The strike affects major national and regional broadcasters including France 3 and FranceBleu, with both providing local and regional news that is otherwise often overlooked by private broadcasters.
The strike is expected to continue into next week if the merger talks go ahead, say union bosses.
The prospective merger was set to be debated in parliament on May 28, but this has been postponed due other bills, including the agricultural bill, taking precedence.
The merger would see the groups combined into one major public broadcasting service along with certain other media that fall under the same category,
It would allow the various groups to “share their strengthsâ€, said Culture Minister Rachida Dati, who is spearheading the change.
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If her plans go ahead, a joint holding company would be used for all of the services from January 2025, with them merging in 2026.
Indeed, the joint company already exists, having been created when similar schemes were planned in the past, but ultimately fell through.
"It’s ten years now that parliament and the senate have been calling in unison for this reform,†said Renaissance MP Quentin Bataillon on on May 22. “We know that the status quo is untenable.â€
The influence of the internet - and social media in particular - are threats to the current model, said Mr Bataillon.
“We have to reform public broadcasters quickly to make them stronger and not take anything away from themâ€
Up to 16,000 employees in the sector may see their jobs affected by the changes, with those working in radio particularly concerned about being engulfed by the more prominent TV infrastructure.
However, the government has reassured staff members that the merger would not threaten the work they do.
“I want to guarantee not only your continuity but also your strength… in a world of exacerbated competition between platforms and social networks,†Ms Dati recently said.
“Obviously, we are not going to standardise either professions or activities,†she added in a Senate hearing on the matter earlier this week.