Hi Rahul,

Any error information, including that from FFmpeg, would have to be made
available by Niagara, so I can't guide you on how you might access it.

Cheers,
Frank

On 26/11/2024 14:11, Kumar, Rahul via ffmpeg-devel wrote:
> I tried to stream H264 video outside Niagara(attached file) Looks like it is 
> running there:
> 
> Can you pls guide how to capture ffmpeg crash specific logs which we are 
> facing in Niagara?
> 
> 
> Regards,
> Rahul
> 
> 
> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> On Behalf Of Frank 
> Plowman
> Sent: Friday, November 22, 2024 11:37 PM
> To: ffmpeg-devel@ffmpeg.org
> Subject: [External] Re: [FFmpeg-devel] Crash in Niagara Workbench Streaming 
> with FFmpeg 7.0.1+ (H.264 Codec) on Initial Attempts
> 
> WARNING: This message has originated from an External Source. This may be a 
> phishing email that can result in unauthorized access to Honeywell systems. 
> Please use proper judgment and caution when opening attachments, clicking 
> links, scanning QR codes, or responding.
> 
> On 22/11/2024 15:07, Kumar, Rahul via ffmpeg-devel wrote:
>> I am experiencing a crash in Niagara Workbench when streaming video with the 
>> H.264 codec. The crash occurs during the first 3-4 attempts to initialize 
>> the stream but then stabilizes afterward. This issue started after upgrading 
>> FFmpeg from 6.0 to 7.0.1. Updating to 7.1 also did not resolve the issue.
>>
>> Steps to Reproduce:
>> 1. Use Niagara Workbench configured with FFmpeg 7.0.1.
>> 2. Attempt to stream video using the H.264 codec (MaxPro camera driver in 
>> Niagara).
>> 3. Observe crashes during the first few streaming attempts.
>>
>> Observations:
>> * FFmpeg 6.0 works without crashes.
>> * Logs suggest a potential issue in memory allocation or initialization 
>> during early attempts.
>> * Crash logs point to ntdll.dll, which might indicate heap corruption.
>>
>> Environment:
>> * OS: Windows 10 Enterprise
>> * Niagara Workbench Version: [Your Version]
>> * FFmpeg Versions Tested: 6.0(working fine), 7.0.1(crashing),
>> 7.1(crashing)
>>
>> Can you please suggest if any changes between FFmpeg 6.0 and 7.0.1 in the 
>> H.264 codec or JNI integration could cause this behavior? Could this be 
>> related to recently resolved issues like CVE-2024-7055 or others?
>>
>>
>> Regards,
>> Rahul Kumar,
>> Honeywell
> 
> Hi Rahul,
> 
> Are you able to provide steps and/or bitstreams which reproduce this issue 
> using FFmpeg alone and not in Niagara Workbench?  There are a number of 
> reasons using FFmpeg 7.0.1 could crash this software which are not due to 
> bugs in FFmpeg.  Most notably, does the software actually support FFmpeg 7?  
> This is a major version bump and so FFmpeg 7 is not
> ABI- or API-compatible with FFmpeg 6.
> 
> All the best,
> Frank
> 
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