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Record, concatenate and synchronize Twitch live streams

Project description

Python utils for Twitch PyPI version

pip3 install tdh-twitch-utils[all]

This module supports partial installation:

Package Scripts Dependencies
tdh-twitch-utils concat FFmpeg
tdh-twitch-utils[record] concat, record FFmpeg, streamlink
tdh-twitch-utils[offset] concat, offset FFmpeg, praat-parselmouth
tdh-twitch-utils[mute] concat, mute FFmpeg, tensorflow, spleeter
tdh-twitch-utils[all] all of the above all of the above

You can also provide a list of extras in a single command:

pip3 install tdh-twitch-utils[record,offset]

concat

This script uses MPEG-TS timestamps to concatenate multiple video segments into a single file without re-encoding. It is most useful for assembling partial stream recordings in case of interruption or error during stream download. Overlapping parts will be removed precisely with ffmpeg's concat demuxer.

Example

# download two overlapping segments (60 seconds each)
VOD="YOUR VOD ID"
streamlink -o 1.ts --hls-duration 60 "twitch.tv/videos/$VOD" best
streamlink -o 2.ts --hls-start-offset 30 --hls-duration 60 "twitch.tv/videos/$VOD" best

# concatenate two segments into one video
twitch_utils concat 1.ts 2.ts -o result.mp4

# create one segment
twitch_utils concat 1.ts 2.ts -o result.ts

# pipe concatenated MPEG-TS stream to other applications
twitch_utils concat 1.ts 2.ts -o - | ffmpeg -i - -c copy result.mp4

record

This script can be used to record live streams without waiting for them to end. It starts to record live stream immediately, then downloads VOD and concatenates them into full stream recording.

Obviously, this script requires channel to have public VODs.

Algorithm:

  1. Check if channel is live and VOD for current stream already exists;
  2. Get live VOD ID from Twitch API;
  3. Start downloading live stream into file VOD.end.ts;
  4. Wait 1 minute and start downloading VOD into file VOD.start.ts;
  5. Wait for VOD download to finish;
  6. Check the possibility of concatenation and redownload VOD if timeline is not complete;
  7. Wait for stream to finish;
  8. Concatenate two parts via concat script (see above).

Note: Since Nov 2019 you have to provide your Twitch OAuth token in the command. Otherwise the script will not be able to detect the ID of the live VOD and download the beginning of the stream. At the moment, you will need to extract OAuth token from Twitch's cookie "auth-token". Other options such as providing your own Client-ID and token are not implemented yet.

This script is just a proof of concept and probably should not be relied upon.

Example

# Record live stream of channel 'blackufa' using 2 threads
twitch_utils record --oauth=YOUR_TOKEN blackufa -j 2

offset

This script performs cross-correlation of two audio files to find offset between them. First argument is cropped and used as template. Second argument can have any duration -- it will be divided into separate chunks to reduce memory usage (otherwise it wouldn't be possible to use exceptionally big files). Both arguments can be videos or audio files -- audio track will be extracted and converted. You can even use HTTP links if ffprobe is able to correctly determine second argument's duration.

Example

# Cut small segment from big video file (offset: 123 seconds)
ffmpeg -ss 123 -i YOUR_FILE.mp4 -t 60 -c copy template.mp4

# Find offset of template.mp4 within YOUR_FILE.mp4
twitch_utils offset template.mp4 YOUR_FILE.mp4
# ... returns 122.99997732426303

# Same command, but result will be rounded to nearest integer
twitch_utils offset template.mp4 YOUR_FILE.mp4 --round
# ... returns 123

mute

This script attempts to separate streamer's voice from background music by using Spleeter. Only specified time ranges are affected. Output contains the same video, but without music in these parts.

The main purpose of this script is to remove automated Content-ID claims from the video on YouTube without muting the whole section.

The result is similar to "Mute song only (beta)" in YouTube Studio, but this script is much faster and can handle multiple time ranges at once.

Note: Prebuilt binaries of Tensorflow require CPUs with AVX support.

Example

# Remove music from 5:00 to 8:00 and from 1:00:00 to 1:05:00
twitch_utils mute input.mp4 5:00~8:00 1:00:00~1:05:00 -o output.mp4

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