Convert STRG to MP4

Some NMS or E-Viewer recordings are saved as .strg backups, while phones, browsers, editors, and sharing services normally require MP4. The reliable conversion method is to open the backup in the software that created it and export a standard video file.

What the STRG format is

In this video context, STRG is an E-Viewer recorded-video copy backup associated with NMS software. It is a proprietary recording or backup format, not a standardized container like MP4, MOV, or AVI. Its video codec, indexes, timestamps, audio, and metadata depend on the NMS or E-Viewer version and recording device.

Do not identify the file by its extension alone. A STRG file may require companion files, an application database, or recorder-specific metadata. Renaming recording.strg to recording.mp4 changes only the filename; it does not convert the data.

What the MP4 format is

MP4 is a widely supported media container used by web browsers, phones, televisions, editing applications, and video platforms. For the broadest compatibility, export or encode it with H.264 video and AAC audio.

MP4 is easier to play, edit, share, and archive as a single standard file. Exporting may either copy compatible streams into an MP4 container or re-encode them; it cannot recover video that is missing, encrypted, damaged, or absent from the STRG backup.

How to convert STRG to MP4

Use NMS or E-Viewer first

1. Install or open the NMS/E-Viewer software and use the same account, recorder connection, or archive location associated with the recording.
2. Open the recording library or backup function and import the STRG file if the program does not detect it automatically. Keep any companion files in their original folder.
3. Select the recording and choose the program’s Export, Save video, Backup, or similarly named command. Select MP4 when available.
4. Choose H.264 for video and AAC for audio if codec settings are offered. Set the required time range, resolution, frame rate, and destination.
5. Play the exported file from beginning to end in VLC or another independent player before deleting the STRG backup.

The originating NMS/E-Viewer software is the appropriate converter because it can interpret proprietary indexes, timestamps, authentication, and recorder-specific encoding. If it exports only AVI or another readable format, convert that exported file to MP4 with HandBrake or FFmpeg.

Convert an exported video with desktop software

HandBrake is suitable after NMS has produced a normal video file. Open the exported file, select an MP4-compatible preset, confirm that the container is MP4, and use H.264 video with AAC audio. VLC can test playback and offers Media → Convert/Save, but it is less reliable with unusual codecs, multiple audio tracks, and proprietary source files.

FFmpeg can inspect a file that may contain ordinary media streams:

ffprobe -hide_banner input.strg

If FFprobe detects compatible video and audio streams, a stream copy may work without generational quality loss:

ffmpeg -i input.strg -map 0:v:0 -map 0:a? -c copy output.mp4

If the streams are readable but incompatible with MP4, re-encode them:

ffmpeg -i input.strg -map 0:v:0 -map 0:a? -c:v libx264 -preset medium -crf 20 -c:a aac -b:a 160k -movflags +faststart output.mp4

Lower CRF values generally produce higher quality and larger files. If FFprobe reports an unknown format, no media streams, or an input error, the STRG file is not usable by generic FFmpeg conversion; return to NMS/E-Viewer.

Online conversion services

CloudConvert and Convertio are reputable options for ordinary, playable video files, but neither is a dependable solution for proprietary STRG backups. Their upload systems may reject the extension, fail to decode the format, or process only an exported intermediary. Use an online service only after NMS has exported a standard video and only when the footage contains no personal, workplace, security, or surveillance material.

Quality and compatibility limits

Stream copying with -c copy avoids re-encoding loss but works only when the source streams and timing are valid in an MP4 container. H.264/AAC re-encoding improves device compatibility but reduces quality and can discard proprietary metadata, timecode, subtitles, extra audio tracks, or recorder-specific information.

Exported footage may differ from the original if NMS applies deinterlacing, scaling, frame-rate conversion, watermarking, or a selected time range. Preserve the original STRG files and their companion data for evidentiary or archival use; keep the MP4 as a playback or sharing copy.