a20d8dc8b169>::operator ()(void) const
[2025-06-22 01:41:36.541] [error]   Dynamic exception type: class boost::exception_detail::clone_impl<struct caspar::ffmpeg::ffmpeg_error_t>
[2025-06-22 01:41:36.541] [error]   [struct boost::errinfo_api_function_ * __ptr64] = avcodec_open2(enc.get(), codec, &dict)
[2025-06-22 01:41:36.541] [error]   [struct boost::errinfo_errno_ * __ptr64] = 1, "Operation not permitted"
[2025-06-22 01:41:36.541] [error]   [struct caspar::ffmpeg::tag_ffmpeg_errn_info * __ptr64] = -1
[2025-06-22 01:41:36.541] [error]   [struct caspar::tag_stacktrace_info * __ptr64] =  0# 0x00007FF66A16A37E in casparcg
[2025-06-22 01:41:36.541] [error]    1# 0x00007FF66A199690 in casparcg
[2025-06-22 01:41:36.541] [error]    2# 0x00007FF66A37060C in casparcg
[2025-06-22 01:41:36.541] [error]    3# 0x00007FF66A364E0B in casparcg
[2025-06-22 01:41:36.541] [error]    4# 0x00007FF66A376B60 in casparcg
[2025-06-22 01:41:36.541] [error]    5# 0x00007FF66A37B730 in casparcg
[2025-06-22 01:41:36.541] [error]    6# 0x00007FF66A1650B9 in casparcg
[2025-06-22 01:41:36.541] [error]    7# configthreadlocale in ucrtbase
[2025-06-22 01:41:36.541] [error]    8# BaseThreadInitThunk in KERNEL32
[2025-06-22 01:41:36.541] [error]    9# RtlUserThreadStart in ntdll
[2025-06-22 01:41:36.541] [error]
[2025-06-22 01:41:36.541] [error]
[2025-06-22 01:41:36.541] [error]    0# 0x00007FF66A16A37E in casparcg
[2025-06-22 01:41:36.541] [error]    1# 0x00007FF66A169CAF in casparcg
[2025-06-22 01:41:36.541] [error]    2# 0x00007FF66A6962A7 in casparcg
[2025-06-22 01:41:36.541] [error]    3# _CxxFrameHandler3 in VCRUNTIME140
[2025-06-22 01:41:36.541] [error]    4# is_exception_typeof in VCRUNTIME140
[2025-06-22 01:41:36.541] [error]    5# RtlCaptureContext2 in ntdll
[2025-06-22 01:41:36.541] [error]    6# 0x00007FF66A26C14D in casparcg
[2025-06-22 01:41:36.541] [error]    7# 0x00007FF66A26CBD5 in casparcg
[2025-06-22 01:41:36.541] [error]    8# 0x00007FF66A263997 in casparcg
[2025-06-22 01:41:36.541] [error]    9# 0x00007FF66A2666E0 in casparcg
[2025-06-22 01:41:36.541] [error]   10# 0x00007FF66A1650B9 in casparcg
[2025-06-22 01:41:36.541] [error]   11# configthreadlocale in ucrtbase
[2025-06-22 01:41:36.541] [error]   12# BaseThreadInitThunk in KERNEL32
[2025-06-22 01:41:36.541] [error]   13# RtlUserThreadStart in ntdll`

Expected behaviour

I would expect it to output mpeg2video with default settings other than what is specified.

Steps to reproduce

1.Add the following to consumers definition in config file

<ffmpeg>
					<path>udp://localhost:2037?pkt_size=1316</path>
					<args>-filter:v format=pix_fmts=yuv420p -codec:v mpeg2video -bufsize:v 9M -minrate:v 9M -maxrate:v 9M -codec:a ac3 -filter:a pan=stereo|c0=c0|c1=c1 -b:a 128k -format mpegts</args>
</ffmpeg>

2. FFmpeg consumer refuses to run

Environment

• Server version: 2.3.3
• Operating system: Windows 10

If needed, I can also test on master on linux if anything has changed since 2.3.3 for this.

[dedicatedbroadcastsolutions]

After testing on linux from a development branch based on master, I discovered that it doesn't like having the minrate and maxrate variables without setting the bit rate. I now have a command that streams video but no matter what I do the quality seems to be less than the equivilant command in ffmpeg directly. This holds true for 2.3.3 on windows also.

[dedicatedbroadcastsolutions]

Using a simplified test:

<ffmpeg> <path>udp://localhost:2037?pkt_size=1316</path> <args>-filter:v scale=1920x1080,fps=30000/1001,format=pix_fmts=yuv420p -codec:v mpeg2video -interlaced_scan 1 -dc 10 -flags +ilme+ildct -profile:v 1 -level:v 4 -b:v 9.5M -minrate 9.5M -maxrate 9.5M -bufsize 9.5M -bf 0 -codec:a ac3 -ar 48000 -ac 2 -filter:a pan=stereo|c0=c0|c1=c1 -b:a 192k -format mpegts</args> </ffmpeg>

It appears like some important mpeg2 options are not processed.

[2025-06-22 12:41:13.216] [info] [2025-06-22 12:41:13.220] [warning] ffmpeg[udp://localhost:2037?pkt_size=1316] Unused option ac=2 [2025-06-22 12:41:13.220] [warning] ffmpeg[udp://localhost:2037?pkt_size=1316] Unused option ar=48000 [2025-06-22 12:41:13.220] [warning] ffmpeg[udp://localhost:2037?pkt_size=1316] Unused option bf=0 [2025-06-22 12:41:13.220] [warning] ffmpeg[udp://localhost:2037?pkt_size=1316] Unused option bufsize=9.5M [2025-06-22 12:41:13.220] [warning] ffmpeg[udp://localhost:2037?pkt_size=1316] Unused option dc=10 [2025-06-22 12:41:13.220] [warning] ffmpeg[udp://localhost:2037?pkt_size=1316] Unused option flags=+ilme+ildct [2025-06-22 12:41:13.220] [warning] ffmpeg[udp://localhost:2037?pkt_size=1316] Unused option interlaced_scan=1 [2025-06-22 12:41:13.220] [warning] ffmpeg[udp://localhost:2037?pkt_size=1316] Unused option maxrate=9.5M [2025-06-22 12:41:13.220] [warning] ffmpeg[udp://localhost:2037?pkt_size=1316] Unused option minrate=9.5M

Here are the arguments I normally use when transcoding files.

-y  -i "<SourceFileName>"
-f mpegts 
-mpegts_transport_stream_id 10131 -metadata service_provider="Network Name" 
-metadata service_name="ChName" -mpegts_service_id 1 -tables_version 10

-vcodec mpeg2video -flags +ilme+ildct
-vf fps=30000/1001,scale=1920x1080 -pix_fmt yuv420p
-muxrate 19000k -g 15
-b:v 12000k -minrate:v 12000k -maxrate:v 12000k -bufsize 12000k

-mbd bits -lmin QP2LAMBDA
-me_method epzs -bf 2 -b_strategy 1
-trellis 5 -cmp 2 -subcmp 2 -sc_threshold 1000000k

-packetsize 188 -mpegts_pmt_start_pid 0x40 -mpegts_start_pid 0x44 

-c:a ac3 
-ar 48000 -b:a 120k

-threads 0
 "<OutputPath><OutputFileName>.ts"